umbral | 4a9d829d1caa33793d986642b519ee710b3d1af421f975096e5e09c0ef4e78f8

Analysis

max time kernel
94s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03-12-2024 22:07

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General

Target

4a9d829d1caa33793d986642b519ee710b3d1af421f975096e5e09c0ef4e78f8.exe
Size

1.0MB
MD5

5a5cbc6f945837008dc0d0ead368992d
SHA1

aba12623631d97ba90e4c827d19237ac70513ab1
SHA256

4a9d829d1caa33793d986642b519ee710b3d1af421f975096e5e09c0ef4e78f8
SHA512

1f6b6e31ddcc0be6661673e71ef8d90f9dfe144b385de1a355d2603e40d0293a575b0e64e4478959c03fcf03d48b73c20155e8907f7b39832ab1d9fb2193178b
SSDEEP

24576:ZVvTLevDohsF9gI8kgn9GuBH0dP6aPpBY87n777M777777u:ZVrLNsHL7n777M777777

Score

10^/10

umbral discovery stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1316-1-0x0000000000C40000-0x0000000000D4E000-memory.dmp	family_umbral

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	4a9d829d1caa33793d986642b519ee710b3d1af421f975096e5e09c0ef4e78f8.exe

Executes dropped EXE 1 IoCs

pid	Process
3584	TL.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4a9d829d1caa33793d986642b519ee710b3d1af421f975096e5e09c0ef4e78f8.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings	4a9d829d1caa33793d986642b519ee710b3d1af421f975096e5e09c0ef4e78f8.exe
Key created	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings	OpenWith.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3996	OpenWith.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1316 wrote to memory of 3584	1316	4a9d829d1caa33793d986642b519ee710b3d1af421f975096e5e09c0ef4e78f8.exe	83
PID 1316 wrote to memory of 3584	1316	4a9d829d1caa33793d986642b519ee710b3d1af421f975096e5e09c0ef4e78f8.exe	83

C:\Users\Admin\AppData\Local\Temp\4a9d829d1caa33793d986642b519ee710b3d1af421f975096e5e09c0ef4e78f8.exe
"C:\Users\Admin\AppData\Local\Temp\4a9d829d1caa33793d986642b519ee710b3d1af421f975096e5e09c0ef4e78f8.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1316
- C:\Users\Admin\AppData\Local\Temp\TL.exe
  "C:\Users\Admin\AppData\Local\Temp\TL.exe"
  2⤵
  - Executes dropped EXE
  PID:3584

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:3996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
583KB

MD5
690272e4fb07da4793b636eac9cc6733

SHA1
3e1baebcfddd4f2e372272cb5ed530cee5b8f145

SHA256
969e8f0ca48c14a43ae7eeda3674d0788830958f6010f98c9f58eab4502d2a6c

SHA512
add4a5e66af20878b8e026a5ac7d3e5c71ef9ccae14c10e4ee1388d6b843db5b9d9b306e2116235a21c340eb758e54081d3770404b13c12a83bd135bff78a45c

Download Submit
memory/1316-0-0x00000000745DE000-0x00000000745DF000-memory.dmp

Filesize
4KB

Download
memory/1316-1-0x0000000000C40000-0x0000000000D4E000-memory.dmp

Filesize
1.1MB

Download
memory/1316-2-0x00000000056C0000-0x000000000575C000-memory.dmp

Filesize
624KB

Download
memory/3584-16-0x00007FFC72C33000-0x00007FFC72C35000-memory.dmp

Filesize
8KB

Download
memory/3584-15-0x0000000000E10000-0x0000000000EA8000-memory.dmp

Filesize
608KB

Download