xworm | 40fff95bc182b81bfb0b049173013de54c8576e6ea4e5b41083cbb9c0e1f1c9d

Analysis

max time kernel
144s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
07/06/2024, 03:16

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General

Target
XClient.exe
Size 72KB
Sample240607-dsrttsgg9s
SHA256 40fff95bc182b81bfb0b049173013de54c8576e6ea4e5b41083cbb9c0e1f1c9d
MD5 4cdea92da70cbf4c2ffca456c3883d00
SHA1 18af59e882c21c3aa581a58d2e5cb0fc9c620738
SHA512 68ccc4add5e604f757eb779b1ff8608bbececb0e7b8b2d8b143654fe2e0b67cb6f547d638763b64468fa1c2f663cd68b25c27134f3792bdad48176b00f79f75f
SSDEEP 1536:JjAaGQbpJGBJXx6rX24JHjbY/5bOyNyhFJ6GmOBwTjLqc:JjAanbqnxa5bY/15uGOWTqc
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

learning-gays.gl.at.ply.gg:25955

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/1436-1-0x0000000000570000-0x0000000000588000-memory.dmp	family_xworm
behavioral2/files/0x0009000000022ac0-57.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
2792	powershell.exe
4968	powershell.exe
2140	powershell.exe
1160	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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
4104	XClient.exe
4384	XClient.exe
4032	XClient.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-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.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
22	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
4436	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4968	powershell.exe
4968	powershell.exe
2140	powershell.exe
2140	powershell.exe
1160	powershell.exe
1160	powershell.exe
2792	powershell.exe
2792	powershell.exe
1436	XClient.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	1436	XClient.exe
Token: SeDebugPrivilege	4968	powershell.exe
Token: SeDebugPrivilege	2140	powershell.exe
Token: SeDebugPrivilege	1160	powershell.exe
Token: SeDebugPrivilege	2792	powershell.exe
Token: SeDebugPrivilege	1436	XClient.exe
Token: SeDebugPrivilege	4104	XClient.exe
Token: SeDebugPrivilege	4384	XClient.exe
Token: SeDebugPrivilege	4032	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1436	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1436 wrote to memory of 4968	1436	XClient.exe	89
PID 1436 wrote to memory of 4968	1436	XClient.exe	89
PID 1436 wrote to memory of 2140	1436	XClient.exe	94
PID 1436 wrote to memory of 2140	1436	XClient.exe	94
PID 1436 wrote to memory of 1160	1436	XClient.exe	96
PID 1436 wrote to memory of 1160	1436	XClient.exe	96
PID 1436 wrote to memory of 2792	1436	XClient.exe	98
PID 1436 wrote to memory of 2792	1436	XClient.exe	98
PID 1436 wrote to memory of 4436	1436	XClient.exe	100
PID 1436 wrote to memory of 4436	1436	XClient.exe	100

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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.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:1436
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4968
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2140
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1160
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2792
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Creates scheduled task(s)
  PID:4436

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4104

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4384

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4032

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

XClient.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\XClient.exe.log
Size 654B
SHA256 e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
MD5 2ff39f6c7249774be85fd60a8f9a245e
SHA1 684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA512 1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1
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 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45
MD5 d28a889fd956d5cb3accfbaf1143eb6f
SHA1 157ba54b365341f8ff06707d996b3635da8446f7
SHA512 0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 c88e4bbb64f7fa31429ebe82c1cf07785c44486f37576f783a26ac856e02a4eb
MD5 9bc110200117a3752313ca2acaf8a9e1
SHA1 fda6b7da2e7b0175b391475ca78d1b4cf2147cd3
SHA512 1f1af32aa18a8cbfcc65b0d4fb7e6ca2705f125eaa85789e981ee68b90c64522e954825abf460d4b4f97567715dfae8d9b0a25a4d54d10bc4c257c472f2e80fb
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 77a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5
MD5 da5c82b0e070047f7377042d08093ff4
SHA1 89d05987cd60828cca516c5c40c18935c35e8bd3
SHA512 7360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b
MD5 SHA1 SHA512

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__PSScriptPolicyTest_4clbgspd.15e.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4clbgspd.15e.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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XClient.exe

Path C:\Users\Admin\AppData\Roaming\XClient.exe
Size 72KB
SHA256 40fff95bc182b81bfb0b049173013de54c8576e6ea4e5b41083cbb9c0e1f1c9d
MD5 4cdea92da70cbf4c2ffca456c3883d00
SHA1 18af59e882c21c3aa581a58d2e5cb0fc9c620738
SHA512 68ccc4add5e604f757eb779b1ff8608bbececb0e7b8b2d8b143654fe2e0b67cb6f547d638763b64468fa1c2f663cd68b25c27134f3792bdad48176b00f79f75f
SSDEEP 1536:JjAaGQbpJGBJXx6rX24JHjbY/5bOyNyhFJ6GmOBwTjLqc:JjAanbqnxa5bY/15uGOWTqc
MD5 SHA1 SHA512 SSDEEP

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memory/1436-1-0x0000000000570000-0x0000000000588000-memory.dmp

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memory/1436-2-0x00007FF816410000-0x00007FF816ED1000-memory.dmp

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memory/1436-0-0x00007FF816413000-0x00007FF816415000-memory.dmp

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memory/1436-61-0x00007FF816410000-0x00007FF816ED1000-memory.dmp

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memory/1436-59-0x00007FF816413000-0x00007FF816415000-memory.dmp

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memory/4968-4-0x00007FF816410000-0x00007FF816ED1000-memory.dmp

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memory/4968-18-0x00007FF816410000-0x00007FF816ED1000-memory.dmp

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memory/4968-15-0x000001C6F3F90000-0x000001C6F3FB2000-memory.dmp

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memory/4968-5-0x00007FF816410000-0x00007FF816ED1000-memory.dmp

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memory/4968-3-0x00007FF816410000-0x00007FF816ED1000-memory.dmp

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