xworm | 9171099d6082d09e957e720c1e26e578866372f3ef6a0348dabe2d0603566ed7

Analysis

max time kernel
141s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
10/06/2024, 10:36

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General

Target
XClientd32.exe
Size 232KB
Sample240610-mnpcksgf25
SHA256 9171099d6082d09e957e720c1e26e578866372f3ef6a0348dabe2d0603566ed7
MD5 08752512ec581adeede0f79bc04c8c24
SHA1 65f04d1de0ea32c208dc1ce8faf7b59f128ac3ef
SHA512 6287bff71b3fc12acfcc80196fdbf87c0965f868d1a27c3a6a2492a45881d192cd6f698c773cd1718ed7f7bb61e514ec6f418b2ab4a600f30623caeb7fced4c2
SSDEEP 6144:bZOKhMqRb+JPBUhcX7elbKTua9bfF/H9d9n:tKqoJPB3X3u+
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

127.0.0.1:80
193.161.193.99:80

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/836-1-0x0000000000690000-0x00000000006D0000-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
3560	powershell.exe
2764	powershell.exe
4780	powershell.exe
1420	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	XClientd32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClientd32.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 8 IoCs

pid	Process
3560	powershell.exe
3560	powershell.exe
2764	powershell.exe
2764	powershell.exe
4780	powershell.exe
4780	powershell.exe
1420	powershell.exe
1420	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	836	XClientd32.exe
Token: SeDebugPrivilege	3560	powershell.exe
Token: SeDebugPrivilege	2764	powershell.exe
Token: SeDebugPrivilege	4780	powershell.exe
Token: SeDebugPrivilege	1420	powershell.exe
Token: SeDebugPrivilege	836	XClientd32.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 836 wrote to memory of 3560	836	XClientd32.exe	78
PID 836 wrote to memory of 3560	836	XClientd32.exe	78
PID 836 wrote to memory of 2764	836	XClientd32.exe	80
PID 836 wrote to memory of 2764	836	XClientd32.exe	80
PID 836 wrote to memory of 4780	836	XClientd32.exe	82
PID 836 wrote to memory of 4780	836	XClientd32.exe	82
PID 836 wrote to memory of 1420	836	XClientd32.exe	84
PID 836 wrote to memory of 1420	836	XClientd32.exe	84

C:\Users\Admin\AppData\Local\Temp\XClientd32.exe
"C:\Users\Admin\AppData\Local\Temp\XClientd32.exe"
1⤵
- Drops startup file
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:836
- 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\XClientd32.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3560
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClientd32.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2764
- 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:4780
- 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:1420

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 99c83bc5c531e49d4240700142f3425aba74e18ebcc23556be32238ffde9cce0
MD5 aa4f31835d07347297d35862c9045f4a
SHA1 83e728008935d30f98e5480fba4fbccf10cefb05
SHA512 ec3a4bee8335007b8753ae8ac42287f2b3bcbb258f7fc3fb15c9f8d3e611cb9bf6ae2d3034953286a34f753e9ec33f7495e064bab0e8c7fcedd75d6e5eb66629
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 3f67e4ba795fd89d33e9a1fe7547e297a82ae50b8f25eedc2b33a27866b28888
MD5 051a74485331f9d9f5014e58ec71566c
SHA1 4ed0256a84f2e95609a0b4d5c249bca624db8fe4
SHA512 1f15fd8ca727b198495ef826002c1cbcc63e98eecb2e92abff48354ae668e6c3aaf9bd3005664967ae75637bacee7e730ce36142483d08ae6a068d9ae3e0e17d
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 4994013dabe4f131d401879278eee147add6349124ea6452358dca7e2344c7a6
MD5 8cb7f4b4ab204cacd1af6b29c2a2042c
SHA1 244540c38e33eac05826d54282a0bfa60340d6a1
SHA512 7651cb6863a425840db610253151e271d3e8da26a8c633ce484247266fa226792ecb84b9578df3ab17fef84a5dfcad417b63a7df59c9650a907e08d59b91dd6e
MD5 SHA1 SHA512

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__PSScriptPolicyTest_dldbji5m.syh.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dldbji5m.syh.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/836-0-0x00007FF830B93000-0x00007FF830B95000-memory.dmp

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memory/836-2-0x00007FF830B90000-0x00007FF831652000-memory.dmp

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memory/836-1-0x0000000000690000-0x00000000006D0000-memory.dmp

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memory/836-55-0x00007FF830B90000-0x00007FF831652000-memory.dmp

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memory/3560-12-0x0000021208A00000-0x0000021208A22000-memory.dmp

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memory/3560-13-0x00007FF830B90000-0x00007FF831652000-memory.dmp

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memory/3560-14-0x00007FF830B90000-0x00007FF831652000-memory.dmp

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memory/3560-15-0x00007FF830B90000-0x00007FF831652000-memory.dmp

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memory/3560-16-0x00007FF830B90000-0x00007FF831652000-memory.dmp

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memory/3560-19-0x00007FF830B90000-0x00007FF831652000-memory.dmp

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memory/3560-3-0x00007FF830B90000-0x00007FF831652000-memory.dmp

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