umbral | b4b6f0ce548f5ec6207bf0f8350011f953ef5d4011ff288ef5e2e0376cc18ded

Analysis

max time kernel
1s
max time network
5s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
26-10-2024 16:58

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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

resource	yara_rule
behavioral14/memory/4184-1-0x0000022AC29C0000-0x0000022AC2A00000-memory.dmp	family_umbral

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

flow	ioc
1	ip-api.com

Suspicious use of AdjustPrivilegeToken 43 IoCs

description	pid	Process
Token: SeDebugPrivilege	4184	fixserials.exe
Token: SeIncreaseQuotaPrivilege	336	wmic.exe
Token: SeSecurityPrivilege	336	wmic.exe
Token: SeTakeOwnershipPrivilege	336	wmic.exe
Token: SeLoadDriverPrivilege	336	wmic.exe
Token: SeSystemProfilePrivilege	336	wmic.exe
Token: SeSystemtimePrivilege	336	wmic.exe
Token: SeProfSingleProcessPrivilege	336	wmic.exe
Token: SeIncBasePriorityPrivilege	336	wmic.exe
Token: SeCreatePagefilePrivilege	336	wmic.exe
Token: SeBackupPrivilege	336	wmic.exe
Token: SeRestorePrivilege	336	wmic.exe
Token: SeShutdownPrivilege	336	wmic.exe
Token: SeDebugPrivilege	336	wmic.exe
Token: SeSystemEnvironmentPrivilege	336	wmic.exe
Token: SeRemoteShutdownPrivilege	336	wmic.exe
Token: SeUndockPrivilege	336	wmic.exe
Token: SeManageVolumePrivilege	336	wmic.exe
Token: 33	336	wmic.exe
Token: 34	336	wmic.exe
Token: 35	336	wmic.exe
Token: 36	336	wmic.exe
Token: SeIncreaseQuotaPrivilege	336	wmic.exe
Token: SeSecurityPrivilege	336	wmic.exe
Token: SeTakeOwnershipPrivilege	336	wmic.exe
Token: SeLoadDriverPrivilege	336	wmic.exe
Token: SeSystemProfilePrivilege	336	wmic.exe
Token: SeSystemtimePrivilege	336	wmic.exe
Token: SeProfSingleProcessPrivilege	336	wmic.exe
Token: SeIncBasePriorityPrivilege	336	wmic.exe
Token: SeCreatePagefilePrivilege	336	wmic.exe
Token: SeBackupPrivilege	336	wmic.exe
Token: SeRestorePrivilege	336	wmic.exe
Token: SeShutdownPrivilege	336	wmic.exe
Token: SeDebugPrivilege	336	wmic.exe
Token: SeSystemEnvironmentPrivilege	336	wmic.exe
Token: SeRemoteShutdownPrivilege	336	wmic.exe
Token: SeUndockPrivilege	336	wmic.exe
Token: SeManageVolumePrivilege	336	wmic.exe
Token: 33	336	wmic.exe
Token: 34	336	wmic.exe
Token: 35	336	wmic.exe
Token: 36	336	wmic.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4184 wrote to memory of 336	4184	fixserials.exe	80
PID 4184 wrote to memory of 336	4184	fixserials.exe	80

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:4184
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:336

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/4184-0-0x00007FFECDAB3000-0x00007FFECDAB5000-memory.dmp

Filesize
8KB

Download
memory/4184-1-0x0000022AC29C0000-0x0000022AC2A00000-memory.dmp

Filesize
256KB

Download
memory/4184-2-0x00007FFECDAB0000-0x00007FFECE572000-memory.dmp

Filesize
10.8MB

Download
memory/4184-4-0x00007FFECDAB0000-0x00007FFECE572000-memory.dmp

Filesize
10.8MB

Download