umbral | 41bd71f64646577e8e4fc79614529ce08ab74dd5c8a67ccafbd46509e0b6bfa0

Analysis

max time kernel
25s
max time network
26s
platform
windows11-21h2_x64
resource
win11-20240214-en
resource tags

arch:x64arch:x86image:win11-20240214-enlocale:en-usos:windows11-21h2-x64system
submitted
26-03-2024 21:20

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General

Target

log.exe
Size

227KB
MD5

6f38d62a2d7181a1572e956335e8dd32
SHA1

a530f62073d14fa589bd3ea1309975bb4e19d2b3
SHA256

41bd71f64646577e8e4fc79614529ce08ab74dd5c8a67ccafbd46509e0b6bfa0
SHA512

b688682e879e715ffcc0f98c041cb0ee23de19410843cf755d39754d71c256128bcbe6f3b18cbd33eb16fa762effb03f9ae18e9cf2b8944a826fc313bad4ff6f
SSDEEP

6144:+loZMzrIkd8g+EtXHkv/iD4ll7E9cCFdWLj+ctBIZDb8e1m3i:ooZcL+EP8ll7E9cCFdWLj+ctBItt

Score

10^/10

umbral stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/3328-0-0x000002663CEE0000-0x000002663CF20000-memory.dmp	family_umbral

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

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3328	log.exe
Token: SeIncreaseQuotaPrivilege	5020	wmic.exe
Token: SeSecurityPrivilege	5020	wmic.exe
Token: SeTakeOwnershipPrivilege	5020	wmic.exe
Token: SeLoadDriverPrivilege	5020	wmic.exe
Token: SeSystemProfilePrivilege	5020	wmic.exe
Token: SeSystemtimePrivilege	5020	wmic.exe
Token: SeProfSingleProcessPrivilege	5020	wmic.exe
Token: SeIncBasePriorityPrivilege	5020	wmic.exe
Token: SeCreatePagefilePrivilege	5020	wmic.exe
Token: SeBackupPrivilege	5020	wmic.exe
Token: SeRestorePrivilege	5020	wmic.exe
Token: SeShutdownPrivilege	5020	wmic.exe
Token: SeDebugPrivilege	5020	wmic.exe
Token: SeSystemEnvironmentPrivilege	5020	wmic.exe
Token: SeRemoteShutdownPrivilege	5020	wmic.exe
Token: SeUndockPrivilege	5020	wmic.exe
Token: SeManageVolumePrivilege	5020	wmic.exe
Token: 33	5020	wmic.exe
Token: 34	5020	wmic.exe
Token: 35	5020	wmic.exe
Token: 36	5020	wmic.exe
Token: SeIncreaseQuotaPrivilege	5020	wmic.exe
Token: SeSecurityPrivilege	5020	wmic.exe
Token: SeTakeOwnershipPrivilege	5020	wmic.exe
Token: SeLoadDriverPrivilege	5020	wmic.exe
Token: SeSystemProfilePrivilege	5020	wmic.exe
Token: SeSystemtimePrivilege	5020	wmic.exe
Token: SeProfSingleProcessPrivilege	5020	wmic.exe
Token: SeIncBasePriorityPrivilege	5020	wmic.exe
Token: SeCreatePagefilePrivilege	5020	wmic.exe
Token: SeBackupPrivilege	5020	wmic.exe
Token: SeRestorePrivilege	5020	wmic.exe
Token: SeShutdownPrivilege	5020	wmic.exe
Token: SeDebugPrivilege	5020	wmic.exe
Token: SeSystemEnvironmentPrivilege	5020	wmic.exe
Token: SeRemoteShutdownPrivilege	5020	wmic.exe
Token: SeUndockPrivilege	5020	wmic.exe
Token: SeManageVolumePrivilege	5020	wmic.exe
Token: 33	5020	wmic.exe
Token: 34	5020	wmic.exe
Token: 35	5020	wmic.exe
Token: 36	5020	wmic.exe
Token: SeDebugPrivilege	3660	log.exe
Token: SeIncreaseQuotaPrivilege	832	wmic.exe
Token: SeSecurityPrivilege	832	wmic.exe
Token: SeTakeOwnershipPrivilege	832	wmic.exe
Token: SeLoadDriverPrivilege	832	wmic.exe
Token: SeSystemProfilePrivilege	832	wmic.exe
Token: SeSystemtimePrivilege	832	wmic.exe
Token: SeProfSingleProcessPrivilege	832	wmic.exe
Token: SeIncBasePriorityPrivilege	832	wmic.exe
Token: SeCreatePagefilePrivilege	832	wmic.exe
Token: SeBackupPrivilege	832	wmic.exe
Token: SeRestorePrivilege	832	wmic.exe
Token: SeShutdownPrivilege	832	wmic.exe
Token: SeDebugPrivilege	832	wmic.exe
Token: SeSystemEnvironmentPrivilege	832	wmic.exe
Token: SeRemoteShutdownPrivilege	832	wmic.exe
Token: SeUndockPrivilege	832	wmic.exe
Token: SeManageVolumePrivilege	832	wmic.exe
Token: 33	832	wmic.exe
Token: 34	832	wmic.exe
Token: 35	832	wmic.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3328 wrote to memory of 5020	3328	log.exe	76
PID 3328 wrote to memory of 5020	3328	log.exe	76
PID 3660 wrote to memory of 832	3660	log.exe	84
PID 3660 wrote to memory of 832	3660	log.exe	84

C:\Users\Admin\AppData\Local\Temp\log.exe
"C:\Users\Admin\AppData\Local\Temp\log.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3328
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5020

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:5040

C:\Users\Admin\AppData\Local\Temp\log.exe
"C:\Users\Admin\AppData\Local\Temp\log.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3660
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:832

Network

MITRE ATT&CK Matrix

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\log.exe.log

Filesize
1KB

MD5
02df789e3c730b309fc4d9abce5d729b

SHA1
4f9da0f0d4cadacfd0f68fb1f7ee73a66dcf1b4e

SHA256
4afabcd1723096359d90c8f32df7a6a44cd866e89d5b37c89280bfeab61d7321

SHA512
7ac0dd7e3a3e483d07409da793dd2b0915d4369fe41fe743acd82de9aa77b9fa7ea5cd60498034f3fa0674d93d184c9128375d8f7f0796fddecff3845fca8587

Download Submit
memory/3328-0-0x000002663CEE0000-0x000002663CF20000-memory.dmp

Filesize
256KB

Download
memory/3328-1-0x00007FFBE2F80000-0x00007FFBE3A42000-memory.dmp

Filesize
10.8MB

Download
memory/3328-2-0x00000266573D0000-0x00000266573E0000-memory.dmp

Filesize
64KB

Download
memory/3328-4-0x00007FFBE2F80000-0x00007FFBE3A42000-memory.dmp

Filesize
10.8MB

Download
memory/3660-6-0x00007FFBE2F80000-0x00007FFBE3A42000-memory.dmp

Filesize
10.8MB

Download
memory/3660-7-0x0000026BC98C0000-0x0000026BC98D0000-memory.dmp

Filesize
64KB

Download
memory/3660-8-0x00007FFBE2F80000-0x00007FFBE3A42000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix

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Downloads