Malware Analysis Report (AR21-048C)

MAR-10322463-3.v1 - AppleJeus: Union Crypto

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Malware Analysis Report
10322463.r3.v1
2021-02-12

Notification

This report is provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained herein. The DHS does not endorse any commercial product or service referenced in this bulletin or otherwise.

This document is marked TLP:WHITE--Disclosure is not limited. Sources may use TLP:WHITE when information carries minimal or no foreseeable risk of misuse, in accordance with applicable rules and procedures for public release. Subject to standard copyright rules, TLP:WHITE information may be distributed without restriction. For more information on the Traffic Light Protocol (TLP), see http://www.us-cert.gov/tlp.

Summary

Description

This Malware Analysis Report (MAR) is the result of analytic efforts among the Federal Bureau of Investigation (FBI), the Cybersecurity and Infrastructure Security Agency (CISA), and the Department of Treasury (Treasury) to highlight the cyber threat to cryptocurrency posed by North Korea, formally known as the Democratic People’s Republic of Korea (DPRK), and provide mitigation recommendations. Working with U.S. government partners, FBI, CISA, and Treasury assess that Lazarus Group—which these agencies attribute to North Korean state-sponsored advanced persistent threat (APT) actors—is targeting individuals and companies, including cryptocurrency exchanges and financial service companies, through the dissemination of cryptocurrency trading applications that have been modified to include malware that facilitates theft of cryptocurrency.

This MAR highlights this cyber threat posed by North Korea and provides detailed indicators of compromise (IOCs) used by the North Korean government. The U.S. Government refers to malicious cyber activity by the North Korean government as HIDDEN COBRA. For more information on other versions of AppleJeus and recommended steps to mitigate this threat, see Joint Cybersecurity Advisory AA21-048A: AppleJeus: Analysis of North Korea's Cryptocurrency Malware at https://www.us-cert.cisa.gov/ncas/alerts/AA21-048A.

There have been multiple versions of AppleJeus malware discovered since its initial discovery in August 2018. In most versions, the malware appears to be from a legitimate-looking cryptocurrency trading company and website, whereby an unsuspecting individual downloads a third-party application from a website that appears legitimate.

The U.S. Government has identified AppleJeus malware version—Union Crypto—and associated IOCs used by the North Korean government in AppleJeus operations.

Union Crypto, discovered by a cybersecurity company in December 2019, is a legitimate-looking cryptocurrency trading software that is marketed and distributed by a company and website—Union Crypto and unioncrypto[.]vip, respectively—that appear legitimate.

For a downloadable copy of IOCs, see: MAR-10322463-3.v1.stix.

Submitted Files (8)

01c13f825ec6366ac2b6dd80e5589568fa5c8685cb4d924d1408e3d7c178902f (UnionCryptoUpdater.exe)

0967d2f122a797661c90bc4fc00d23b4a29f66129611b4aa76f62d8a15854d36 (UnionCryptoTrader.exe)

2ab58b7ce583402bf4cbc90bee643ba5f9503461f91574845264d4f7e3ccb390 (UnionCryptoTrader.dmg)

631ac269925bb72b5ad8f469062309541e1edfec5610a21eecded75a35e65680 (unioncryptoupdater)

6f45a004ad6bb087f733feb618e115fe88164f6db9562cb9b428372c9add75f0 (UnionCryptoTrader)

755bd7a3765efceb8183ffade090ef2637a85c4505f8078dda116013dd5758f3 (NodeDLL.dll)

af4144c1f0236e6b59f40d88635ec54c2ef8034f6a96a83f5dbfd6b8ea2c0d49 (UnionCryptoTrader.msi)

e3623c2440b692f6b557a862719dc95f41d2e9ad7b560e837d3b59bfe4b8b774 (UnionCryptoSetup.exe)

Domains (1)

unioncrypto.vip

IPs (1)

216.189.150.185

Findings

e3623c2440b692f6b557a862719dc95f41d2e9ad7b560e837d3b59bfe4b8b774

Tags

trojan

Details
Name UnionCryptoSetup.exe
Size 30330443 bytes
Type PE32 executable (GUI) Intel 80386, for MS Windows
MD5 24b3614d5c5e53e40b42b4e057001770
SHA1 b040433fb50d679b2e287d7fcc1667a415fb60b0
SHA256 e3623c2440b692f6b557a862719dc95f41d2e9ad7b560e837d3b59bfe4b8b774
SHA512 55e9c7f59189e395b6b348d9fa8b4b907d0cedd790a33603a49ac857f5a07b205f8787fab0c7a9954e992852e6e5090f3cbf2243e86bb2546bd5628619648d87
ssdeep 786432:Dj2fi5nBGPBMNekleUtOaZ13vcdkIXX0kfp:+65AP+QAeUtOKvc+c0kR
Entropy 7.984564
Antivirus
Filseclab W32.ELEX.L.erpg.mg
Microsoft Security Essentials Trojan:Win32/UnionCryptoTrader!ibt
YARA Rules

No matches found.

ssdeep Matches

No matches found.

PE Metadata
Compile Date 2018-09-20 09:08:01-04:00
Import Hash cbc19a820310308f17b0a7c562d044e0
Company Name UnionCrypto Co.Ltd
File Description Union Crypto Trader
Internal Name UnionCryptoTraderSetup.exe
Legal Copyright © UnionCrypto Corporation. All Rights Reserved.
Original Filename UnionCryptoTraderSetup.exe
Product Name Union Crypto Trader
Product Version 1.0.23.474
PE Sections
MD5 Name Raw Size Entropy
566abfd43bde6dda239bf28ac9b087ae header 1024 2.960546
764b34cabee1111c9e11c8f836aebafb .text 608256 6.539792
7989312225f01ce65374248a3e73a557 .rdata 189440 4.588598
1ac52732b5e747734a833e523cd8f27f .data 10240 4.418143
3afae9bb129e782e05f70b3416946646 .rsrc 434688 6.340500
d11bf51446bb40b38f82ba6ce1f57dc4 .reloc 162816 2.478756
Packers/Compilers/Cryptors
Microsoft Visual C++ ?.?
Relationships
e3623c2440... Contains af4144c1f0236e6b59f40d88635ec54c2ef8034f6a96a83f5dbfd6b8ea2c0d49
Description

This Windows program from the Union Crypto Trader site is a Windows executable. This executable is actually an installer, and will first extract a temporary MSI named UnionCryptoTrader.msi (af4144c1f0236e6b59f40d88635ec54c2ef8034f6a96a83f5dbfd6b8ea2c0d49) to the “C:\Users\<username>\AppData\Local\Temp\{82E4B719-90F7-4BD1-9CF1-56CD777E0C42}” folder, which will be executed by "UnionCryptoTraderSetup.exe" and deleted after it successfully completes the installation.

unioncrypto.vip

Tags

command-and-control

URLs
  • hxxps[:]//unioncrypto.vip/update
  • hxxps[:]//www[.]unioncrypto.vip/download/W6c2dq8By7luMhCmya2v97YeN
Whois

Whois for unioncrypto.vip had the following information on December 8, 2019:
Registrar: NameCheap
Created: June 5, 2019
Expires: June 5, 2020
Updated: June 5, 2019

Relationships
unioncrypto.vip Downloaded_To 2ab58b7ce583402bf4cbc90bee643ba5f9503461f91574845264d4f7e3ccb390
unioncrypto.vip Downloaded_To 755bd7a3765efceb8183ffade090ef2637a85c4505f8078dda116013dd5758f3
Description

While this site is no longer available, a download link of hxxps[:]//www[.]unioncrypto.vip/download/W6c2dq8By7luMhCmya2v97YeN was discovered by a cyber-security researcher and is recorded on VirusTotal for the OSX version of UnionCryptoTrader. In contrast, open source reporting disclosed the Windows version may have been downloaded via Telegram, as it was found in a “Telegram Downloads” folder on an unnamed victim. Union Crypto Trader has a legitimately signed Sectigo SSL certificate, which was “Domain Control Validated” just as the previous version certificates. .

The domain is registered with NameCheap at the IP address 104.168.167.16 with ASN 54290.

Screenshots
Figure 1 - Screenshot of the Union Crypto Trader website.

Figure 1 - Screenshot of the Union Crypto Trader website.

af4144c1f0236e6b59f40d88635ec54c2ef8034f6a96a83f5dbfd6b8ea2c0d49

Tags

dropper

Details
Name UnionCryptoTrader.msi
Size 14634496 bytes
Type Composite Document File V2 Document, Little Endian, Os: Windows, Version 10.0, MSI Installer, Number of Characters: 0, Last Saved By: InstallShield, Number of Words: 0, Title: Union Crypto Trader, Comments: Contact: Your local administrator, Keywords: Installer, Subject: Smart Cryptocurrency Arbitrage Trading Platform, Author: UnionCryptoTrader, Security: 1, Number of Pages: 200, Name of Creating Application: InstallShield 2018 - Premier Edition with Virtualization Pack 24, Last Saved Time/Date: Tue Aug 6 23:59:58 2019, Create Time/Date: Tue Aug 6 23:59:58 2019, Last Printed: Tue Aug 6 23:59:58 2019, Revision Number: {44311F94-C85D-4688-996A-4888F2D32062}, Code page: 1252, Template: x64;1033
MD5 0f03ec3487578cef2398b5b732631fec
SHA1 349fb7c922fba6da4bf5c2a3a9e0735f11068dac
SHA256 af4144c1f0236e6b59f40d88635ec54c2ef8034f6a96a83f5dbfd6b8ea2c0d49
SHA512 f2aa24d96daf090f3a29b5536f3ce0a9a59171b7fdb85887bc32ea6c5305e5ee03153b2c402399dd05a28d6fa90a3e979cc8153fd69686b5bbbb4ec199b8f2b3
ssdeep 393216:zDea98QM1lKTmbHJdgXuUSCve2TN4ksIVVYlm6j8ziFS:XeanAKTuHbd9Ye2qpj8Og
Entropy 7.948615
Antivirus
TrendMicro TROJ_FR.DEFD7DB1
TrendMicro House Call TROJ_FR.DEFD7DB1
YARA Rules

No matches found.

ssdeep Matches

No matches found.

Relationships
af4144c1f0... Contained_Within e3623c2440b692f6b557a862719dc95f41d2e9ad7b560e837d3b59bfe4b8b774
af4144c1f0... Contains 01c13f825ec6366ac2b6dd80e5589568fa5c8685cb4d924d1408e3d7c178902f
af4144c1f0... Contains 0967d2f122a797661c90bc4fc00d23b4a29f66129611b4aa76f62d8a15854d36
Description

This Windows program is a Windows MSI Installer. The MSI installer will install "UnionCryptoTrader.exe"(0967d2f122a797661c90bc4fc00d23b4a29f66129611b4aa76f62d8a15854d36) in the “C:\Program Files\UnionCryptoTrader” folder and also install UnionCryptoUpdater.exe (01c13f825ec6366ac2b6dd80e5589568fa5c8685cb4d924d1408e3d7c178902f) in the “C:\Users\<username>\AppData\Local\UnionCryptoTrader” folder. Immediately after installation, the installer launches "UnionCryptoUpdater.exe."

Screenshots
Figure 2 - Screenshot of the UnionCryptoTrader Installation.

Figure 2 - Screenshot of the UnionCryptoTrader Installation.

0967d2f122a797661c90bc4fc00d23b4a29f66129611b4aa76f62d8a15854d36

Tags

trojan

Details
Name UnionCryptoTrader.exe
Size 1286144 bytes
Type PE32+ executable (GUI) x86-64, for MS Windows
MD5 46b3061fe981d0a5edfd8d55f75adf9f
SHA1 514263acf79aeb49d87192ae08f6c76854cdda12
SHA256 0967d2f122a797661c90bc4fc00d23b4a29f66129611b4aa76f62d8a15854d36
SHA512 38418a2f3a8870352d8a88d6fb48e2c93a35b48a559590beb12c7c507eadfd07bf087ea11e822fc3e7bc9d6710b17cb68c416ffcf87a787ed9428f2c6b56413e
ssdeep 24576:fnrKym9OWCy0frP+1obeVbK8KW/TJ9+FCPjjcym8MUml:fnrKb9OWCy0q1obeVbPKW/TKcjlmhUml
Entropy 6.414530
Antivirus

No matches found.

YARA Rules

No matches found.

ssdeep Matches

No matches found.

PE Metadata
Compile Date 2019-08-06 21:22:00-04:00
Import Hash e0f869ddf0b356ab31c5676591e890ed
Company Name UnionCrypto Co.Ltd
File Description Union Crypto Trader
Internal Name UnionCryptoTrader.exe
Legal Copyright © UnionCrypto Corporation. All rights reserved.
Original Filename UnionCryptoTrader.exe
Product Name Union Crypto Trader
Product Version 1.00.0000
PE Sections
MD5 Name Raw Size Entropy
8a496cd41319fdb127a000e7a43bdfd4 header 1024 3.518197
686f2fe8e51a4327d3e25e937c5eb1cc .text 878080 6.431878
8f5b24579aaf7ecbc95b26614cf51e8c .rdata 230912 5.566823
91b3d6678654de37caa94b211aae696e .data 15360 4.052861
af667013369aea1785ada0e5442bcf07 .pdata 41472 6.082142
aced93d352d733478dc51a779aef0c62 .gfids 512 0.317810
1f354d76203061bfdd5a53dae48d5435 .tls 512 0.020393
285d8a234d06cfb54adffe2eb077a2fe .rsrc 113664 3.831914
241aeb18e88145608a8b273404896f72 .reloc 4608 5.365584
Packers/Compilers/Cryptors
Microsoft Visual C++ 8.0 (DLL)
Relationships
0967d2f122... Contained_Within af4144c1f0236e6b59f40d88635ec54c2ef8034f6a96a83f5dbfd6b8ea2c0d49
Description

This file is a 64-bit Windows executable contained within the Windows MSI Installer "UnionCryptoTrader.msi." When executed, "UnionCryptoTrader.exe" loads a legitimate cryptocurrency arbitrage application with no signs of malicious activity. (Note: arbitrage is defined as “the simultaneous buying and selling of securities, currency, or commodities in different markets or in derivative forms in order to take advantage of differing prices for the same asset”).

This application does not appear to be a modification of the Windows QT Bitcoin Trader, but may be a modification of Blackbird Bitcoin Arbitrage.

In addition to the "unioncrypto.vip" site describing "UnionCryptoTrader.exe" as a “Smart Cryptocurrency Arbitrage Trading Platform," many of the strings found in "UnionCryptoTrader.exe" have references to Blackbird Bitcoin Arbitrage including but not limited to:

--Begin similarities--
Blackbird Bitcoin Arbitrage
| Blackbird Bitcoin Arbitrage Log File |
output/blackbird_result_
output\blackbird_log_
ERROR: Blackbird needs at least two Bitcoin exchanges. Please edit the config.json file to add new exchanges
--End similarities--

The strings also contain the links and references to all fourteen exchanges listed as implemented or potential on the Blackbird GitHub page. In addition, the "config.txt" file found in the “C:\Program Files\UnionCryptoTrader” folder with "UnionCryptoTrader.exe" also contains references to all fourteen exchanges, as well as sets the database file to "blackbird.db." The file "blackbird.db" is also found in the same folder.

Screenshots
Figure 3 - Screenshot of the "UnionCryptoTrader.exe"application.

Figure 3 - Screenshot of the "UnionCryptoTrader.exe"application.

01c13f825ec6366ac2b6dd80e5589568fa5c8685cb4d924d1408e3d7c178902f

Tags

trojan

Details
Name UnionCryptoUpdater.exe
Size 161280 bytes
Type PE32+ executable (console) x86-64, for MS Windows
MD5 629b9de3e4b84b4a0aa605a3e9471b31
SHA1 1ef0e1cabd344726b663cec8d9e68f147259da55
SHA256 01c13f825ec6366ac2b6dd80e5589568fa5c8685cb4d924d1408e3d7c178902f
SHA512 c70abbe52cbbed220fee218664d1c5f4313bd5387de11c275aa31115e90328dac032c6138954f3931c7d134e8613ad6c278ed29d78c0dc8199a1433b1a106132
ssdeep 3072:Q/MdytyORF471FiHNkwBFTdpSI94e1ZVypzCG9n7r:Q/ftvF471AHNFjdYIZOt
Entropy 6.192246
Antivirus
Avira TR/Agent.pfpad
BitDefender Trojan.GenericKD.33626108
Comodo Malware
ESET a variant of Win64/Agent.UV trojan
Emsisoft Trojan.GenericKD.33626108 (B)
Ikarus Trojan.Win64.Agent
K7 Trojan ( 0056425b1 )
Lavasoft Trojan.GenericKD.33626108
McAfee Trojan-Agent.c
NANOAV Trojan.Win64.Mlw.icfhya
Symantec Trojan.Gen.2
TACHYON Trojan/W64.Agent.161280.C
TrendMicro TROJ_FR.DEFD7DB1
TrendMicro House Call TROJ_FR.DEFD7DB1
VirusBlokAda Trojan.Win64.Agentb
Zillya! Trojan.Agent.Win64.5106
YARA Rules

No matches found.

ssdeep Matches

No matches found.

PE Metadata
Compile Date 2019-08-06 22:00:26-04:00
Import Hash e217501515a13bba8aefe7dcf3b74f33
Company Name UnionCrypto Co.Ltd
File Description Union Crypto Trading Updater
Internal Name unioncryptoupdater.exe
Legal Copyright © UnionCrypto Corporation. All rights reserved.
Original Filename unioncryptoupdater.exe
Product Name Union Crypto Trading Updater
Product Version 1.0.23.474
PE Sections
MD5 Name Raw Size Entropy
9b73650178bdd95af246609c1b650253 header 1024 3.045187
ac3f61418ff1daa9142e2304a647c2aa .text 98816 6.452850
cc2de13f05d38702ac9a560e450ab54a .rdata 48128 5.088494
20ef8fb99461ca48fe9ed26ffb4cc26c .data 3072 2.234569
abf07cda1f35bf5fe4a9ac21de63f903 .pdata 6144 5.155358
3eab486bdf211a98334f08a5145dbf94 .gfids 512 1.857174
c9ab77353b20e3b22c344b60c8859d56 .rsrc 1536 3.943344
a9cd219d9ad71f6c2c60efc1308885c8 .reloc 2048 4.924725
Packers/Compilers/Cryptors
Microsoft Visual C++ 8.0 (DLL)
Relationships
01c13f825e... Downloaded 755bd7a3765efceb8183ffade090ef2637a85c4505f8078dda116013dd5758f3
01c13f825e... Contained_Within af4144c1f0236e6b59f40d88635ec54c2ef8034f6a96a83f5dbfd6b8ea2c0d49
Description

This file is a 64-bit Windows executable contained within the Windows MSI Installer "UnionCryptoTrader.msi." When executed, "UnionCryptoUpdater.exe" first installs itself as a service, which will automatically start when any user logs on. The service is installed with a description stating it “Automatically installs updates for Union Crypto Trader."

After installing the service, "UnionCryptoUpdater.exe" collects different information about the system the malware is running on. Specifically, it uses Windows Management Instrumentation (WMI) Query Language (WQL) to collect this information. "UnionCryptoUpdater.exe" first finds the BIOS Serial Number by using the “SELECT * FROM Win32_Bios” WMI filter as a WQL Query String (Figure 4).

This returns SMBBIOSBIOSVersion, Manufacturer, Name, SerialNumber, and Version. The function later pulls the “SerialNumber” from this returned data (Figure 5).

The same process is followed to pull the operating system version and build number. The WQL Query String is “SELECT * FROM Win32_OperatingSystem," and the fields pulled are “Caption” and “BuildNumber." Note that the “Caption” field contains the OS version for the computer running the malware.

After collecting the system data, "UnionCryptoUpdater.exe" then builds a string consisting of the current time and the hard-coded value “12GWAPCT1F0I1S14." The current time is stored in the "auth_timestamp" variable.

This combined string is MD5 hashed and stored in the "auth_signature" variable. These variables are sent in the first communication to the command and control (C2) server, and are likely used to verify any connections to the server are actually originating from the "UnionCryptoUpdater.exe" malware.

These variables are sent via a POST the C2 hxxps[:]//unioncrypto.vip/update along with the collected system data. The system data is sent in this specific format:

--Begin format--
rlz=[BIOS serial number]&ei=[OS Version] (BuildNumber)&act=check
--End format--

These values, along with a hard-coded User Agent String of “Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36” can be found in the malware data section.

If the POST is successful (i.e. returns an HTTP response status code of 200), but returns a string of “0”, UnionCryptoUpdater.exe will sleep for ten minutes and then regenerate the "auth_timestamp" and "auth_signature" to contact the C2 again.

If the POST is successful and the C2 server does not return the string “0”, the malware will decode the base64 payload and decrypt it. It then uses built in C++ functions to allocate memory, write the payload to memory, and executes the payload. If this is successful, the malware will send another POST to the C2 with the value “act=done” replacing the “act=check” for the previously specified format (Figure 9).

Screenshots
Figure 4 - Screenshot of the "UnionCryptoUpdater" Service.

Figure 4 - Screenshot of the "UnionCryptoUpdater" Service.

Figure 5 - Screenshot of the "SELECT * FROM Win32_Bios" query string.

Figure 5 - Screenshot of the "SELECT * FROM Win32_Bios" query string.

Figure 6 - Screenshot of the "SerialNumber" selection.

Figure 6 - Screenshot of the "SerialNumber" selection.

Figure 7 - Screenshot of the "UnionCryptoUpdater.exe" getting current time and combining with hard-coded value.

Figure 7 - Screenshot of the "UnionCryptoUpdater.exe" getting current time and combining with hard-coded value.

Figure 8 - Screenshot of the hard-coded values and User Agent in "UnionCryptoUpdater.exe."

Figure 8 - Screenshot of the hard-coded values and User Agent in "UnionCryptoUpdater.exe."

Figure 9 - Screenshot of the hard-coded "&act=done" value.

Figure 9 - Screenshot of the hard-coded "&act=done" value.

755bd7a3765efceb8183ffade090ef2637a85c4505f8078dda116013dd5758f3

Tags

trojan

Details
Name NodeDLL.dll
Size 537616 bytes
Type PE32+ executable (DLL) (GUI) x86-64, for MS Windows
MD5 549db64ceaebbbdd9068d761cb5c616c
SHA1 6d91ce7b9f38e2316aa9fb50ececc02eadc4cd70
SHA256 755bd7a3765efceb8183ffade090ef2637a85c4505f8078dda116013dd5758f3
SHA512 0281257ad97e0765b57d29bb22fe9973f4ad5c42a93762eda1b12e71f78d02155fe32eda4ccd4acadbfccf61563175c28c520df5b631698573422048dce6a8c0
ssdeep 12288:FOvSQSQs75paRGK9EovEfM9NosCz4jcauwVyZE19QLC:Mv0VpkGYvI6NAz4j5LV6+
Entropy 6.433002
Antivirus

No matches found.

YARA Rules

No matches found.

ssdeep Matches

No matches found.

PE Metadata
Compile Date 2019-10-21 12:33:45-04:00
Import Hash c24e1d44f912d970e41414c324d04158
PE Sections
MD5 Name Raw Size Entropy
41f1664ee936eb5e9c5a402b9f791086 header 1024 3.215046
d7c3e5262e243bfd078cc689c0dcc509 .text 393728 6.418398
0155d4e1f35b8f139d07993866f1e2f6 .rdata 115200 5.560875
67b68408aebc7de9f6019e94ab5cf2ce .data 3584 2.251912
809c1804672ec420bb9f366f30b025fb .pdata 20480 5.768325
7eb4b39b296be7f4de3339727d0f1eb0 .gfids 512 1.995088
28984c1ba2156023b894e0041ecd2479 .rsrc 512 4.724729
1c7de4ac5824c7b888e15c611cb69191 .reloc 2560 5.180527
Relationships
755bd7a376... Downloaded_By 01c13f825ec6366ac2b6dd80e5589568fa5c8685cb4d924d1408e3d7c178902f
755bd7a376... Downloaded_From unioncrypto.vip
755bd7a376... Connected_To 216.189.150.185
Description

This file is a 64-bit dynamic-link library (DLL). This file was identified as a payload for the Windows malware. This stage 2 is not immediately downloaded by "UnionCryptoUpdater.exe," but instead is downloaded after a period of time likely specified by the C2 server at "hxxps[:]//unioncrypto.vip/update." This delay could be implemented to prevent researchers from immediately obtaining the stage 2 malware.

The C2 and build path are visible from the "NodeDLL.dll" strings. The C2 for the malware is hxxp[:]//216.189.150.185:8080/push.jsp.

The build path found in the strings is “Z:\Opal\bin\x64_Release\NodeDll.pdb." This stage 2 is likely part of a project named “Opal” by the actors, due to the folder in the build path.

NodeDLL.dll has multiple functionalities which can be verified by examining the program imports and strings. Functionalities with corresponding strings/imports include but are not limited to:
1. Get/Update implant configuration
   a. Imports: GetComputerNameA, GetCurrentDirectoryW, GetStartupInfoW, GetTimeZoneInformation
   b. Strings: CurrentUser
2. Get/Put a file or directory
   a. Imports: WriteFile
3. Execute a program
   a. Imports: CreateProcessW
4. Directory listing
   a. Imports: GetCurrentDirectoryW
5. Active Drive Listing (C:\, D:\, etc.)
   a. Imports: GetLogicalDrives, GetDriveTypeW
6. Move a file/directory
   a. Imports: CreateDirectoryW, MoveFileExW
7. Delete a file/directory
   a. Imports: DeleteFileW
8. Screenshot active desktop
   a. Imports: GetDIBits, CreateCompatibleBitmap, BitBlt, etc from gdi32
9. Execute a shell command through cmd.exe
   a. Imports: GetCommandLineW, GetCommandLineA, CreateProcessAsUserW
10. Check IPv4 TCP connectivity against specified target
   a. Imports: connect, bind, send, socket, getaddrinfo, etc. from ws2_32
   b. Strings: Network unreachable, HTTP/1.%d %d, httponly, Remote file not found
11. Update configuration (beacon interval, AP address, etc.)
   a. Strings: Host: %s%s%s:%d, Set-Cookie:

The "NodeDLL.dll" strings also show a hard-coded user agent string: “Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36 Edge/17.17134”. Finally, a format string which matches the HostUS C2 is found in the strings: "%s://%s%s%s:%d%s%s%s," along with many references to proxies or proxy configurations.

216.189.150.185

Tags

command-and-control

URLs
  • 216.189.150.185:8080/push.jsp
Ports
  • 8080 TCP
Whois

Queried whois.arin.net with "n 216.189.150.185"...

NetRange:     216.189.144.0 - 216.189.159.255
CIDR:         216.189.144.0/20
NetName:        HOSTUS-IPV4-3
NetHandle:     NET-216-189-144-0-1
Parent:         NET216 (NET-216-0-0-0-0)
NetType:        Direct Allocation
OriginAS:     AS7489, AS25926
Organization: HostUS (HOSTU-4)
RegDate:        2014-08-29
Updated:        2015-12-29
Comment:        Please send all abuse reports to abuse@hostus.us
Ref:            https://rdap.arin.net/registry/ip/216.189.144.0


OrgName:        HostUS
OrgId:         HOSTU-4
Address:        125 N Myers St
City:         Charlotte
StateProv:     NC
PostalCode:     28202
Country:        US
RegDate:        2013-07-26
Updated:        2019-10-23
Comment:        IP addresses from this network are further reallocated or assigned to customers.
Comment:        Please send all abuse reports to abuse@hostus.us.
Comment:        Abuse reports must be submitted through email with the IP address in title.
Ref:            https://rdap.arin.net/registry/entity/HOSTU-4


OrgNOCHandle: HOSTU2-ARIN
OrgNOCName: HostUS Tech
OrgNOCPhone: +1-302-300-1737
OrgNOCEmail: noc@hostus.us
OrgNOCRef:    https://rdap.arin.net/registry/entity/HOSTU2-ARIN

OrgAbuseHandle: HAD18-ARIN
OrgAbuseName: HostUS Abuse Desk
OrgAbusePhone: +1-302-300-1737
OrgAbuseEmail: abuse@hostus.us
OrgAbuseRef:    https://rdap.arin.net/registry/entity/HAD18-ARIN

OrgTechHandle: HOSTU2-ARIN
OrgTechName: HostUS Tech
OrgTechPhone: +1-302-300-1737
OrgTechEmail: noc@hostus.us
OrgTechRef:    https://rdap.arin.net/registry/entity/HOSTU2-ARIN

Relationships
216.189.150.185 Connected_From 755bd7a3765efceb8183ffade090ef2637a85c4505f8078dda116013dd5758f3
Description

The C2 identified for NodeDLL.dll. The IP address 216.189.150.185 has ASN 7489 and is owned by HostUS.

2ab58b7ce583402bf4cbc90bee643ba5f9503461f91574845264d4f7e3ccb390

Tags

backdoordownloaderloadertrojan

Details
Name UnionCryptoTrader.dmg
Size 20911661 bytes
Type zlib compressed data
MD5 6588d262529dc372c400bef8478c2eec
SHA1 06d9f835efd1c05323f6a3abdf66e6be334e47c4
SHA256 2ab58b7ce583402bf4cbc90bee643ba5f9503461f91574845264d4f7e3ccb390
SHA512 4a90cd71e210662c3e21994a6af6d80f45c394b972d85ba725dc0e33721036c38b68829ca831113276cbea891fc075e1fa9911aad1fc647b0c2a2bb7a9d965cd
ssdeep 393216:psbbiMqkRiP3p+/34QRDCLqKbNH40iBNTnz0xcECffBJrd8ur8dx3PAxC9lG:WbipIM3p+/TBvBN0xcRmur8dxIxC9l
Entropy 7.997189
Antivirus
Ahnlab Backdoor/OSX.Nukesped.20911661
Antiy Trojan/Mac.NukeSped
Avira OSX/Dldr.NukeSped.rtyrb
BitDefender Trojan.MAC.Lazarus.F
Cyren Trojan.PXZN-6
ESET OSX/TrojanDownloader.NukeSped.B trojan
Emsisoft Trojan.MAC.Lazarus.F (B)
Ikarus Trojan-Downloader.OSX.Nukesped
K7 Trojan ( 0001140e1 )
Lavasoft Trojan.MAC.Lazarus.F
McAfee OSX/Nukesped.b
Microsoft Security Essentials Trojan:MacOS/NukeSped.C!MTB
Sophos OSX/NukeSped-AB
Symantec OSX.Trojan.Gen
TrendMicro Trojan.3657DE58
TrendMicro House Call Trojan.3657DE58
Zillya! Downloader.Agent.OSX.68
YARA Rules

No matches found.

ssdeep Matches

No matches found.

Relationships
2ab58b7ce5... Downloaded_From unioncrypto.vip
2ab58b7ce5... Contains 6f45a004ad6bb087f733feb618e115fe88164f6db9562cb9b428372c9add75f0
2ab58b7ce5... Contains 631ac269925bb72b5ad8f469062309541e1edfec5610a21eecded75a35e65680
Description

This OSX program from the "UnionCrypto" download link is an Apple DMG installer.

The OSX program does not have a digital signature, and will warn the user of that before installation. Just as previous versions, the UnionCrypto installer appears to be legitimate and installs both “UnionCryptoTrader” (6f45a004ad6bb087f733feb618e115fe88164f6db9562cb9b428372c9add75f0) in the “/Applications/UnionCryptoTrader.app/Contents/MacOS/” folder and a hidden program named “.unioncryptoupdater” (631ac269925bb72b5ad8f469062309541e1edfec5610a21eecded75a35e65680) in the “/Applications/UnionCryptoTrader.app/Contents/Resources/” folder. The installer contains a postinstall script (see figure 10).

This postinstall script is identical in functionality to the postinstall script for the second version. It moves the hidden plist file (.vip.unioncrypto.plist) to the LaunchDaemons folder and changes the file permissions for the plist to be owned by root. Once in the LaunchDaemons folder, this program will be ran on system load as root for every user. This will launch the unioncryptoupdater program.

The postinstall script also moves the hidden “.unioncryptoupdater” binary to a new location “/Library/UnionCrypto/unioncryptoupdater” and makes the file executable. As the LaunchDaemon will not be run immediately after the plist file is moved, the postinstall script then launches the unioncryptoupdater program in the background (&). In contrast to the CelasTradePro “Updater” binary and JMTTrader “CrashReporter” binary, the unioncryptoupdater binary is not launched with any parameters.

Screenshots
Figure 10 - Screenshot of the postinstall script included in UnionCryptoTrader installer.

Figure 10 - Screenshot of the postinstall script included in UnionCryptoTrader installer.