xworm | feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f

General

Target

3ab61ee8a81099edddf87af587420a10N.exe
Size

40KB
MD5

3ab61ee8a81099edddf87af587420a10
SHA1

d6c0f6f60d13cc786cf7ac0df2c45b5dc47b945c
SHA256

feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f
SHA512

f43326c79ea8bd118fd90efc8c2c8306e02901727ffd7c6666b2a35820eb8799976007f4886a68a7f411509ad61dcf7ddf5a3630fa5342014ad5aa978818ff3f
SSDEEP

768:pNfPMSk3K/EzTb/008WuFZ4ZJF5PC9O9Fy68OMhi3/aV:nf05a/CTjp89IFc9Uc68OMsi

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

154.197.69.165:7000

Mutex

jcTVbnlMjCEJAYCp

Attributes

Install_directory
%AppData%
install_file
crss.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/1140-1-0x0000000000D30000-0x0000000000D40000-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
2268	powershell.exe
532	powershell.exe
2316	powershell.exe
2900	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crss.lnk	3ab61ee8a81099edddf87af587420a10N.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crss.lnk	3ab61ee8a81099edddf87af587420a10N.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

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2316	powershell.exe
2900	powershell.exe
2268	powershell.exe
532	powershell.exe
1140	3ab61ee8a81099edddf87af587420a10N.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1140	3ab61ee8a81099edddf87af587420a10N.exe
Token: SeDebugPrivilege	2316	powershell.exe
Token: SeDebugPrivilege	2900	powershell.exe
Token: SeDebugPrivilege	2268	powershell.exe
Token: SeDebugPrivilege	532	powershell.exe
Token: SeDebugPrivilege	1140	3ab61ee8a81099edddf87af587420a10N.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1140	3ab61ee8a81099edddf87af587420a10N.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1140 wrote to memory of 2316	1140	3ab61ee8a81099edddf87af587420a10N.exe	31
PID 1140 wrote to memory of 2316	1140	3ab61ee8a81099edddf87af587420a10N.exe	31
PID 1140 wrote to memory of 2316	1140	3ab61ee8a81099edddf87af587420a10N.exe	31
PID 1140 wrote to memory of 2900	1140	3ab61ee8a81099edddf87af587420a10N.exe	33
PID 1140 wrote to memory of 2900	1140	3ab61ee8a81099edddf87af587420a10N.exe	33
PID 1140 wrote to memory of 2900	1140	3ab61ee8a81099edddf87af587420a10N.exe	33
PID 1140 wrote to memory of 2268	1140	3ab61ee8a81099edddf87af587420a10N.exe	35
PID 1140 wrote to memory of 2268	1140	3ab61ee8a81099edddf87af587420a10N.exe	35
PID 1140 wrote to memory of 2268	1140	3ab61ee8a81099edddf87af587420a10N.exe	35
PID 1140 wrote to memory of 532	1140	3ab61ee8a81099edddf87af587420a10N.exe	37
PID 1140 wrote to memory of 532	1140	3ab61ee8a81099edddf87af587420a10N.exe	37
PID 1140 wrote to memory of 532	1140	3ab61ee8a81099edddf87af587420a10N.exe	37

C:\Users\Admin\AppData\Local\Temp\3ab61ee8a81099edddf87af587420a10N.exe
"C:\Users\Admin\AppData\Local\Temp\3ab61ee8a81099edddf87af587420a10N.exe"
1⤵
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1140
- 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\3ab61ee8a81099edddf87af587420a10N.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2316
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '3ab61ee8a81099edddf87af587420a10N.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2900
- 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\crss.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2268
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'crss.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:532

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
7KB

MD5
00eccad1d0e6128e467ab2917c4fcce4

SHA1
cebc87a3a56fb4cd71c712b7e3cac12c3da82355

SHA256
06347a203cafe238a7dc0f9e3108098fc05f5bc10dd363d2d3b6856534d9f752

SHA512
6845b431a36f1d296d34396e29c6cd87e4c748a1ad246d287c21cc65b6f2f664f8418f3d84d2eab1cce4c46099189aebf657e68c097ddcf7799e39424a69234d

Download Submit
memory/1140-0-0x000007FEF5663000-0x000007FEF5664000-memory.dmp

Filesize
4KB

Download
memory/1140-1-0x0000000000D30000-0x0000000000D40000-memory.dmp

Filesize
64KB

Download
memory/1140-2-0x000007FEF5660000-0x000007FEF604C000-memory.dmp

Filesize
9.9MB

Download
memory/1140-9-0x000007FEF5663000-0x000007FEF5664000-memory.dmp

Filesize
4KB

Download
memory/1140-32-0x000007FEF5660000-0x000007FEF604C000-memory.dmp

Filesize
9.9MB

Download
memory/2316-7-0x000000001B1D0000-0x000000001B4B2000-memory.dmp

Filesize
2.9MB

Download
memory/2316-8-0x0000000002490000-0x0000000002498000-memory.dmp

Filesize
32KB

Download
memory/2900-15-0x000000001B2D0000-0x000000001B5B2000-memory.dmp

Filesize
2.9MB

Download
memory/2900-16-0x0000000002090000-0x0000000002098000-memory.dmp

Filesize
32KB

Download

Analysis

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