xworm | ff43049677c57277f12a1d97f02af3029d7b75b5ad40303a28f1b0452997969d

General

Target

ya.exe
Size

63KB
MD5

222c2d239f4c8a1d73c736c9cc712807
SHA1

c3aa61bd6f8cc640bcfa74c40d9283c9c08c7b3c
SHA256

ff43049677c57277f12a1d97f02af3029d7b75b5ad40303a28f1b0452997969d
SHA512

1f2fea85e45e93916306c234b916d6b4b200dac9656e44f4555f825dd8677cb5e927bd5e7a74bf2fb2f6972a3e6e2d294a6104add162ba3d53a0e6cfedef6a02
SSDEEP

1536:tJc/5q1qoR5PDdAZcIED4VuCkbFybjQ9f0jQRmONww+W:7c/iqoJekbFEQ9W+mONP+W

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:23638

209.25.140.1:5525:23638

bring-recorder.gl.at.ply.gg:23638

action-yesterday.gl.at.ply.gg:23638

147.185.221.19:23638

then-wheel.gl.at.ply.gg::23638

then-wheel.gl.at.ply.gg:23638

teen-modes.gl.at.ply.gg:23638

Attributes

Install_directory
%LocalAppData%
install_file
uwumonster.exe

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4636-0-0x0000000000580000-0x0000000000596000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Local\uwumonster.exe	family_xworm

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

Processes:

ya.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation ya.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation	ya.exe

Drops startup file 2 IoCs

Processes:

ya.exe

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

Executes dropped EXE 3 IoCs

Processes:

uwumonster.exeuwumonster.exeuwumonster.exe

pid process

4192 uwumonster.exe
1060 uwumonster.exe
4872 uwumonster.exe

pid	process
4192	uwumonster.exe
1060	uwumonster.exe
4872	uwumonster.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

ya.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2860750803-256193626-1801997576-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\uwumonster = "C:\\Users\\Admin\\AppData\\Local\\uwumonster.exe"	ya.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

5024 schtasks.exe

pid	process
5024	schtasks.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

ya.exeuwumonster.exeuwumonster.exeuwumonster.exe

description	pid	process
Token: SeDebugPrivilege	4636	ya.exe
Token: SeDebugPrivilege	4636	ya.exe
Token: SeDebugPrivilege	4192	uwumonster.exe
Token: SeDebugPrivilege	1060	uwumonster.exe
Token: SeDebugPrivilege	4872	uwumonster.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

ya.exe

description pid process target process

PID 4636 wrote to memory of 5024 4636 ya.exe schtasks.exe
PID 4636 wrote to memory of 5024 4636 ya.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

description	pid	process	target process
PID 4636 wrote to memory of 5024	4636	ya.exe	schtasks.exe
PID 4636 wrote to memory of 5024	4636	ya.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\ya.exe
"C:\Users\Admin\AppData\Local\Temp\ya.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4636

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "uwumonster" /tr "C:\Users\Admin\AppData\Local\uwumonster.exe"
2⤵
- Creates scheduled task(s)
PID:5024

C:\Users\Admin\AppData\Local\uwumonster.exe
C:\Users\Admin\AppData\Local\uwumonster.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4192

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1632

C:\Users\Admin\AppData\Local\uwumonster.exe
C:\Users\Admin\AppData\Local\uwumonster.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1060

C:\Users\Admin\AppData\Local\uwumonster.exe
C:\Users\Admin\AppData\Local\uwumonster.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4872

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

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

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\uwumonster.exe
Filesize
63KB

MD5
222c2d239f4c8a1d73c736c9cc712807

SHA1
c3aa61bd6f8cc640bcfa74c40d9283c9c08c7b3c

SHA256
ff43049677c57277f12a1d97f02af3029d7b75b5ad40303a28f1b0452997969d

SHA512
1f2fea85e45e93916306c234b916d6b4b200dac9656e44f4555f825dd8677cb5e927bd5e7a74bf2fb2f6972a3e6e2d294a6104add162ba3d53a0e6cfedef6a02

Download Submit
memory/4192-11-0x00007FF9543D0000-0x00007FF954E91000-memory.dmp

Filesize
10.8MB

Download
memory/4192-13-0x00007FF9543D0000-0x00007FF954E91000-memory.dmp

Filesize
10.8MB

Download
memory/4636-0-0x0000000000580000-0x0000000000596000-memory.dmp

Filesize
88KB

Download
memory/4636-1-0x00007FF9543D0000-0x00007FF954E91000-memory.dmp

Filesize
10.8MB

Download
memory/4636-6-0x000000001B230000-0x000000001B240000-memory.dmp

Filesize
64KB

Download
memory/4636-7-0x00007FF9543D0000-0x00007FF954E91000-memory.dmp

Filesize
10.8MB

Download
memory/4636-8-0x000000001B230000-0x000000001B240000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads