xworm | 675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a

Analysis

max time kernel
131s
max time network
142s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
28/05/2024, 22:08

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General

Target
675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe
Size 80KB
Sample240528-119e6sec9s
SHA256 675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a
MD5 bb1529af37bcc44a4d65ee8da4ab05be
SHA1 2e0e4ddd78ff20ec2de8fb8993a0649cabfeedd2
SHA512 2a8fb12264df2f6bdf272fa585e2b5b27829e9f96813a5d349da2a7c8348cd3eb9097f5d10f3320f1ab192041d0274cd2ac4c0d9bcd0d716e33f1dc6162baf7b
SSDEEP 1536:Gmc2zu/kU4Nl5jZnttCahWtrbazbwq6Kciw6VaZwYVg/VOZO6Kmi80:GmcT8UEntH4trbaYhKc8OZxK+0
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

82.147.85.135:7000

Attributes

Install_directory
%AppData%
install_file
svhost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/412-1-0x0000000000D40000-0x0000000000D5A000-memory.dmp	family_xworm
behavioral2/files/0x000b00000002a99b-57.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
1612	powershell.exe
4012	powershell.exe
1192	powershell.exe
808	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svhost.lnk	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svhost.lnk	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe

Executes dropped EXE 2 IoCs

pid	Process
2396	svhost.exe
5020	svhost.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-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Windows\CurrentVersion\Run\svhost = "C:\\Users\\Admin\\AppData\\Roaming\\svhost.exe"	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
1	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2900	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
412	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1612	powershell.exe
1612	powershell.exe
4012	powershell.exe
4012	powershell.exe
1192	powershell.exe
1192	powershell.exe
808	powershell.exe
808	powershell.exe
412	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	412	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe
Token: SeDebugPrivilege	1612	powershell.exe
Token: SeDebugPrivilege	4012	powershell.exe
Token: SeDebugPrivilege	1192	powershell.exe
Token: SeDebugPrivilege	808	powershell.exe
Token: SeDebugPrivilege	412	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe
Token: SeDebugPrivilege	2396	svhost.exe
Token: SeDebugPrivilege	5020	svhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
412	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 412 wrote to memory of 1612	412	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe	79
PID 412 wrote to memory of 1612	412	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe	79
PID 412 wrote to memory of 4012	412	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe	81
PID 412 wrote to memory of 4012	412	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe	81
PID 412 wrote to memory of 1192	412	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe	83
PID 412 wrote to memory of 1192	412	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe	83
PID 412 wrote to memory of 808	412	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe	85
PID 412 wrote to memory of 808	412	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe	85
PID 412 wrote to memory of 2900	412	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe	87
PID 412 wrote to memory of 2900	412	675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe	87

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\675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe
"C:\Users\Admin\AppData\Local\Temp\675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:412
- 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\675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1612
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4012
- 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\svhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1192
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:808
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svhost" /tr "C:\Users\Admin\AppData\Roaming\svhost.exe"
  2⤵
  - Creates scheduled task(s)
  PID:2900

C:\Users\Admin\AppData\Roaming\svhost.exe
C:\Users\Admin\AppData\Roaming\svhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2396

C:\Users\Admin\AppData\Roaming\svhost.exe
C:\Users\Admin\AppData\Roaming\svhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

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

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c
MD5 627073ee3ca9676911bee35548eff2b8
SHA1 4c4b68c65e2cab9864b51167d710aa29ebdcff2e
SHA512 3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb
MD5 SHA1 SHA512

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svhost.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\svhost.exe.log
Size 654B
SHA256 e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3
MD5 2cbbb74b7da1f720b48ed31085cbd5b8
SHA1 79caa9a3ea8abe1b9c4326c3633da64a5f724964
SHA512 ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 21942e513f223fdad778348fbb20617dd29f986bccd87824c0ae7f15649f3f31
MD5 d0a4a3b9a52b8fe3b019f6cd0ef3dad6
SHA1 fed70ce7834c3b97edbd078eccda1e5effa527cd
SHA512 1a66f837b4e7fb6346d0500aeacb44902fb8a239bce23416271263eba46fddae58a17075e188ae43eb516c841e02c87e32ebd73256c7cc2c0713d00c35f1761b
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 6651e5f976619cef991deef61776cf43d4c4b3d7c551dd2192b647df71586ab0
MD5 80707036df540b6657f9d443b449e3c3
SHA1 b3e7d5d97274942164bf93c8c4b8a9b68713f46f
SHA512 65e41e9e730fed4f7a7d3f6f35875a16948b897f87c8c70b371fd0ac7f0951814f6a75e7698665194bbc65a3665a684e7be229e7e24193b50483ae7e55eebf4f
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 34b95e4d12196f68f7a030b98190fda89c34b696251ab9ed831e48d983896898
MD5 34c8b93dd58a4703db0d6dd86bb21d70
SHA1 b53aa49b882070b857951b6638d6da3a03ac2f56
SHA512 bba4a86b8a66104ed21fd58717168cdf68b93c801a94ec65e25c2b66c1b9354b9e7c1c01cadde451948e072d96c3fa4994c94ef33aeff9b603e7b5d82f7111e7
MD5 SHA1 SHA512

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__PSScriptPolicyTest_5pot344v.3de.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5pot344v.3de.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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svhost.exe

Path C:\Users\Admin\AppData\Roaming\svhost.exe
Size 80KB
SHA256 675904e6ddfe4d5801da49bb4935fc71859e4edf5879a8c173f1f7df35c3970a
MD5 bb1529af37bcc44a4d65ee8da4ab05be
SHA1 2e0e4ddd78ff20ec2de8fb8993a0649cabfeedd2
SHA512 2a8fb12264df2f6bdf272fa585e2b5b27829e9f96813a5d349da2a7c8348cd3eb9097f5d10f3320f1ab192041d0274cd2ac4c0d9bcd0d716e33f1dc6162baf7b
SSDEEP 1536:Gmc2zu/kU4Nl5jZnttCahWtrbazbwq6Kciw6VaZwYVg/VOZO6Kmi80:GmcT8UEntH4trbaYhKc8OZxK+0
MD5 SHA1 SHA512 SSDEEP

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memory/412-1-0x0000000000D40000-0x0000000000D5A000-memory.dmp

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memory/412-2-0x00007FFEDA370000-0x00007FFEDAE32000-memory.dmp

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memory/412-0-0x00007FFEDA373000-0x00007FFEDA375000-memory.dmp

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memory/412-55-0x00007FFEDA370000-0x00007FFEDAE32000-memory.dmp

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memory/1612-4-0x00007FFEDA370000-0x00007FFEDAE32000-memory.dmp

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memory/1612-19-0x00007FFEDA370000-0x00007FFEDAE32000-memory.dmp

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memory/1612-16-0x00007FFEDA370000-0x00007FFEDAE32000-memory.dmp

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memory/1612-15-0x00007FFEDA370000-0x00007FFEDAE32000-memory.dmp

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memory/1612-11-0x000002007BC90000-0x000002007BCB2000-memory.dmp

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memory/1612-5-0x00007FFEDA370000-0x00007FFEDAE32000-memory.dmp

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memory/1612-3-0x00007FFEDA370000-0x00007FFEDAE32000-memory.dmp

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