Malware Analysis Report

2024-11-16 13:29

Sample ID 240621-f1ynfsyfqe
Target Update.exe
SHA256 bdc5e4f0f493af0faa6baf521c534ad15a64ff3fa3dc616ce89c2ef623ebc84c
Tags
xworm execution persistence rat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

bdc5e4f0f493af0faa6baf521c534ad15a64ff3fa3dc616ce89c2ef623ebc84c

Threat Level: Known bad

The file Update.exe was found to be: Known bad.

Malicious Activity Summary

xworm execution persistence rat trojan

Detect Xworm Payload

Xworm

Xworm family

Command and Scripting Interpreter: PowerShell

Executes dropped EXE

Checks computer location settings

Drops startup file

Looks up external IP address via web service

Adds Run key to start application

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Uses Task Scheduler COM API

Scheduled Task/Job: Scheduled Task

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-21 05:20

Signatures

Detect Xworm Payload

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: behavioral1

Detonation Overview

Submitted

2024-06-21 05:20

Reported

2024-06-21 05:23

Platform

win7-20240221-en

Max time kernel

146s

Max time network

150s

Command Line

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

Signatures

Detect Xworm Payload

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

Xworm

trojan rat xworm

Drops startup file

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\Update.exe N/A
N/A N/A C:\ProgramData\Update.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\Update = "C:\\ProgramData\\Update.exe" C:\Users\Admin\AppData\Local\Temp\Update.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

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Update.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Update.exe N/A
Token: SeDebugPrivilege N/A C:\ProgramData\Update.exe N/A
Token: SeDebugPrivilege N/A C:\ProgramData\Update.exe N/A

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 880 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\Update.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 880 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\Update.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 880 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\Update.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 880 wrote to memory of 2436 N/A C:\Users\Admin\AppData\Local\Temp\Update.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 880 wrote to memory of 2436 N/A C:\Users\Admin\AppData\Local\Temp\Update.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 880 wrote to memory of 2436 N/A C:\Users\Admin\AppData\Local\Temp\Update.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 880 wrote to memory of 2472 N/A C:\Users\Admin\AppData\Local\Temp\Update.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 880 wrote to memory of 2472 N/A C:\Users\Admin\AppData\Local\Temp\Update.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 880 wrote to memory of 2472 N/A C:\Users\Admin\AppData\Local\Temp\Update.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 880 wrote to memory of 2936 N/A C:\Users\Admin\AppData\Local\Temp\Update.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 880 wrote to memory of 2936 N/A C:\Users\Admin\AppData\Local\Temp\Update.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 880 wrote to memory of 2936 N/A C:\Users\Admin\AppData\Local\Temp\Update.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 880 wrote to memory of 2900 N/A C:\Users\Admin\AppData\Local\Temp\Update.exe C:\Windows\System32\schtasks.exe
PID 880 wrote to memory of 2900 N/A C:\Users\Admin\AppData\Local\Temp\Update.exe C:\Windows\System32\schtasks.exe
PID 880 wrote to memory of 2900 N/A C:\Users\Admin\AppData\Local\Temp\Update.exe C:\Windows\System32\schtasks.exe
PID 1284 wrote to memory of 2132 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\Update.exe
PID 1284 wrote to memory of 2132 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\Update.exe
PID 1284 wrote to memory of 2132 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\Update.exe
PID 1284 wrote to memory of 276 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\Update.exe
PID 1284 wrote to memory of 276 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\Update.exe
PID 1284 wrote to memory of 276 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\Update.exe

Uses Task Scheduler COM API

persistence

Processes

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

"C:\Users\Admin\AppData\Local\Temp\Update.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\Update.exe'

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

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

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\Update.exe'

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

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

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Update" /tr "C:\ProgramData\Update.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {21DDB047-B025-4113-A388-53F920F0648F} S-1-5-21-1298544033-3225604241-2703760938-1000:IZKCKOTP\Admin:Interactive:[1]

C:\ProgramData\Update.exe

C:\ProgramData\Update.exe

C:\ProgramData\Update.exe

C:\ProgramData\Update.exe

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 different-albuquerque.gl.at.ply.gg udp
US 147.185.221.19:9044 different-albuquerque.gl.at.ply.gg tcp
US 147.185.221.19:9044 different-albuquerque.gl.at.ply.gg tcp
US 147.185.221.19:9044 different-albuquerque.gl.at.ply.gg tcp
US 147.185.221.19:9044 different-albuquerque.gl.at.ply.gg tcp
US 147.185.221.19:9044 different-albuquerque.gl.at.ply.gg tcp
US 147.185.221.19:9044 different-albuquerque.gl.at.ply.gg tcp

Files

memory/880-0-0x000007FEF5D73000-0x000007FEF5D74000-memory.dmp

memory/880-1-0x0000000000130000-0x000000000014A000-memory.dmp

memory/880-2-0x000007FEF5D70000-0x000007FEF675C000-memory.dmp

memory/2628-7-0x0000000002960000-0x00000000029E0000-memory.dmp

memory/2628-8-0x000000001B6C0000-0x000000001B9A2000-memory.dmp

memory/2628-9-0x00000000021D0000-0x00000000021D8000-memory.dmp

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

MD5 7662c50708406506f1949b1561a4e94d
SHA1 6ca1fcb8ea42e90b1ec96476d3e700faa2f98f04
SHA256 358a88c9d3e5ecce135fd936cbc587fdb0a8d578cd2a689a323b20cdebf9d5f0
SHA512 57241d95973998a3495bfc22bea2fd22ad23de9fab458ffd828d8891f78eb4c9e266e6ea2057e0380dded9d9a5e62c1413ee3c14c4aa1bd65a403801a9762cc3

memory/2436-15-0x000000001B680000-0x000000001B962000-memory.dmp

memory/2436-16-0x00000000027A0000-0x00000000027A8000-memory.dmp

memory/880-31-0x000007FEF5D73000-0x000007FEF5D74000-memory.dmp

memory/880-32-0x000007FEF5D70000-0x000007FEF675C000-memory.dmp

C:\ProgramData\Update.exe

MD5 7d612f510225b0406e373c0e54e1673b
SHA1 fab0e06ee2a9eb6b124b248b28cc490f849acb6b
SHA256 bdc5e4f0f493af0faa6baf521c534ad15a64ff3fa3dc616ce89c2ef623ebc84c
SHA512 48c7f7a87b2d5c475366effa9eece01b6b9b8bf506a81380971d81c57035513d21637cb8fb5da69c8396b0248b5a5b72d10e85adb3231e0e1c8210fc09ac3b91

memory/2132-36-0x0000000000310000-0x000000000032A000-memory.dmp

memory/276-39-0x0000000000100000-0x000000000011A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-21 05:20

Reported

2024-06-21 05:23

Platform

win10v2004-20240611-en

Max time kernel

149s

Max time network

151s

Command Line

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

Signatures

Detect Xworm Payload

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

Xworm

trojan rat xworm

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2080292272-204036150-2159171770-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\Update.exe N/A

Drops startup file

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\Update.exe N/A
N/A N/A C:\ProgramData\Update.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2080292272-204036150-2159171770-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Update = "C:\\ProgramData\\Update.exe" C:\Users\Admin\AppData\Local\Temp\Update.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

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Update.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Update.exe N/A
Token: SeDebugPrivilege N/A C:\ProgramData\Update.exe N/A
Token: SeDebugPrivilege N/A C:\ProgramData\Update.exe N/A

Suspicious use of SetWindowsHookEx

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

Uses Task Scheduler COM API

persistence

Processes

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

"C:\Users\Admin\AppData\Local\Temp\Update.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\Update.exe'

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

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

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\Update.exe'

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

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

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Update" /tr "C:\ProgramData\Update.exe"

C:\ProgramData\Update.exe

C:\ProgramData\Update.exe

C:\ProgramData\Update.exe

C:\ProgramData\Update.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 203.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.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 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 different-albuquerque.gl.at.ply.gg udp
US 147.185.221.19:9044 different-albuquerque.gl.at.ply.gg tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 92.12.20.2.in-addr.arpa udp
US 147.185.221.19:9044 different-albuquerque.gl.at.ply.gg tcp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 147.185.221.19:9044 different-albuquerque.gl.at.ply.gg tcp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 147.185.221.19:9044 different-albuquerque.gl.at.ply.gg tcp
US 147.185.221.19:9044 different-albuquerque.gl.at.ply.gg tcp
US 8.8.8.8:53 66.112.168.52.in-addr.arpa udp

Files

memory/2952-0-0x00007FFB65F33000-0x00007FFB65F35000-memory.dmp

memory/2952-1-0x0000000000F40000-0x0000000000F5A000-memory.dmp

memory/2952-2-0x00007FFB65F30000-0x00007FFB669F1000-memory.dmp

memory/5072-12-0x00000217D5420000-0x00000217D5442000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_omiwuzg5.asa.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/5072-13-0x00007FFB65F30000-0x00007FFB669F1000-memory.dmp

memory/5072-14-0x00007FFB65F30000-0x00007FFB669F1000-memory.dmp

memory/5072-15-0x00007FFB65F30000-0x00007FFB669F1000-memory.dmp

memory/5072-18-0x00007FFB65F30000-0x00007FFB669F1000-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 bd5940f08d0be56e65e5f2aaf47c538e
SHA1 d7e31b87866e5e383ab5499da64aba50f03e8443
SHA256 2d2f364c75bd2897504249f42cdf1d19374f5230aad68fa9154ea3d03e3031a6
SHA512 c34d10c7e07da44a180fae9889b61f08903aa84e8ddfa80c31c272b1ef9d491b8cec6b8a4c836c3cb1583fe8f4955c6a8db872515de3a9e10eae09610c959406

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

MD5 f78784cbba78ae56c996ca2823645ee1
SHA1 fd149b7959a37af06079b147cf187f72c9b3b57a
SHA256 24667f855535191c682e6e9e11a4a1d77c4bbadda4b5d501873168fd3a7ddac7
SHA512 f86636453a346932a4076575cc2e3a9a157f50eed3bf23510be60be6b3ed204cb22b99c840343e6132454a8d78f5b33b53ed71e2c426caf7300ebdd697263afd

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

MD5 da5c82b0e070047f7377042d08093ff4
SHA1 89d05987cd60828cca516c5c40c18935c35e8bd3
SHA256 77a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5
SHA512 7360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b

memory/2952-57-0x00007FFB65F33000-0x00007FFB65F35000-memory.dmp

memory/2952-58-0x00007FFB65F30000-0x00007FFB669F1000-memory.dmp

C:\ProgramData\Update.exe

MD5 7d612f510225b0406e373c0e54e1673b
SHA1 fab0e06ee2a9eb6b124b248b28cc490f849acb6b
SHA256 bdc5e4f0f493af0faa6baf521c534ad15a64ff3fa3dc616ce89c2ef623ebc84c
SHA512 48c7f7a87b2d5c475366effa9eece01b6b9b8bf506a81380971d81c57035513d21637cb8fb5da69c8396b0248b5a5b72d10e85adb3231e0e1c8210fc09ac3b91

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

MD5 2ff39f6c7249774be85fd60a8f9a245e
SHA1 684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA256 e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
SHA512 1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1