xworm | 59bd22074ca7234553a0381ab31dd0dba972e03db211ca82a0cc6ab2cc312f77

Analysis

max time kernel
146s
max time network
149s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
03/06/2024, 16:51

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General

Target
XClient.exe
Size 40KB
Sample240603-vdbyhaea82
SHA256 59bd22074ca7234553a0381ab31dd0dba972e03db211ca82a0cc6ab2cc312f77
MD5 efa6fe7a0fed79f18b3c313063e97d25
SHA1 7deb26d64679d7fef288f2a0068a0965b490758b
SHA512 bcea1b81049d8c4b4e198add01aa32265be400d3963c7a5758509dbb9b9b9149e7674bd743713cef90e424d3b07e62d9da42c3a9631f2f38691ce7e50a004de4
SSDEEP 768:dJmozPu6Ut/OHQ5YV4UHtFZmrIBJF5PC9OlJLE6BOMhn3/eT:dFzxUtWIYV4UbIrIvFc9oJY6BOMZk
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

adult-mai.gl.at.ply.gg:5674

Mutex

hf8LZkWuI1linJTk

Attributes

Install_directory
%AppData%
install_file
XClient.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/2244-1-0x0000000000C30000-0x0000000000C40000-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
944	powershell.exe
1592	powershell.exe
2648	powershell.exe
3940	powershell.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
1	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 9 IoCs

pid	Process
1592	powershell.exe
1592	powershell.exe
2648	powershell.exe
2648	powershell.exe
3940	powershell.exe
3940	powershell.exe
944	powershell.exe
944	powershell.exe
2244	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2244	XClient.exe
Token: SeDebugPrivilege	1592	powershell.exe
Token: SeDebugPrivilege	2648	powershell.exe
Token: SeDebugPrivilege	3940	powershell.exe
Token: SeDebugPrivilege	944	powershell.exe
Token: SeDebugPrivilege	2244	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2244	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2244 wrote to memory of 1592	2244	XClient.exe	79
PID 2244 wrote to memory of 1592	2244	XClient.exe	79
PID 2244 wrote to memory of 2648	2244	XClient.exe	81
PID 2244 wrote to memory of 2648	2244	XClient.exe	81
PID 2244 wrote to memory of 3940	2244	XClient.exe	83
PID 2244 wrote to memory of 3940	2244	XClient.exe	83
PID 2244 wrote to memory of 944	2244	XClient.exe	85
PID 2244 wrote to memory of 944	2244	XClient.exe	85

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:2244
- 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:1592
- 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:2648
- 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:3940
- 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:944

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c
MD5 627073ee3ca9676911bee35548eff2b8
SHA1 4c4b68c65e2cab9864b51167d710aa29ebdcff2e
SHA512 3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 21942e513f223fdad778348fbb20617dd29f986bccd87824c0ae7f15649f3f31
MD5 d0a4a3b9a52b8fe3b019f6cd0ef3dad6
SHA1 fed70ce7834c3b97edbd078eccda1e5effa527cd
SHA512 1a66f837b4e7fb6346d0500aeacb44902fb8a239bce23416271263eba46fddae58a17075e188ae43eb516c841e02c87e32ebd73256c7cc2c0713d00c35f1761b
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 3952d5b543e5cb0cb84014f4ad9f5f1b7166f592d28640cbc3d914d0e6f41d2e
MD5 050567a067ffea4eb40fe2eefebdc1ee
SHA1 6e1fb2c7a7976e0724c532449e97722787a00fec
SHA512 341ad71ef7e850b10e229666312e4bca87a0ed9fe25ba4b0ab65661d5a0efa855db0592153106da07134d8fc2c6c0e44709bf38183c9a574a1fa543189971259
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 d3ed8912c9875d3135f7cff1dee9927a01bcd98db9e054a1525c2f11ea2a0435
MD5 a48326455a8785408959a54a930d4bf8
SHA1 e641a0ee3c8a45862fb2ff7dfa9bd3c202afbc7d
SHA512 1760a5592d944c591248c734ea2e839fbe310fb603f0df4d72090fa449ebe1154ae5013fbb0e282cd1684c4937057d485f784e415090b9a9b4473fede378890e
MD5 SHA1 SHA512

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__PSScriptPolicyTest_asz3lgyc.fd4.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_asz3lgyc.fd4.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/1592-4-0x00007FFAC46D0000-0x00007FFAC5192000-memory.dmp

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memory/1592-5-0x00007FFAC46D0000-0x00007FFAC5192000-memory.dmp

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memory/1592-14-0x000002A587510000-0x000002A587532000-memory.dmp

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memory/1592-15-0x00007FFAC46D0000-0x00007FFAC5192000-memory.dmp

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memory/1592-16-0x00007FFAC46D0000-0x00007FFAC5192000-memory.dmp

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memory/1592-19-0x00007FFAC46D0000-0x00007FFAC5192000-memory.dmp

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memory/1592-3-0x00007FFAC46D0000-0x00007FFAC5192000-memory.dmp

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memory/2244-0-0x00007FFAC46D3000-0x00007FFAC46D5000-memory.dmp

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memory/2244-2-0x00007FFAC46D0000-0x00007FFAC5192000-memory.dmp

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memory/2244-1-0x0000000000C30000-0x0000000000C40000-memory.dmp

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memory/2244-55-0x00007FFAC46D3000-0x00007FFAC46D5000-memory.dmp

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memory/2244-56-0x00007FFAC46D0000-0x00007FFAC5192000-memory.dmp

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