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
133s
max time network
137s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-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
behavioral1/memory/4448-1-0x0000000000E60000-0x0000000000E7C000-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
4612	powershell.exe
3256	powershell.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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1108	timeout.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
4612	powershell.exe
4612	powershell.exe
4612	powershell.exe
3256	powershell.exe
3256	powershell.exe
3256	powershell.exe
4448	XClient.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeDebugPrivilege	4448	XClient.exe
Token: SeDebugPrivilege	4612	powershell.exe
Token: SeIncreaseQuotaPrivilege	4612	powershell.exe
Token: SeSecurityPrivilege	4612	powershell.exe
Token: SeTakeOwnershipPrivilege	4612	powershell.exe
Token: SeLoadDriverPrivilege	4612	powershell.exe
Token: SeSystemProfilePrivilege	4612	powershell.exe
Token: SeSystemtimePrivilege	4612	powershell.exe
Token: SeProfSingleProcessPrivilege	4612	powershell.exe
Token: SeIncBasePriorityPrivilege	4612	powershell.exe
Token: SeCreatePagefilePrivilege	4612	powershell.exe
Token: SeBackupPrivilege	4612	powershell.exe
Token: SeRestorePrivilege	4612	powershell.exe
Token: SeShutdownPrivilege	4612	powershell.exe
Token: SeDebugPrivilege	4612	powershell.exe
Token: SeSystemEnvironmentPrivilege	4612	powershell.exe
Token: SeRemoteShutdownPrivilege	4612	powershell.exe
Token: SeUndockPrivilege	4612	powershell.exe
Token: SeManageVolumePrivilege	4612	powershell.exe
Token: 33	4612	powershell.exe
Token: 34	4612	powershell.exe
Token: 35	4612	powershell.exe
Token: 36	4612	powershell.exe
Token: SeDebugPrivilege	3256	powershell.exe
Token: SeIncreaseQuotaPrivilege	3256	powershell.exe
Token: SeSecurityPrivilege	3256	powershell.exe
Token: SeTakeOwnershipPrivilege	3256	powershell.exe
Token: SeLoadDriverPrivilege	3256	powershell.exe
Token: SeSystemProfilePrivilege	3256	powershell.exe
Token: SeSystemtimePrivilege	3256	powershell.exe
Token: SeProfSingleProcessPrivilege	3256	powershell.exe
Token: SeIncBasePriorityPrivilege	3256	powershell.exe
Token: SeCreatePagefilePrivilege	3256	powershell.exe
Token: SeBackupPrivilege	3256	powershell.exe
Token: SeRestorePrivilege	3256	powershell.exe
Token: SeShutdownPrivilege	3256	powershell.exe
Token: SeDebugPrivilege	3256	powershell.exe
Token: SeSystemEnvironmentPrivilege	3256	powershell.exe
Token: SeRemoteShutdownPrivilege	3256	powershell.exe
Token: SeUndockPrivilege	3256	powershell.exe
Token: SeManageVolumePrivilege	3256	powershell.exe
Token: 33	3256	powershell.exe
Token: 34	3256	powershell.exe
Token: 35	3256	powershell.exe
Token: 36	3256	powershell.exe
Token: SeDebugPrivilege	4448	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4448	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4448 wrote to memory of 4612	4448	XClient.exe	74
PID 4448 wrote to memory of 4612	4448	XClient.exe	74
PID 4448 wrote to memory of 3256	4448	XClient.exe	77
PID 4448 wrote to memory of 3256	4448	XClient.exe	77
PID 4448 wrote to memory of 2376	4448	XClient.exe	79
PID 4448 wrote to memory of 2376	4448	XClient.exe	79
PID 2376 wrote to memory of 1108	2376	cmd.exe	81
PID 2376 wrote to memory of 1108	2376	cmd.exe	81

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:4448
- 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:4612
- 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:3256
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpF01D.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2376
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1108

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\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
ad5cd538ca58cb28ede39c108acb5785

SHA1
1ae910026f3dbe90ed025e9e96ead2b5399be877

SHA256
c9e6cb04d6c893458d5a7e12eb575cf97c3172f5e312b1f63a667cbbc5f0c033

SHA512
c066c5d9b276a68fa636647bb29aea05bfa2292217bc77f5324d9c1d93117772ee8277e1f7cff91ec8d6b7c05ca078f929cecfdbb09582522a9067f54740af13

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
5459ae0211b10090a38e739a40a15e96

SHA1
c8f5ce4920c096b66fe199ee7ce555b91e2392cb

SHA256
f8109c38b4cbd8183f166792e7e89b4bc48dd4c585809ad60993b9e1ca4b9e56

SHA512
211fcec1a39f1d75938c4eeae37755e7b9125d2978ea6438d78515eaf8f0478413c52da6e90d2b399005b050866b535d6be06e8a7a2d857d811feb884802bd51

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_l10pdr0f.ira.ps1

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpF01D.tmp.bat

Filesize
159B

MD5
45390f38d866348e8d94d6671dd2ac2e

SHA1
aaeb0d3a548fcd51fb485d7faac299daf11b9c29

SHA256
c97d1e39104b1502ff07e16de9328dc775aa5be6625bc167b5be75ca51506374

SHA512
d8c26473c48bca83adf02e5e28848bd1cbf708953c1886a15352dbf0cc7462b66415be7a907d30796fbfd62e58cc0badfa122676f7c4204ea12509053464a013

Download Submit
memory/4448-1-0x0000000000E60000-0x0000000000E7C000-memory.dmp

Filesize
112KB

Download
memory/4448-2-0x00007FFA9C3B0000-0x00007FFA9CD9C000-memory.dmp

Filesize
9.9MB

Download
memory/4448-101-0x00007FFA9C3B0000-0x00007FFA9CD9C000-memory.dmp

Filesize
9.9MB

Download
memory/4448-96-0x00007FFA9C3B0000-0x00007FFA9CD9C000-memory.dmp

Filesize
9.9MB

Download
memory/4448-0-0x00007FFA9C3B3000-0x00007FFA9C3B4000-memory.dmp

Filesize
4KB

Download
memory/4612-10-0x00007FFA9C3B0000-0x00007FFA9CD9C000-memory.dmp

Filesize
9.9MB

Download
memory/4612-51-0x00007FFA9C3B0000-0x00007FFA9CD9C000-memory.dmp

Filesize
9.9MB

Download
memory/4612-13-0x000001ACA9DC0000-0x000001ACA9E36000-memory.dmp

Filesize
472KB

Download
memory/4612-9-0x00007FFA9C3B0000-0x00007FFA9CD9C000-memory.dmp

Filesize
9.9MB

Download
memory/4612-8-0x00007FFA9C3B0000-0x00007FFA9CD9C000-memory.dmp

Filesize
9.9MB

Download
memory/4612-7-0x000001ACA9AB0000-0x000001ACA9AD2000-memory.dmp

Filesize
136KB

Download