umbral | 1a2d5e69f1dbd608bb2630f7c8ae2a07dc2fe5cdec2376319937bf7f62d468a4

Analysis

max time kernel
95s
max time network
99s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
08-11-2024 19:13

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General

Target

1a2d5e69f1dbd608bb2630f7c8ae2a07dc2fe5cdec2376319937bf7f62d468a4N.exe
Size

5.3MB
MD5

dc21bdd709b0043081f9d593c5eb0950
SHA1

82b88aef7c24f5e4fb94d9cd619b2cf02d49482d
SHA256

1a2d5e69f1dbd608bb2630f7c8ae2a07dc2fe5cdec2376319937bf7f62d468a4
SHA512

b9d0ef3eb6611dc7b7649996da3da0ffcfc7c00af6735342d793acae766b0108ed815fb4d72ae98208e542dc3d704e1c2c3d9f384e3226559becc65ad7a4c5d5
SSDEEP

98304:xivmGMDlsrwXdxIjBy6e5UZpqk8PEYw53:xvGMBpXdxIjByj5QpqfJQ

Score

10^/10

umbral discovery stealer

Malware Config

Extracted

Family

umbral

https://discordapp.com/api/webhooks/1230529358272135229/UudHK5Ehya0aeui-YfuJN2oPhTPDyLENI0eay6qqi0U07DuiN2SxVvdUuelb3b1HDkUr

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral2/memory/3664-0-0x0000000000400000-0x000000000094B000-memory.dmp	family_umbral
behavioral2/files/0x000a000000023b5a-5.dat	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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	1a2d5e69f1dbd608bb2630f7c8ae2a07dc2fe5cdec2376319937bf7f62d468a4N.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 2 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	1a2d5e69f1dbd608bb2630f7c8ae2a07dc2fe5cdec2376319937bf7f62d468a4N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000_Classes\Local Settings	1a2d5e69f1dbd608bb2630f7c8ae2a07dc2fe5cdec2376319937bf7f62d468a4N.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3664 wrote to memory of 2904	3664	1a2d5e69f1dbd608bb2630f7c8ae2a07dc2fe5cdec2376319937bf7f62d468a4N.exe	86
PID 3664 wrote to memory of 2904	3664	1a2d5e69f1dbd608bb2630f7c8ae2a07dc2fe5cdec2376319937bf7f62d468a4N.exe	86
PID 3664 wrote to memory of 2904	3664	1a2d5e69f1dbd608bb2630f7c8ae2a07dc2fe5cdec2376319937bf7f62d468a4N.exe	86

C:\Users\Admin\AppData\Local\Temp\1a2d5e69f1dbd608bb2630f7c8ae2a07dc2fe5cdec2376319937bf7f62d468a4N.exe
"C:\Users\Admin\AppData\Local\Temp\1a2d5e69f1dbd608bb2630f7c8ae2a07dc2fe5cdec2376319937bf7f62d468a4N.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3664
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Roaming\system32.bat"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2904

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\Roaming\system32.bat

Filesize
232KB

MD5
64e68e6eb69b728a33957ccccd37f125

SHA1
0b1122c3e4229cd2afbb689f61a0c38f5aa263c1

SHA256
c0df4d996be096ab63a744c8949064892db05ca3edc53474a6d872c37731b285

SHA512
646382f12296771a5630e7d7f02f99ab43d77b44335b906ee0a1c5c700790863fd2626e186f877aecf9fc681fdc72177b427794f3bca8083b975bb328144c963

Download Submit
memory/3664-0-0x0000000000400000-0x000000000094B000-memory.dmp

Filesize
5.3MB

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