xworm | 14fc945249c10349174b83ae6330d19a8621f2a65ba69a54b2b923bf96933c3e

Analysis

max time kernel
170s
max time network
145s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
11/06/2024, 04:27

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General

Target
XClient.exe
Size 74KB
Sample240611-e3l7rsvdnq
SHA256 14fc945249c10349174b83ae6330d19a8621f2a65ba69a54b2b923bf96933c3e
MD5 98f79018890d5b65e153e9d3082b024b
SHA1 2fa9e5abbc16d656d4dafa036af9a29e83fe9304
SHA512 d3599c1f5b09d26328469a0011dd61fbb9560fd851a1e47ab14cc5bc20ab28012f60eda0cce07be6ad1e22d8ff3012221ddf9c64f0a08dc52683744852e456cf
SSDEEP 1536:Qz2TVwZ+XVb6MIOkbpl9ZyhV956KMzNOfK5N5bR44:Qz2pXlb6YkbpUV9ZkNOgtu4
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

association-bowl.gl.at.ply.gg:32006

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2248-1-0x0000000000220000-0x0000000000238000-memory.dmp	family_xworm
behavioral1/files/0x0009000000012120-34.dat	family_xworm
behavioral1/memory/836-36-0x0000000000990000-0x00000000009A8000-memory.dmp	family_xworm
behavioral1/memory/2740-41-0x0000000001310000-0x0000000001328000-memory.dmp	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
2612	powershell.exe
2828	powershell.exe
2380	powershell.exe
2452	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
836	svchost.exe
3004	svchost.exe
2740	svchost.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-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.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
4	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
2552	schtasks.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2612	powershell.exe
2828	powershell.exe
2380	powershell.exe
2452	powershell.exe
2248	XClient.exe
2248	XClient.exe
2248	XClient.exe
2248	XClient.exe
2248	XClient.exe
2248	XClient.exe
2248	XClient.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2248	XClient.exe
Token: SeDebugPrivilege	2612	powershell.exe
Token: SeDebugPrivilege	2828	powershell.exe
Token: SeDebugPrivilege	2380	powershell.exe
Token: SeDebugPrivilege	2452	powershell.exe
Token: SeDebugPrivilege	2248	XClient.exe
Token: SeDebugPrivilege	836	svchost.exe
Token: SeDebugPrivilege	3004	svchost.exe
Token: SeDebugPrivilege	2740	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2248	XClient.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2248 wrote to memory of 2612	2248	XClient.exe	29
PID 2248 wrote to memory of 2612	2248	XClient.exe	29
PID 2248 wrote to memory of 2612	2248	XClient.exe	29
PID 2248 wrote to memory of 2828	2248	XClient.exe	31
PID 2248 wrote to memory of 2828	2248	XClient.exe	31
PID 2248 wrote to memory of 2828	2248	XClient.exe	31
PID 2248 wrote to memory of 2380	2248	XClient.exe	33
PID 2248 wrote to memory of 2380	2248	XClient.exe	33
PID 2248 wrote to memory of 2380	2248	XClient.exe	33
PID 2248 wrote to memory of 2452	2248	XClient.exe	35
PID 2248 wrote to memory of 2452	2248	XClient.exe	35
PID 2248 wrote to memory of 2452	2248	XClient.exe	35
PID 2248 wrote to memory of 2552	2248	XClient.exe	37
PID 2248 wrote to memory of 2552	2248	XClient.exe	37
PID 2248 wrote to memory of 2552	2248	XClient.exe	37
PID 1712 wrote to memory of 836	1712	taskeng.exe	40
PID 1712 wrote to memory of 836	1712	taskeng.exe	40
PID 1712 wrote to memory of 836	1712	taskeng.exe	40
PID 1712 wrote to memory of 3004	1712	taskeng.exe	43
PID 1712 wrote to memory of 3004	1712	taskeng.exe	43
PID 1712 wrote to memory of 3004	1712	taskeng.exe	43
PID 1712 wrote to memory of 2740	1712	taskeng.exe	48
PID 1712 wrote to memory of 2740	1712	taskeng.exe	48
PID 1712 wrote to memory of 2740	1712	taskeng.exe	48

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⤵
- 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:2248
- 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:2612
- 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:2828
- 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\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2380
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2452
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Creates scheduled task(s)
  PID:2552

C:\Windows\system32\taskeng.exe
taskeng.exe {04ACA79D-FE7E-4F9A-9ECF-6C5E8C55D929} S-1-5-21-481678230-3773327859-3495911762-1000:UIBNQNMA\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1712
- C:\Users\Admin\AppData\Roaming\svchost.exe
  C:\Users\Admin\AppData\Roaming\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:836
- C:\Users\Admin\AppData\Roaming\svchost.exe
  C:\Users\Admin\AppData\Roaming\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3004
- C:\Users\Admin\AppData\Roaming\svchost.exe
  C:\Users\Admin\AppData\Roaming\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2740

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:2224

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

590aee7bdd69b59b.customDestinations-ms

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Size 7KB
SHA256 c260c685505aad06cdf15acfeb73e6dd9a70066e4b99cb8b758ff64595d91faf
MD5 fb3113fa9fbc08af31a631036ecfe800
SHA1 43857514c73a8051a723b19ab33d4b7db3fce220
SHA512 cb06c853a181214a64fdd36d77c5a7a7e8f50471e9c5d7617b8861583f98ce371b4dd3ddb2619daea5251cdbfb20a031e697f6edb2b4e37003a43a6834afddfd
SSDEEP 96:QFKCBM8+nqvsqvJCwo2FKCBM8+nqvsEHyqvJCwornRYGQHgo7WUXlUVV:UDSUoWDSAHnornrRo7WUW
MD5 SHA1 SHA512 SSDEEP

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svchost.exe

Path C:\Users\Admin\AppData\Roaming\svchost.exe
Size 74KB
SHA256 14fc945249c10349174b83ae6330d19a8621f2a65ba69a54b2b923bf96933c3e
MD5 98f79018890d5b65e153e9d3082b024b
SHA1 2fa9e5abbc16d656d4dafa036af9a29e83fe9304
SHA512 d3599c1f5b09d26328469a0011dd61fbb9560fd851a1e47ab14cc5bc20ab28012f60eda0cce07be6ad1e22d8ff3012221ddf9c64f0a08dc52683744852e456cf
SSDEEP 1536:Qz2TVwZ+XVb6MIOkbpl9ZyhV956KMzNOfK5N5bR44:Qz2pXlb6YkbpUV9ZkNOgtu4
MD5 SHA1 SHA512 SSDEEP

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memory/836-36-0x0000000000990000-0x00000000009A8000-memory.dmp

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memory/2248-32-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

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memory/2248-1-0x0000000000220000-0x0000000000238000-memory.dmp

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memory/2248-2-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

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memory/2248-7-0x000007FEF55F3000-0x000007FEF55F4000-memory.dmp

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memory/2248-0-0x000007FEF55F3000-0x000007FEF55F4000-memory.dmp

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memory/2612-10-0x0000000002790000-0x0000000002798000-memory.dmp

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memory/2612-9-0x000000001B470000-0x000000001B752000-memory.dmp

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memory/2612-8-0x0000000002930000-0x00000000029B0000-memory.dmp

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memory/2740-41-0x0000000001310000-0x0000000001328000-memory.dmp

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memory/2828-17-0x0000000002000000-0x0000000002008000-memory.dmp

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memory/2828-16-0x000000001B780000-0x000000001BA62000-memory.dmp

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