xworm | 0dd766f9c7fdb2b545a3071791a94dbfca4d321b9b83e7f7a16a9de77578a430

General

Target

uuhuhjuhuh.exe
Size

82KB
MD5

c72cc3fa1041ce6eb147096659e6294f
SHA1

136a6e2d203248c130b80ccd834da3522f958289
SHA256

0dd766f9c7fdb2b545a3071791a94dbfca4d321b9b83e7f7a16a9de77578a430
SHA512

bbe79dab5cb6a60595b1341afd019f5b713bd57f0b78341129d0104326d4cc1fe69321c0ab5fd2977f7052b00dcc5b0740115402354b7cd3ad077de19dc9b39b
SSDEEP

1536:Yea73bjqJ7T1KrtHm5GBablG23qOIzHF4gij6VOyEBloSrOQpWkW:Yea7raTcrtGEBablG23qOeGTisrOQpZW

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

147.185.221.23:38042

Attributes

Install_directory
%AppData%
install_file
SystemUser32.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/3040-1-0x0000000000D40000-0x0000000000D5A000-memory.dmp	family_xworm
behavioral1/files/0x000f0000000133b8-35.dat	family_xworm
behavioral1/memory/1724-37-0x0000000000B10000-0x0000000000B2A000-memory.dmp	family_xworm
behavioral1/memory/3016-40-0x00000000013B0000-0x00000000013CA000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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
2720	powershell.exe
2640	powershell.exe
2656	powershell.exe
1268	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SystemUser32.lnk	uuhuhjuhuh.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SystemUser32.lnk	uuhuhjuhuh.exe

Executes dropped EXE 3 IoCs

pid	Process
1724	SystemUser32.exe
3016	SystemUser32.exe
2236	SystemUser32.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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\SystemUser32 = "C:\\Users\\Admin\\AppData\\Roaming\\SystemUser32.exe"	uuhuhjuhuh.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

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2272	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2720	powershell.exe
2640	powershell.exe
2656	powershell.exe
1268	powershell.exe
3040	uuhuhjuhuh.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	3040	uuhuhjuhuh.exe
Token: SeDebugPrivilege	2720	powershell.exe
Token: SeDebugPrivilege	2640	powershell.exe
Token: SeDebugPrivilege	2656	powershell.exe
Token: SeDebugPrivilege	1268	powershell.exe
Token: SeDebugPrivilege	3040	uuhuhjuhuh.exe
Token: SeDebugPrivilege	1724	SystemUser32.exe
Token: SeDebugPrivilege	3016	SystemUser32.exe
Token: SeDebugPrivilege	2236	SystemUser32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3040	uuhuhjuhuh.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3040 wrote to memory of 2720	3040	uuhuhjuhuh.exe	31
PID 3040 wrote to memory of 2720	3040	uuhuhjuhuh.exe	31
PID 3040 wrote to memory of 2720	3040	uuhuhjuhuh.exe	31
PID 3040 wrote to memory of 2640	3040	uuhuhjuhuh.exe	33
PID 3040 wrote to memory of 2640	3040	uuhuhjuhuh.exe	33
PID 3040 wrote to memory of 2640	3040	uuhuhjuhuh.exe	33
PID 3040 wrote to memory of 2656	3040	uuhuhjuhuh.exe	35
PID 3040 wrote to memory of 2656	3040	uuhuhjuhuh.exe	35
PID 3040 wrote to memory of 2656	3040	uuhuhjuhuh.exe	35
PID 3040 wrote to memory of 1268	3040	uuhuhjuhuh.exe	37
PID 3040 wrote to memory of 1268	3040	uuhuhjuhuh.exe	37
PID 3040 wrote to memory of 1268	3040	uuhuhjuhuh.exe	37
PID 3040 wrote to memory of 2272	3040	uuhuhjuhuh.exe	39
PID 3040 wrote to memory of 2272	3040	uuhuhjuhuh.exe	39
PID 3040 wrote to memory of 2272	3040	uuhuhjuhuh.exe	39
PID 1492 wrote to memory of 1724	1492	taskeng.exe	42
PID 1492 wrote to memory of 1724	1492	taskeng.exe	42
PID 1492 wrote to memory of 1724	1492	taskeng.exe	42
PID 1492 wrote to memory of 3016	1492	taskeng.exe	44
PID 1492 wrote to memory of 3016	1492	taskeng.exe	44
PID 1492 wrote to memory of 3016	1492	taskeng.exe	44
PID 1492 wrote to memory of 2236	1492	taskeng.exe	45
PID 1492 wrote to memory of 2236	1492	taskeng.exe	45
PID 1492 wrote to memory of 2236	1492	taskeng.exe	45

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\uuhuhjuhuh.exe
"C:\Users\Admin\AppData\Local\Temp\uuhuhjuhuh.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:3040
- 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\uuhuhjuhuh.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2720
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'uuhuhjuhuh.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2640
- 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\SystemUser32.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2656
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SystemUser32.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1268
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "SystemUser32" /tr "C:\Users\Admin\AppData\Roaming\SystemUser32.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2272

C:\Windows\system32\taskeng.exe
taskeng.exe {5691E029-7A5C-4540-8481-5C5852C9FB6F} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1492
- C:\Users\Admin\AppData\Roaming\SystemUser32.exe
  C:\Users\Admin\AppData\Roaming\SystemUser32.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1724
- C:\Users\Admin\AppData\Roaming\SystemUser32.exe
  C:\Users\Admin\AppData\Roaming\SystemUser32.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3016
- C:\Users\Admin\AppData\Roaming\SystemUser32.exe
  C:\Users\Admin\AppData\Roaming\SystemUser32.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2236

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
bda898013d704157e982437b579d975e

SHA1
7d62f7ab599efeade141514b6b6b8bc27e18d722

SHA256
f4d3e8416a6acdcdab0f1b59cba9217099e9f4d6a9b9159ef0a207bc8762c3e0

SHA512
48d7f3008d40e5d72f10d40228de98811aef6c49567530516ac58844ad62b4dfda854bcf547de9533fed6e15646cbee5fc3a034083fdaffa0297bfccc9972fac

Download Submit
C:\Users\Admin\AppData\Roaming\SystemUser32.exe

Filesize
82KB

MD5
c72cc3fa1041ce6eb147096659e6294f

SHA1
136a6e2d203248c130b80ccd834da3522f958289

SHA256
0dd766f9c7fdb2b545a3071791a94dbfca4d321b9b83e7f7a16a9de77578a430

SHA512
bbe79dab5cb6a60595b1341afd019f5b713bd57f0b78341129d0104326d4cc1fe69321c0ab5fd2977f7052b00dcc5b0740115402354b7cd3ad077de19dc9b39b

Download Submit
memory/1724-37-0x0000000000B10000-0x0000000000B2A000-memory.dmp

Filesize
104KB

Download
memory/2640-14-0x000000001B230000-0x000000001B512000-memory.dmp

Filesize
2.9MB

Download
memory/2640-15-0x0000000002670000-0x0000000002678000-memory.dmp

Filesize
32KB

Download
memory/2720-8-0x0000000002270000-0x0000000002278000-memory.dmp

Filesize
32KB

Download
memory/2720-7-0x000000001B2E0000-0x000000001B5C2000-memory.dmp

Filesize
2.9MB

Download
memory/3016-40-0x00000000013B0000-0x00000000013CA000-memory.dmp

Filesize
104KB

Download
memory/3040-0-0x000007FEF5EF3000-0x000007FEF5EF4000-memory.dmp

Filesize
4KB

Download
memory/3040-16-0x000007FEF5EF3000-0x000007FEF5EF4000-memory.dmp

Filesize
4KB

Download
memory/3040-33-0x000007FEF5EF0000-0x000007FEF68DC000-memory.dmp

Filesize
9.9MB

Download
memory/3040-2-0x000007FEF5EF0000-0x000007FEF68DC000-memory.dmp

Filesize
9.9MB

Download
memory/3040-1-0x0000000000D40000-0x0000000000D5A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads