umbral | 51589dfe63f2e3a133e88b9cc629de666d6506b1984d2225e121b37ba4f571e9

Analysis

max time kernel
147s
max time network
138s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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

Extracted

Family

umbral

https://discord.com/api/webhooks/1342862584386420817/8iDLBPWkMbkgW0Lx9Tlnezr6EGJYKsdRBZ8GJHI66h0NchvKorRU-U6oiQsKR-OZeqD9

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral2/files/0x0008000000016edb-9.dat	family_umbral
behavioral2/memory/1932-12-0x0000000000FB0000-0x0000000000FF0000-memory.dmp	family_umbral

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x0007000000012118-5.dat	family_xworm
behavioral2/memory/3048-13-0x0000000000240000-0x000000000025A000-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
1996	powershell.exe
2040	powershell.exe
2872	powershell.exe
2648	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
3048	obxod 261dev.exe
1932	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-1-5-21-1488793075-819845221-1497111674-1000\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
6	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 5 IoCs

pid	Process
2872	powershell.exe
2648	powershell.exe
1996	powershell.exe
2040	powershell.exe
3048	obxod 261dev.exe

Suspicious use of AdjustPrivilegeToken 47 IoCs

description	pid	Process
Token: SeDebugPrivilege	3048	obxod 261dev.exe
Token: SeDebugPrivilege	1932	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2608	wmic.exe
Token: SeSecurityPrivilege	2608	wmic.exe
Token: SeTakeOwnershipPrivilege	2608	wmic.exe
Token: SeLoadDriverPrivilege	2608	wmic.exe
Token: SeSystemProfilePrivilege	2608	wmic.exe
Token: SeSystemtimePrivilege	2608	wmic.exe
Token: SeProfSingleProcessPrivilege	2608	wmic.exe
Token: SeIncBasePriorityPrivilege	2608	wmic.exe
Token: SeCreatePagefilePrivilege	2608	wmic.exe
Token: SeBackupPrivilege	2608	wmic.exe
Token: SeRestorePrivilege	2608	wmic.exe
Token: SeShutdownPrivilege	2608	wmic.exe
Token: SeDebugPrivilege	2608	wmic.exe
Token: SeSystemEnvironmentPrivilege	2608	wmic.exe
Token: SeRemoteShutdownPrivilege	2608	wmic.exe
Token: SeUndockPrivilege	2608	wmic.exe
Token: SeManageVolumePrivilege	2608	wmic.exe
Token: 33	2608	wmic.exe
Token: 34	2608	wmic.exe
Token: 35	2608	wmic.exe
Token: SeIncreaseQuotaPrivilege	2608	wmic.exe
Token: SeSecurityPrivilege	2608	wmic.exe
Token: SeTakeOwnershipPrivilege	2608	wmic.exe
Token: SeLoadDriverPrivilege	2608	wmic.exe
Token: SeSystemProfilePrivilege	2608	wmic.exe
Token: SeSystemtimePrivilege	2608	wmic.exe
Token: SeProfSingleProcessPrivilege	2608	wmic.exe
Token: SeIncBasePriorityPrivilege	2608	wmic.exe
Token: SeCreatePagefilePrivilege	2608	wmic.exe
Token: SeBackupPrivilege	2608	wmic.exe
Token: SeRestorePrivilege	2608	wmic.exe
Token: SeShutdownPrivilege	2608	wmic.exe
Token: SeDebugPrivilege	2608	wmic.exe
Token: SeSystemEnvironmentPrivilege	2608	wmic.exe
Token: SeRemoteShutdownPrivilege	2608	wmic.exe
Token: SeUndockPrivilege	2608	wmic.exe
Token: SeManageVolumePrivilege	2608	wmic.exe
Token: 33	2608	wmic.exe
Token: 34	2608	wmic.exe
Token: 35	2608	wmic.exe
Token: SeDebugPrivilege	2872	powershell.exe
Token: SeDebugPrivilege	2648	powershell.exe
Token: SeDebugPrivilege	1996	powershell.exe
Token: SeDebugPrivilege	2040	powershell.exe
Token: SeDebugPrivilege	3048	obxod 261dev.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3048	obxod 261dev.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 3048	2100	obxod261dev.exe	30
PID 2100 wrote to memory of 3048	2100	obxod261dev.exe	30
PID 2100 wrote to memory of 3048	2100	obxod261dev.exe	30
PID 2100 wrote to memory of 1932	2100	obxod261dev.exe	31
PID 2100 wrote to memory of 1932	2100	obxod261dev.exe	31
PID 2100 wrote to memory of 1932	2100	obxod261dev.exe	31
PID 3048 wrote to memory of 2872	3048	obxod 261dev.exe	32
PID 3048 wrote to memory of 2872	3048	obxod 261dev.exe	32
PID 3048 wrote to memory of 2872	3048	obxod 261dev.exe	32
PID 1932 wrote to memory of 2608	1932	Umbral.exe	34
PID 1932 wrote to memory of 2608	1932	Umbral.exe	34
PID 1932 wrote to memory of 2608	1932	Umbral.exe	34
PID 3048 wrote to memory of 2648	3048	obxod 261dev.exe	37
PID 3048 wrote to memory of 2648	3048	obxod 261dev.exe	37
PID 3048 wrote to memory of 2648	3048	obxod 261dev.exe	37
PID 3048 wrote to memory of 1996	3048	obxod 261dev.exe	39
PID 3048 wrote to memory of 1996	3048	obxod 261dev.exe	39
PID 3048 wrote to memory of 1996	3048	obxod 261dev.exe	39
PID 3048 wrote to memory of 2040	3048	obxod 261dev.exe	42
PID 3048 wrote to memory of 2040	3048	obxod 261dev.exe	42
PID 3048 wrote to memory of 2040	3048	obxod 261dev.exe	42

C:\Users\Admin\AppData\Local\Temp\obxod261dev.exe
"C:\Users\Admin\AppData\Local\Temp\obxod261dev.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2100
- 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:3048
- - 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:2872
- - 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:2648
- - 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:1996
- - 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:2040
- 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:1932
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2608

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
56607391e914efd0679956bad0403ad3

SHA1
47543db643180e4a69c3515d7c88ecc2698eab2b

SHA256
9527eabf3588c6b8be1b8139067eab8acb6010d4b005d65b361819066ccdfe5e

SHA512
0276058cf67dd4b290faf035aa2feccb9d0461de31e0fe6a934f2bf1709552b58aa95da85bfac6dd2784abb6ec031b6acf7c5fb301c5e3e6466586698ca43ea4

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/1932-12-0x0000000000FB0000-0x0000000000FF0000-memory.dmp

Filesize
256KB

Download
memory/2100-0-0x000007FEF5833000-0x000007FEF5834000-memory.dmp

Filesize
4KB

Download
memory/2100-1-0x00000000009C0000-0x0000000000A18000-memory.dmp

Filesize
352KB

Download
memory/2648-27-0x0000000002910000-0x0000000002918000-memory.dmp

Filesize
32KB

Download
memory/2648-26-0x000000001B6E0000-0x000000001B9C2000-memory.dmp

Filesize
2.9MB

Download
memory/2872-19-0x000000001B620000-0x000000001B902000-memory.dmp

Filesize
2.9MB

Download
memory/2872-20-0x0000000001E00000-0x0000000001E08000-memory.dmp

Filesize
32KB

Download
memory/3048-13-0x0000000000240000-0x000000000025A000-memory.dmp

Filesize
104KB

Download
memory/3048-14-0x000007FEF5830000-0x000007FEF621C000-memory.dmp

Filesize
9.9MB

Download
memory/3048-42-0x000007FEF5830000-0x000007FEF621C000-memory.dmp

Filesize
9.9MB

Download