Malware Analysis Report

2024-09-11 13:54

Sample ID 240615-b8llmsyenr
Target c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847
SHA256 c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847
Tags
xworm execution persistence rat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847

Threat Level: Known bad

The file c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847 was found to be: Known bad.

Malicious Activity Summary

xworm execution persistence rat trojan

Detects Windows executables referencing non-Windows User-Agents

Xworm family

Xworm

Detect Xworm Payload

Detects Windows executables referencing non-Windows User-Agents

Command and Scripting Interpreter: PowerShell

Drops startup file

Checks computer location settings

Adds Run key to start application

Looks up external IP address via web service

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-15 01:48

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A

Detects Windows executables referencing non-Windows User-Agents

Description Indicator Process Target
N/A N/A N/A N/A

Xworm family

xworm

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-15 01:48

Reported

2024-06-15 01:51

Platform

win10v2004-20240611-en

Max time kernel

125s

Max time network

138s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe"

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A

Xworm

trojan rat xworm

Detects Windows executables referencing non-Windows User-Agents

Description Indicator Process Target
N/A N/A N/A N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe N/A

Drops startup file

Description Indicator Process Target
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\java.lnk C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\java.lnk C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\java = "C:\\Users\\Admin\\AppData\\Roaming\\java" C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1856 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1856 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1856 wrote to memory of 4132 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1856 wrote to memory of 4132 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1856 wrote to memory of 4344 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1856 wrote to memory of 4344 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1856 wrote to memory of 1680 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1856 wrote to memory of 1680 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

Processes

C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe

"C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\java'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'java'

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
BE 23.41.178.65:443 www.bing.com tcp
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
BE 23.41.178.65:443 www.bing.com tcp
US 8.8.8.8:53 65.178.41.23.in-addr.arpa udp
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 1.112.95.208.in-addr.arpa udp
US 8.8.8.8:53 z-cv.gl.at.ply.gg udp
US 147.185.221.20:14939 z-cv.gl.at.ply.gg tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 100.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 21.121.18.2.in-addr.arpa udp
US 147.185.221.20:14939 z-cv.gl.at.ply.gg tcp
US 8.8.8.8:53 98.58.20.217.in-addr.arpa udp
US 147.185.221.20:14939 z-cv.gl.at.ply.gg tcp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 147.185.221.20:14939 z-cv.gl.at.ply.gg tcp
US 147.185.221.20:14939 z-cv.gl.at.ply.gg tcp

Files

memory/1856-0-0x00007FFE70A13000-0x00007FFE70A15000-memory.dmp

memory/1856-1-0x00000000006C0000-0x00000000006D8000-memory.dmp

memory/1856-2-0x00007FFE70A10000-0x00007FFE714D1000-memory.dmp

memory/468-3-0x00007FFE70A10000-0x00007FFE714D1000-memory.dmp

memory/468-4-0x00007FFE70A10000-0x00007FFE714D1000-memory.dmp

memory/468-5-0x00007FFE70A10000-0x00007FFE714D1000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_biool03i.l4e.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/468-15-0x00000206E72E0000-0x00000206E7302000-memory.dmp

memory/468-18-0x00007FFE70A10000-0x00007FFE714D1000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 cb3a799921d48256ab45414af88b0aa8
SHA1 8888fb5656f5f11576c0fbc3ba45d7df56000d28
SHA256 5ad60a0e324106c6b5a8a7c41b4eac83234ed53cf26025dd4d63c0750b265105
SHA512 21b53b49d0f95cb600444b15a274c31d9374ae96dc2ab464e6ada96bae11f1000e92f6f51f62e5b91891dbbb30e6ab9c71006a9a166b8d4ae24457dcd7efdf69

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 e25058a5d8ac6b42d8c7c9883c598303
SHA1 bd9e6194a36a959772fc020f905244900ffc3d57
SHA256 9f6fe2203df58ba90b512b436fd74f5eeb4f39f4f9f54a41e882fc54e5f35d51
SHA512 0146f2d1298acf189005217784e952d6e99bf7c8bf24ae9e9af1a2ca3d881dca39f19f3ecd06c7d0ad919bc929edaf6e97e0ab2d7f71733b9422527c594ea0c5

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 a7cc007980e419d553568a106210549a
SHA1 c03099706b75071f36c3962fcc60a22f197711e0
SHA256 a5735921fc72189c8bf577f3911486cf031708dc8d6bc764fe3e593c0a053165
SHA512 b9aaf29403c467daef80a1ae87478afc33b78f4e1ca16189557011bb83cf9b3e29a0f85c69fa209c45201fb28baca47d31756eee07b79c6312c506e8370f7666

memory/1856-56-0x00007FFE70A13000-0x00007FFE70A15000-memory.dmp

memory/1856-57-0x00007FFE70A10000-0x00007FFE714D1000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-15 01:48

Reported

2024-06-15 01:51

Platform

win7-20240611-en

Max time kernel

143s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe"

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A

Xworm

trojan rat xworm

Detects Windows executables referencing non-Windows User-Agents

Description Indicator Process Target
N/A N/A N/A N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\java.lnk C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\java.lnk C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1340930862-1405011213-2821322012-1000\Software\Microsoft\Windows\CurrentVersion\Run\java = "C:\\Users\\Admin\\AppData\\Roaming\\java" C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2940 wrote to memory of 2596 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2940 wrote to memory of 2596 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2940 wrote to memory of 2596 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2940 wrote to memory of 2636 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2940 wrote to memory of 2636 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2940 wrote to memory of 2636 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2940 wrote to memory of 2924 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2940 wrote to memory of 2924 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2940 wrote to memory of 2924 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2940 wrote to memory of 1852 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2940 wrote to memory of 1852 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2940 wrote to memory of 1852 N/A C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

Processes

C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe

"C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'c39a61b17b9dfe4ceb6b4ad52223be0e3dfb9692978edbe2cfa4e835e3ff1847.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\java'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'java'

Network

Country Destination Domain Proto
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 z-cv.gl.at.ply.gg udp
US 147.185.221.20:14939 z-cv.gl.at.ply.gg tcp
US 147.185.221.20:14939 z-cv.gl.at.ply.gg tcp
US 147.185.221.20:14939 z-cv.gl.at.ply.gg tcp
US 147.185.221.20:14939 z-cv.gl.at.ply.gg tcp
US 147.185.221.20:14939 z-cv.gl.at.ply.gg tcp
US 147.185.221.20:14939 z-cv.gl.at.ply.gg tcp

Files

memory/2940-0-0x000007FEF5E43000-0x000007FEF5E44000-memory.dmp

memory/2940-1-0x00000000009E0000-0x00000000009F8000-memory.dmp

memory/2940-2-0x000007FEF5E40000-0x000007FEF682C000-memory.dmp

memory/2596-7-0x000000001B6E0000-0x000000001B9C2000-memory.dmp

memory/2596-8-0x0000000001E80000-0x0000000001E88000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

MD5 afd7853e55753b28890f2db2e7df5226
SHA1 903827cc5f8f07fa1eaaa6df051ab3c13c401ec9
SHA256 eb4cab8a227c1ee19bf742bb9cb25dc66020c1b1205a6c27077a9250d83b39fe
SHA512 30895ac6e6571436f9b483779ddd00bb523d1bb7dfeff8e3d09df2f0699c179b5c937ba32eecb3b4f3aff76b9d9252a1f95fb57edf8320184ee8f1611ff53ee9

memory/2636-14-0x000000001B650000-0x000000001B932000-memory.dmp

memory/2636-15-0x0000000001F40000-0x0000000001F48000-memory.dmp

\??\PIPE\srvsvc

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

memory/2940-31-0x000007FEF5E43000-0x000007FEF5E44000-memory.dmp

memory/2940-32-0x000007FEF5E40000-0x000007FEF682C000-memory.dmp