xworm | 2862431a58c6d05311734d24fdd812e19bf01c0cdc50fb549347e461713a3449

General

Target

XClient.exe
Size

40KB
MD5

36a1ae0555b5c56da0d72fc78864f11e
SHA1

516159937190a889e2cfa1f4b3a2d4a0a772f82f
SHA256

2862431a58c6d05311734d24fdd812e19bf01c0cdc50fb549347e461713a3449
SHA512

3313c7303e745de06a0cc0b1093f251f82bffd88fea7d37403449924a0d7c8a844d9d73ace749022b60cf3932c3da121c3a6836f62347942d622d5a3af3f6cea
SSDEEP

768:INfPMSk3K/EzTb/0X8WuFZ4ZJF5PC9O9568OMhu3/O2:of05a/CTjS89wFc9U568OMsF

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

156.225.129.219:1445

Mutex

LkRlKJxmQjSvDYPt

Attributes

Install_directory
%Userprofile%
install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/1924-1-0x00000000003B0000-0x00000000003C0000-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
2736	powershell.exe
2588	powershell.exe
268	powershell.exe
344	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\csrss.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\csrss.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
4	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 5 IoCs

pid	Process
2736	powershell.exe
2588	powershell.exe
268	powershell.exe
344	powershell.exe
1924	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1924	XClient.exe
Token: SeDebugPrivilege	2736	powershell.exe
Token: SeDebugPrivilege	2588	powershell.exe
Token: SeDebugPrivilege	268	powershell.exe
Token: SeDebugPrivilege	344	powershell.exe
Token: SeDebugPrivilege	1924	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1924	XClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1924 wrote to memory of 2736	1924	XClient.exe	32
PID 1924 wrote to memory of 2736	1924	XClient.exe	32
PID 1924 wrote to memory of 2736	1924	XClient.exe	32
PID 1924 wrote to memory of 2588	1924	XClient.exe	34
PID 1924 wrote to memory of 2588	1924	XClient.exe	34
PID 1924 wrote to memory of 2588	1924	XClient.exe	34
PID 1924 wrote to memory of 268	1924	XClient.exe	36
PID 1924 wrote to memory of 268	1924	XClient.exe	36
PID 1924 wrote to memory of 268	1924	XClient.exe	36
PID 1924 wrote to memory of 344	1924	XClient.exe	38
PID 1924 wrote to memory of 344	1924	XClient.exe	38
PID 1924 wrote to memory of 344	1924	XClient.exe	38

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1924
- 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:2736
- 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:2588
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\csrss'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:268
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'csrss'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:344

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

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
2ac30b903c896eeb7da3d0ab304c4b6c

SHA1
66c803dc76d89bc961528d1358b1a9f2e62413a7

SHA256
db5a26ef4eb4b7120c67224dbfc230dbd6623309e1ca27f06771c06b293549ce

SHA512
8d3a4630289dbb8a220fcaa504e6b220993a5aee2a3ff7f87533cfc7cc99e78b2bd7bfb41bf0c87fb0960cab112a99be8c7da94eca666b4f5b46222cff52460a

Download Submit
memory/1924-0-0x000007FEF5943000-0x000007FEF5944000-memory.dmp

Filesize
4KB

Download
memory/1924-1-0x00000000003B0000-0x00000000003C0000-memory.dmp

Filesize
64KB

Download
memory/1924-2-0x000007FEF5940000-0x000007FEF632C000-memory.dmp

Filesize
9.9MB

Download
memory/1924-28-0x000007FEF5943000-0x000007FEF5944000-memory.dmp

Filesize
4KB

Download
memory/1924-33-0x000007FEF5940000-0x000007FEF632C000-memory.dmp

Filesize
9.9MB

Download
memory/2588-15-0x000000001B740000-0x000000001BA22000-memory.dmp

Filesize
2.9MB

Download
memory/2588-16-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download
memory/2736-7-0x0000000002CD0000-0x0000000002D50000-memory.dmp

Filesize
512KB

Download
memory/2736-8-0x000000001B760000-0x000000001BA42000-memory.dmp

Filesize
2.9MB

Download
memory/2736-9-0x0000000001F00000-0x0000000001F08000-memory.dmp

Filesize
32KB

Download

Analysis

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