xworm | 668e1915843fce533abb874f9933deb6136103f5f31d09847a1e086fbaa18e9b

Analysis

max time kernel
147s
max time network
151s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
09/06/2024, 01:01

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General

Target
029acdc2e958ec708b40a237f681ae75.exe
Size 72KB
Sample240609-bc995abg75
SHA256 668e1915843fce533abb874f9933deb6136103f5f31d09847a1e086fbaa18e9b
MD5 029acdc2e958ec708b40a237f681ae75
SHA1 3c1ea5e5639bc18153410208429a87a64075a23c
SHA512 96cbe9b27f619831c7d38eb4f8922e53fd3c710af067bb64748aa89de07442b081b7c522dd1da5e659c501e72461b10de1c3883aa19815d9b030843d02c0ceca
SSDEEP 1536:Y0oRipEs7aFqa6XfhIQiMjA/DbO/MoBGM1rujK6gYSOsFbJY:Y0iU7aFqaSRDjKDbO/9N1USOsDY
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

european-ba.gl.at.ply.gg:14522

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/1692-1-0x0000000000A90000-0x0000000000AA8000-memory.dmp	family_xworm
behavioral1/files/0x000d00000001560a-34.dat	family_xworm
behavioral1/memory/2508-36-0x0000000000DB0000-0x0000000000DC8000-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
2640	powershell.exe
2384	powershell.exe
1300	powershell.exe
2456	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	029acdc2e958ec708b40a237f681ae75.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	029acdc2e958ec708b40a237f681ae75.exe

Executes dropped EXE 2 IoCs

pid	Process
2508	svchost.exe
1668	svchost.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-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	029acdc2e958ec708b40a237f681ae75.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

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
1328	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2456	powershell.exe
2640	powershell.exe
2384	powershell.exe
1300	powershell.exe
1692	029acdc2e958ec708b40a237f681ae75.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1692	029acdc2e958ec708b40a237f681ae75.exe
Token: SeDebugPrivilege	2456	powershell.exe
Token: SeDebugPrivilege	2640	powershell.exe
Token: SeDebugPrivilege	2384	powershell.exe
Token: SeDebugPrivilege	1300	powershell.exe
Token: SeDebugPrivilege	1692	029acdc2e958ec708b40a237f681ae75.exe
Token: SeDebugPrivilege	2508	svchost.exe
Token: SeDebugPrivilege	1668	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1692	029acdc2e958ec708b40a237f681ae75.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1692 wrote to memory of 2456	1692	029acdc2e958ec708b40a237f681ae75.exe	29
PID 1692 wrote to memory of 2456	1692	029acdc2e958ec708b40a237f681ae75.exe	29
PID 1692 wrote to memory of 2456	1692	029acdc2e958ec708b40a237f681ae75.exe	29
PID 1692 wrote to memory of 2640	1692	029acdc2e958ec708b40a237f681ae75.exe	31
PID 1692 wrote to memory of 2640	1692	029acdc2e958ec708b40a237f681ae75.exe	31
PID 1692 wrote to memory of 2640	1692	029acdc2e958ec708b40a237f681ae75.exe	31
PID 1692 wrote to memory of 2384	1692	029acdc2e958ec708b40a237f681ae75.exe	33
PID 1692 wrote to memory of 2384	1692	029acdc2e958ec708b40a237f681ae75.exe	33
PID 1692 wrote to memory of 2384	1692	029acdc2e958ec708b40a237f681ae75.exe	33
PID 1692 wrote to memory of 1300	1692	029acdc2e958ec708b40a237f681ae75.exe	35
PID 1692 wrote to memory of 1300	1692	029acdc2e958ec708b40a237f681ae75.exe	35
PID 1692 wrote to memory of 1300	1692	029acdc2e958ec708b40a237f681ae75.exe	35
PID 1692 wrote to memory of 1328	1692	029acdc2e958ec708b40a237f681ae75.exe	37
PID 1692 wrote to memory of 1328	1692	029acdc2e958ec708b40a237f681ae75.exe	37
PID 1692 wrote to memory of 1328	1692	029acdc2e958ec708b40a237f681ae75.exe	37
PID 2400 wrote to memory of 2508	2400	taskeng.exe	42
PID 2400 wrote to memory of 2508	2400	taskeng.exe	42
PID 2400 wrote to memory of 2508	2400	taskeng.exe	42
PID 2400 wrote to memory of 1668	2400	taskeng.exe	43
PID 2400 wrote to memory of 1668	2400	taskeng.exe	43
PID 2400 wrote to memory of 1668	2400	taskeng.exe	43

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\029acdc2e958ec708b40a237f681ae75.exe
"C:\Users\Admin\AppData\Local\Temp\029acdc2e958ec708b40a237f681ae75.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1692
- 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\029acdc2e958ec708b40a237f681ae75.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2456
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '029acdc2e958ec708b40a237f681ae75.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2640
- 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\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2384
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1300
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Creates scheduled task(s)
  PID:1328

C:\Windows\system32\taskeng.exe
taskeng.exe {D89B5AB5-3D2D-495E-8C20-9BDF9C670FB6} S-1-5-21-330940541-141609230-1670313778-1000:KXIPPCKF\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2400
- C:\Users\Admin\AppData\Roaming\svchost.exe
  C:\Users\Admin\AppData\Roaming\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2508
- C:\Users\Admin\AppData\Roaming\svchost.exe
  C:\Users\Admin\AppData\Roaming\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

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

590aee7bdd69b59b.customDestinations-ms

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Size 7KB
SHA256 a1f57553936ade01163056b89dfaedea5c4f4945d2d4469822ed92d291272b5d
MD5 eae0cef0d265e443ba9ab3855dc3edf6
SHA1 a568f1f00cc58fd6949774d8c7176b2792b47fc0
SHA512 9e0787e39a480d4aede77c7547d86269f714e87a80d50dd52c20ef0e02d3c1a25eccbbf600cb4705cd0b9c84be47f9e246240db8da225c21941216b3d73075cc
SSDEEP 96:oVuCpM8gnqvsqvJCwoXVuCpM8gnqvsEHyqvJCwor2BDpQHqj7uKXlUVu:MHUUoFHUAHnor2rrj7uKR
MD5 SHA1 SHA512 SSDEEP

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svchost.exe

Path C:\Users\Admin\AppData\Roaming\svchost.exe
Size 72KB
SHA256 668e1915843fce533abb874f9933deb6136103f5f31d09847a1e086fbaa18e9b
MD5 029acdc2e958ec708b40a237f681ae75
SHA1 3c1ea5e5639bc18153410208429a87a64075a23c
SHA512 96cbe9b27f619831c7d38eb4f8922e53fd3c710af067bb64748aa89de07442b081b7c522dd1da5e659c501e72461b10de1c3883aa19815d9b030843d02c0ceca
SSDEEP 1536:Y0oRipEs7aFqa6XfhIQiMjA/DbO/MoBGM1rujK6gYSOsFbJY:Y0iU7aFqaSRDjKDbO/9N1USOsDY
MD5 SHA1 SHA512 SSDEEP

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memory/1692-1-0x0000000000A90000-0x0000000000AA8000-memory.dmp

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memory/1692-2-0x000007FEF5740000-0x000007FEF612C000-memory.dmp

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memory/1692-0-0x000007FEF5743000-0x000007FEF5744000-memory.dmp

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memory/1692-32-0x000007FEF5740000-0x000007FEF612C000-memory.dmp

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memory/1692-31-0x000007FEF5743000-0x000007FEF5744000-memory.dmp

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memory/2456-7-0x000000001B2F0000-0x000000001B5D2000-memory.dmp

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memory/2456-8-0x0000000001F20000-0x0000000001F28000-memory.dmp

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memory/2508-36-0x0000000000DB0000-0x0000000000DC8000-memory.dmp

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memory/2640-15-0x0000000001E40000-0x0000000001E48000-memory.dmp

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memory/2640-14-0x000000001B330000-0x000000001B612000-memory.dmp

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