c9cad5e9456b15ba20ba8e45ea72a75c5496928d9cb5614482c43979d0882459

General

Target

sigmarizzler.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

Processes:

sigmarizzler.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	sigmarizzler.exe

Executes dropped EXE 1 IoCs

Processes:

AudioDriver.exe

pid	Process
1884	AudioDriver.exe

Drops desktop.ini file(s) 2 IoCs

Processes:

sigmarizzler.exe

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

Drops file in Windows directory 3 IoCs

Processes:

sigmarizzler.exe

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

Processes:

sigmarizzler.exeAudioDriver.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sigmarizzler.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AudioDriver.exe

Suspicious behavior: EnumeratesProcesses 36 IoCs

Processes:

AudioDriver.exe

pid	Process
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe
1884	AudioDriver.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

AudioDriver.exe

description	pid	Process
Token: SeDebugPrivilege	1884	AudioDriver.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

AudioDriver.exe

pid	Process
1884	AudioDriver.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

AudioDriver.exe

pid	Process
1884	AudioDriver.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

sigmarizzler.exe

description	pid	Process	procid_target
PID 3484 wrote to memory of 1884	3484	sigmarizzler.exe	82
PID 3484 wrote to memory of 1884	3484	sigmarizzler.exe	82
PID 3484 wrote to memory of 1884	3484	sigmarizzler.exe	82

C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe
"C:\Users\Admin\AppData\Local\Temp\sigmarizzler.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:3484
- 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:1884

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

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/1884-18-0x00000000752B0000-0x0000000075861000-memory.dmp

Filesize
5.7MB

Download
memory/1884-20-0x00000000752B0000-0x0000000075861000-memory.dmp

Filesize
5.7MB

Download
memory/1884-21-0x00000000752B0000-0x0000000075861000-memory.dmp

Filesize
5.7MB

Download
memory/1884-22-0x00000000752B0000-0x0000000075861000-memory.dmp

Filesize
5.7MB

Download
memory/3484-0-0x00000000752B2000-0x00000000752B3000-memory.dmp

Filesize
4KB

Download
memory/3484-1-0x00000000752B0000-0x0000000075861000-memory.dmp

Filesize
5.7MB

Download
memory/3484-2-0x00000000752B0000-0x0000000075861000-memory.dmp

Filesize
5.7MB

Download
memory/3484-19-0x00000000752B0000-0x0000000075861000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads