Analysis
- max time kernel
99s - max time network
104s - platform
windows10-ltsc 2021_x64 - resource
win10ltsc2021-20241023-en - resource tags
arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system - submitted
24/10/2024, 19:50
Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win10v2004-20241007-en
windows10-2004-x64
5 signatures
150 seconds
General
- Target Umbral.exe
- Size 231KB
- Sample241024-ykkqrssbnp
- SHA256 e8857644b82de029a1405a44af687c1fe56b84321dfafa46ebeaefde2c6cc6d2
- MD5 2a34868cee558d4409d8fc0ba7739862
- SHA1 ce4ff55f6ff82fec5828fb46216b9932541c03f6
- SHA512 bb2b020fbb87ffe5f97382aacc3350517c7a65344f84ac06b3323e3590dc0a210eebdddd3bc3c74a099217488f0d836a1ffcb80fa23f60937b916429c7d383ab
- SSDEEP 6144:RloZM+rIkd8g+EtXHkv/iD4jHwtxds8e1mCi:joZtL+EP8rAx0U
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
- Detect Umbral payload 1 IoCs
resource yara_rule behavioral2/memory/4092-1-0x000001B645860000-0x000001B6458A0000-memory.dmp 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 7 ip-api.com - Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 4836 wmic.exe 4836 wmic.exe 4836 wmic.exe 4836 wmic.exe - Suspicious use of AdjustPrivilegeToken 43 IoCs
description pid Process Token: SeDebugPrivilege 4092 Umbral.exe Token: SeIncreaseQuotaPrivilege 4836 wmic.exe Token: SeSecurityPrivilege 4836 wmic.exe Token: SeTakeOwnershipPrivilege 4836 wmic.exe Token: SeLoadDriverPrivilege 4836 wmic.exe Token: SeSystemProfilePrivilege 4836 wmic.exe Token: SeSystemtimePrivilege 4836 wmic.exe Token: SeProfSingleProcessPrivilege 4836 wmic.exe Token: SeIncBasePriorityPrivilege 4836 wmic.exe Token: SeCreatePagefilePrivilege 4836 wmic.exe Token: SeBackupPrivilege 4836 wmic.exe Token: SeRestorePrivilege 4836 wmic.exe Token: SeShutdownPrivilege 4836 wmic.exe Token: SeDebugPrivilege 4836 wmic.exe Token: SeSystemEnvironmentPrivilege 4836 wmic.exe Token: SeRemoteShutdownPrivilege 4836 wmic.exe Token: SeUndockPrivilege 4836 wmic.exe Token: SeManageVolumePrivilege 4836 wmic.exe Token: 33 4836 wmic.exe Token: 34 4836 wmic.exe Token: 35 4836 wmic.exe Token: 36 4836 wmic.exe Token: SeIncreaseQuotaPrivilege 4836 wmic.exe Token: SeSecurityPrivilege 4836 wmic.exe Token: SeTakeOwnershipPrivilege 4836 wmic.exe Token: SeLoadDriverPrivilege 4836 wmic.exe Token: SeSystemProfilePrivilege 4836 wmic.exe Token: SeSystemtimePrivilege 4836 wmic.exe Token: SeProfSingleProcessPrivilege 4836 wmic.exe Token: SeIncBasePriorityPrivilege 4836 wmic.exe Token: SeCreatePagefilePrivilege 4836 wmic.exe Token: SeBackupPrivilege 4836 wmic.exe Token: SeRestorePrivilege 4836 wmic.exe Token: SeShutdownPrivilege 4836 wmic.exe Token: SeDebugPrivilege 4836 wmic.exe Token: SeSystemEnvironmentPrivilege 4836 wmic.exe Token: SeRemoteShutdownPrivilege 4836 wmic.exe Token: SeUndockPrivilege 4836 wmic.exe Token: SeManageVolumePrivilege 4836 wmic.exe Token: 33 4836 wmic.exe Token: 34 4836 wmic.exe Token: 35 4836 wmic.exe Token: 36 4836 wmic.exe - Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 4092 wrote to memory of 4836 4092 Umbral.exe 80 PID 4092 wrote to memory of 4836 4092 Umbral.exe 80
Processes
-
C:\Users\Admin\AppData\Local\Temp\Umbral.exe"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4092 -
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4836
-