bd0bf0ab2a105a60f009019c56aafdc6dafcd7a45f8ab1a585a5bc5d1625b716

Analysis

max time kernel
150s
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
19-12-2024 22:02

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General

Target

Sigma.exe
Size

839KB
MD5

50c30c48da78a5da6c3930deeab5c162
SHA1

8ce696d3f74a75f99d3c29a107d940eba35cd13f
SHA256

bd0bf0ab2a105a60f009019c56aafdc6dafcd7a45f8ab1a585a5bc5d1625b716
SHA512

60175eaf8b6a895aa9bdc38ae00d30f83855f52457b120241bba9fcd8d83f5637aee55aa9993e034c3ea4f2310426ea04d69c15835375dd3915e39169def0809
SSDEEP

24576:nmIS04YNEMuExDiU6E5R9s8xY/2l/detnIbt+rx:mQ4auS+UjfU2TedIbt+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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	Sigma.exe

Executes dropped EXE 1 IoCs

pid	Process
4932	AudioDriver.exe

Drops desktop.ini file(s) 2 IoCs

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

Drops file in Windows directory 3 IoCs

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

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4932	AudioDriver.exe
4932	AudioDriver.exe
4932	AudioDriver.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4932	AudioDriver.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4932	AudioDriver.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4932	AudioDriver.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4932	AudioDriver.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2396 wrote to memory of 4932	2396	Sigma.exe	83
PID 2396 wrote to memory of 4932	2396	Sigma.exe	83
PID 2396 wrote to memory of 4932	2396	Sigma.exe	83

C:\Users\Admin\AppData\Local\Temp\Sigma.exe
"C:\Users\Admin\AppData\Local\Temp\Sigma.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:2396
- 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
  - Suspicious use of SetWindowsHookEx
  PID:4932

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe

Filesize
839KB

MD5
50c30c48da78a5da6c3930deeab5c162

SHA1
8ce696d3f74a75f99d3c29a107d940eba35cd13f

SHA256
bd0bf0ab2a105a60f009019c56aafdc6dafcd7a45f8ab1a585a5bc5d1625b716

SHA512
60175eaf8b6a895aa9bdc38ae00d30f83855f52457b120241bba9fcd8d83f5637aee55aa9993e034c3ea4f2310426ea04d69c15835375dd3915e39169def0809

Download Submit
memory/2396-0-0x0000000074DA2000-0x0000000074DA3000-memory.dmp

Filesize
4KB

Download
memory/2396-1-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/2396-2-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/2396-20-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/4932-18-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/4932-19-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/4932-21-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/4932-24-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/4932-25-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/4932-26-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/4932-27-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download