xworm | 6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675

General

Target

6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe
Size

298KB
MD5

d908287270d335c7367de6fb6fa3fc88
SHA1

bc824dfb5b888d7a2f9dcd4eee6c70a4b60d6fc1
SHA256

6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675
SHA512

0a591375294b4cccc619a7a9fd4edcc25c5ddaade7e08225b63e03ecef3b6124580366c8b8552744e60572cbcfc9ad759b16a1b8487feadc5ac73c48185d2012
SSDEEP

3072:pzFFqjpK3+yPKbWNtYjV/cPftqOjD1G3F/ibuNL:pzFFSKOyybWrYjOPFj

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:1604

Attributes

Install_directory
%AppData%
install_file
System.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2268-1-0x0000000000D80000-0x0000000000DD0000-memory.dmp	family_xworm
behavioral1/files/0x001000000001228d-35.dat	family_xworm
behavioral1/memory/1732-37-0x0000000001290000-0x00000000012E0000-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 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2872	powershell.exe
2616	powershell.exe
1436	powershell.exe
2192	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\System.lnk	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\System.lnk	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe

Executes dropped EXE 2 IoCs

pid	Process
1732	System.exe
2000	System.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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\System = "C:\\Users\\Admin\\AppData\\Roaming\\System.exe"	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.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

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
1280	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2872	powershell.exe
2616	powershell.exe
1436	powershell.exe
2192	powershell.exe
2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe
Token: SeDebugPrivilege	2872	powershell.exe
Token: SeDebugPrivilege	2616	powershell.exe
Token: SeDebugPrivilege	1436	powershell.exe
Token: SeDebugPrivilege	2192	powershell.exe
Token: SeDebugPrivilege	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe
Token: SeDebugPrivilege	1732	System.exe
Token: SeDebugPrivilege	2000	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2268 wrote to memory of 2872	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	32
PID 2268 wrote to memory of 2872	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	32
PID 2268 wrote to memory of 2872	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	32
PID 2268 wrote to memory of 2616	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	34
PID 2268 wrote to memory of 2616	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	34
PID 2268 wrote to memory of 2616	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	34
PID 2268 wrote to memory of 1436	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	36
PID 2268 wrote to memory of 1436	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	36
PID 2268 wrote to memory of 1436	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	36
PID 2268 wrote to memory of 2192	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	38
PID 2268 wrote to memory of 2192	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	38
PID 2268 wrote to memory of 2192	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	38
PID 2268 wrote to memory of 1280	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	40
PID 2268 wrote to memory of 1280	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	40
PID 2268 wrote to memory of 1280	2268	6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe	40
PID 2536 wrote to memory of 1732	2536	taskeng.exe	43
PID 2536 wrote to memory of 1732	2536	taskeng.exe	43
PID 2536 wrote to memory of 1732	2536	taskeng.exe	43
PID 2536 wrote to memory of 2000	2536	taskeng.exe	45
PID 2536 wrote to memory of 2000	2536	taskeng.exe	45
PID 2536 wrote to memory of 2000	2536	taskeng.exe	45

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\6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe
"C:\Users\Admin\AppData\Local\Temp\6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2268
- 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\6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2872
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2616
- 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\System.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1436
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'System.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2192
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "System" /tr "C:\Users\Admin\AppData\Roaming\System.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1280

C:\Windows\system32\taskeng.exe
taskeng.exe {A5AC735F-7CEE-4F75-A422-DF7148C5DA2E} S-1-5-21-1846800975-3917212583-2893086201-1000:ZQABOPWE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2536
- C:\Users\Admin\AppData\Roaming\System.exe
  C:\Users\Admin\AppData\Roaming\System.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1732
- C:\Users\Admin\AppData\Roaming\System.exe
  C:\Users\Admin\AppData\Roaming\System.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2000

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

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
8de314d96314a5c410e035a0f75723fd

SHA1
3ebce9e7530ca6966283863df98986e438498f4e

SHA256
71ccc0e4709130f617f0e151575654b5d9289c82dc775e3087e8b9cdffd6cb08

SHA512
fd862ff87b6c8a84cc3340bc36784b26dd875720a7f975250cc0b76a6806420b83954041565ed709d56543c22f83bc9968c5a6e16df798492fd5defe0913b703

Download Submit
C:\Users\Admin\AppData\Roaming\System.exe

Filesize
298KB

MD5
d908287270d335c7367de6fb6fa3fc88

SHA1
bc824dfb5b888d7a2f9dcd4eee6c70a4b60d6fc1

SHA256
6f8ffa3bd73d59f63ba0c8825e1ff2d9a55607e5ac8cd524350a6c4f51b28675

SHA512
0a591375294b4cccc619a7a9fd4edcc25c5ddaade7e08225b63e03ecef3b6124580366c8b8552744e60572cbcfc9ad759b16a1b8487feadc5ac73c48185d2012

Download Submit
memory/1732-37-0x0000000001290000-0x00000000012E0000-memory.dmp

Filesize
320KB

Download
memory/2268-2-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

Filesize
9.9MB

Download
memory/2268-0-0x000007FEF5EB3000-0x000007FEF5EB4000-memory.dmp

Filesize
4KB

Download
memory/2268-28-0x000007FEF5EB3000-0x000007FEF5EB4000-memory.dmp

Filesize
4KB

Download
memory/2268-33-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

Filesize
9.9MB

Download
memory/2268-1-0x0000000000D80000-0x0000000000DD0000-memory.dmp

Filesize
320KB

Download
memory/2616-15-0x000000001B730000-0x000000001BA12000-memory.dmp

Filesize
2.9MB

Download
memory/2616-16-0x0000000001DA0000-0x0000000001DA8000-memory.dmp

Filesize
32KB

Download
memory/2872-7-0x0000000002E10000-0x0000000002E90000-memory.dmp

Filesize
512KB

Download
memory/2872-8-0x000000001B770000-0x000000001BA52000-memory.dmp

Filesize
2.9MB

Download
memory/2872-9-0x00000000022A0000-0x00000000022A8000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads