umbral | 51589dfe63f2e3a133e88b9cc629de666d6506b1984d2225e121b37ba4f571e9

Analysis

max time kernel
150s
max time network
153s
platform
windows11-21h2_x64
resource
win11-20250217-en
resource tags

arch:x64arch:x86image:win11-20250217-enlocale:en-usos:windows11-21h2-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
behavioral5/files/0x001b00000002aef2-17.dat	family_umbral
behavioral5/memory/4716-26-0x000002DE4F820000-0x000002DE4F860000-memory.dmp	family_umbral

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral5/files/0x001d00000002aed1-6.dat	family_xworm
behavioral5/memory/3668-24-0x0000000000610000-0x000000000062A000-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
1380	powershell.exe
3232	powershell.exe
2320	powershell.exe
2188	powershell.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
3668	obxod 261dev.exe
4716	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-1-5-21-1298619118-249045975-4264763259-1000\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
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 9 IoCs

pid	Process
3232	powershell.exe
3232	powershell.exe
2320	powershell.exe
2320	powershell.exe
2188	powershell.exe
2188	powershell.exe
1380	powershell.exe
1380	powershell.exe
3668	obxod 261dev.exe

Suspicious use of AdjustPrivilegeToken 49 IoCs

description	pid	Process
Token: SeDebugPrivilege	3668	obxod 261dev.exe
Token: SeDebugPrivilege	4716	Umbral.exe
Token: SeIncreaseQuotaPrivilege	4704	wmic.exe
Token: SeSecurityPrivilege	4704	wmic.exe
Token: SeTakeOwnershipPrivilege	4704	wmic.exe
Token: SeLoadDriverPrivilege	4704	wmic.exe
Token: SeSystemProfilePrivilege	4704	wmic.exe
Token: SeSystemtimePrivilege	4704	wmic.exe
Token: SeProfSingleProcessPrivilege	4704	wmic.exe
Token: SeIncBasePriorityPrivilege	4704	wmic.exe
Token: SeCreatePagefilePrivilege	4704	wmic.exe
Token: SeBackupPrivilege	4704	wmic.exe
Token: SeRestorePrivilege	4704	wmic.exe
Token: SeShutdownPrivilege	4704	wmic.exe
Token: SeDebugPrivilege	4704	wmic.exe
Token: SeSystemEnvironmentPrivilege	4704	wmic.exe
Token: SeRemoteShutdownPrivilege	4704	wmic.exe
Token: SeUndockPrivilege	4704	wmic.exe
Token: SeManageVolumePrivilege	4704	wmic.exe
Token: 33	4704	wmic.exe
Token: 34	4704	wmic.exe
Token: 35	4704	wmic.exe
Token: 36	4704	wmic.exe
Token: SeIncreaseQuotaPrivilege	4704	wmic.exe
Token: SeSecurityPrivilege	4704	wmic.exe
Token: SeTakeOwnershipPrivilege	4704	wmic.exe
Token: SeLoadDriverPrivilege	4704	wmic.exe
Token: SeSystemProfilePrivilege	4704	wmic.exe
Token: SeSystemtimePrivilege	4704	wmic.exe
Token: SeProfSingleProcessPrivilege	4704	wmic.exe
Token: SeIncBasePriorityPrivilege	4704	wmic.exe
Token: SeCreatePagefilePrivilege	4704	wmic.exe
Token: SeBackupPrivilege	4704	wmic.exe
Token: SeRestorePrivilege	4704	wmic.exe
Token: SeShutdownPrivilege	4704	wmic.exe
Token: SeDebugPrivilege	4704	wmic.exe
Token: SeSystemEnvironmentPrivilege	4704	wmic.exe
Token: SeRemoteShutdownPrivilege	4704	wmic.exe
Token: SeUndockPrivilege	4704	wmic.exe
Token: SeManageVolumePrivilege	4704	wmic.exe
Token: 33	4704	wmic.exe
Token: 34	4704	wmic.exe
Token: 35	4704	wmic.exe
Token: 36	4704	wmic.exe
Token: SeDebugPrivilege	3232	powershell.exe
Token: SeDebugPrivilege	2320	powershell.exe
Token: SeDebugPrivilege	2188	powershell.exe
Token: SeDebugPrivilege	1380	powershell.exe
Token: SeDebugPrivilege	3668	obxod 261dev.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3668	obxod 261dev.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1108 wrote to memory of 3668	1108	obxod261dev.exe	81
PID 1108 wrote to memory of 3668	1108	obxod261dev.exe	81
PID 1108 wrote to memory of 4716	1108	obxod261dev.exe	82
PID 1108 wrote to memory of 4716	1108	obxod261dev.exe	82
PID 4716 wrote to memory of 4704	4716	Umbral.exe	83
PID 4716 wrote to memory of 4704	4716	Umbral.exe	83
PID 3668 wrote to memory of 3232	3668	obxod 261dev.exe	87
PID 3668 wrote to memory of 3232	3668	obxod 261dev.exe	87
PID 3668 wrote to memory of 2320	3668	obxod 261dev.exe	89
PID 3668 wrote to memory of 2320	3668	obxod 261dev.exe	89
PID 3668 wrote to memory of 2188	3668	obxod 261dev.exe	91
PID 3668 wrote to memory of 2188	3668	obxod 261dev.exe	91
PID 3668 wrote to memory of 1380	3668	obxod 261dev.exe	93
PID 3668 wrote to memory of 1380	3668	obxod 261dev.exe	93

C:\Users\Admin\AppData\Local\Temp\obxod261dev.exe
"C:\Users\Admin\AppData\Local\Temp\obxod261dev.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1108
- C:\Users\Admin\AppData\Roaming\obxod 261dev.exe
  "C:\Users\Admin\AppData\Roaming\obxod 261dev.exe"
  2⤵
  - 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:3668
- - 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:3232
- - 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
    - Suspicious use of AdjustPrivilegeToken
    PID:2320
- - 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
    - Suspicious use of AdjustPrivilegeToken
    PID:2188
- - 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
    - Suspicious use of AdjustPrivilegeToken
    PID:1380
- 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:4716
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4704

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

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\powershell.exe.log

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

Filesize
944B

MD5
4914eb0b2ff51bfa48484b5cc8454218

SHA1
6a7c3e36ce53b42497884d4c4a3bda438dd4374b

SHA256
7e510fc9344ef239ab1ab650dc95bb25fd44e2efba8b8246a3ac17880ee8b69e

SHA512
83ab35f622f4a5040ca5cb615a30f83bb0741449225f1fd1815b6923e225c28241d0c02d34f83f743349a5e57f84ca1c6f44016797a93d5985be41d11be79500

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

Filesize
944B

MD5
4397b0d1a82fec8a95f1ab53c152c5a5

SHA1
3632ed4f2b65fd0df29b3d3725e3a611d2e1adf7

SHA256
10cece13749ac090c815e53dc5e248b4b9c3ba93dc3d434d97d22f12a3906734

SHA512
f0d21ab75d08e1cb4ac83507f9ca41ef5365027b0d7e27747ded44b76fdb0346ca2d7499697802c5b67696e0c73716fcfab698825a143515151001690804d59f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2x1nwdwt.a0j.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/1108-1-0x0000000000270000-0x00000000002C8000-memory.dmp

Filesize
352KB

Download
memory/1108-0-0x00007FFE48DD3000-0x00007FFE48DD5000-memory.dmp

Filesize
8KB

Download
memory/3232-31-0x0000019D3B900000-0x0000019D3B922000-memory.dmp

Filesize
136KB

Download
memory/3668-24-0x0000000000610000-0x000000000062A000-memory.dmp

Filesize
104KB

Download
memory/3668-27-0x00007FFE48DD0000-0x00007FFE49892000-memory.dmp

Filesize
10.8MB

Download
memory/3668-77-0x00007FFE48DD0000-0x00007FFE49892000-memory.dmp

Filesize
10.8MB

Download
memory/3668-78-0x00007FFE48DD0000-0x00007FFE49892000-memory.dmp

Filesize
10.8MB

Download
memory/3668-79-0x00007FFE48DD0000-0x00007FFE49892000-memory.dmp

Filesize
10.8MB

Download
memory/4716-30-0x00007FFE48DD0000-0x00007FFE49892000-memory.dmp

Filesize
10.8MB

Download
memory/4716-28-0x00007FFE48DD0000-0x00007FFE49892000-memory.dmp

Filesize
10.8MB

Download
memory/4716-26-0x000002DE4F820000-0x000002DE4F860000-memory.dmp

Filesize
256KB

Download