xworm | 35b6f516e20f2d01dd638055decb824ee2d83d23d7d01fe010d92f22a0e38911

General

Target

KeyGen.exe
Size

71KB
MD5

7addd5b9c97fa34625567991ad42a6b0
SHA1

305a6af73234cb5d7c4fab4ecb35751af2977a8c
SHA256

35b6f516e20f2d01dd638055decb824ee2d83d23d7d01fe010d92f22a0e38911
SHA512

aca3379e929a38f61a3e096f74618fe761d2f0723d36f0e2bd2eb37f141e87cff5ea62bc9ab4deffc07c615f579a976951ee7393ee495b32a3d57a724a1072f7
SSDEEP

1536:VRLxhVj7D+Ihw3+bwxK0ZV6ypm6TNOQRu0US6Sd:Vb7hw3+bwxtQOOQRb0s

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:1139

w4wrzaq8l.localto.net:1139

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/1060-1-0x00000000010F0000-0x0000000001108000-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
3040	powershell.exe
2080	powershell.exe
2868	powershell.exe
2876	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Injector.lnk	KeyGen.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Injector.lnk	KeyGen.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-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\Injector = "C:\\Users\\Admin\\AppData\\Roaming\\Injector"	KeyGen.exe

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
3040	powershell.exe
2080	powershell.exe
2868	powershell.exe
2876	powershell.exe
1060	KeyGen.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1060	KeyGen.exe
Token: SeDebugPrivilege	3040	powershell.exe
Token: SeDebugPrivilege	2080	powershell.exe
Token: SeDebugPrivilege	2868	powershell.exe
Token: SeDebugPrivilege	2876	powershell.exe
Token: SeDebugPrivilege	1060	KeyGen.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1060	KeyGen.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1060 wrote to memory of 3040	1060	KeyGen.exe	30
PID 1060 wrote to memory of 3040	1060	KeyGen.exe	30
PID 1060 wrote to memory of 3040	1060	KeyGen.exe	30
PID 1060 wrote to memory of 2080	1060	KeyGen.exe	32
PID 1060 wrote to memory of 2080	1060	KeyGen.exe	32
PID 1060 wrote to memory of 2080	1060	KeyGen.exe	32
PID 1060 wrote to memory of 2868	1060	KeyGen.exe	34
PID 1060 wrote to memory of 2868	1060	KeyGen.exe	34
PID 1060 wrote to memory of 2868	1060	KeyGen.exe	34
PID 1060 wrote to memory of 2876	1060	KeyGen.exe	36
PID 1060 wrote to memory of 2876	1060	KeyGen.exe	36
PID 1060 wrote to memory of 2876	1060	KeyGen.exe	36

C:\Users\Admin\AppData\Local\Temp\KeyGen.exe
"C:\Users\Admin\AppData\Local\Temp\KeyGen.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1060
- 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\KeyGen.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3040
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'KeyGen.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2080
- 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\Injector'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2868
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Injector'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2876

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:3060

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

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
949dccd844d4e28f9fc8b9f29fe6b431

SHA1
0d8eb153b23810a0185afb370670db9ed0dc5827

SHA256
714b0b490702e291aa5d87c76221c5ca5c240dea07d2f716fc546cc6c1fb43a2

SHA512
d73a241eb613ea5b22ddb5c7833a236514fe91916becddd417b0f2d808056a38b5cd7f65a2645d419a1a33fcc45b520076c7c9552819bd1e6400fbdf3edb4efe

Download Submit
memory/1060-0-0x000007FEF5F13000-0x000007FEF5F14000-memory.dmp

Filesize
4KB

Download
memory/1060-1-0x00000000010F0000-0x0000000001108000-memory.dmp

Filesize
96KB

Download
memory/1060-29-0x000000001ABF0000-0x000000001AC70000-memory.dmp

Filesize
512KB

Download
memory/1060-30-0x000007FEF5F13000-0x000007FEF5F14000-memory.dmp

Filesize
4KB

Download
memory/1060-31-0x000000001ABF0000-0x000000001AC70000-memory.dmp

Filesize
512KB

Download
memory/2080-14-0x000000001B7C0000-0x000000001BAA2000-memory.dmp

Filesize
2.9MB

Download
memory/2080-15-0x0000000000410000-0x0000000000418000-memory.dmp

Filesize
32KB

Download
memory/3040-6-0x0000000001F60000-0x0000000001FE0000-memory.dmp

Filesize
512KB

Download
memory/3040-7-0x000000001B6C0000-0x000000001B9A2000-memory.dmp

Filesize
2.9MB

Download
memory/3040-8-0x0000000001D90000-0x0000000001D98000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads