xworm | e1ea405efb08d4a7d254423fc5b700021eb653b1545d120c0f6cf4ff31c7f0ae

Resubmissions

02/05/2024, 02:59

240502-dg26eshb97 10

02/05/2024, 02:36

240502-c3k9csef7t 10

Analysis

max time kernel
297s
max time network
303s
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
behavioral10/memory/4300-1-0x0000000000620000-0x0000000000636000-memory.dmp	family_xworm
behavioral10/files/0x0008000000023249-9.dat	family_xworm

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

Checks computer location settings 2 TTPs 4 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	knrshe.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	knrshe.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	ozwgcb.exe

Drops startup file 2 IoCs

description	ioc	Process
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
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

Executes dropped EXE 17 IoCs

pid	Process
4872	uwumonster.exe
4424	uwumonster.exe
4628	uwumonster.exe
688	uwumonster.exe
1692	knrshe.exe
572	knrshe.exe
1352	knrshe.exe
2472	knrshe.exe
4112	knrshe.exe
3844	knrshe.exe
5112	knrshe.exe
1216	uwumonster.exe
4036	ozwgcb.exe
4132	ozwgcb.exe
4024	ozwgcb.exe
224	ozwgcb.exe
1404	ozwgcb.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	knrshe.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
3664	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
572	knrshe.exe
572	knrshe.exe
572	knrshe.exe
572	knrshe.exe
1352	knrshe.exe
1352	knrshe.exe
572	knrshe.exe
572	knrshe.exe
572	knrshe.exe
572	knrshe.exe
1352	knrshe.exe
1352	knrshe.exe
2472	knrshe.exe
2472	knrshe.exe
1352	knrshe.exe
1352	knrshe.exe
572	knrshe.exe
572	knrshe.exe
2472	knrshe.exe
2472	knrshe.exe
572	knrshe.exe
572	knrshe.exe
1352	knrshe.exe
1352	knrshe.exe
4112	knrshe.exe
4112	knrshe.exe
2472	knrshe.exe
2472	knrshe.exe
1352	knrshe.exe
1352	knrshe.exe
572	knrshe.exe
572	knrshe.exe
4112	knrshe.exe
2472	knrshe.exe
2472	knrshe.exe
4112	knrshe.exe
1352	knrshe.exe
3844	knrshe.exe
1352	knrshe.exe
3844	knrshe.exe
572	knrshe.exe
572	knrshe.exe
4112	knrshe.exe
2472	knrshe.exe
4112	knrshe.exe
2472	knrshe.exe
572	knrshe.exe
572	knrshe.exe
2472	knrshe.exe
2472	knrshe.exe
4112	knrshe.exe
4112	knrshe.exe
3844	knrshe.exe
3844	knrshe.exe
1352	knrshe.exe
1352	knrshe.exe
572	knrshe.exe
572	knrshe.exe
2472	knrshe.exe
2472	knrshe.exe
3844	knrshe.exe
1352	knrshe.exe
3844	knrshe.exe
1352	knrshe.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	4300	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe
Token: SeDebugPrivilege	4300	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe
Token: SeDebugPrivilege	4872	uwumonster.exe
Token: SeDebugPrivilege	4424	uwumonster.exe
Token: SeDebugPrivilege	4628	uwumonster.exe
Token: SeDebugPrivilege	688	uwumonster.exe
Token: SeDebugPrivilege	1216	uwumonster.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 4300 wrote to memory of 3664	4300	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe	90
PID 4300 wrote to memory of 3664	4300	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe	90
PID 4300 wrote to memory of 1692	4300	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe	105
PID 4300 wrote to memory of 1692	4300	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe	105
PID 4300 wrote to memory of 1692	4300	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe	105
PID 1692 wrote to memory of 572	1692	knrshe.exe	106
PID 1692 wrote to memory of 572	1692	knrshe.exe	106
PID 1692 wrote to memory of 572	1692	knrshe.exe	106
PID 1692 wrote to memory of 1352	1692	knrshe.exe	107
PID 1692 wrote to memory of 1352	1692	knrshe.exe	107
PID 1692 wrote to memory of 1352	1692	knrshe.exe	107
PID 1692 wrote to memory of 2472	1692	knrshe.exe	108
PID 1692 wrote to memory of 2472	1692	knrshe.exe	108
PID 1692 wrote to memory of 2472	1692	knrshe.exe	108
PID 1692 wrote to memory of 4112	1692	knrshe.exe	109
PID 1692 wrote to memory of 4112	1692	knrshe.exe	109
PID 1692 wrote to memory of 4112	1692	knrshe.exe	109
PID 1692 wrote to memory of 3844	1692	knrshe.exe	110
PID 1692 wrote to memory of 3844	1692	knrshe.exe	110
PID 1692 wrote to memory of 3844	1692	knrshe.exe	110
PID 1692 wrote to memory of 5112	1692	knrshe.exe	111
PID 1692 wrote to memory of 5112	1692	knrshe.exe	111
PID 1692 wrote to memory of 5112	1692	knrshe.exe	111
PID 5112 wrote to memory of 4956	5112	knrshe.exe	113
PID 5112 wrote to memory of 4956	5112	knrshe.exe	113
PID 5112 wrote to memory of 4956	5112	knrshe.exe	113
PID 4300 wrote to memory of 4036	4300	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe	115
PID 4300 wrote to memory of 4036	4300	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe	115
PID 4300 wrote to memory of 4036	4300	ya - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy - Copy -.exe	115
PID 4036 wrote to memory of 4132	4036	ozwgcb.exe	116
PID 4036 wrote to memory of 4132	4036	ozwgcb.exe	116
PID 4036 wrote to memory of 4132	4036	ozwgcb.exe	116
PID 4036 wrote to memory of 4024	4036	ozwgcb.exe	117
PID 4036 wrote to memory of 4024	4036	ozwgcb.exe	117
PID 4036 wrote to memory of 4024	4036	ozwgcb.exe	117
PID 4036 wrote to memory of 224	4036	ozwgcb.exe	118
PID 4036 wrote to memory of 224	4036	ozwgcb.exe	118
PID 4036 wrote to memory of 224	4036	ozwgcb.exe	118
PID 4036 wrote to memory of 1404	4036	ozwgcb.exe	119
PID 4036 wrote to memory of 1404	4036	ozwgcb.exe	119
PID 4036 wrote to memory of 1404	4036	ozwgcb.exe	119

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:4300
- 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:3664
- C:\Users\Admin\AppData\Local\Temp\knrshe.exe
  "C:\Users\Admin\AppData\Local\Temp\knrshe.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:1692
- - C:\Users\Admin\AppData\Local\Temp\knrshe.exe
    "C:\Users\Admin\AppData\Local\Temp\knrshe.exe" /watchdog
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:572
- - C:\Users\Admin\AppData\Local\Temp\knrshe.exe
    "C:\Users\Admin\AppData\Local\Temp\knrshe.exe" /watchdog
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:1352
- - C:\Users\Admin\AppData\Local\Temp\knrshe.exe
    "C:\Users\Admin\AppData\Local\Temp\knrshe.exe" /watchdog
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:2472
- - C:\Users\Admin\AppData\Local\Temp\knrshe.exe
    "C:\Users\Admin\AppData\Local\Temp\knrshe.exe" /watchdog
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:4112
- - C:\Users\Admin\AppData\Local\Temp\knrshe.exe
    "C:\Users\Admin\AppData\Local\Temp\knrshe.exe" /watchdog
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:3844
- - C:\Users\Admin\AppData\Local\Temp\knrshe.exe
    "C:\Users\Admin\AppData\Local\Temp\knrshe.exe" /main
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Writes to the Master Boot Record (MBR)
    - Suspicious use of WriteProcessMemory
    PID:5112
  - - C:\Windows\SysWOW64\notepad.exe
      "C:\Windows\System32\notepad.exe" \note.txt
      4⤵
      PID:4956
- C:\Users\Admin\AppData\Local\Temp\ozwgcb.exe
  "C:\Users\Admin\AppData\Local\Temp\ozwgcb.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:4036
- - C:\Users\Admin\AppData\Local\Temp\ozwgcb.exe
    "C:\Users\Admin\AppData\Local\Temp\ozwgcb.exe" /watchdog
    3⤵
    - Executes dropped EXE
    PID:4132
- - C:\Users\Admin\AppData\Local\Temp\ozwgcb.exe
    "C:\Users\Admin\AppData\Local\Temp\ozwgcb.exe" /watchdog
    3⤵
    - Executes dropped EXE
    PID:4024
- - C:\Users\Admin\AppData\Local\Temp\ozwgcb.exe
    "C:\Users\Admin\AppData\Local\Temp\ozwgcb.exe" /watchdog
    3⤵
    - Executes dropped EXE
    PID:224
- - C:\Users\Admin\AppData\Local\Temp\ozwgcb.exe
    "C:\Users\Admin\AppData\Local\Temp\ozwgcb.exe" /watchdog
    3⤵
    - Executes dropped EXE
    PID:1404
- - C:\Users\Admin\AppData\Local\Temp\ozwgcb.exe
    "C:\Users\Admin\AppData\Local\Temp\ozwgcb.exe" /watchdog
    3⤵
    PID:2992
- - C:\Users\Admin\AppData\Local\Temp\ozwgcb.exe
    "C:\Users\Admin\AppData\Local\Temp\ozwgcb.exe" /main
    3⤵
    PID:1684
  - - C:\Windows\SysWOW64\notepad.exe
      "C:\Windows\System32\notepad.exe" \note.txt
      4⤵
      PID:2964

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

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=3900 --field-trial-handle=2244,i,11878111470816612087,2265290141962607370,262144 --variations-seed-version /prefetch:8
1⤵
PID:4536

C:\Users\Admin\AppData\Local\uwumonster.exe
C:\Users\Admin\AppData\Local\uwumonster.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4424

C:\Users\Admin\AppData\Local\uwumonster.exe
C:\Users\Admin\AppData\Local\uwumonster.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4628

C:\Users\Admin\AppData\Local\uwumonster.exe
C:\Users\Admin\AppData\Local\uwumonster.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:688

C:\Users\Admin\AppData\Local\uwumonster.exe
C:\Users\Admin\AppData\Local\uwumonster.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1216

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

Replay Monitor

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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\knrshe.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/4300-0-0x00007FFC22ED3000-0x00007FFC22ED5000-memory.dmp

Filesize
8KB

Download
memory/4300-1-0x0000000000620000-0x0000000000636000-memory.dmp

Filesize
88KB

Download
memory/4300-6-0x00007FFC22ED0000-0x00007FFC23991000-memory.dmp

Filesize
10.8MB

Download
memory/4300-7-0x00007FFC22ED3000-0x00007FFC22ED5000-memory.dmp

Filesize
8KB

Download
memory/4300-8-0x00007FFC22ED0000-0x00007FFC23991000-memory.dmp

Filesize
10.8MB

Download
memory/4872-11-0x00007FFC22ED0000-0x00007FFC23991000-memory.dmp

Filesize
10.8MB

Download
memory/4872-13-0x00007FFC22ED0000-0x00007FFC23991000-memory.dmp

Filesize
10.8MB

Download