xworm | 1a1a2ef3e0060ed1cff4c3af265705e04a0b227321946461778c1e81616e770b

General

Target

fuckd.exe
Size

67KB
MD5

ad1e05ad9933986e699e2313a067a02d
SHA1

9e4f60f224eb0957124b62f4836a87105cf2449c
SHA256

1a1a2ef3e0060ed1cff4c3af265705e04a0b227321946461778c1e81616e770b
SHA512

c2de8f0d328b730360e816bf06ed71a8cbdc7d1debe6c1148ec2d97c8aac7c12e6fef8270d6139f46b1ad9c604d3660069c61b18d29df90649e2c9c6f9576da0
SSDEEP

1536:li36LmfKSmF8aczrknSb1bxzAoWFOc6I3YONygapcZ:lqo9SmYMSb1VaYONyMZ

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

period-preview.gl.at.ply.gg:62237

Attributes

Install_directory
%ProgramData%
install_file
USB.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2288-1-0x0000000001300000-0x0000000001318000-memory.dmp	family_xworm
behavioral1/files/0x000a000000004e74-30.dat	family_xworm
behavioral1/memory/3032-36-0x0000000000BF0000-0x0000000000C08000-memory.dmp	family_xworm
behavioral1/memory/1464-39-0x0000000000080000-0x0000000000098000-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 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2184	powershell.exe
2556	powershell.exe
1136	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
3032	fuckd.exe
1464	fuckd.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\fuckd = "C:\\ProgramData\\fuckd.exe"	fuckd.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

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8	fuckd.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	fuckd.exe

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
2092	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2184	powershell.exe
2556	powershell.exe
1136	powershell.exe
2288	fuckd.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2288	fuckd.exe
Token: SeDebugPrivilege	2184	powershell.exe
Token: SeDebugPrivilege	2556	powershell.exe
Token: SeDebugPrivilege	1136	powershell.exe
Token: SeDebugPrivilege	2288	fuckd.exe
Token: SeDebugPrivilege	3032	fuckd.exe
Token: SeDebugPrivilege	1464	fuckd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2288	fuckd.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2288 wrote to memory of 2184	2288	fuckd.exe	31
PID 2288 wrote to memory of 2184	2288	fuckd.exe	31
PID 2288 wrote to memory of 2184	2288	fuckd.exe	31
PID 2288 wrote to memory of 2556	2288	fuckd.exe	33
PID 2288 wrote to memory of 2556	2288	fuckd.exe	33
PID 2288 wrote to memory of 2556	2288	fuckd.exe	33
PID 2288 wrote to memory of 1136	2288	fuckd.exe	35
PID 2288 wrote to memory of 1136	2288	fuckd.exe	35
PID 2288 wrote to memory of 1136	2288	fuckd.exe	35
PID 2288 wrote to memory of 2092	2288	fuckd.exe	37
PID 2288 wrote to memory of 2092	2288	fuckd.exe	37
PID 2288 wrote to memory of 2092	2288	fuckd.exe	37
PID 1140 wrote to memory of 3032	1140	taskeng.exe	41
PID 1140 wrote to memory of 3032	1140	taskeng.exe	41
PID 1140 wrote to memory of 3032	1140	taskeng.exe	41
PID 1140 wrote to memory of 1464	1140	taskeng.exe	42
PID 1140 wrote to memory of 1464	1140	taskeng.exe	42
PID 1140 wrote to memory of 1464	1140	taskeng.exe	42

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\fuckd.exe
"C:\Users\Admin\AppData\Local\Temp\fuckd.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2288
- 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\fuckd.exe'
  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 'fuckd.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2556
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\fuckd.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1136
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "fuckd" /tr "C:\ProgramData\fuckd.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2092

C:\Windows\system32\taskeng.exe
taskeng.exe {0BA79363-5F19-4572-A2D9-8E63574BB92D} S-1-5-21-3290804112-2823094203-3137964600-1000:VORHPBAB\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1140
- C:\ProgramData\fuckd.exe
  C:\ProgramData\fuckd.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3032
- C:\ProgramData\fuckd.exe
  C:\ProgramData\fuckd.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1464

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

2

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

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:\ProgramData\fuckd.exe

Filesize
67KB

MD5
ad1e05ad9933986e699e2313a067a02d

SHA1
9e4f60f224eb0957124b62f4836a87105cf2449c

SHA256
1a1a2ef3e0060ed1cff4c3af265705e04a0b227321946461778c1e81616e770b

SHA512
c2de8f0d328b730360e816bf06ed71a8cbdc7d1debe6c1148ec2d97c8aac7c12e6fef8270d6139f46b1ad9c604d3660069c61b18d29df90649e2c9c6f9576da0

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
31d9565d0b05315c6ab0792ddca8a46f

SHA1
2a459f79f42cb936fb8a9471a8a6cb553429694c

SHA256
b944d05c9fe4721daab18fc933ff7febfb1c7efa9298ab66d8053e7ea904b081

SHA512
80a208e4b4bd3e7d107140195f072b6531a55cd45727499b9ca28cf96c327af44833a8796e5fc5312021839ad60fe11f3ad59f4ef3d1799c89a44dbc765090ad

Download Submit
memory/1464-39-0x0000000000080000-0x0000000000098000-memory.dmp

Filesize
96KB

Download
memory/2184-7-0x0000000002D60000-0x0000000002DE0000-memory.dmp

Filesize
512KB

Download
memory/2184-8-0x000000001B4B0000-0x000000001B792000-memory.dmp

Filesize
2.9MB

Download
memory/2184-9-0x0000000000460000-0x0000000000468000-memory.dmp

Filesize
32KB

Download
memory/2288-2-0x000007FEF55D0000-0x000007FEF5FBC000-memory.dmp

Filesize
9.9MB

Download
memory/2288-0-0x000007FEF55D3000-0x000007FEF55D4000-memory.dmp

Filesize
4KB

Download
memory/2288-25-0x000007FEF55D3000-0x000007FEF55D4000-memory.dmp

Filesize
4KB

Download
memory/2288-1-0x0000000001300000-0x0000000001318000-memory.dmp

Filesize
96KB

Download
memory/2288-32-0x000007FEF55D0000-0x000007FEF5FBC000-memory.dmp

Filesize
9.9MB

Download
memory/2556-15-0x000000001B640000-0x000000001B922000-memory.dmp

Filesize
2.9MB

Download
memory/2556-16-0x00000000022D0000-0x00000000022D8000-memory.dmp

Filesize
32KB

Download
memory/3032-36-0x0000000000BF0000-0x0000000000C08000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads