umbral | dc7f8c7c39bb043da2c19a03504c499e0af367fefee810a8190c1119992e2248

Analysis

max time kernel
147s
max time network
151s
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

obxod266dev.exe
Size

329KB
MD5

31fc82eeaed45f2389b57ffb9d8f6ea2
SHA1

fd46d4e307b09a372a3bfc0d88b87eeccaf77912
SHA256

dc7f8c7c39bb043da2c19a03504c499e0af367fefee810a8190c1119992e2248
SHA512

418bca3b27a8354e559de8e1333ebc8ff42a5d4f07b42a0ec95775c9a52feb1d61a00006ceefef3be8e30dc07c0fb3123440413a2b16d8d9cc6e468cb9d5c962
SSDEEP

6144:3aDaK7MooumCpZSApAWl2IenY7YDlw+JmS1r8+CMCX:3LK7sk2IKYkp/mYPCX

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
behavioral1/files/0x001c00000002ae37-16.dat	family_umbral
behavioral1/memory/4072-24-0x000001EA56990000-0x000001EA569D0000-memory.dmp	family_umbral

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000e0000000266eb-6.dat	family_xworm
behavioral1/memory/3796-26-0x0000000000F10000-0x0000000000F2A000-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
1304	powershell.exe
4348	powershell.exe
4944	powershell.exe
2468	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	obxod 266dev.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	obxod 266dev.exe

Executes dropped EXE 2 IoCs

pid	Process
3796	obxod 266dev.exe
4072	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-1-5-21-501547156-4130638328-323075719-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	obxod 266dev.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
4944	powershell.exe
4944	powershell.exe
2468	powershell.exe
2468	powershell.exe
1304	powershell.exe
1304	powershell.exe
4348	powershell.exe
4348	powershell.exe
3796	obxod 266dev.exe

Suspicious use of AdjustPrivilegeToken 49 IoCs

description	pid	Process
Token: SeDebugPrivilege	3796	obxod 266dev.exe
Token: SeDebugPrivilege	4072	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2600	wmic.exe
Token: SeSecurityPrivilege	2600	wmic.exe
Token: SeTakeOwnershipPrivilege	2600	wmic.exe
Token: SeLoadDriverPrivilege	2600	wmic.exe
Token: SeSystemProfilePrivilege	2600	wmic.exe
Token: SeSystemtimePrivilege	2600	wmic.exe
Token: SeProfSingleProcessPrivilege	2600	wmic.exe
Token: SeIncBasePriorityPrivilege	2600	wmic.exe
Token: SeCreatePagefilePrivilege	2600	wmic.exe
Token: SeBackupPrivilege	2600	wmic.exe
Token: SeRestorePrivilege	2600	wmic.exe
Token: SeShutdownPrivilege	2600	wmic.exe
Token: SeDebugPrivilege	2600	wmic.exe
Token: SeSystemEnvironmentPrivilege	2600	wmic.exe
Token: SeRemoteShutdownPrivilege	2600	wmic.exe
Token: SeUndockPrivilege	2600	wmic.exe
Token: SeManageVolumePrivilege	2600	wmic.exe
Token: 33	2600	wmic.exe
Token: 34	2600	wmic.exe
Token: 35	2600	wmic.exe
Token: 36	2600	wmic.exe
Token: SeIncreaseQuotaPrivilege	2600	wmic.exe
Token: SeSecurityPrivilege	2600	wmic.exe
Token: SeTakeOwnershipPrivilege	2600	wmic.exe
Token: SeLoadDriverPrivilege	2600	wmic.exe
Token: SeSystemProfilePrivilege	2600	wmic.exe
Token: SeSystemtimePrivilege	2600	wmic.exe
Token: SeProfSingleProcessPrivilege	2600	wmic.exe
Token: SeIncBasePriorityPrivilege	2600	wmic.exe
Token: SeCreatePagefilePrivilege	2600	wmic.exe
Token: SeBackupPrivilege	2600	wmic.exe
Token: SeRestorePrivilege	2600	wmic.exe
Token: SeShutdownPrivilege	2600	wmic.exe
Token: SeDebugPrivilege	2600	wmic.exe
Token: SeSystemEnvironmentPrivilege	2600	wmic.exe
Token: SeRemoteShutdownPrivilege	2600	wmic.exe
Token: SeUndockPrivilege	2600	wmic.exe
Token: SeManageVolumePrivilege	2600	wmic.exe
Token: 33	2600	wmic.exe
Token: 34	2600	wmic.exe
Token: 35	2600	wmic.exe
Token: 36	2600	wmic.exe
Token: SeDebugPrivilege	4944	powershell.exe
Token: SeDebugPrivilege	2468	powershell.exe
Token: SeDebugPrivilege	1304	powershell.exe
Token: SeDebugPrivilege	4348	powershell.exe
Token: SeDebugPrivilege	3796	obxod 266dev.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3796	obxod 266dev.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3860 wrote to memory of 3796	3860	obxod266dev.exe	78
PID 3860 wrote to memory of 3796	3860	obxod266dev.exe	78
PID 3860 wrote to memory of 4072	3860	obxod266dev.exe	79
PID 3860 wrote to memory of 4072	3860	obxod266dev.exe	79
PID 4072 wrote to memory of 2600	4072	Umbral.exe	80
PID 4072 wrote to memory of 2600	4072	Umbral.exe	80
PID 3796 wrote to memory of 4944	3796	obxod 266dev.exe	83
PID 3796 wrote to memory of 4944	3796	obxod 266dev.exe	83
PID 3796 wrote to memory of 2468	3796	obxod 266dev.exe	85
PID 3796 wrote to memory of 2468	3796	obxod 266dev.exe	85
PID 3796 wrote to memory of 1304	3796	obxod 266dev.exe	87
PID 3796 wrote to memory of 1304	3796	obxod 266dev.exe	87
PID 3796 wrote to memory of 4348	3796	obxod 266dev.exe	89
PID 3796 wrote to memory of 4348	3796	obxod 266dev.exe	89

C:\Users\Admin\AppData\Local\Temp\obxod266dev.exe
"C:\Users\Admin\AppData\Local\Temp\obxod266dev.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3860
- C:\Users\Admin\AppData\Roaming\obxod 266dev.exe
  "C:\Users\Admin\AppData\Roaming\obxod 266dev.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:3796
- - 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 266dev.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4944
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'obxod 266dev.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2468
- - 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:1304
- - 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:4348
- 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:4072
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2600

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

Replay Monitor

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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
e3840d9bcedfe7017e49ee5d05bd1c46

SHA1
272620fb2605bd196df471d62db4b2d280a363c6

SHA256
3ac83e70415b9701ee71a4560232d7998e00c3db020fde669eb01b8821d2746f

SHA512
76adc88ab3930acc6b8b7668e2de797b8c00edcfc41660ee4485259c72a8adf162db62c2621ead5a9950f12bfe8a76ccab79d02fda11860afb0e217812cac376

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

Filesize
944B

MD5
80707036df540b6657f9d443b449e3c3

SHA1
b3e7d5d97274942164bf93c8c4b8a9b68713f46f

SHA256
6651e5f976619cef991deef61776cf43d4c4b3d7c551dd2192b647df71586ab0

SHA512
65e41e9e730fed4f7a7d3f6f35875a16948b897f87c8c70b371fd0ac7f0951814f6a75e7698665194bbc65a3665a684e7be229e7e24193b50483ae7e55eebf4f

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

Filesize
944B

MD5
f7c2841e14f36eb17523d91cb4393a62

SHA1
081723a8788ca586be56109f5f57237c3e716a54

SHA256
94caaf950c88d99d19f4c99341055a65d262a758de2decee3f1f90a3f4c81dd4

SHA512
6bdf5524183eef40a94667fd133a353346cec6fc7ac5f628e763f07734343b59b64b5248fb4fcba0dca5b1be34f6127cf372555ca95340b95a59ed5387f75f52

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ajztkirj.et4.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 266dev.exe

Filesize
80KB

MD5
3598f860aacfe53b00c305715a6c7b2f

SHA1
70640b2e8a71017cdf5fb8e91fe0b065f89a064b

SHA256
b4b8385381c3bb23d821f179a73ff19083d15f7cc6e1c9cc2235da3c382db241

SHA512
0b2bfa9e701ba126acb6bf9b9b5df26e8558a59708659ec2981173267d277f44e6b6575f1ceb945a86705796ea8f50c5cd1617ee45fdaabdc68af9b2022e654c

Download Submit
memory/3796-26-0x0000000000F10000-0x0000000000F2A000-memory.dmp

Filesize
104KB

Download
memory/3796-77-0x00007FFB6DA70000-0x00007FFB6E532000-memory.dmp

Filesize
10.8MB

Download
memory/3796-28-0x00007FFB6DA70000-0x00007FFB6E532000-memory.dmp

Filesize
10.8MB

Download
memory/3860-1-0x0000000000AE0000-0x0000000000B38000-memory.dmp

Filesize
352KB

Download
memory/3860-0-0x00007FFB6DA73000-0x00007FFB6DA75000-memory.dmp

Filesize
8KB

Download
memory/4072-24-0x000001EA56990000-0x000001EA569D0000-memory.dmp

Filesize
256KB

Download
memory/4072-30-0x00007FFB6DA70000-0x00007FFB6E532000-memory.dmp

Filesize
10.8MB

Download
memory/4072-27-0x00007FFB6DA70000-0x00007FFB6E532000-memory.dmp

Filesize
10.8MB

Download
memory/4944-31-0x000001C964E30000-0x000001C964E52000-memory.dmp

Filesize
136KB

Download