xworm | 5fb96191ad7394700966c0854e3f1225b8b2989f528ce6993a747ff7a9cf2552

General

Target

XClient.exe
Size

67KB
MD5

c9cd80d55733208fc06b8b52cddb52dc
SHA1

6cc60302d90e7d7661b5b194fa954efacba19d49
SHA256

5fb96191ad7394700966c0854e3f1225b8b2989f528ce6993a747ff7a9cf2552
SHA512

befca56bfce924e50c11f9d702ab2d6a6e05d55cd4399c4ac37891c1d337a43d05060f5cb9a1600fc4c172f7816fad14bc02e0c8d44eb82b55f61da4812cd0aa
SSDEEP

1536:n5ydgkcoaOOTxMH/W0WybZYgmH2r2i6urYiZOenvefZ3:FVxMfwybZ4rYXZOewZ3

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

silver-bowl.gl.at.ply.gg:29206

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3100-0-0x00000000002D0000-0x00000000002E8000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
3340	powershell.exe
4796	powershell.exe
700	powershell.exe
4808	powershell.exe

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-1-5-21-1337824034-2731376981-3755436523-1000\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

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
15	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3340	powershell.exe
3340	powershell.exe
4796	powershell.exe
4796	powershell.exe
700	powershell.exe
700	powershell.exe
4808	powershell.exe
4808	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3100	XClient.exe
Token: SeDebugPrivilege	3340	powershell.exe
Token: SeDebugPrivilege	4796	powershell.exe
Token: SeDebugPrivilege	700	powershell.exe
Token: SeDebugPrivilege	4808	powershell.exe
Token: SeDebugPrivilege	3100	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3100 wrote to memory of 3340	3100	XClient.exe	88
PID 3100 wrote to memory of 3340	3100	XClient.exe	88
PID 3100 wrote to memory of 4796	3100	XClient.exe	90
PID 3100 wrote to memory of 4796	3100	XClient.exe	90
PID 3100 wrote to memory of 700	3100	XClient.exe	92
PID 3100 wrote to memory of 700	3100	XClient.exe	92
PID 3100 wrote to memory of 4808	3100	XClient.exe	94
PID 3100 wrote to memory of 4808	3100	XClient.exe	94

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3100
- 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:3340
- 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:4796
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:700
- 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:4808

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

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\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
59d97011e091004eaffb9816aa0b9abd

SHA1
1602a56b01dd4b7c577ca27d3117e4bcc1aa657b

SHA256
18f381e0db020a763b8c515c346ef58679ab9c403267eacfef5359e272f7e71d

SHA512
d9ca49c1a17580981e2c1a50d73c0eecaa7a62f8514741512172e395af2a3d80aeb0f71c58bc7f52c18246d57ba67af09b6bff4776877d6cc6f0245c30e092d6

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

Filesize
944B

MD5
07ab6cc81c5230a598c0ad1711b6bd97

SHA1
de7e270e12d447dfc5896b7c96777eb32725778a

SHA256
900aa2c83ec8773c3f9705f75b28fff0eaca57f7adb33dc82564d7ea8f8069a3

SHA512
ffef0ad0824ea0fdab29eb3c44448100f79365a1729c7665eba9aef85a88e60901bc6a6c248de15a28d21be9ce5839d68861e4449ff557d8845927c740ba3a25

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

Filesize
944B

MD5
6d14ccefeb263594e60b1765e131f7a3

SHA1
4a9ebdc0dff58645406c40b7b140e1b174756721

SHA256
57cd435c8b2bf10a2c77698301789c032e1b6b623ff1420c72e8bca0b10f1e5c

SHA512
2013a26123f72a4106524fd9d7389ac4654f97033d22707efc084fb2a3ad01c298eb64f01bb64861ab603615022dbe7cfc97475346edb16b3ba72e905127f101

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ujdaho2d.kgn.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3100-1-0x00007FFF98773000-0x00007FFF98775000-memory.dmp

Filesize
8KB

Download
memory/3100-2-0x00007FFF98770000-0x00007FFF99231000-memory.dmp

Filesize
10.8MB

Download
memory/3100-0-0x00000000002D0000-0x00000000002E8000-memory.dmp

Filesize
96KB

Download
memory/3100-56-0x00007FFF98770000-0x00007FFF99231000-memory.dmp

Filesize
10.8MB

Download
memory/3100-55-0x00007FFF98773000-0x00007FFF98775000-memory.dmp

Filesize
8KB

Download
memory/3340-3-0x00007FFF98770000-0x00007FFF99231000-memory.dmp

Filesize
10.8MB

Download
memory/3340-17-0x00007FFF98770000-0x00007FFF99231000-memory.dmp

Filesize
10.8MB

Download
memory/3340-6-0x0000021AE3660000-0x0000021AE3682000-memory.dmp

Filesize
136KB

Download
memory/3340-5-0x00007FFF98770000-0x00007FFF99231000-memory.dmp

Filesize
10.8MB

Download
memory/3340-4-0x00007FFF98770000-0x00007FFF99231000-memory.dmp

Filesize
10.8MB

Download

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