676fdc85814c991074766a302aca8f6ffbd3e35f6564b841cb712010ccd8d816

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09-01-2025 16:35

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General

Target

Sigmaalpha.exe
Size

839KB
MD5

6f93bf5bd25cf58c2756121371d1bb3f
SHA1

d7fdff4e6c355add9a58bf54d66d420c97f8a9a9
SHA256

676fdc85814c991074766a302aca8f6ffbd3e35f6564b841cb712010ccd8d816
SHA512

2def16daf5c7bfe838d4a9438554df2d07fd8d93c0d090e0d099b95a19e9f8b2aba3b810f845a4b90640856d6db0343c0335ef5eb288dc62ed4f22f806678e8e
SSDEEP

24576:mBS04YNEMuExDiU6E5R9s8xY/2l/dGtnIbt+rn:mj4auS+UjfU2TGdIbt+r

Score

7^/10

discovery

Malware Config

Signatures

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	Sigmaalpha.exe

Executes dropped EXE 1 IoCs

pid	Process
1148	AudioDriver.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	Sigmaalpha.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	Sigmaalpha.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	Sigmaalpha.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	Sigmaalpha.exe
File opened for modification	C:\Windows\assembly	Sigmaalpha.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	Sigmaalpha.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AudioDriver.exe

Suspicious behavior: EnumeratesProcesses 36 IoCs

pid	Process
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe
1148	AudioDriver.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1148	AudioDriver.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1148	AudioDriver.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1148	AudioDriver.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4944 wrote to memory of 1148	4944	Sigmaalpha.exe	83
PID 4944 wrote to memory of 1148	4944	Sigmaalpha.exe	83
PID 4944 wrote to memory of 1148	4944	Sigmaalpha.exe	83

C:\Users\Admin\AppData\Local\Temp\Sigmaalpha.exe
"C:\Users\Admin\AppData\Local\Temp\Sigmaalpha.exe"
1⤵
- Checks computer location settings
- Drops desktop.ini file(s)
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4944
- C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:1148

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\Microsoft\Speech\AudioDriver.exe

Filesize
839KB

MD5
6f93bf5bd25cf58c2756121371d1bb3f

SHA1
d7fdff4e6c355add9a58bf54d66d420c97f8a9a9

SHA256
676fdc85814c991074766a302aca8f6ffbd3e35f6564b841cb712010ccd8d816

SHA512
2def16daf5c7bfe838d4a9438554df2d07fd8d93c0d090e0d099b95a19e9f8b2aba3b810f845a4b90640856d6db0343c0335ef5eb288dc62ed4f22f806678e8e

Download Submit
memory/1148-19-0x0000000075080000-0x0000000075631000-memory.dmp

Filesize
5.7MB

Download
memory/1148-20-0x0000000075080000-0x0000000075631000-memory.dmp

Filesize
5.7MB

Download
memory/1148-21-0x0000000075080000-0x0000000075631000-memory.dmp

Filesize
5.7MB

Download
memory/4944-0-0x0000000075082000-0x0000000075083000-memory.dmp

Filesize
4KB

Download
memory/4944-1-0x0000000075080000-0x0000000075631000-memory.dmp

Filesize
5.7MB

Download
memory/4944-2-0x0000000075080000-0x0000000075631000-memory.dmp

Filesize
5.7MB

Download
memory/4944-18-0x0000000075080000-0x0000000075631000-memory.dmp

Filesize
5.7MB

Download