xworm | e05ec6d8902b50a66fd606aa22777693d280c9f6b1fa884594d533534997aa0e

General

Target

XClient.exe
Size

230KB
MD5

3cefaf94fdda7a73b1630b756856a16c
SHA1

75ff4afa1db6af191464ce0a98e7b80b9c1bf41d
SHA256

e05ec6d8902b50a66fd606aa22777693d280c9f6b1fa884594d533534997aa0e
SHA512

bdf1d83f1a02a7c4cbebb45c61fb765d60a3e502692466fab816ca56c6f8483171101639ebad115b6edd7b8dac8212a3dcb12cfae545b13d37c3d19197b3c98f
SSDEEP

3072:hOpB7PALb4mVhVVChOVC2b8SKfbzxcwg7es6/Vsb8VKTu549oJMfF/H9N3Ky9Nzr:o7ubPbbUhcX7elbKTua9bfF/H9d9n

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

est-review.gl.at.ply.gg:21148

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/652-1-0x0000000000740000-0x000000000077E000-memory.dmp	family_xworm
behavioral2/files/0x000a000000023b7d-9.dat	family_xworm

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
1544	XClient.exe
4304	XClient.exe
3448	XClient.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-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.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
4140	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
652	XClient.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	652	XClient.exe
Token: SeDebugPrivilege	652	XClient.exe
Token: SeDebugPrivilege	1544	XClient.exe
Token: SeDebugPrivilege	4304	XClient.exe
Token: SeDebugPrivilege	3448	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
652	XClient.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 652 wrote to memory of 4140	652	XClient.exe	84
PID 652 wrote to memory of 4140	652	XClient.exe	84

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⤵
- Checks computer location settings
- 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:652
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4140

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1544

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4304

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\XClient.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
230KB

MD5
3cefaf94fdda7a73b1630b756856a16c

SHA1
75ff4afa1db6af191464ce0a98e7b80b9c1bf41d

SHA256
e05ec6d8902b50a66fd606aa22777693d280c9f6b1fa884594d533534997aa0e

SHA512
bdf1d83f1a02a7c4cbebb45c61fb765d60a3e502692466fab816ca56c6f8483171101639ebad115b6edd7b8dac8212a3dcb12cfae545b13d37c3d19197b3c98f

Download Submit
memory/652-0-0x00007FFCBD1D3000-0x00007FFCBD1D5000-memory.dmp

Filesize
8KB

Download
memory/652-1-0x0000000000740000-0x000000000077E000-memory.dmp

Filesize
248KB

Download
memory/652-6-0x00007FFCBD1D0000-0x00007FFCBDC91000-memory.dmp

Filesize
10.8MB

Download
memory/652-7-0x00007FFCBD1D3000-0x00007FFCBD1D5000-memory.dmp

Filesize
8KB

Download
memory/652-8-0x00007FFCBD1D0000-0x00007FFCBDC91000-memory.dmp

Filesize
10.8MB

Download
memory/1544-11-0x00007FFCBD1D0000-0x00007FFCBDC91000-memory.dmp

Filesize
10.8MB

Download
memory/1544-13-0x00007FFCBD1D0000-0x00007FFCBDC91000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads