xworm | 00956e3a55867b348d29da5f04cf6fb51e85872389ce6dc5f4015a958c575fb3

Analysis

max time kernel
128s
max time network
146s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
04/11/2024, 16:44

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General

Target
mygame.exe
Size 137KB
Sample241104-t835sswlan
SHA256 00956e3a55867b348d29da5f04cf6fb51e85872389ce6dc5f4015a958c575fb3
MD5 1a925fce50787a5028b73dd32e0c7dce
SHA1 7205d5c3d7efbc5805eb0b343a1bc83903e7589c
SHA512 ceec3fa381bbcb32fb520b876fac67defc2712fcf7dcbf4a69d50a227c8f81f1cbb3aac03fc0f2ac007105b9b378c5a1c405ec2b326bf284795c0ae0e85d93a8
SSDEEP 3072:6fjh7Fv9fjOwiBz65/M6If+3Js+3JFkKeTno:8hJv9AxBt25
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

147.185.221.23:48450

Mutex

2YsFPOHVMLfmF9px

Attributes

Install_directory
%AppData%
install_file
Update.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral4/memory/4680-1-0x0000000000060000-0x0000000000088000-memory.dmp	family_xworm
behavioral4/files/0x002c000000045102-60.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1912	powershell.exe
1988	powershell.exe
2292	powershell.exe
1748	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3785588363-1079601362-4184885025-1000\Control Panel\International\Geo\Nation	mygame.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Update.lnk	mygame.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Update.lnk	mygame.exe

Executes dropped EXE 2 IoCs

pid	Process
3692	Update.exe
2120	Update.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3785588363-1079601362-4184885025-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Update = "C:\\Users\\Admin\\AppData\\Roaming\\Update.exe"	mygame.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1988	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4256	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1912	powershell.exe
1912	powershell.exe
1988	powershell.exe
1988	powershell.exe
2292	powershell.exe
2292	powershell.exe
1748	powershell.exe
1748	powershell.exe
4680	mygame.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4680	mygame.exe
Token: SeDebugPrivilege	1912	powershell.exe
Token: SeIncreaseQuotaPrivilege	1912	powershell.exe
Token: SeSecurityPrivilege	1912	powershell.exe
Token: SeTakeOwnershipPrivilege	1912	powershell.exe
Token: SeLoadDriverPrivilege	1912	powershell.exe
Token: SeSystemProfilePrivilege	1912	powershell.exe
Token: SeSystemtimePrivilege	1912	powershell.exe
Token: SeProfSingleProcessPrivilege	1912	powershell.exe
Token: SeIncBasePriorityPrivilege	1912	powershell.exe
Token: SeCreatePagefilePrivilege	1912	powershell.exe
Token: SeBackupPrivilege	1912	powershell.exe
Token: SeRestorePrivilege	1912	powershell.exe
Token: SeShutdownPrivilege	1912	powershell.exe
Token: SeDebugPrivilege	1912	powershell.exe
Token: SeSystemEnvironmentPrivilege	1912	powershell.exe
Token: SeRemoteShutdownPrivilege	1912	powershell.exe
Token: SeUndockPrivilege	1912	powershell.exe
Token: SeManageVolumePrivilege	1912	powershell.exe
Token: 33	1912	powershell.exe
Token: 34	1912	powershell.exe
Token: 35	1912	powershell.exe
Token: 36	1912	powershell.exe
Token: SeDebugPrivilege	1988	powershell.exe
Token: SeIncreaseQuotaPrivilege	1988	powershell.exe
Token: SeSecurityPrivilege	1988	powershell.exe
Token: SeTakeOwnershipPrivilege	1988	powershell.exe
Token: SeLoadDriverPrivilege	1988	powershell.exe
Token: SeSystemProfilePrivilege	1988	powershell.exe
Token: SeSystemtimePrivilege	1988	powershell.exe
Token: SeProfSingleProcessPrivilege	1988	powershell.exe
Token: SeIncBasePriorityPrivilege	1988	powershell.exe
Token: SeCreatePagefilePrivilege	1988	powershell.exe
Token: SeBackupPrivilege	1988	powershell.exe
Token: SeRestorePrivilege	1988	powershell.exe
Token: SeShutdownPrivilege	1988	powershell.exe
Token: SeDebugPrivilege	1988	powershell.exe
Token: SeSystemEnvironmentPrivilege	1988	powershell.exe
Token: SeRemoteShutdownPrivilege	1988	powershell.exe
Token: SeUndockPrivilege	1988	powershell.exe
Token: SeManageVolumePrivilege	1988	powershell.exe
Token: 33	1988	powershell.exe
Token: 34	1988	powershell.exe
Token: 35	1988	powershell.exe
Token: 36	1988	powershell.exe
Token: SeDebugPrivilege	2292	powershell.exe
Token: SeIncreaseQuotaPrivilege	2292	powershell.exe
Token: SeSecurityPrivilege	2292	powershell.exe
Token: SeTakeOwnershipPrivilege	2292	powershell.exe
Token: SeLoadDriverPrivilege	2292	powershell.exe
Token: SeSystemProfilePrivilege	2292	powershell.exe
Token: SeSystemtimePrivilege	2292	powershell.exe
Token: SeProfSingleProcessPrivilege	2292	powershell.exe
Token: SeIncBasePriorityPrivilege	2292	powershell.exe
Token: SeCreatePagefilePrivilege	2292	powershell.exe
Token: SeBackupPrivilege	2292	powershell.exe
Token: SeRestorePrivilege	2292	powershell.exe
Token: SeShutdownPrivilege	2292	powershell.exe
Token: SeDebugPrivilege	2292	powershell.exe
Token: SeSystemEnvironmentPrivilege	2292	powershell.exe
Token: SeRemoteShutdownPrivilege	2292	powershell.exe
Token: SeUndockPrivilege	2292	powershell.exe
Token: SeManageVolumePrivilege	2292	powershell.exe
Token: 33	2292	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4680	mygame.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4680 wrote to memory of 1912	4680	mygame.exe	84
PID 4680 wrote to memory of 1912	4680	mygame.exe	84
PID 4680 wrote to memory of 1988	4680	mygame.exe	89
PID 4680 wrote to memory of 1988	4680	mygame.exe	89
PID 4680 wrote to memory of 2292	4680	mygame.exe	93
PID 4680 wrote to memory of 2292	4680	mygame.exe	93
PID 4680 wrote to memory of 1748	4680	mygame.exe	95
PID 4680 wrote to memory of 1748	4680	mygame.exe	95
PID 4680 wrote to memory of 4256	4680	mygame.exe	97
PID 4680 wrote to memory of 4256	4680	mygame.exe	97
PID 4680 wrote to memory of 4516	4680	mygame.exe	106
PID 4680 wrote to memory of 4516	4680	mygame.exe	106
PID 4680 wrote to memory of 2236	4680	mygame.exe	108
PID 4680 wrote to memory of 2236	4680	mygame.exe	108
PID 2236 wrote to memory of 1988	2236	cmd.exe	110
PID 2236 wrote to memory of 1988	2236	cmd.exe	110

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\mygame.exe
"C:\Users\Admin\AppData\Local\Temp\mygame.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4680
- 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\mygame.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1912
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'mygame.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1988
- 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\Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2292
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:1748
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Update" /tr "C:\Users\Admin\AppData\Roaming\Update.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4256
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /delete /f /tn "Update"
  2⤵
  PID:4516
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA426.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2236
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1988

C:\Users\Admin\AppData\Roaming\Update.exe
"C:\Users\Admin\AppData\Roaming\Update.exe"
1⤵
- Executes dropped EXE
PID:3692

C:\Users\Admin\AppData\Roaming\Update.exe
"C:\Users\Admin\AppData\Roaming\Update.exe"
1⤵
- Executes dropped EXE
PID:2120

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Update.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Update.exe.log
Size 654B
SHA256 d39a78fabca39532fcb85ce908781a75132e1bd01cc50a3b290dd87127837d63
MD5 11c6e74f0561678d2cf7fc075a6cc00c
SHA1 535ee79ba978554abcb98c566235805e7ea18490
SHA512 32c63d67bf512b42e7f57f71287b354200126cb417ef9d869c72e0b9388a7c2f5e3b61f303f1353baa1bf482d0f17e06e23c9f50b2f1babd4d958b6da19c40b0
MD5 SHA1 SHA512

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powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 3KB
SHA256 c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485
MD5 3eb3833f769dd890afc295b977eab4b4
SHA1 e857649b037939602c72ad003e5d3698695f436f
SHA512 c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 63082da456c124d0bc516d2161d1613db5f3008d903e4066d2c7b4e90b435f33
MD5 c67441dfa09f61bca500bb43407c56b8
SHA1 5a56cf7cbeb48c109e2128c31b681fac3959157b
SHA512 325de8b718b3a01df05e20e028c5882240e5fd2e96c771361b776312923ff178f27494a1f5249bf6d7365a99155eb8735a51366e85597008e6a10462e63ee0e8
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 58a60303e70cebc1c567d325318bcc407d549ead264571879cdc48b8d3ad5163
MD5 479734f81afd78af97943b0eff7278b6
SHA1 426eb393a201186057a89b88fee2ed07867b8ed8
SHA512 9ac621439c126195355a2483506a4271018f652b225e17fe5d1494bec36ca94164fde045bd7ea49bd3ad4e6cd08773cd93f997eea9fec92993985aa1881c49da
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 493f371c53beed7a2c310f89971b4d7125034ba7667da8d20eb5d15966c0efa6
MD5 7d910b944b9006d8577e22c4a5095b6c
SHA1 62d2c12a62326be24278b274d71abb85df50b156
SHA512 cf0327cbebf6a0ef2194124b28f574c996f3c4d46892eeb51b60d1ca8ab0ac8e412dbf121d114aa3463b4b62b19d4d2f27784b78927c96608544ba2238f917fc
MD5 SHA1 SHA512

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__PSScriptPolicyTest_r2hbqyde.2gp.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_r2hbqyde.2gp.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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tmpA426.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpA426.tmp.bat
Size 158B
SHA256 dc26a8c603c2dc2f9b32a0331b87e47ac38039e6d27cbb21abef0ccbaf85959d
MD5 8332e41c6025352be830e33f7f3737bf
SHA1 f47eb779cd3cdf35cad8eedbd11e2cc25e2bf06d
SHA512 3781f92445493fb9313ccdf75de79ed7bac825ba8455c9ef7c35c065fe188110af5438aaf1391feb31f158673475f1ff1285ce3749ebfbb3a07e9ee62464a1c1
MD5 SHA1 SHA512

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Update.exe

Path C:\Users\Admin\AppData\Roaming\Update.exe
Size 137KB
SHA256 00956e3a55867b348d29da5f04cf6fb51e85872389ce6dc5f4015a958c575fb3
MD5 1a925fce50787a5028b73dd32e0c7dce
SHA1 7205d5c3d7efbc5805eb0b343a1bc83903e7589c
SHA512 ceec3fa381bbcb32fb520b876fac67defc2712fcf7dcbf4a69d50a227c8f81f1cbb3aac03fc0f2ac007105b9b378c5a1c405ec2b326bf284795c0ae0e85d93a8
SSDEEP 3072:6fjh7Fv9fjOwiBz65/M6If+3Js+3JFkKeTno:8hJv9AxBt25
MD5 SHA1 SHA512 SSDEEP

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memory/1912-13-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

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memory/1912-19-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

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memory/1912-16-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

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memory/1912-15-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

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memory/1912-14-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

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memory/1912-12-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

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memory/1912-11-0x000002667AEA0000-0x000002667AEC2000-memory.dmp

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memory/4680-0-0x00007FFD8F9F3000-0x00007FFD8F9F5000-memory.dmp

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memory/4680-58-0x00007FFD8F9F3000-0x00007FFD8F9F5000-memory.dmp

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memory/4680-59-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

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memory/4680-62-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

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memory/4680-1-0x0000000000060000-0x0000000000088000-memory.dmp

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memory/4680-72-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

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