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 5 IoCs

resource	yara_rule
behavioral1/memory/2220-0-0x0000000000830000-0x0000000000846000-memory.dmp	family_xworm
behavioral1/files/0x0009000000016d24-8.dat	family_xworm
behavioral1/memory/2244-10-0x0000000000DE0000-0x0000000000DF6000-memory.dmp	family_xworm
behavioral1/memory/2560-16-0x00000000003C0000-0x00000000003D6000-memory.dmp	family_xworm
behavioral1/memory/1640-20-0x0000000000850000-0x0000000000866000-memory.dmp	family_xworm

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

Drops startup file 2 IoCs

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

pid	Process
2244	uwumonster.exe
2560	uwumonster.exe
1640	uwumonster.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-1-5-21-330940541-141609230-1670313778-1000\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

pid	Process
2348	schtasks.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2220	ya.exe
Token: SeDebugPrivilege	2220	ya.exe
Token: SeDebugPrivilege	2244	uwumonster.exe
Token: SeDebugPrivilege	2560	uwumonster.exe
Token: SeDebugPrivilege	1640	uwumonster.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2220 wrote to memory of 2348	2220	ya.exe	30
PID 2220 wrote to memory of 2348	2220	ya.exe	30
PID 2220 wrote to memory of 2348	2220	ya.exe	30
PID 1276 wrote to memory of 2244	1276	taskeng.exe	33
PID 1276 wrote to memory of 2244	1276	taskeng.exe	33
PID 1276 wrote to memory of 2244	1276	taskeng.exe	33
PID 1276 wrote to memory of 2560	1276	taskeng.exe	35
PID 1276 wrote to memory of 2560	1276	taskeng.exe	35
PID 1276 wrote to memory of 2560	1276	taskeng.exe	35
PID 1276 wrote to memory of 1640	1276	taskeng.exe	36
PID 1276 wrote to memory of 1640	1276	taskeng.exe	36
PID 1276 wrote to memory of 1640	1276	taskeng.exe	36

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\ya.exe
"C:\Users\Admin\AppData\Local\Temp\ya.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2220
- 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:2348

C:\Windows\system32\taskeng.exe
taskeng.exe {F0988B4D-09F6-4F78-9062-6641B58E5F7A} S-1-5-21-330940541-141609230-1670313778-1000:KXIPPCKF\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1276
- C:\Users\Admin\AppData\Local\uwumonster.exe
  C:\Users\Admin\AppData\Local\uwumonster.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2244
- C:\Users\Admin\AppData\Local\uwumonster.exe
  C:\Users\Admin\AppData\Local\uwumonster.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2560
- C:\Users\Admin\AppData\Local\uwumonster.exe
  C:\Users\Admin\AppData\Local\uwumonster.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1640

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\uwumonster.exe

Filesize
63KB

MD5
222c2d239f4c8a1d73c736c9cc712807

SHA1
c3aa61bd6f8cc640bcfa74c40d9283c9c08c7b3c

SHA256
ff43049677c57277f12a1d97f02af3029d7b75b5ad40303a28f1b0452997969d

SHA512
1f2fea85e45e93916306c234b916d6b4b200dac9656e44f4555f825dd8677cb5e927bd5e7a74bf2fb2f6972a3e6e2d294a6104add162ba3d53a0e6cfedef6a02

Download Submit
memory/1640-20-0x0000000000850000-0x0000000000866000-memory.dmp

Filesize
88KB

Download
memory/1640-22-0x000007FEF64E0000-0x000007FEF6ECC000-memory.dmp

Filesize
9.9MB

Download
memory/1640-21-0x000007FEF64E0000-0x000007FEF6ECC000-memory.dmp

Filesize
9.9MB

Download
memory/2220-12-0x000007FEF64E0000-0x000007FEF6ECC000-memory.dmp

Filesize
9.9MB

Download
memory/2220-0-0x0000000000830000-0x0000000000846000-memory.dmp

Filesize
88KB

Download
memory/2220-6-0x000000001B6A0000-0x000000001B720000-memory.dmp

Filesize
512KB

Download
memory/2220-1-0x000007FEF64E0000-0x000007FEF6ECC000-memory.dmp

Filesize
9.9MB

Download
memory/2244-11-0x000007FEF64E0000-0x000007FEF6ECC000-memory.dmp

Filesize
9.9MB

Download
memory/2244-13-0x000007FEF64E0000-0x000007FEF6ECC000-memory.dmp

Filesize
9.9MB

Download
memory/2244-10-0x0000000000DE0000-0x0000000000DF6000-memory.dmp

Filesize
88KB

Download
memory/2560-16-0x00000000003C0000-0x00000000003D6000-memory.dmp

Filesize
88KB

Download
memory/2560-17-0x000007FEF64E0000-0x000007FEF6ECC000-memory.dmp

Filesize
9.9MB

Download
memory/2560-18-0x000007FEF64E0000-0x000007FEF6ECC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads