xworm | b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
01-07-2024 01:42

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General

Target

b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe
Size

108KB
MD5

557caa60b4c2b17a6ddd4da49d778b33
SHA1

f5f12131479f08e4305ab9b51ba415d72ccb28c1
SHA256

b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f
SHA512

7e6113a678fe35109432e7767492f9cd91b7cdb042af2cc36d70973efaa7cf131270b16209a107ab3da158723d03791910977f53c7640c67fcf59bd37d2626d1
SSDEEP

1536:lIs9UNbZlC6wdGNKZpPNb3JWoDTUa6PvaiOAfViA6X:lIAoLpaG4pNb36bX1OAfkAw

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

193.161.193.99:51146

Attributes

Install_directory
%AppData%
install_file
USB.exe
telegram
https://api.telegram.org/bot6701075763:AAGkvv2CpqBxGihH8FtOkSA7Uxy35GZpAFI/sendMessage?chat_id=5991331733

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2508-1-0x0000000000900000-0x0000000000920000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Roaming\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe	family_xworm

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

Detects Windows executables referencing non-Windows User-Agents 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2508-1-0x0000000000900000-0x0000000000920000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
C:\Users\Admin\AppData\Roaming\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects executables using Telegram Chat Bot 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2508-1-0x0000000000900000-0x0000000000920000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_TelegramChatBot
C:\Users\Admin\AppData\Roaming\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe	INDICATOR_SUSPICIOUS_EXE_TelegramChatBot

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

Processes:

b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

Drops startup file 2 IoCs

Processes:

b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.lnk	b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.lnk	b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

Executes dropped EXE 2 IoCs

Processes:

b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exeb381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

pid process

5024 b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe
3660 b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

pid	process
5024	b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe
3660	b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f = "C:\\Users\\Admin\\AppData\\Roaming\\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe"	b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.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.

Processes:

flow ioc

2 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

Processes:

schtasks.exe

pid process

4524 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

pid process

2508 b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

flow	ioc
2	ip-api.com

pid	process
4524	schtasks.exe

pid	process
2508	b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exeb381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exeb381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

description	pid	process
Token: SeDebugPrivilege	2508	b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe
Token: SeDebugPrivilege	2508	b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe
Token: SeDebugPrivilege	5024	b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe
Token: SeDebugPrivilege	3660	b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

pid process

2508 b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

pid	process
2508	b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe

description	pid	process	target process
PID 2508 wrote to memory of 4524	2508	b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe	schtasks.exe
PID 2508 wrote to memory of 4524	2508	b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe	schtasks.exe

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\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe
"C:\Users\Admin\AppData\Local\Temp\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.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:2508

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f" /tr "C:\Users\Admin\AppData\Roaming\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe"
2⤵
- Scheduled Task/Job: Scheduled Task
PID:4524

C:\Users\Admin\AppData\Roaming\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe
C:\Users\Admin\AppData\Roaming\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5024

C:\Users\Admin\AppData\Roaming\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe
C:\Users\Admin\AppData\Roaming\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3660

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe.log
Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Roaming\b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f.exe
Filesize
108KB

MD5
557caa60b4c2b17a6ddd4da49d778b33

SHA1
f5f12131479f08e4305ab9b51ba415d72ccb28c1

SHA256
b381f1f4bad4016f464ceb92aeb9dda3b696411d913ea7f3bbc774b67076c43f

SHA512
7e6113a678fe35109432e7767492f9cd91b7cdb042af2cc36d70973efaa7cf131270b16209a107ab3da158723d03791910977f53c7640c67fcf59bd37d2626d1

Download Submit
memory/2508-1-0x0000000000900000-0x0000000000920000-memory.dmp

Filesize
128KB

Download
memory/2508-0-0x00007FF9A8013000-0x00007FF9A8015000-memory.dmp

Filesize
8KB

Download
memory/2508-2-0x00007FF9A8010000-0x00007FF9A8AD1000-memory.dmp

Filesize
10.8MB

Download
memory/2508-11-0x00007FF9A8010000-0x00007FF9A8AD1000-memory.dmp

Filesize
10.8MB

Download
memory/5024-14-0x00007FF9A8010000-0x00007FF9A8AD1000-memory.dmp

Filesize
10.8MB

Download
memory/5024-16-0x00007FF9A8010000-0x00007FF9A8AD1000-memory.dmp

Filesize
10.8MB

Download