xworm | e55752ce0e4bdc9426430bf580efd1559864d24c3c0f118d58ff513e6d618fd1

Analysis

max time kernel
119s
max time network
151s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
07/07/2024, 03:20

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General

Target

debugger.exe
Size

64KB
MD5

36969de6b4bf8de24684de1bb71f624f
SHA1

0327d7d9d7f739e4b09bab680249ed997a281c9b
SHA256

57035572212814c4666994f1a0d2b6955b0951a8f1e9e1686dead895de5f64cf
SHA512

cd8eae1b19c8ae9a2d22b999e85e86625a1e74630e6f3155ff63965b8f116e62f79dcc23b88c92f51fa42ee26f7bd87cad22a21f32f16306890576e309dfe548
SSDEEP

1536:TTodvW06WoBsscJSbigiYUVkaNW6PmqCO26erLq:UenWissBbigHmkaRmHO26erLq

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

79.110.49.233:4444

Attributes

Install_directory
%AppData%
install_file
VSREDIST.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral15/memory/2844-1-0x0000000001040000-0x0000000001056000-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
2456	powershell.exe
1720	powershell.exe
1324	powershell.exe
1368	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\VSREDIST.lnk	debugger.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\VSREDIST.lnk	debugger.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-1-5-21-3294248377-1418901787-4083263181-1000\Software\Microsoft\Windows\CurrentVersion\Run\VSREDIST = "C:\\Users\\Admin\\AppData\\Roaming\\VSREDIST.exe"	debugger.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
2	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 4 IoCs

pid	Process
1720	powershell.exe
1324	powershell.exe
1368	powershell.exe
2456	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2844	debugger.exe
Token: SeDebugPrivilege	1720	powershell.exe
Token: SeDebugPrivilege	1324	powershell.exe
Token: SeDebugPrivilege	1368	powershell.exe
Token: SeDebugPrivilege	2456	powershell.exe
Token: SeDebugPrivilege	2844	debugger.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2844 wrote to memory of 1720	2844	debugger.exe	31
PID 2844 wrote to memory of 1720	2844	debugger.exe	31
PID 2844 wrote to memory of 1720	2844	debugger.exe	31
PID 2844 wrote to memory of 1324	2844	debugger.exe	33
PID 2844 wrote to memory of 1324	2844	debugger.exe	33
PID 2844 wrote to memory of 1324	2844	debugger.exe	33
PID 2844 wrote to memory of 1368	2844	debugger.exe	35
PID 2844 wrote to memory of 1368	2844	debugger.exe	35
PID 2844 wrote to memory of 1368	2844	debugger.exe	35
PID 2844 wrote to memory of 2456	2844	debugger.exe	37
PID 2844 wrote to memory of 2456	2844	debugger.exe	37
PID 2844 wrote to memory of 2456	2844	debugger.exe	37

C:\Users\Admin\AppData\Local\Temp\debugger.exe
"C:\Users\Admin\AppData\Local\Temp\debugger.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2844
- 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\debugger.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1720
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'debugger.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1324
- 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\VSREDIST.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1368
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'VSREDIST.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2456

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

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
de1d844715fb8c9ed57ead738b2434ca

SHA1
e6b576c48f7dc1cc12cbf4e66a3add284e34becd

SHA256
17ce2ea723a4cb750d2cc014c9b738231205fd077498e52a2afdd435f9c50464

SHA512
91a2a5df133c1b6b8692fdfafff62d896f0903d1a36f7910af01aed8f78ecf82e3029996647049f66f11a61104b2a359c9da04dd63a4af8d5b7c5a943cd9527c

Download Submit
memory/1324-14-0x000000001B5D0000-0x000000001B8B2000-memory.dmp

Filesize
2.9MB

Download
memory/1324-15-0x0000000001E00000-0x0000000001E08000-memory.dmp

Filesize
32KB

Download
memory/1720-7-0x000000001B630000-0x000000001B912000-memory.dmp

Filesize
2.9MB

Download
memory/1720-8-0x0000000002390000-0x0000000002398000-memory.dmp

Filesize
32KB

Download
memory/2844-0-0x000007FEF5AB3000-0x000007FEF5AB4000-memory.dmp

Filesize
4KB

Download
memory/2844-1-0x0000000001040000-0x0000000001056000-memory.dmp

Filesize
88KB

Download
memory/2844-2-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/2844-31-0x000007FEF5AB3000-0x000007FEF5AB4000-memory.dmp

Filesize
4KB

Download
memory/2844-32-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download