umbral | 921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76

Analysis

max time kernel
15s
max time network
19s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
14-12-2024 12:04

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General

Target

921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe
Size

231KB
MD5

85eadbe66e59f3512bfed3edd076ed4c
SHA1

3fac3f7414bd4ced53beb1d89402524a2b9cb510
SHA256

921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76
SHA512

18ca000aaec36bb3221cd70e042b1dd49ace60ff1469059eb4e27c0af8889d5dc31133827a97a8f146970097b70152e7e65d5286fa0721476c5b8cb06277637e
SSDEEP

6144:RloZM3rIkd8g+EtXHkv/iD4iYQ5ClU8e1mmN5i:joZIL+EP8Jo1Ng

Score

10^/10

umbral execution stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2792-1-0x0000000000930000-0x0000000000970000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Umbral family
umbral

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2860	powershell.exe
2148	powershell.exe
1136	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
8	discord.com
9	discord.com

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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3060	wmic.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2860	powershell.exe
2148	powershell.exe
1136	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe
Token: SeDebugPrivilege	2860	powershell.exe
Token: SeDebugPrivilege	2148	powershell.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: SeIncreaseQuotaPrivilege	2612	wmic.exe
Token: SeSecurityPrivilege	2612	wmic.exe
Token: SeTakeOwnershipPrivilege	2612	wmic.exe
Token: SeLoadDriverPrivilege	2612	wmic.exe
Token: SeSystemProfilePrivilege	2612	wmic.exe
Token: SeSystemtimePrivilege	2612	wmic.exe
Token: SeProfSingleProcessPrivilege	2612	wmic.exe
Token: SeIncBasePriorityPrivilege	2612	wmic.exe
Token: SeCreatePagefilePrivilege	2612	wmic.exe
Token: SeBackupPrivilege	2612	wmic.exe
Token: SeRestorePrivilege	2612	wmic.exe
Token: SeShutdownPrivilege	2612	wmic.exe
Token: SeDebugPrivilege	2612	wmic.exe
Token: SeSystemEnvironmentPrivilege	2612	wmic.exe
Token: SeRemoteShutdownPrivilege	2612	wmic.exe
Token: SeUndockPrivilege	2612	wmic.exe
Token: SeManageVolumePrivilege	2612	wmic.exe
Token: 33	2612	wmic.exe
Token: 34	2612	wmic.exe
Token: 35	2612	wmic.exe
Token: SeIncreaseQuotaPrivilege	2612	wmic.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2792 wrote to memory of 2860	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	29
PID 2792 wrote to memory of 2860	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	29
PID 2792 wrote to memory of 2860	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	29
PID 2792 wrote to memory of 2148	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	31
PID 2792 wrote to memory of 2148	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	31
PID 2792 wrote to memory of 2148	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	31
PID 2792 wrote to memory of 2608	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	33
PID 2792 wrote to memory of 2608	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	33
PID 2792 wrote to memory of 2608	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	33
PID 2792 wrote to memory of 2612	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	36
PID 2792 wrote to memory of 2612	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	36
PID 2792 wrote to memory of 2612	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	36
PID 2792 wrote to memory of 2352	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	38
PID 2792 wrote to memory of 2352	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	38
PID 2792 wrote to memory of 2352	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	38
PID 2792 wrote to memory of 1136	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	40
PID 2792 wrote to memory of 1136	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	40
PID 2792 wrote to memory of 1136	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	40
PID 2792 wrote to memory of 3060	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	42
PID 2792 wrote to memory of 3060	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	42
PID 2792 wrote to memory of 3060	2792	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	42

C:\Users\Admin\AppData\Local\Temp\921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe
"C:\Users\Admin\AppData\Local\Temp\921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2792
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2860
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2148
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2608
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2612
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2352
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:1136
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3060

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
4ffed714610259c64341a38f124c3b0d

SHA1
637bae46c5f897691962fc51ff95a2bca9912980

SHA256
859de1fb9eb42856ef1d59f545df19a3374ebceabd790dde077b27fbf45ba0ba

SHA512
db1d9b1147b38e04f26fc826205bdc245d16eea1802ed23e80bba523376c9c7616a5642f379e8be5ecaef973aeee28b146e5daf87eb590923a1b9f577ecd3ab8

Download Submit
memory/2148-24-0x0000000002360000-0x0000000002368000-memory.dmp

Filesize
32KB

Download
memory/2148-23-0x000000001B290000-0x000000001B572000-memory.dmp

Filesize
2.9MB

Download
memory/2792-16-0x000007FEF5E03000-0x000007FEF5E04000-memory.dmp

Filesize
4KB

Download
memory/2792-1-0x0000000000930000-0x0000000000970000-memory.dmp

Filesize
256KB

Download
memory/2792-2-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/2792-33-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/2792-0-0x000007FEF5E03000-0x000007FEF5E04000-memory.dmp

Filesize
4KB

Download
memory/2792-17-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/2860-8-0x000000001B220000-0x000000001B502000-memory.dmp

Filesize
2.9MB

Download
memory/2860-14-0x000007FEECF00000-0x000007FEED89D000-memory.dmp

Filesize
9.6MB

Download
memory/2860-15-0x000007FEECF00000-0x000007FEED89D000-memory.dmp

Filesize
9.6MB

Download
memory/2860-13-0x000007FEECF00000-0x000007FEED89D000-memory.dmp

Filesize
9.6MB

Download
memory/2860-12-0x000007FEECF00000-0x000007FEED89D000-memory.dmp

Filesize
9.6MB

Download
memory/2860-11-0x000007FEECF00000-0x000007FEED89D000-memory.dmp

Filesize
9.6MB

Download
memory/2860-10-0x000007FEECF00000-0x000007FEED89D000-memory.dmp

Filesize
9.6MB

Download
memory/2860-9-0x00000000024F0000-0x00000000024F8000-memory.dmp

Filesize
32KB

Download
memory/2860-7-0x000007FEED1BE000-0x000007FEED1BF000-memory.dmp

Filesize
4KB

Download