umbral | b371f2297254813a544d9ca193c79602c99e46e68816f87455594ca08dffc7bb

Analysis

max time kernel
147s
max time network
149s
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

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
behavioral5/files/0x001c00000002ae4e-16.dat	family_umbral
behavioral5/memory/5004-25-0x00000198E4490000-0x00000198E44D0000-memory.dmp	family_umbral

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral5/files/0x001c00000002adbb-6.dat	family_xworm
behavioral5/memory/1080-26-0x0000000000EA0000-0x0000000000EBA000-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
4088	powershell.exe
3904	powershell.exe
1592	powershell.exe
2432	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 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
1080	obxod 236dev.exe
5004	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-1-5-21-1408376509-1621642251-2666462513-1000\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
1	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
4088	powershell.exe
4088	powershell.exe
3904	powershell.exe
3904	powershell.exe
1592	powershell.exe
1592	powershell.exe
2432	powershell.exe
2432	powershell.exe
1080	obxod 236dev.exe

Suspicious use of AdjustPrivilegeToken 49 IoCs

description	pid	Process
Token: SeDebugPrivilege	1080	obxod 236dev.exe
Token: SeDebugPrivilege	5004	Umbral.exe
Token: SeIncreaseQuotaPrivilege	4028	wmic.exe
Token: SeSecurityPrivilege	4028	wmic.exe
Token: SeTakeOwnershipPrivilege	4028	wmic.exe
Token: SeLoadDriverPrivilege	4028	wmic.exe
Token: SeSystemProfilePrivilege	4028	wmic.exe
Token: SeSystemtimePrivilege	4028	wmic.exe
Token: SeProfSingleProcessPrivilege	4028	wmic.exe
Token: SeIncBasePriorityPrivilege	4028	wmic.exe
Token: SeCreatePagefilePrivilege	4028	wmic.exe
Token: SeBackupPrivilege	4028	wmic.exe
Token: SeRestorePrivilege	4028	wmic.exe
Token: SeShutdownPrivilege	4028	wmic.exe
Token: SeDebugPrivilege	4028	wmic.exe
Token: SeSystemEnvironmentPrivilege	4028	wmic.exe
Token: SeRemoteShutdownPrivilege	4028	wmic.exe
Token: SeUndockPrivilege	4028	wmic.exe
Token: SeManageVolumePrivilege	4028	wmic.exe
Token: 33	4028	wmic.exe
Token: 34	4028	wmic.exe
Token: 35	4028	wmic.exe
Token: 36	4028	wmic.exe
Token: SeIncreaseQuotaPrivilege	4028	wmic.exe
Token: SeSecurityPrivilege	4028	wmic.exe
Token: SeTakeOwnershipPrivilege	4028	wmic.exe
Token: SeLoadDriverPrivilege	4028	wmic.exe
Token: SeSystemProfilePrivilege	4028	wmic.exe
Token: SeSystemtimePrivilege	4028	wmic.exe
Token: SeProfSingleProcessPrivilege	4028	wmic.exe
Token: SeIncBasePriorityPrivilege	4028	wmic.exe
Token: SeCreatePagefilePrivilege	4028	wmic.exe
Token: SeBackupPrivilege	4028	wmic.exe
Token: SeRestorePrivilege	4028	wmic.exe
Token: SeShutdownPrivilege	4028	wmic.exe
Token: SeDebugPrivilege	4028	wmic.exe
Token: SeSystemEnvironmentPrivilege	4028	wmic.exe
Token: SeRemoteShutdownPrivilege	4028	wmic.exe
Token: SeUndockPrivilege	4028	wmic.exe
Token: SeManageVolumePrivilege	4028	wmic.exe
Token: 33	4028	wmic.exe
Token: 34	4028	wmic.exe
Token: 35	4028	wmic.exe
Token: 36	4028	wmic.exe
Token: SeDebugPrivilege	4088	powershell.exe
Token: SeDebugPrivilege	3904	powershell.exe
Token: SeDebugPrivilege	1592	powershell.exe
Token: SeDebugPrivilege	2432	powershell.exe
Token: SeDebugPrivilege	1080	obxod 236dev.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1080	obxod 236dev.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2800 wrote to memory of 1080	2800	obxod236dev.exe	78
PID 2800 wrote to memory of 1080	2800	obxod236dev.exe	78
PID 2800 wrote to memory of 5004	2800	obxod236dev.exe	79
PID 2800 wrote to memory of 5004	2800	obxod236dev.exe	79
PID 5004 wrote to memory of 4028	5004	Umbral.exe	80
PID 5004 wrote to memory of 4028	5004	Umbral.exe	80
PID 1080 wrote to memory of 4088	1080	obxod 236dev.exe	83
PID 1080 wrote to memory of 4088	1080	obxod 236dev.exe	83
PID 1080 wrote to memory of 3904	1080	obxod 236dev.exe	85
PID 1080 wrote to memory of 3904	1080	obxod 236dev.exe	85
PID 1080 wrote to memory of 1592	1080	obxod 236dev.exe	87
PID 1080 wrote to memory of 1592	1080	obxod 236dev.exe	87
PID 1080 wrote to memory of 2432	1080	obxod 236dev.exe	89
PID 1080 wrote to memory of 2432	1080	obxod 236dev.exe	89

C:\Users\Admin\AppData\Local\Temp\obxod236dev.exe
"C:\Users\Admin\AppData\Local\Temp\obxod236dev.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2800
- C:\Users\Admin\AppData\Roaming\obxod 236dev.exe
  "C:\Users\Admin\AppData\Roaming\obxod 236dev.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:1080
- - 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:4088
- - 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
    - Suspicious use of AdjustPrivilegeToken
    PID:3904
- - 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:1592
- - 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:2432
- 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:5004
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4028

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
d0a4a3b9a52b8fe3b019f6cd0ef3dad6

SHA1
fed70ce7834c3b97edbd078eccda1e5effa527cd

SHA256
21942e513f223fdad778348fbb20617dd29f986bccd87824c0ae7f15649f3f31

SHA512
1a66f837b4e7fb6346d0500aeacb44902fb8a239bce23416271263eba46fddae58a17075e188ae43eb516c841e02c87e32ebd73256c7cc2c0713d00c35f1761b

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

Filesize
944B

MD5
e8a7ab7bae6a69946da69507ee7ae7b0

SHA1
b367c72fa4948493819e1c32c32239aa6e78c252

SHA256
cd5480d72c1a359e83f7d6b6d7d21e1be2463f2c6718385cc6c393c88323b272

SHA512
89b22519bc3986be52801397e6eff4550621b4804abd2d04f431c9b2591ba8e3eab2625490a56ebb947ba3b122b6186badb6c461e917b69d7e13644c86a6f683

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

Filesize
944B

MD5
2e0391d00f5bfbc34be70790f14d5edf

SHA1
fcb04d8599c23967de4f154a101be480933ab0d0

SHA256
1c0c0c86d7c736fc9fb148ac7cd6e67565dc5b76fa116ae3b000a79e91855136

SHA512
231b9cc6efb928f0748cef04f287d9204c4f7d2eb4bc27f345e9a1afc6d0675057978ca44d1a95334ee2380709aa6dbe74015fedff8f17611a64efcfb9f64d2a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2is10wvh.vaq.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/1080-27-0x00007FF99E2A0000-0x00007FF99ED62000-memory.dmp

Filesize
10.8MB

Download
memory/1080-77-0x00007FF99E2A0000-0x00007FF99ED62000-memory.dmp

Filesize
10.8MB

Download
memory/1080-26-0x0000000000EA0000-0x0000000000EBA000-memory.dmp

Filesize
104KB

Download
memory/2800-0-0x00007FF99E2A3000-0x00007FF99E2A5000-memory.dmp

Filesize
8KB

Download
memory/2800-1-0x00000000009D0000-0x0000000000A28000-memory.dmp

Filesize
352KB

Download
memory/4088-39-0x000002456E700000-0x000002456E722000-memory.dmp

Filesize
136KB

Download
memory/5004-25-0x00000198E4490000-0x00000198E44D0000-memory.dmp

Filesize
256KB

Download
memory/5004-30-0x00007FF99E2A0000-0x00007FF99ED62000-memory.dmp

Filesize
10.8MB

Download
memory/5004-28-0x00007FF99E2A0000-0x00007FF99ED62000-memory.dmp

Filesize
10.8MB

Download