xworm | 00956e3a55867b348d29da5f04cf6fb51e85872389ce6dc5f4015a958c575fb3

General

Target

mygame.exe
Size

137KB
MD5

1a925fce50787a5028b73dd32e0c7dce
SHA1

7205d5c3d7efbc5805eb0b343a1bc83903e7589c
SHA256

00956e3a55867b348d29da5f04cf6fb51e85872389ce6dc5f4015a958c575fb3
SHA512

ceec3fa381bbcb32fb520b876fac67defc2712fcf7dcbf4a69d50a227c8f81f1cbb3aac03fc0f2ac007105b9b378c5a1c405ec2b326bf284795c0ae0e85d93a8
SSDEEP

3072:6fjh7Fv9fjOwiBz65/M6If+3Js+3JFkKeTno:8hJv9AxBt25

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

147.185.221.23:48450

Mutex

2YsFPOHVMLfmF9px

Attributes

Install_directory
%AppData%
install_file
Update.exe

aes.plain

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral2/memory/2672-1-0x0000000000290000-0x00000000002B8000-memory.dmp	family_xworm
behavioral2/files/0x0009000000012116-34.dat	family_xworm
behavioral2/memory/1964-36-0x0000000000990000-0x00000000009B8000-memory.dmp	family_xworm
behavioral2/memory/964-39-0x0000000000BA0000-0x0000000000BC8000-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
2544	powershell.exe
2940	powershell.exe
2696	powershell.exe
2616	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
1964	Update.exe
964	Update.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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\Update = "C:\\Users\\Admin\\AppData\\Roaming\\Update.exe"	mygame.exe

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
2668	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2544	powershell.exe
2940	powershell.exe
2696	powershell.exe
2616	powershell.exe
2672	mygame.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2672	mygame.exe
Token: SeDebugPrivilege	2544	powershell.exe
Token: SeDebugPrivilege	2940	powershell.exe
Token: SeDebugPrivilege	2696	powershell.exe
Token: SeDebugPrivilege	2616	powershell.exe
Token: SeDebugPrivilege	2672	mygame.exe
Token: SeDebugPrivilege	1964	Update.exe
Token: SeDebugPrivilege	964	Update.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2672	mygame.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2672 wrote to memory of 2544	2672	mygame.exe	30
PID 2672 wrote to memory of 2544	2672	mygame.exe	30
PID 2672 wrote to memory of 2544	2672	mygame.exe	30
PID 2672 wrote to memory of 2940	2672	mygame.exe	32
PID 2672 wrote to memory of 2940	2672	mygame.exe	32
PID 2672 wrote to memory of 2940	2672	mygame.exe	32
PID 2672 wrote to memory of 2696	2672	mygame.exe	35
PID 2672 wrote to memory of 2696	2672	mygame.exe	35
PID 2672 wrote to memory of 2696	2672	mygame.exe	35
PID 2672 wrote to memory of 2616	2672	mygame.exe	37
PID 2672 wrote to memory of 2616	2672	mygame.exe	37
PID 2672 wrote to memory of 2616	2672	mygame.exe	37
PID 2672 wrote to memory of 2668	2672	mygame.exe	39
PID 2672 wrote to memory of 2668	2672	mygame.exe	39
PID 2672 wrote to memory of 2668	2672	mygame.exe	39
PID 872 wrote to memory of 1964	872	taskeng.exe	43
PID 872 wrote to memory of 1964	872	taskeng.exe	43
PID 872 wrote to memory of 1964	872	taskeng.exe	43
PID 872 wrote to memory of 964	872	taskeng.exe	44
PID 872 wrote to memory of 964	872	taskeng.exe	44
PID 872 wrote to memory of 964	872	taskeng.exe	44

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\mygame.exe
"C:\Users\Admin\AppData\Local\Temp\mygame.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:2672
- 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\mygame.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2544
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'mygame.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2940
- 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\Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2696
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2616
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Update" /tr "C:\Users\Admin\AppData\Roaming\Update.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2668

C:\Windows\system32\taskeng.exe
taskeng.exe {54F70A2B-2A4E-4546-9BDA-0DD730788C0E} S-1-5-21-2872745919-2748461613-2989606286-1000:CCJBVTGQ\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:872
- C:\Users\Admin\AppData\Roaming\Update.exe
  C:\Users\Admin\AppData\Roaming\Update.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1964
- C:\Users\Admin\AppData\Roaming\Update.exe
  C:\Users\Admin\AppData\Roaming\Update.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:964

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
2bf6559c1515f3db6f163cb1fc67389d

SHA1
9d3a4054bce944e81a78f07555e1540f9f0c1ee7

SHA256
9747f9ddd63729d767d7380f225b932ed0244813cb8fe0fa83d953d7b4523070

SHA512
7637c0888320660ae39429b5d2b6a07466bf92795261c00ccf6a06b97f7dea288bcf1b22444d7fc6e590cefc4ac860c58edbd48286d1d87c536a56e9b1397d48

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

Filesize
137KB

MD5
1a925fce50787a5028b73dd32e0c7dce

SHA1
7205d5c3d7efbc5805eb0b343a1bc83903e7589c

SHA256
00956e3a55867b348d29da5f04cf6fb51e85872389ce6dc5f4015a958c575fb3

SHA512
ceec3fa381bbcb32fb520b876fac67defc2712fcf7dcbf4a69d50a227c8f81f1cbb3aac03fc0f2ac007105b9b378c5a1c405ec2b326bf284795c0ae0e85d93a8

Download Submit
memory/964-39-0x0000000000BA0000-0x0000000000BC8000-memory.dmp

Filesize
160KB

Download
memory/1964-36-0x0000000000990000-0x00000000009B8000-memory.dmp

Filesize
160KB

Download
memory/2544-6-0x0000000002EA0000-0x0000000002F20000-memory.dmp

Filesize
512KB

Download
memory/2544-7-0x000000001B710000-0x000000001B9F2000-memory.dmp

Filesize
2.9MB

Download
memory/2544-8-0x00000000021D0000-0x00000000021D8000-memory.dmp

Filesize
32KB

Download
memory/2672-31-0x000007FEF59D3000-0x000007FEF59D4000-memory.dmp

Filesize
4KB

Download
memory/2672-30-0x000000001B0F0000-0x000000001B170000-memory.dmp

Filesize
512KB

Download
memory/2672-0-0x000007FEF59D3000-0x000007FEF59D4000-memory.dmp

Filesize
4KB

Download
memory/2672-32-0x000000001B0F0000-0x000000001B170000-memory.dmp

Filesize
512KB

Download
memory/2672-1-0x0000000000290000-0x00000000002B8000-memory.dmp

Filesize
160KB

Download
memory/2940-15-0x0000000002310000-0x0000000002318000-memory.dmp

Filesize
32KB

Download
memory/2940-14-0x000000001B6C0000-0x000000001B9A2000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads