umbral | b4b6f0ce548f5ec6207bf0f8350011f953ef5d4011ff288ef5e2e0376cc18ded

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-10-2024 08:38

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General

Target

Perm Spoofer/dumped files/fixserials.exe
Size

229KB
MD5

9252505656ab18c34d4ecff6a7f86263
SHA1

dfa01cbe5c99fbf67a5063f99c67669382e43356
SHA256

78da8433390c0aaf2e5f748ff266bacad23fe9d05b1834eabceeb6ad69859589
SHA512

5e270de9982c3137c16e32fa4c88f9a414893c623fbcdd5cb2f3ff9bbf82eac82bb8d01100d60ea8633da875b36df39d657a9090e393d4fdf717575821bce8a5
SSDEEP

6144:lloZMcrIkd8g+EtXHkv/iD4l6qZEKtFu9r20VJgU8b8e1mbDi:noZrL+EP8l6qZEKtFu9r20VJgZd

Score

10^/10

umbral stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

Processes:

resource	yara_rule
behavioral27/memory/5080-1-0x00000164FD5B0000-0x00000164FD5F0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

7 ip-api.com

flow	ioc
7	ip-api.com

Suspicious use of AdjustPrivilegeToken 43 IoCs

Processes:

fixserials.exewmic.exe

description	pid	process
Token: SeDebugPrivilege	5080	fixserials.exe
Token: SeIncreaseQuotaPrivilege	1344	wmic.exe
Token: SeSecurityPrivilege	1344	wmic.exe
Token: SeTakeOwnershipPrivilege	1344	wmic.exe
Token: SeLoadDriverPrivilege	1344	wmic.exe
Token: SeSystemProfilePrivilege	1344	wmic.exe
Token: SeSystemtimePrivilege	1344	wmic.exe
Token: SeProfSingleProcessPrivilege	1344	wmic.exe
Token: SeIncBasePriorityPrivilege	1344	wmic.exe
Token: SeCreatePagefilePrivilege	1344	wmic.exe
Token: SeBackupPrivilege	1344	wmic.exe
Token: SeRestorePrivilege	1344	wmic.exe
Token: SeShutdownPrivilege	1344	wmic.exe
Token: SeDebugPrivilege	1344	wmic.exe
Token: SeSystemEnvironmentPrivilege	1344	wmic.exe
Token: SeRemoteShutdownPrivilege	1344	wmic.exe
Token: SeUndockPrivilege	1344	wmic.exe
Token: SeManageVolumePrivilege	1344	wmic.exe
Token: 33	1344	wmic.exe
Token: 34	1344	wmic.exe
Token: 35	1344	wmic.exe
Token: 36	1344	wmic.exe
Token: SeIncreaseQuotaPrivilege	1344	wmic.exe
Token: SeSecurityPrivilege	1344	wmic.exe
Token: SeTakeOwnershipPrivilege	1344	wmic.exe
Token: SeLoadDriverPrivilege	1344	wmic.exe
Token: SeSystemProfilePrivilege	1344	wmic.exe
Token: SeSystemtimePrivilege	1344	wmic.exe
Token: SeProfSingleProcessPrivilege	1344	wmic.exe
Token: SeIncBasePriorityPrivilege	1344	wmic.exe
Token: SeCreatePagefilePrivilege	1344	wmic.exe
Token: SeBackupPrivilege	1344	wmic.exe
Token: SeRestorePrivilege	1344	wmic.exe
Token: SeShutdownPrivilege	1344	wmic.exe
Token: SeDebugPrivilege	1344	wmic.exe
Token: SeSystemEnvironmentPrivilege	1344	wmic.exe
Token: SeRemoteShutdownPrivilege	1344	wmic.exe
Token: SeUndockPrivilege	1344	wmic.exe
Token: SeManageVolumePrivilege	1344	wmic.exe
Token: 33	1344	wmic.exe
Token: 34	1344	wmic.exe
Token: 35	1344	wmic.exe
Token: 36	1344	wmic.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

fixserials.exe

description	pid	process	target process
PID 5080 wrote to memory of 1344	5080	fixserials.exe	wmic.exe
PID 5080 wrote to memory of 1344	5080	fixserials.exe	wmic.exe

C:\Users\Admin\AppData\Local\Temp\Perm Spoofer\dumped files\fixserials.exe
"C:\Users\Admin\AppData\Local\Temp\Perm Spoofer\dumped files\fixserials.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5080
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1344

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/5080-0-0x00007FFCCF4F3000-0x00007FFCCF4F5000-memory.dmp

Filesize
8KB

Download
memory/5080-1-0x00000164FD5B0000-0x00000164FD5F0000-memory.dmp

Filesize
256KB

Download
memory/5080-2-0x00007FFCCF4F0000-0x00007FFCCFFB1000-memory.dmp

Filesize
10.8MB

Download
memory/5080-4-0x00007FFCCF4F0000-0x00007FFCCFFB1000-memory.dmp

Filesize
10.8MB

Download