xworm | e1ea405efb08d4a7d254423fc5b700021eb653b1545d120c0f6cf4ff31c7f0ae

Resubmissions

02/05/2024, 02:59

240502-dg26eshb97 10

02/05/2024, 02:36

240502-c3k9csef7t 10

Analysis

max time kernel
301s
max time network
306s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
02/05/2024, 02:59

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General

Target

a ton of ya/ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe
Size

63KB
MD5

222c2d239f4c8a1d73c736c9cc712807
SHA1

c3aa61bd6f8cc640bcfa74c40d9283c9c08c7b3c
SHA256

ff43049677c57277f12a1d97f02af3029d7b75b5ad40303a28f1b0452997969d
SHA512

1f2fea85e45e93916306c234b916d6b4b200dac9656e44f4555f825dd8677cb5e927bd5e7a74bf2fb2f6972a3e6e2d294a6104add162ba3d53a0e6cfedef6a02
SSDEEP

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

Score

10^/10

xworm bootkit persistence rat trojan

Malware Config

Extracted

Family

xworm

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

resource	yara_rule
behavioral2/memory/2332-1-0x0000000000210000-0x0000000000226000-memory.dmp	family_xworm
behavioral2/files/0x000800000002325d-8.dat	family_xworm

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

Checks computer location settings 2 TTPs 3 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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	seqrut.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	seqrut.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 12 IoCs

pid	Process
4024	uwumonster.exe
4816	uwumonster.exe
4356	uwumonster.exe
3372	uwumonster.exe
2712	seqrut.exe
2976	seqrut.exe
2108	seqrut.exe
2964	seqrut.exe
4964	seqrut.exe
2312	seqrut.exe
1872	seqrut.exe
2076	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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\uwumonster = "C:\\Users\\Admin\\AppData\\Local\\uwumonster.exe"	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	seqrut.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
2320	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2976	seqrut.exe
2976	seqrut.exe
2976	seqrut.exe
2976	seqrut.exe
2976	seqrut.exe
2976	seqrut.exe
2108	seqrut.exe
2108	seqrut.exe
2108	seqrut.exe
2108	seqrut.exe
2964	seqrut.exe
2964	seqrut.exe
2976	seqrut.exe
2976	seqrut.exe
2964	seqrut.exe
2964	seqrut.exe
2108	seqrut.exe
2108	seqrut.exe
2976	seqrut.exe
2976	seqrut.exe
4964	seqrut.exe
4964	seqrut.exe
2964	seqrut.exe
2964	seqrut.exe
2108	seqrut.exe
2108	seqrut.exe
2312	seqrut.exe
2312	seqrut.exe
4964	seqrut.exe
4964	seqrut.exe
2976	seqrut.exe
2976	seqrut.exe
4964	seqrut.exe
4964	seqrut.exe
2108	seqrut.exe
2108	seqrut.exe
2312	seqrut.exe
2312	seqrut.exe
2964	seqrut.exe
2964	seqrut.exe
2976	seqrut.exe
2976	seqrut.exe
4964	seqrut.exe
2108	seqrut.exe
4964	seqrut.exe
2108	seqrut.exe
2964	seqrut.exe
2312	seqrut.exe
2312	seqrut.exe
2964	seqrut.exe
2976	seqrut.exe
2976	seqrut.exe
4964	seqrut.exe
4964	seqrut.exe
2108	seqrut.exe
2312	seqrut.exe
2108	seqrut.exe
2312	seqrut.exe
2964	seqrut.exe
2964	seqrut.exe
2976	seqrut.exe
2976	seqrut.exe
2312	seqrut.exe
2312	seqrut.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2332	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe
Token: SeDebugPrivilege	2332	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe
Token: SeDebugPrivilege	4024	uwumonster.exe
Token: SeDebugPrivilege	4816	uwumonster.exe
Token: SeDebugPrivilege	4356	uwumonster.exe
Token: SeDebugPrivilege	3372	uwumonster.exe
Token: SeDebugPrivilege	2076	uwumonster.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2332 wrote to memory of 2320	2332	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe	90
PID 2332 wrote to memory of 2320	2332	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe	90
PID 2332 wrote to memory of 2712	2332	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe	105
PID 2332 wrote to memory of 2712	2332	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe	105
PID 2332 wrote to memory of 2712	2332	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe	105
PID 2712 wrote to memory of 2976	2712	seqrut.exe	106
PID 2712 wrote to memory of 2976	2712	seqrut.exe	106
PID 2712 wrote to memory of 2976	2712	seqrut.exe	106
PID 2712 wrote to memory of 2108	2712	seqrut.exe	107
PID 2712 wrote to memory of 2108	2712	seqrut.exe	107
PID 2712 wrote to memory of 2108	2712	seqrut.exe	107
PID 2712 wrote to memory of 2964	2712	seqrut.exe	108
PID 2712 wrote to memory of 2964	2712	seqrut.exe	108
PID 2712 wrote to memory of 2964	2712	seqrut.exe	108
PID 2712 wrote to memory of 4964	2712	seqrut.exe	109
PID 2712 wrote to memory of 4964	2712	seqrut.exe	109
PID 2712 wrote to memory of 4964	2712	seqrut.exe	109
PID 2712 wrote to memory of 2312	2712	seqrut.exe	110
PID 2712 wrote to memory of 2312	2712	seqrut.exe	110
PID 2712 wrote to memory of 2312	2712	seqrut.exe	110
PID 2712 wrote to memory of 1872	2712	seqrut.exe	111
PID 2712 wrote to memory of 1872	2712	seqrut.exe	111
PID 2712 wrote to memory of 1872	2712	seqrut.exe	111
PID 1872 wrote to memory of 3440	1872	seqrut.exe	113
PID 1872 wrote to memory of 3440	1872	seqrut.exe	113
PID 1872 wrote to memory of 3440	1872	seqrut.exe	113

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\a ton of ya\ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe
"C:\Users\Admin\AppData\Local\Temp\a ton of ya\ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2332
- 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:2320
- C:\Users\Admin\AppData\Local\Temp\seqrut.exe
  "C:\Users\Admin\AppData\Local\Temp\seqrut.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:2712
- - C:\Users\Admin\AppData\Local\Temp\seqrut.exe
    "C:\Users\Admin\AppData\Local\Temp\seqrut.exe" /watchdog
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:2976
- - C:\Users\Admin\AppData\Local\Temp\seqrut.exe
    "C:\Users\Admin\AppData\Local\Temp\seqrut.exe" /watchdog
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:2108
- - C:\Users\Admin\AppData\Local\Temp\seqrut.exe
    "C:\Users\Admin\AppData\Local\Temp\seqrut.exe" /watchdog
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:2964
- - C:\Users\Admin\AppData\Local\Temp\seqrut.exe
    "C:\Users\Admin\AppData\Local\Temp\seqrut.exe" /watchdog
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:4964
- - C:\Users\Admin\AppData\Local\Temp\seqrut.exe
    "C:\Users\Admin\AppData\Local\Temp\seqrut.exe" /watchdog
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:2312
- - C:\Users\Admin\AppData\Local\Temp\seqrut.exe
    "C:\Users\Admin\AppData\Local\Temp\seqrut.exe" /main
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Writes to the Master Boot Record (MBR)
    - Suspicious use of WriteProcessMemory
    PID:1872
  - - C:\Windows\SysWOW64\notepad.exe
      "C:\Windows\System32\notepad.exe" \note.txt
      4⤵
      PID:3440

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4048 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
1⤵
PID:1944

C:\Users\Admin\AppData\Local\uwumonster.exe
C:\Users\Admin\AppData\Local\uwumonster.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4024

C:\Users\Admin\AppData\Local\uwumonster.exe
C:\Users\Admin\AppData\Local\uwumonster.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4816

C:\Users\Admin\AppData\Local\uwumonster.exe
C:\Users\Admin\AppData\Local\uwumonster.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4356

C:\Users\Admin\AppData\Local\uwumonster.exe
C:\Users\Admin\AppData\Local\uwumonster.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3372

C:\Users\Admin\AppData\Local\uwumonster.exe
C:\Users\Admin\AppData\Local\uwumonster.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2076

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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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\Temp\seqrut.exe

Filesize
16KB

MD5
1d5ad9c8d3fee874d0feb8bfac220a11

SHA1
ca6d3f7e6c784155f664a9179ca64e4034df9595

SHA256
3872c12d31fc9825e8661ac01ecee2572460677afbc7093f920a8436a42e28ff

SHA512
c8246f4137416be33b6d1ac89f2428b7c44d9376ac8489a9fbf65ef128a6c53fb50479e1e400c8e201c8611992ab1d6c1bd3d6cece89013edb4d35cdd22305b1

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

Filesize
63KB

MD5
222c2d239f4c8a1d73c736c9cc712807

SHA1
c3aa61bd6f8cc640bcfa74c40d9283c9c08c7b3c

SHA256
ff43049677c57277f12a1d97f02af3029d7b75b5ad40303a28f1b0452997969d

SHA512
1f2fea85e45e93916306c234b916d6b4b200dac9656e44f4555f825dd8677cb5e927bd5e7a74bf2fb2f6972a3e6e2d294a6104add162ba3d53a0e6cfedef6a02

Download Submit
C:\note.txt

Filesize
218B

MD5
afa6955439b8d516721231029fb9ca1b

SHA1
087a043cc123c0c0df2ffadcf8e71e3ac86bbae9

SHA256
8e9f20f6864c66576536c0b866c6ffdcf11397db67fe120e972e244c3c022270

SHA512
5da21a31fbc4e8250dffed30f66b896bdf007ac91948140334fe36a3f010e1bac3e70a07e9f3eb9da8633189091fd5cadcabbaacd3e01da0fe7ae28a11b3dddf

Download Submit
memory/2332-0-0x00007FFA36593000-0x00007FFA36595000-memory.dmp

Filesize
8KB

Download
memory/2332-1-0x0000000000210000-0x0000000000226000-memory.dmp

Filesize
88KB

Download
memory/2332-6-0x00007FFA36590000-0x00007FFA37051000-memory.dmp

Filesize
10.8MB

Download
memory/2332-7-0x00007FFA36590000-0x00007FFA37051000-memory.dmp

Filesize
10.8MB

Download
memory/4024-10-0x00007FFA36590000-0x00007FFA37051000-memory.dmp

Filesize
10.8MB

Download
memory/4024-12-0x00007FFA36590000-0x00007FFA37051000-memory.dmp

Filesize
10.8MB

Download