xworm | 7743183018de756ca03523c24561a2cb868fc69e63ba01f4ff854cc11c3115ba

General

Target

SkibidiToilet.exe
Size

76KB
MD5

433edb87db3a82d14ba7d88ba87d3503
SHA1

bb2af0b83d7a55aa2d9ebd5e1d3d6f06f1fecc8c
SHA256

7743183018de756ca03523c24561a2cb868fc69e63ba01f4ff854cc11c3115ba
SHA512

858fe073ff5a015d4a51b8976d1e88dcb23504848fb07cc6f1cc5eeac6de91c615aa028de867f520b7bd59750f6a2633061aec96cf5766c18eda8103e16a0516
SSDEEP

1536:O1e1/zEY3vnxkoig5PBVDVfEHbqZYkcJzR72eP72X4HKzkO7C7ZGhLW:Pr3fxTPLh+bYX497MCO72Y1W

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%ProgramData%
install_file
Setup-x9035d.exe
pastebin_url
https://pastebin.com/raw/2zRWZhkX

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/1400-1-0x0000000000E60000-0x0000000000E7A000-memory.dmp	family_xworm
behavioral2/files/0x0007000000023cbe-7.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	SkibidiToilet.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Setup-x9035d.lnk	SkibidiToilet.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Setup-x9035d.lnk	SkibidiToilet.exe

Executes dropped EXE 3 IoCs

pid	Process
4772	Setup-x9035d.exe
1032	Setup-x9035d.exe
4996	Setup-x9035d.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-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Setup-x9035d = "C:\\ProgramData\\Setup-x9035d.exe"	SkibidiToilet.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
16	pastebin.com
17	pastebin.com

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
14	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
3588	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1400	SkibidiToilet.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1400	SkibidiToilet.exe
Token: SeDebugPrivilege	1400	SkibidiToilet.exe
Token: SeDebugPrivilege	4772	Setup-x9035d.exe
Token: SeDebugPrivilege	1032	Setup-x9035d.exe
Token: SeDebugPrivilege	4996	Setup-x9035d.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1400	SkibidiToilet.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1400 wrote to memory of 3588	1400	SkibidiToilet.exe	93
PID 1400 wrote to memory of 3588	1400	SkibidiToilet.exe	93

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\SkibidiToilet.exe
"C:\Users\Admin\AppData\Local\Temp\SkibidiToilet.exe"
1⤵
- Checks computer location settings
- 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:1400
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Setup-x9035d" /tr "C:\ProgramData\Setup-x9035d.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3588

C:\ProgramData\Setup-x9035d.exe
C:\ProgramData\Setup-x9035d.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4772

C:\ProgramData\Setup-x9035d.exe
C:\ProgramData\Setup-x9035d.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1032

C:\ProgramData\Setup-x9035d.exe
C:\ProgramData\Setup-x9035d.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\ProgramData\Setup-x9035d.exe

Filesize
76KB

MD5
433edb87db3a82d14ba7d88ba87d3503

SHA1
bb2af0b83d7a55aa2d9ebd5e1d3d6f06f1fecc8c

SHA256
7743183018de756ca03523c24561a2cb868fc69e63ba01f4ff854cc11c3115ba

SHA512
858fe073ff5a015d4a51b8976d1e88dcb23504848fb07cc6f1cc5eeac6de91c615aa028de867f520b7bd59750f6a2633061aec96cf5766c18eda8103e16a0516

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Setup-x9035d.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
memory/1400-0-0x00007FF9A4FC3000-0x00007FF9A4FC5000-memory.dmp

Filesize
8KB

Download
memory/1400-1-0x0000000000E60000-0x0000000000E7A000-memory.dmp

Filesize
104KB

Download
memory/1400-2-0x00007FF9A4FC0000-0x00007FF9A5A81000-memory.dmp

Filesize
10.8MB

Download
memory/1400-10-0x00007FF9A4FC0000-0x00007FF9A5A81000-memory.dmp

Filesize
10.8MB

Download
memory/4772-9-0x00007FF9A4FC0000-0x00007FF9A5A81000-memory.dmp

Filesize
10.8MB

Download
memory/4772-12-0x00007FF9A4FC0000-0x00007FF9A5A81000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads