xworm | 28041fc75ea0dd89b4cfa6338ff7dd3ef053bf5e49eca14f6d8e4acc003c9c6b

Resubmissions

02/09/2024, 04:11

240902-erx5ws1ekl 10

31/08/2024, 15:44

240831-s6y8dssajf 10

31/08/2024, 15:41

240831-s4ytva1gph 10

31/08/2024, 15:35

240831-s1fh4a1fjk 10

Analysis

max time kernel
43s
max time network
41s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
31/08/2024, 15:44

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General

Target

XClient.exe
Size

84KB
MD5

13f12b20731a141144d59aef56828f78
SHA1

2aef63a0f584914b022ea7d039bd431fa99520b3
SHA256

28041fc75ea0dd89b4cfa6338ff7dd3ef053bf5e49eca14f6d8e4acc003c9c6b
SHA512

19f9aeb3ceed2cd0ab93e0f449174de9f07afba41f38c620a1480b052c18ce898d52b9c90f3cfe83611064b4b6cf7444041a4b1d52de214811436975802bcbaa
SSDEEP

1536:E4VFkamGxes+ESPmWnz5fH0hgThsipZR8beJKNlG8V6f7/7zOD5gfRJoBP:E4VNxedPmWt04/UbeSly7/vOD5c4V

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

178.215.236.68:7000

Attributes

install_file
USB.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/1432-1-0x0000000000A20000-0x0000000000A3C000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2680	powershell.exe
2956	powershell.exe

Deletes itself 1 IoCs

pid	Process
2196	cmd.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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1196	timeout.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2956	powershell.exe
2680	powershell.exe
1432	XClient.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1432	XClient.exe
Token: SeDebugPrivilege	2956	powershell.exe
Token: SeDebugPrivilege	2680	powershell.exe
Token: SeDebugPrivilege	1432	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1432	XClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1432 wrote to memory of 2956	1432	XClient.exe	31
PID 1432 wrote to memory of 2956	1432	XClient.exe	31
PID 1432 wrote to memory of 2956	1432	XClient.exe	31
PID 1432 wrote to memory of 2680	1432	XClient.exe	33
PID 1432 wrote to memory of 2680	1432	XClient.exe	33
PID 1432 wrote to memory of 2680	1432	XClient.exe	33
PID 1432 wrote to memory of 2196	1432	XClient.exe	35
PID 1432 wrote to memory of 2196	1432	XClient.exe	35
PID 1432 wrote to memory of 2196	1432	XClient.exe	35
PID 2196 wrote to memory of 1196	2196	cmd.exe	37
PID 2196 wrote to memory of 1196	2196	cmd.exe	37
PID 2196 wrote to memory of 1196	2196	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1432
- 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:2956
- 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:2680
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp7D0C.tmp.bat""
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2196
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1196

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp7D0C.tmp.bat

Filesize
159B

MD5
ae35558d7df786aced9ca004aa3c8ba1

SHA1
cf14c9177b3b94786e1c6804f884343ad3ac3b7b

SHA256
f96b62e67855bb0de0c764e6f077f55d0e256cee42aad8b89dbdd22322f95e36

SHA512
5a8baf9d7c011fbf118b3be8ea12da79558f8b59f1d0ed5c23781fd53de4fdf50292df83d875ec0ca8ad0d2a5af50d115f602cfe12cc05a9b24213c8ab056581

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\N9H65ZJ5EGK4I2I6D0XP.temp

Filesize
7KB

MD5
5e1eff71f80ee7e7df9442019d2268e0

SHA1
6574331ed0f7fc2cc35ef070a9fcef60babe6113

SHA256
255f27b9d28d0c7aa9d3d765f7828d7b461687552ec4aecd9e2fe345f950224e

SHA512
72126646deecfa53a594c952aa8cbcf4c11c2ba3db8f9e733a340e66c620bab2b7f9c5c4f5ca1c6ae66019ae37671ab6d201583eec0efd4ce110d967d34a5c10

Download Submit
memory/1432-1-0x0000000000A20000-0x0000000000A3C000-memory.dmp

Filesize
112KB

Download
memory/1432-2-0x000007FEF6350000-0x000007FEF6D3C000-memory.dmp

Filesize
9.9MB

Download
memory/1432-27-0x000007FEF6350000-0x000007FEF6D3C000-memory.dmp

Filesize
9.9MB

Download
memory/1432-18-0x000007FEF6350000-0x000007FEF6D3C000-memory.dmp

Filesize
9.9MB

Download
memory/1432-0-0x000007FEF6353000-0x000007FEF6354000-memory.dmp

Filesize
4KB

Download
memory/1432-17-0x000007FEF6353000-0x000007FEF6354000-memory.dmp

Filesize
4KB

Download
memory/2680-15-0x000000001B650000-0x000000001B932000-memory.dmp

Filesize
2.9MB

Download
memory/2680-16-0x00000000022D0000-0x00000000022D8000-memory.dmp

Filesize
32KB

Download
memory/2956-9-0x0000000001E00000-0x0000000001E08000-memory.dmp

Filesize
32KB

Download
memory/2956-8-0x000000001B670000-0x000000001B952000-memory.dmp

Filesize
2.9MB

Download
memory/2956-7-0x0000000002940000-0x00000000029C0000-memory.dmp

Filesize
512KB

Download