xworm | 5d27d172d7910c67b668b31ed29826e973f1a78fb217b0dd4f40dcafe86bb6a2

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
21-01-2025 18:26

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General

Target

XClient.sfx.exe
Size

427KB
MD5

5435de027987f5f1f608719b0c8a752b
SHA1

b341e00d0bce1b8e085aaa7880c1e130bb6b3976
SHA256

5d27d172d7910c67b668b31ed29826e973f1a78fb217b0dd4f40dcafe86bb6a2
SHA512

fa75b2b27a2f1696b6dfac5fc6944f2501200eae3daaa449db3721d34c185435e82cf7c900b5f4c477185c5c9a410290e2ba9c93f7375e6810e90e61651d5d87
SSDEEP

6144:x5aMJNLwL73PZPkFr1jilzqqVWk6855JKSFtIooEbQYT+t1PNmSiqqvCr:xOxPkPjQeqQ1Y53KRYT+t1PABqv

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/files/0x0007000000019223-9.dat	family_xworm
behavioral1/memory/2404-12-0x00000000010B0000-0x00000000010CA000-memory.dmp	family_xworm
behavioral1/memory/2512-45-0x00000000001E0000-0x00000000001FA000-memory.dmp	family_xworm
behavioral1/memory/2008-49-0x0000000000BC0000-0x0000000000BDA000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1168	powershell.exe
2764	powershell.exe
2860	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

Executes dropped EXE 3 IoCs

pid	Process
2404	XClient.exe
2512	XClient.exe
2008	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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Local\\XClient.exe"	XClient.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2920	timeout.exe

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
3020	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1168	powershell.exe
2764	powershell.exe
2860	powershell.exe
2404	XClient.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2404	XClient.exe
Token: SeDebugPrivilege	1168	powershell.exe
Token: SeDebugPrivilege	2764	powershell.exe
Token: SeDebugPrivilege	2860	powershell.exe
Token: SeDebugPrivilege	2404	XClient.exe
Token: SeDebugPrivilege	2512	XClient.exe
Token: SeDebugPrivilege	2008	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2404	XClient.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1896 wrote to memory of 2404	1896	XClient.sfx.exe	30
PID 1896 wrote to memory of 2404	1896	XClient.sfx.exe	30
PID 1896 wrote to memory of 2404	1896	XClient.sfx.exe	30
PID 2404 wrote to memory of 1168	2404	XClient.exe	31
PID 2404 wrote to memory of 1168	2404	XClient.exe	31
PID 2404 wrote to memory of 1168	2404	XClient.exe	31
PID 2404 wrote to memory of 2764	2404	XClient.exe	33
PID 2404 wrote to memory of 2764	2404	XClient.exe	33
PID 2404 wrote to memory of 2764	2404	XClient.exe	33
PID 2404 wrote to memory of 2860	2404	XClient.exe	35
PID 2404 wrote to memory of 2860	2404	XClient.exe	35
PID 2404 wrote to memory of 2860	2404	XClient.exe	35
PID 2404 wrote to memory of 3020	2404	XClient.exe	38
PID 2404 wrote to memory of 3020	2404	XClient.exe	38
PID 2404 wrote to memory of 3020	2404	XClient.exe	38
PID 1672 wrote to memory of 2512	1672	taskeng.exe	41
PID 1672 wrote to memory of 2512	1672	taskeng.exe	41
PID 1672 wrote to memory of 2512	1672	taskeng.exe	41
PID 1672 wrote to memory of 2008	1672	taskeng.exe	43
PID 1672 wrote to memory of 2008	1672	taskeng.exe	43
PID 1672 wrote to memory of 2008	1672	taskeng.exe	43
PID 2404 wrote to memory of 1256	2404	XClient.exe	44
PID 2404 wrote to memory of 1256	2404	XClient.exe	44
PID 2404 wrote to memory of 1256	2404	XClient.exe	44
PID 2404 wrote to memory of 2496	2404	XClient.exe	46
PID 2404 wrote to memory of 2496	2404	XClient.exe	46
PID 2404 wrote to memory of 2496	2404	XClient.exe	46
PID 2496 wrote to memory of 2920	2496	cmd.exe	48
PID 2496 wrote to memory of 2920	2496	cmd.exe	48
PID 2496 wrote to memory of 2920	2496	cmd.exe	48

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.sfx.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.sfx.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1896
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\XClient.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\XClient.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2404
- - 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\RarSFX0\XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1168
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
    3⤵
    - 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\Local\XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2860
- - 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\Local\XClient.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3020
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /delete /f /tn "XClient"
    3⤵
    PID:1256
- - C:\Windows\system32\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp2D57.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2496
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:2920

C:\Windows\system32\taskeng.exe
taskeng.exe {3E173A28-74BF-4605-BCF9-6A17AD764469} S-1-5-21-2703099537-420551529-3771253338-1000:XECUDNCD\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1672
- C:\Users\Admin\AppData\Local\XClient.exe
  C:\Users\Admin\AppData\Local\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2512
- C:\Users\Admin\AppData\Local\XClient.exe
  C:\Users\Admin\AppData\Local\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2008

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\RarSFX0\XClient.exe

Filesize
80KB

MD5
bee4a56d9ba0426d3c95dde1970f6429

SHA1
2bfa99521d4a4f2ed6f9b457074ecf1fae7cd712

SHA256
d6684b27eb3b9913fd9742bf3ce9c38e5f089211b0c105893e44eeaf79f691a2

SHA512
294855ac413dec844467c23ddef1dd87334d0f83f5053a6e9e0b66f032d48e748351f4fa95e166d33c4385c4734d4f4af27365d3379d480a5b5a8ecb30e5f660

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp2D57.tmp.bat

Filesize
167B

MD5
2e6b03f6f9febc42fa43277119972512

SHA1
ad33b16e5c5b0bc712655ad10e52f9c1090292ee

SHA256
1ef10890956366febcbeaef8d9dfb157ede233ad4df5f34f614d8e1c5439113f

SHA512
361e05b0d757b64273594fa777923f53a9df446f4e01bca7cdd2c2c204377613a4baee135fa18204177f0f05e36d3e87b95f1bee75b771f26682efb00ef7b1e3

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
4f2dafd5f7fd13fcdb5f0b5dc5e662a5

SHA1
099ea1b476659c3e44809d761ca30d40d20f41ad

SHA256
9b409c9d242dc846ccfaf8b2daa35ca0a627732e3710e4be08e6948a952a138a

SHA512
dde969295457ab06eef66bcd8644208afd139acf5bb9bf1b81747d4c0856a6fc82626c18cc308c09d9a126d863487bf3ad2dfc89b1b437a8a1e71cf8a7607c13

Download Submit
memory/1168-18-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download
memory/1168-17-0x000000001B6C0000-0x000000001B9A2000-memory.dmp

Filesize
2.9MB

Download
memory/2008-49-0x0000000000BC0000-0x0000000000BDA000-memory.dmp

Filesize
104KB

Download
memory/2404-12-0x00000000010B0000-0x00000000010CA000-memory.dmp

Filesize
104KB

Download
memory/2404-40-0x000007FEF50B0000-0x000007FEF5A9C000-memory.dmp

Filesize
9.9MB

Download
memory/2404-41-0x000007FEF50B3000-0x000007FEF50B4000-memory.dmp

Filesize
4KB

Download
memory/2404-46-0x000007FEF50B0000-0x000007FEF5A9C000-memory.dmp

Filesize
9.9MB

Download
memory/2404-11-0x000007FEF50B3000-0x000007FEF50B4000-memory.dmp

Filesize
4KB

Download
memory/2404-60-0x000007FEF50B0000-0x000007FEF5A9C000-memory.dmp

Filesize
9.9MB

Download
memory/2512-45-0x00000000001E0000-0x00000000001FA000-memory.dmp

Filesize
104KB

Download
memory/2764-25-0x0000000001F60000-0x0000000001F68000-memory.dmp

Filesize
32KB

Download
memory/2764-24-0x000000001B640000-0x000000001B922000-memory.dmp

Filesize
2.9MB

Download