umbral | 51589dfe63f2e3a133e88b9cc629de666d6506b1984d2225e121b37ba4f571e9

Analysis

max time kernel
148s
max time network
152s
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

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General

Target

obxod261dev.exe
Size

325KB
MD5

1ff532cb4ba83c965488e9663660b1ec
SHA1

711b1d488423ebfe74423bde53f1ca84ae7d427d
SHA256

51589dfe63f2e3a133e88b9cc629de666d6506b1984d2225e121b37ba4f571e9
SHA512

80ca58440c889d82fdc7aafa301c31337b6559e5cea47ea9b10db1b7db46592ccf55323b14b2557190975b43a4ff60c7afcf20f08aa0c78e1b9bec8e821db2a0
SSDEEP

6144:wEX/3fohzEKxY6KO/6YzJldhZWim8TYaW8FP5RewSPT9hyvmT:TgEKxYs3zDdhZW/8Tq8FPzewSKv

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/0x000b000000027dc7-20.dat	family_umbral
behavioral4/memory/4616-31-0x000001A86FF20000-0x000001A86FF60000-memory.dmp	family_umbral

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral4/files/0x000b000000027dc4-6.dat	family_xworm
behavioral4/memory/1028-32-0x0000000000300000-0x000000000031A000-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
1472	powershell.exe
3508	powershell.exe
2044	powershell.exe
3860	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-1-5-21-1639757381-2759246526-4253643256-1000\Control Panel\International\Geo\Nation	obxod261dev.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1639757381-2759246526-4253643256-1000\Control Panel\International\Geo\Nation	obxod 261dev.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 261dev.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	obxod 261dev.exe

Executes dropped EXE 2 IoCs

pid	Process
1028	obxod 261dev.exe
4616	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-1-5-21-1639757381-2759246526-4253643256-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	obxod 261dev.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
4	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
4204	wmic.exe
4204	wmic.exe
4204	wmic.exe
4204	wmic.exe
1472	powershell.exe
1472	powershell.exe
3508	powershell.exe
3508	powershell.exe
2044	powershell.exe
2044	powershell.exe
3860	powershell.exe
3860	powershell.exe
1028	obxod 261dev.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1028	obxod 261dev.exe
Token: SeDebugPrivilege	4616	Umbral.exe
Token: SeIncreaseQuotaPrivilege	4204	wmic.exe
Token: SeSecurityPrivilege	4204	wmic.exe
Token: SeTakeOwnershipPrivilege	4204	wmic.exe
Token: SeLoadDriverPrivilege	4204	wmic.exe
Token: SeSystemProfilePrivilege	4204	wmic.exe
Token: SeSystemtimePrivilege	4204	wmic.exe
Token: SeProfSingleProcessPrivilege	4204	wmic.exe
Token: SeIncBasePriorityPrivilege	4204	wmic.exe
Token: SeCreatePagefilePrivilege	4204	wmic.exe
Token: SeBackupPrivilege	4204	wmic.exe
Token: SeRestorePrivilege	4204	wmic.exe
Token: SeShutdownPrivilege	4204	wmic.exe
Token: SeDebugPrivilege	4204	wmic.exe
Token: SeSystemEnvironmentPrivilege	4204	wmic.exe
Token: SeRemoteShutdownPrivilege	4204	wmic.exe
Token: SeUndockPrivilege	4204	wmic.exe
Token: SeManageVolumePrivilege	4204	wmic.exe
Token: 33	4204	wmic.exe
Token: 34	4204	wmic.exe
Token: 35	4204	wmic.exe
Token: 36	4204	wmic.exe
Token: SeIncreaseQuotaPrivilege	4204	wmic.exe
Token: SeSecurityPrivilege	4204	wmic.exe
Token: SeTakeOwnershipPrivilege	4204	wmic.exe
Token: SeLoadDriverPrivilege	4204	wmic.exe
Token: SeSystemProfilePrivilege	4204	wmic.exe
Token: SeSystemtimePrivilege	4204	wmic.exe
Token: SeProfSingleProcessPrivilege	4204	wmic.exe
Token: SeIncBasePriorityPrivilege	4204	wmic.exe
Token: SeCreatePagefilePrivilege	4204	wmic.exe
Token: SeBackupPrivilege	4204	wmic.exe
Token: SeRestorePrivilege	4204	wmic.exe
Token: SeShutdownPrivilege	4204	wmic.exe
Token: SeDebugPrivilege	4204	wmic.exe
Token: SeSystemEnvironmentPrivilege	4204	wmic.exe
Token: SeRemoteShutdownPrivilege	4204	wmic.exe
Token: SeUndockPrivilege	4204	wmic.exe
Token: SeManageVolumePrivilege	4204	wmic.exe
Token: 33	4204	wmic.exe
Token: 34	4204	wmic.exe
Token: 35	4204	wmic.exe
Token: 36	4204	wmic.exe
Token: SeDebugPrivilege	1472	powershell.exe
Token: SeIncreaseQuotaPrivilege	1472	powershell.exe
Token: SeSecurityPrivilege	1472	powershell.exe
Token: SeTakeOwnershipPrivilege	1472	powershell.exe
Token: SeLoadDriverPrivilege	1472	powershell.exe
Token: SeSystemProfilePrivilege	1472	powershell.exe
Token: SeSystemtimePrivilege	1472	powershell.exe
Token: SeProfSingleProcessPrivilege	1472	powershell.exe
Token: SeIncBasePriorityPrivilege	1472	powershell.exe
Token: SeCreatePagefilePrivilege	1472	powershell.exe
Token: SeBackupPrivilege	1472	powershell.exe
Token: SeRestorePrivilege	1472	powershell.exe
Token: SeShutdownPrivilege	1472	powershell.exe
Token: SeDebugPrivilege	1472	powershell.exe
Token: SeSystemEnvironmentPrivilege	1472	powershell.exe
Token: SeRemoteShutdownPrivilege	1472	powershell.exe
Token: SeUndockPrivilege	1472	powershell.exe
Token: SeManageVolumePrivilege	1472	powershell.exe
Token: 33	1472	powershell.exe
Token: 34	1472	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1028	obxod 261dev.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1220 wrote to memory of 1028	1220	obxod261dev.exe	83
PID 1220 wrote to memory of 1028	1220	obxod261dev.exe	83
PID 1220 wrote to memory of 4616	1220	obxod261dev.exe	84
PID 1220 wrote to memory of 4616	1220	obxod261dev.exe	84
PID 4616 wrote to memory of 4204	4616	Umbral.exe	85
PID 4616 wrote to memory of 4204	4616	Umbral.exe	85
PID 1028 wrote to memory of 1472	1028	obxod 261dev.exe	88
PID 1028 wrote to memory of 1472	1028	obxod 261dev.exe	88
PID 1028 wrote to memory of 3508	1028	obxod 261dev.exe	91
PID 1028 wrote to memory of 3508	1028	obxod 261dev.exe	91
PID 1028 wrote to memory of 2044	1028	obxod 261dev.exe	93
PID 1028 wrote to memory of 2044	1028	obxod 261dev.exe	93
PID 1028 wrote to memory of 3860	1028	obxod 261dev.exe	95
PID 1028 wrote to memory of 3860	1028	obxod 261dev.exe	95

C:\Users\Admin\AppData\Local\Temp\obxod261dev.exe
"C:\Users\Admin\AppData\Local\Temp\obxod261dev.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1220
- C:\Users\Admin\AppData\Roaming\obxod 261dev.exe
  "C:\Users\Admin\AppData\Roaming\obxod 261dev.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:1028
- - 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 261dev.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1472
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'obxod 261dev.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:3508
- - 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:2044
- - 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:3860
- 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:4616
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4204

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

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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
60b3262c3163ee3d466199160b9ed07d

SHA1
994ece4ea4e61de0be2fdd580f87e3415f9e1ff6

SHA256
e3b30f16d41f94cba2b8a75f35c91ae7418465abfbfe5477ec0551d1952b2fdb

SHA512
081d2015cb94477eb0fbc38f44b6d9b4a3204fb3ad0b7d0e146a88ab4ab9a0d475207f1adae03f4a81ccc5beb7568dc8be1249f69e32fe56efd9ee2f6ee3b1af

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

Filesize
1KB

MD5
f50c6211962fbb20e65ecd3109773e88

SHA1
39196c36686293279bb8650afad77f01957b83a5

SHA256
db067293932f5c67a6dba22f6e0bb007196fc60bb9042b6be4fedbe1ef103348

SHA512
7534c9ba3d7b89a6d41a7f7f1e1507c9236c1b79663828fff7fbc03ed3da9cc1edd74d41d42ef3e67b813afc99490736efafca8d4169baaeea6cdcee5e4d89b0

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

Filesize
1KB

MD5
841f16c5b3313d1b894cfac78f413981

SHA1
0dcc4f0bbd91f2159305963df27ff3e51227e801

SHA256
1d09d2b4517438228149bc6a0c289972c29cb5b0321db55cedbfa870896bda1d

SHA512
76a4fbabdafbbc014f709ffd2ad5d1579657f46fc4a053ea854362176319cbbfe3d7a6a3b2c8c9d2cdb738055d2201e47f5ca2ef5f0b5f1ed484465b9986d452

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_nmi5hpoe.bin.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 261dev.exe

Filesize
80KB

MD5
3598f860aacfe53b00c305715a6c7b2f

SHA1
70640b2e8a71017cdf5fb8e91fe0b065f89a064b

SHA256
b4b8385381c3bb23d821f179a73ff19083d15f7cc6e1c9cc2235da3c382db241

SHA512
0b2bfa9e701ba126acb6bf9b9b5df26e8558a59708659ec2981173267d277f44e6b6575f1ceb945a86705796ea8f50c5cd1617ee45fdaabdc68af9b2022e654c

Download Submit
memory/1028-33-0x00007FFBB67B0000-0x00007FFBB7272000-memory.dmp

Filesize
10.8MB

Download
memory/1028-88-0x00007FFBB67B0000-0x00007FFBB7272000-memory.dmp

Filesize
10.8MB

Download
memory/1028-89-0x00007FFBB67B0000-0x00007FFBB7272000-memory.dmp

Filesize
10.8MB

Download
memory/1028-87-0x00007FFBB67B0000-0x00007FFBB7272000-memory.dmp

Filesize
10.8MB

Download
memory/1028-32-0x0000000000300000-0x000000000031A000-memory.dmp

Filesize
104KB

Download
memory/1220-0-0x00007FFBB67B3000-0x00007FFBB67B5000-memory.dmp

Filesize
8KB

Download
memory/1220-1-0x0000000000670000-0x00000000006C8000-memory.dmp

Filesize
352KB

Download
memory/1472-37-0x00000208B5D30000-0x00000208B5D52000-memory.dmp

Filesize
136KB

Download
memory/4616-31-0x000001A86FF20000-0x000001A86FF60000-memory.dmp

Filesize
256KB

Download
memory/4616-36-0x00007FFBB67B0000-0x00007FFBB7272000-memory.dmp

Filesize
10.8MB

Download
memory/4616-34-0x00007FFBB67B0000-0x00007FFBB7272000-memory.dmp

Filesize
10.8MB

Download