xworm | b708ee49186388dc9f334877985ee25c2ade79aca53c710dad8ee458c2dd4e40

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240730-en
resource tags

arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
submitted
01/08/2024, 21:30

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General

Target
cmd.exe
Size 223KB
Sample240801-1cldfawhpl
SHA256 b708ee49186388dc9f334877985ee25c2ade79aca53c710dad8ee458c2dd4e40
MD5 12982ac83ad56a6498cb35ac809a372d
SHA1 3f1d1b2ec2d8a66b5f34ca52bddf92f095ecbe1e
SHA512 93eb087005e04ae00fa4e50d45bded5f7867edb0d3b1a59bf912ec7c0a8d3eb9a8695c6fb97c6d4c2baf54323916456625e228ecfff42327c4083a037ff6749e
SSDEEP 3072:59nbq6SB3q+8BpxITV1nr/6ENVvncMxBJEHBAnpK37nX7880u5Q1tEPsY74tyJh1:e8BIHnr/6wtVx+8ecEPHE9o1r/Z
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

Mutex

pIY7szY7mQ1Jy6Fv

Attributes

Install_directory
%Temp%
install_file
USB.exe
pastebin_url
https://pastebin.com/raw/AsXpMYtv

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3500-37-0x0000000001150000-0x0000000001160000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 6 IoCs

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

execution

PowerShell

T1059.001

pid	Process
4960	powershell.exe
3088	powershell.exe
5004	powershell.exe
1756	powershell.exe
1604	powershell.exe
532	powershell.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-857544305-989156968-2929034274-1000\Control Panel\International\Geo\Nation	cmd.exe
Key value queried	\REGISTRY\USER\S-1-5-21-857544305-989156968-2929034274-1000\Control Panel\International\Geo\Nation	svchost.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\08D439F05E7CC6A92305A91F0A6E046E.lnk	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\08D439F05E7CC6A92305A91F0A6E046E.lnk	svchost.exe

Executes dropped EXE 3 IoCs

pid	Process
3500	svchost.exe
916	08D439F05E7CC6A92305A91F0A6E046E
4348	08D439F05E7CC6A92305A91F0A6E046E

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-1-5-21-857544305-989156968-2929034274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\08D439F05E7CC6A92305A91F0A6E046E = "C:\\Users\\Admin\\AppData\\Local\\Temp\\08D439F05E7CC6A92305A91F0A6E046E"	svchost.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
12	pastebin.com
13	pastebin.com

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

System Information Discovery
T1082

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
2688	schtasks.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
532	powershell.exe
532	powershell.exe
4960	powershell.exe
4960	powershell.exe
3088	powershell.exe
3088	powershell.exe
5004	powershell.exe
5004	powershell.exe
1756	powershell.exe
1756	powershell.exe
1604	powershell.exe
1604	powershell.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeDebugPrivilege	4204	cmd.exe
Token: SeDebugPrivilege	532	powershell.exe
Token: SeDebugPrivilege	4960	powershell.exe
Token: SeDebugPrivilege	3500	svchost.exe
Token: SeDebugPrivilege	3088	powershell.exe
Token: SeDebugPrivilege	5004	powershell.exe
Token: SeDebugPrivilege	1756	powershell.exe
Token: SeDebugPrivilege	1604	powershell.exe
Token: SeDebugPrivilege	916	08D439F05E7CC6A92305A91F0A6E046E
Token: SeDebugPrivilege	4348	08D439F05E7CC6A92305A91F0A6E046E

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4204 wrote to memory of 532	4204	cmd.exe	83
PID 4204 wrote to memory of 532	4204	cmd.exe	83
PID 4204 wrote to memory of 4960	4204	cmd.exe	88
PID 4204 wrote to memory of 4960	4204	cmd.exe	88
PID 3500 wrote to memory of 3088	3500	svchost.exe	91
PID 3500 wrote to memory of 3088	3500	svchost.exe	91
PID 3500 wrote to memory of 5004	3500	svchost.exe	93
PID 3500 wrote to memory of 5004	3500	svchost.exe	93
PID 3500 wrote to memory of 1756	3500	svchost.exe	95
PID 3500 wrote to memory of 1756	3500	svchost.exe	95
PID 3500 wrote to memory of 1604	3500	svchost.exe	97
PID 3500 wrote to memory of 1604	3500	svchost.exe	97
PID 3500 wrote to memory of 2688	3500	svchost.exe	99
PID 3500 wrote to memory of 2688	3500	svchost.exe	99

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\cmd.exe
"C:\Users\Admin\AppData\Local\Temp\cmd.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4204
- 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\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:532
- 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:4960

C:\Users\Admin\AppData\Local\Temp\svchost.exe
C:\Users\Admin\AppData\Local\Temp\svchost.exe
1⤵
- Checks computer location settings
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3500
- 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\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3088
- 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:5004
- 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\08D439F05E7CC6A92305A91F0A6E046E'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1756
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '08D439F05E7CC6A92305A91F0A6E046E'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1604
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "08D439F05E7CC6A92305A91F0A6E046E" /tr "C:\Users\Admin\AppData\Local\Temp\08D439F05E7CC6A92305A91F0A6E046E"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2688

C:\Users\Admin\AppData\Local\Temp\08D439F05E7CC6A92305A91F0A6E046E
C:\Users\Admin\AppData\Local\Temp\08D439F05E7CC6A92305A91F0A6E046E
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:916

C:\Users\Admin\AppData\Local\Temp\08D439F05E7CC6A92305A91F0A6E046E
C:\Users\Admin\AppData\Local\Temp\08D439F05E7CC6A92305A91F0A6E046E
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4348

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

Web Service

T1102

Exfiltration

Impact

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Downloads

08D439F05E7CC6A92305A91F0A6E046E.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\08D439F05E7CC6A92305A91F0A6E046E.log
Size 1KB
SHA256 471356f5b299eaaaf1856e0f3d93a94c68321a326f5210a952e93ddb3848647c
MD5 fe1d7aaec1f8e21554b2dea87bb42a6e
SHA1 950dd9254713ada2269bd96aaf12a08c4828f0bc
SHA512 7ada22e7d6902659e998ef5e3987ace84f79533dc42696a20aa7a75d21b5a1fcc70076ec85b0951ac72880947083ce4854eeae64ea0b614fbdac369dfe52e01d
MD5 SHA1 SHA512

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powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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