umbral | aa37a91d02342e352c232f16f028fee2148794db8306d71888949c18e194f4e0

Resubmissions

01/02/2025, 15:10

250201-skb6qsxmey 10

01/02/2025, 15:07

250201-shlmdszjdk 3

Analysis

max time kernel
43s
max time network
30s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
01/02/2025, 15:10

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General

Target

visa chker (2).exe
Size

352KB
MD5

16f434baf75d91420e232e8ba8ca1b2a
SHA1

050485704f51dc24b8c36da438ef9af6cc8b8ea5
SHA256

aa37a91d02342e352c232f16f028fee2148794db8306d71888949c18e194f4e0
SHA512

d1ba40fe0a243653aeb765720aae32d1e5b6926f60ec2818723cc38edfd0be16c9c44c8c9e1e4aa6dd695d30d3b704d33010d2c40a7266f912590441d86c9e32
SSDEEP

6144:cdRVzSkGTxSLD8uq5CaOPs47bhqUdh8SfkSE6GoE6Jrtqaw9/0G5:chqxSLo5C1Ps4Xhf8S8SRdvqawp0G5

Score

10^/10

umbral discovery stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1335250212557553664/Oms0E9sA-BluxlQ8a6nVRKSu9r0-8RrnXNd784nPqqAqA4oT0r-8bktBBJO1h9UNPvm-

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/files/0x00090000000120fe-3.dat	family_umbral

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

System Location Discovery: System Language Discovery 1 TTPs 5 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	visa chker (2).exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	visa chker (2).exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	visa chker (2).exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	visa chker (2).exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	visa chker (2).exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: 33	2944	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	2944	AUDIODG.EXE
Token: 33	2944	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	2944	AUDIODG.EXE

C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe
"C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2308

C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe
"C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2796

C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe
"C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2952

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:2924

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x508
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2944

C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe
"C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2176

C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe
"C:\Users\Admin\AppData\Local\Temp\visa chker (2).exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2648

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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\visa chker.exe

Filesize
229KB

MD5
c9e39a6033e4a4399063b8d15e57800e

SHA1
28fda7d8cfec95943fff27c4fda45da97318bb67

SHA256
94a4bb3d59972839fc26214ae5aeb004c88cf899e44eca49e460cc43f28d0dc2

SHA512
0b37422b8b4233206d559f584695d8135b325eb31d78ac97ee674ddc33494c72010170500ce39a1467b8acfb8289f68b059460a4f99ca913cdbee20430867f06

Download Submit
memory/2308-2-0x0000000000CE0000-0x0000000000CE1000-memory.dmp

Filesize
4KB

Download