c9cad5e9456b15ba20ba8e45ea72a75c5496928d9cb5614482c43979d0882459

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
26-11-2024 19:00

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General

Target

sigma rizzler.exe
Size

839KB
MD5

40c7a4426aedab088a4704c699caf3a4
SHA1

558dcd92d48d4827d9ae252f5cccc5377cb78efd
SHA256

c9cad5e9456b15ba20ba8e45ea72a75c5496928d9cb5614482c43979d0882459
SHA512

c5bfca766cbd7858798fc9f14f1a16789f64864ba380c7a61b830812753da92ff2463dd0a22f054a85c4166a96a0068286dee2bb640bf24c9572a2b6d3d48218
SSDEEP

24576:DpS04YNEMuExDiU6E5R9s8xY/2l/dmtnIbt+rp:DL4auS+UjfU2TmdIbt+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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	sigma rizzler.exe

Executes dropped EXE 1 IoCs

pid	Process
4840	AudioDriver.exe

Drops desktop.ini file(s) 2 IoCs

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

Drops file in Windows directory 3 IoCs

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

Suspicious behavior: EnumeratesProcesses 36 IoCs

pid	Process
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe
4840	AudioDriver.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4840	AudioDriver.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4840	AudioDriver.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4840	AudioDriver.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3996 wrote to memory of 4840	3996	sigma rizzler.exe	82
PID 3996 wrote to memory of 4840	3996	sigma rizzler.exe	82
PID 3996 wrote to memory of 4840	3996	sigma rizzler.exe	82

C:\Users\Admin\AppData\Local\Temp\sigma rizzler.exe
"C:\Users\Admin\AppData\Local\Temp\sigma rizzler.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:3996
- 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:4840

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
40c7a4426aedab088a4704c699caf3a4

SHA1
558dcd92d48d4827d9ae252f5cccc5377cb78efd

SHA256
c9cad5e9456b15ba20ba8e45ea72a75c5496928d9cb5614482c43979d0882459

SHA512
c5bfca766cbd7858798fc9f14f1a16789f64864ba380c7a61b830812753da92ff2463dd0a22f054a85c4166a96a0068286dee2bb640bf24c9572a2b6d3d48218

Download Submit
memory/3996-0-0x0000000074C62000-0x0000000074C63000-memory.dmp

Filesize
4KB

Download
memory/3996-1-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/3996-2-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/3996-19-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/4840-18-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/4840-20-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/4840-21-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download