umbral | b371f2297254813a544d9ca193c79602c99e46e68816f87455594ca08dffc7bb

Analysis

max time kernel
148s
max time network
143s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20250217-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20250217-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
23-02-2025 10:35

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

obxod236dev.exe
Size

324KB
MD5

d429f5d73a91de14778bae5fb0f79331
SHA1

368a76ec5dcb300ab2b962ea3130839bb4a7cd8f
SHA256

b371f2297254813a544d9ca193c79602c99e46e68816f87455594ca08dffc7bb
SHA512

6f058a43df86a6f17595073e91b925d444a36e226d04fb51bda8e186835c964faa5c6f687bd2718e155a22e130dd30700e8fd752e490c0770f6d671ca78d3c08
SSDEEP

6144:KHMf5ZdffTWP8nWCxW4z0xlLGIDAnOo0oStH+SN5H928xh9Ss2:1BZdf8sWCYpxQIjO2e6BH2

Score

10^/10

umbral xworm execution persistence rat stealer trojan

Malware Config

Extracted

Family

xworm

25.ip.gl.ply.gg:59054

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral4/files/0x000b000000027c9b-18.dat	family_umbral
behavioral4/memory/1628-31-0x00000187B7550000-0x00000187B7590000-memory.dmp	family_umbral

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral4/files/0x000d000000027c0d-6.dat	family_xworm
behavioral4/memory/4736-32-0x0000000000EB0000-0x0000000000ECA000-memory.dmp	family_xworm

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Umbral family
umbral
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3364	powershell.exe
3308	powershell.exe
1244	powershell.exe
3904	powershell.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2501448743-3279416841-701563739-1000\Control Panel\International\Geo\Nation	obxod236dev.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2501448743-3279416841-701563739-1000\Control Panel\International\Geo\Nation	obxod 236dev.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	obxod 236dev.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	obxod 236dev.exe

Executes dropped EXE 2 IoCs

pid	Process
4736	obxod 236dev.exe
1628	Umbral.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-1-5-21-2501448743-3279416841-701563739-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	obxod 236dev.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.

flow	ioc
3	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
1448	wmic.exe
1448	wmic.exe
1448	wmic.exe
1448	wmic.exe
3364	powershell.exe
3364	powershell.exe
3308	powershell.exe
3308	powershell.exe
1244	powershell.exe
1244	powershell.exe
3904	powershell.exe
3904	powershell.exe
4736	obxod 236dev.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4736	obxod 236dev.exe
Token: SeDebugPrivilege	1628	Umbral.exe
Token: SeIncreaseQuotaPrivilege	1448	wmic.exe
Token: SeSecurityPrivilege	1448	wmic.exe
Token: SeTakeOwnershipPrivilege	1448	wmic.exe
Token: SeLoadDriverPrivilege	1448	wmic.exe
Token: SeSystemProfilePrivilege	1448	wmic.exe
Token: SeSystemtimePrivilege	1448	wmic.exe
Token: SeProfSingleProcessPrivilege	1448	wmic.exe
Token: SeIncBasePriorityPrivilege	1448	wmic.exe
Token: SeCreatePagefilePrivilege	1448	wmic.exe
Token: SeBackupPrivilege	1448	wmic.exe
Token: SeRestorePrivilege	1448	wmic.exe
Token: SeShutdownPrivilege	1448	wmic.exe
Token: SeDebugPrivilege	1448	wmic.exe
Token: SeSystemEnvironmentPrivilege	1448	wmic.exe
Token: SeRemoteShutdownPrivilege	1448	wmic.exe
Token: SeUndockPrivilege	1448	wmic.exe
Token: SeManageVolumePrivilege	1448	wmic.exe
Token: 33	1448	wmic.exe
Token: 34	1448	wmic.exe
Token: 35	1448	wmic.exe
Token: 36	1448	wmic.exe
Token: SeIncreaseQuotaPrivilege	1448	wmic.exe
Token: SeSecurityPrivilege	1448	wmic.exe
Token: SeTakeOwnershipPrivilege	1448	wmic.exe
Token: SeLoadDriverPrivilege	1448	wmic.exe
Token: SeSystemProfilePrivilege	1448	wmic.exe
Token: SeSystemtimePrivilege	1448	wmic.exe
Token: SeProfSingleProcessPrivilege	1448	wmic.exe
Token: SeIncBasePriorityPrivilege	1448	wmic.exe
Token: SeCreatePagefilePrivilege	1448	wmic.exe
Token: SeBackupPrivilege	1448	wmic.exe
Token: SeRestorePrivilege	1448	wmic.exe
Token: SeShutdownPrivilege	1448	wmic.exe
Token: SeDebugPrivilege	1448	wmic.exe
Token: SeSystemEnvironmentPrivilege	1448	wmic.exe
Token: SeRemoteShutdownPrivilege	1448	wmic.exe
Token: SeUndockPrivilege	1448	wmic.exe
Token: SeManageVolumePrivilege	1448	wmic.exe
Token: 33	1448	wmic.exe
Token: 34	1448	wmic.exe
Token: 35	1448	wmic.exe
Token: 36	1448	wmic.exe
Token: SeDebugPrivilege	3364	powershell.exe
Token: SeIncreaseQuotaPrivilege	3364	powershell.exe
Token: SeSecurityPrivilege	3364	powershell.exe
Token: SeTakeOwnershipPrivilege	3364	powershell.exe
Token: SeLoadDriverPrivilege	3364	powershell.exe
Token: SeSystemProfilePrivilege	3364	powershell.exe
Token: SeSystemtimePrivilege	3364	powershell.exe
Token: SeProfSingleProcessPrivilege	3364	powershell.exe
Token: SeIncBasePriorityPrivilege	3364	powershell.exe
Token: SeCreatePagefilePrivilege	3364	powershell.exe
Token: SeBackupPrivilege	3364	powershell.exe
Token: SeRestorePrivilege	3364	powershell.exe
Token: SeShutdownPrivilege	3364	powershell.exe
Token: SeDebugPrivilege	3364	powershell.exe
Token: SeSystemEnvironmentPrivilege	3364	powershell.exe
Token: SeRemoteShutdownPrivilege	3364	powershell.exe
Token: SeUndockPrivilege	3364	powershell.exe
Token: SeManageVolumePrivilege	3364	powershell.exe
Token: 33	3364	powershell.exe
Token: 34	3364	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4736	obxod 236dev.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 4736	1672	obxod236dev.exe	83
PID 1672 wrote to memory of 4736	1672	obxod236dev.exe	83
PID 1672 wrote to memory of 1628	1672	obxod236dev.exe	84
PID 1672 wrote to memory of 1628	1672	obxod236dev.exe	84
PID 1628 wrote to memory of 1448	1628	Umbral.exe	85
PID 1628 wrote to memory of 1448	1628	Umbral.exe	85
PID 4736 wrote to memory of 3364	4736	obxod 236dev.exe	88
PID 4736 wrote to memory of 3364	4736	obxod 236dev.exe	88
PID 4736 wrote to memory of 3308	4736	obxod 236dev.exe	91
PID 4736 wrote to memory of 3308	4736	obxod 236dev.exe	91
PID 4736 wrote to memory of 1244	4736	obxod 236dev.exe	93
PID 4736 wrote to memory of 1244	4736	obxod 236dev.exe	93
PID 4736 wrote to memory of 3904	4736	obxod 236dev.exe	95
PID 4736 wrote to memory of 3904	4736	obxod 236dev.exe	95

C:\Users\Admin\AppData\Local\Temp\obxod236dev.exe
"C:\Users\Admin\AppData\Local\Temp\obxod236dev.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1672
- C:\Users\Admin\AppData\Roaming\obxod 236dev.exe
  "C:\Users\Admin\AppData\Roaming\obxod 236dev.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4736
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\obxod 236dev.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3364
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'obxod 236dev.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:3308
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:1244
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:3904
- C:\Users\Admin\AppData\Roaming\Umbral.exe
  "C:\Users\Admin\AppData\Roaming\Umbral.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1628
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
f0f59cccd39a3694e0e6dfd44d0fa76d

SHA1
fccd7911d463041e1168431df8823e4c4ea387c1

SHA256
70466c7f3a911368d653396fdd68f993322c69e1797b492ca00f8be34b7f3401

SHA512
5c726e1e28cb9c0c3ab963fbfbf471c6033839f3e535a3811581fdaa4da17175e5a8a8be84a4fccd99b81e048058e51d230ff3836e3ec920057a1b1676110bee

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
dd472b10104548f82e649da6995dea21

SHA1
8303e5a6f2ccc82ce54e31a52052842aa4e80cdf

SHA256
c10195fa01e4625b66d779a605a4812e7985d17363c5064459c182941a9c741f

SHA512
c4f5fe5003b1e881b02e4658be09d8c7273240947d83e17f6c83d3c04b3a52d089957311b0c1fcaee443a959fdac22e88a60398b2f13b4bbd7fb2d8195cf1cf6

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
c238412481a146ab11982ee82490777c

SHA1
61451087cbd22daf63c18b6c3c939fe0952f27c3

SHA256
25f1c3a4b36ae44eb159193c17cc953ae3fa576928f2384865ab837a964bd9f2

SHA512
4ee702b05336364af8cb89a6dd162b9404a8307c5fef96b7af82e8db55459b65b0ce1ce6f6e3018aa213a73f42ba5dc80d8550e45baf756ef0b8b8459e7f9f9b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1johjhwe.i3o.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Umbral.exe

Filesize
232KB

MD5
e486d8aafa368a43a56987dd4d80aa75

SHA1
8851fe89928a47a58b50348d9a4458f24e2725f9

SHA256
596ac7d2aa525ceb7b82aec1e6376d34f36649f028de442fb0a0021e380db136

SHA512
abe413e1277c0ac103778822dcd3f6b03f315fad83731af10284a68fca8ecfa2d2c6b9d9c3e0ec55803a2b31d03ae9c863c430eba23954ccc5f82b2a6d21e573

Download Submit
C:\Users\Admin\AppData\Roaming\obxod 236dev.exe

Filesize
80KB

MD5
3598f860aacfe53b00c305715a6c7b2f

SHA1
70640b2e8a71017cdf5fb8e91fe0b065f89a064b

SHA256
b4b8385381c3bb23d821f179a73ff19083d15f7cc6e1c9cc2235da3c382db241

SHA512
0b2bfa9e701ba126acb6bf9b9b5df26e8558a59708659ec2981173267d277f44e6b6575f1ceb945a86705796ea8f50c5cd1617ee45fdaabdc68af9b2022e654c

Download Submit
memory/1628-31-0x00000187B7550000-0x00000187B7590000-memory.dmp

Filesize
256KB

Download
memory/1628-36-0x00007FFE52170000-0x00007FFE52C32000-memory.dmp

Filesize
10.8MB

Download
memory/1628-34-0x00007FFE52170000-0x00007FFE52C32000-memory.dmp

Filesize
10.8MB

Download
memory/1672-0-0x00007FFE52173000-0x00007FFE52175000-memory.dmp

Filesize
8KB

Download
memory/1672-1-0x00000000003E0000-0x0000000000438000-memory.dmp

Filesize
352KB

Download
memory/3364-42-0x000001B6984E0000-0x000001B698502000-memory.dmp

Filesize
136KB

Download
memory/4736-33-0x00007FFE52170000-0x00007FFE52C32000-memory.dmp

Filesize
10.8MB

Download
memory/4736-32-0x0000000000EB0000-0x0000000000ECA000-memory.dmp

Filesize
104KB

Download
memory/4736-87-0x00007FFE52170000-0x00007FFE52C32000-memory.dmp

Filesize
10.8MB

Download
memory/4736-88-0x00007FFE52170000-0x00007FFE52C32000-memory.dmp

Filesize
10.8MB

Download