umbral | dc7f8c7c39bb043da2c19a03504c499e0af367fefee810a8190c1119992e2248

Analysis

max time kernel
148s
max time network
151s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
23-02-2025 10:42

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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

Extracted

Family

umbral

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

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral2/files/0x0008000000016d36-10.dat	family_umbral
behavioral2/memory/1724-13-0x0000000000900000-0x0000000000940000-memory.dmp	family_umbral

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x00090000000120ce-5.dat	family_xworm
behavioral2/memory/2536-12-0x0000000001100000-0x000000000111A000-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
2744	powershell.exe
2664	powershell.exe
1464	powershell.exe
1108	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 266dev.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	obxod 266dev.exe

Executes dropped EXE 2 IoCs

pid	Process
2536	obxod 266dev.exe
1724	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-1-5-21-4177215427-74451935-3209572229-1000\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
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
2744	powershell.exe
2664	powershell.exe
1464	powershell.exe
1108	powershell.exe
2536	obxod 266dev.exe

Suspicious use of AdjustPrivilegeToken 47 IoCs

description	pid	Process
Token: SeDebugPrivilege	2536	obxod 266dev.exe
Token: SeDebugPrivilege	1724	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2772	wmic.exe
Token: SeSecurityPrivilege	2772	wmic.exe
Token: SeTakeOwnershipPrivilege	2772	wmic.exe
Token: SeLoadDriverPrivilege	2772	wmic.exe
Token: SeSystemProfilePrivilege	2772	wmic.exe
Token: SeSystemtimePrivilege	2772	wmic.exe
Token: SeProfSingleProcessPrivilege	2772	wmic.exe
Token: SeIncBasePriorityPrivilege	2772	wmic.exe
Token: SeCreatePagefilePrivilege	2772	wmic.exe
Token: SeBackupPrivilege	2772	wmic.exe
Token: SeRestorePrivilege	2772	wmic.exe
Token: SeShutdownPrivilege	2772	wmic.exe
Token: SeDebugPrivilege	2772	wmic.exe
Token: SeSystemEnvironmentPrivilege	2772	wmic.exe
Token: SeRemoteShutdownPrivilege	2772	wmic.exe
Token: SeUndockPrivilege	2772	wmic.exe
Token: SeManageVolumePrivilege	2772	wmic.exe
Token: 33	2772	wmic.exe
Token: 34	2772	wmic.exe
Token: 35	2772	wmic.exe
Token: SeIncreaseQuotaPrivilege	2772	wmic.exe
Token: SeSecurityPrivilege	2772	wmic.exe
Token: SeTakeOwnershipPrivilege	2772	wmic.exe
Token: SeLoadDriverPrivilege	2772	wmic.exe
Token: SeSystemProfilePrivilege	2772	wmic.exe
Token: SeSystemtimePrivilege	2772	wmic.exe
Token: SeProfSingleProcessPrivilege	2772	wmic.exe
Token: SeIncBasePriorityPrivilege	2772	wmic.exe
Token: SeCreatePagefilePrivilege	2772	wmic.exe
Token: SeBackupPrivilege	2772	wmic.exe
Token: SeRestorePrivilege	2772	wmic.exe
Token: SeShutdownPrivilege	2772	wmic.exe
Token: SeDebugPrivilege	2772	wmic.exe
Token: SeSystemEnvironmentPrivilege	2772	wmic.exe
Token: SeRemoteShutdownPrivilege	2772	wmic.exe
Token: SeUndockPrivilege	2772	wmic.exe
Token: SeManageVolumePrivilege	2772	wmic.exe
Token: 33	2772	wmic.exe
Token: 34	2772	wmic.exe
Token: 35	2772	wmic.exe
Token: SeDebugPrivilege	2744	powershell.exe
Token: SeDebugPrivilege	2664	powershell.exe
Token: SeDebugPrivilege	1464	powershell.exe
Token: SeDebugPrivilege	1108	powershell.exe
Token: SeDebugPrivilege	2536	obxod 266dev.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2536	obxod 266dev.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 2536	1700	obxod266dev.exe	30
PID 1700 wrote to memory of 2536	1700	obxod266dev.exe	30
PID 1700 wrote to memory of 2536	1700	obxod266dev.exe	30
PID 1700 wrote to memory of 1724	1700	obxod266dev.exe	31
PID 1700 wrote to memory of 1724	1700	obxod266dev.exe	31
PID 1700 wrote to memory of 1724	1700	obxod266dev.exe	31
PID 2536 wrote to memory of 2744	2536	obxod 266dev.exe	32
PID 2536 wrote to memory of 2744	2536	obxod 266dev.exe	32
PID 2536 wrote to memory of 2744	2536	obxod 266dev.exe	32
PID 1724 wrote to memory of 2772	1724	Umbral.exe	34
PID 1724 wrote to memory of 2772	1724	Umbral.exe	34
PID 1724 wrote to memory of 2772	1724	Umbral.exe	34
PID 2536 wrote to memory of 2664	2536	obxod 266dev.exe	37
PID 2536 wrote to memory of 2664	2536	obxod 266dev.exe	37
PID 2536 wrote to memory of 2664	2536	obxod 266dev.exe	37
PID 2536 wrote to memory of 1464	2536	obxod 266dev.exe	39
PID 2536 wrote to memory of 1464	2536	obxod 266dev.exe	39
PID 2536 wrote to memory of 1464	2536	obxod 266dev.exe	39
PID 2536 wrote to memory of 1108	2536	obxod 266dev.exe	41
PID 2536 wrote to memory of 1108	2536	obxod 266dev.exe	41
PID 2536 wrote to memory of 1108	2536	obxod 266dev.exe	41

C:\Users\Admin\AppData\Local\Temp\obxod266dev.exe
"C:\Users\Admin\AppData\Local\Temp\obxod266dev.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1700
- 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:2536
- - 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:2744
- - 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:2664
- - 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:1464
- - 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:1108
- 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:1724
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2772

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\RBKGEDXJIQHOLM1J24FH.temp

Filesize
7KB

MD5
d259abda90ff9ccbf6cca19bd0de7da0

SHA1
73b7552fa14aef2e3e5adf362f47008746c621c0

SHA256
bc845cf5c196f0d2dc394bb56100ead109320c0e0066986ef43a3f3e5fb2ddcc

SHA512
0f6c9274fda5a1b121e96c6b5581d65589c8401a26fc65fb53f34999fb44b6aa02d25f09f7e0893b2bcecb6e08497cbe554cf828785486ba9056acb2bc1709f9

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/1700-0-0x000007FEF58D3000-0x000007FEF58D4000-memory.dmp

Filesize
4KB

Download
memory/1700-1-0x0000000000C70000-0x0000000000CC8000-memory.dmp

Filesize
352KB

Download
memory/1724-13-0x0000000000900000-0x0000000000940000-memory.dmp

Filesize
256KB

Download
memory/2536-12-0x0000000001100000-0x000000000111A000-memory.dmp

Filesize
104KB

Download
memory/2536-14-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download
memory/2536-43-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download
memory/2664-26-0x000000001B8A0000-0x000000001BB82000-memory.dmp

Filesize
2.9MB

Download
memory/2664-27-0x0000000001F70000-0x0000000001F78000-memory.dmp

Filesize
32KB

Download
memory/2744-19-0x000000001B7C0000-0x000000001BAA2000-memory.dmp

Filesize
2.9MB

Download
memory/2744-20-0x0000000001E10000-0x0000000001E18000-memory.dmp

Filesize
32KB

Download