227befcbc16bcd69e4f1b9b634492eba0c952e06b9ed94b199edce3804b84f51

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-12-2024 23:39

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General

Target

Sigmaboy.exe
Size

839KB
MD5

5ff4807e24e3435c8e2d88be60086109
SHA1

3724453097aa75f412094aa9d72d53be07e99ef6
SHA256

227befcbc16bcd69e4f1b9b634492eba0c952e06b9ed94b199edce3804b84f51
SHA512

0f4a80c5e26b87bb5223d509111c9401ce763fd4f5bfb845ef8cbfde1bfbe0e71c33bc594b4a842948fca731b02a106e138eaec017505bab6b8a454303d71032
SSDEEP

24576:BpS04YNEMuExDiU6E5R9s8xY/2l/dmtnIbt+rP:BL4auS+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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	Sigmaboy.exe

Executes dropped EXE 1 IoCs

pid	Process
2556	AudioDriver.exe

Drops desktop.ini file(s) 2 IoCs

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

Drops file in Windows directory 3 IoCs

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

Suspicious behavior: EnumeratesProcesses 36 IoCs

pid	Process
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe
2556	AudioDriver.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2556	AudioDriver.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2556	AudioDriver.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2556	AudioDriver.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2556	AudioDriver.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3208 wrote to memory of 2556	3208	Sigmaboy.exe	82
PID 3208 wrote to memory of 2556	3208	Sigmaboy.exe	82
PID 3208 wrote to memory of 2556	3208	Sigmaboy.exe	82

C:\Users\Admin\AppData\Local\Temp\Sigmaboy.exe
"C:\Users\Admin\AppData\Local\Temp\Sigmaboy.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:3208
- 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:2556

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
5ff4807e24e3435c8e2d88be60086109

SHA1
3724453097aa75f412094aa9d72d53be07e99ef6

SHA256
227befcbc16bcd69e4f1b9b634492eba0c952e06b9ed94b199edce3804b84f51

SHA512
0f4a80c5e26b87bb5223d509111c9401ce763fd4f5bfb845ef8cbfde1bfbe0e71c33bc594b4a842948fca731b02a106e138eaec017505bab6b8a454303d71032

Download Submit
memory/2556-20-0x0000000075370000-0x0000000075921000-memory.dmp

Filesize
5.7MB

Download
memory/2556-19-0x0000000075370000-0x0000000075921000-memory.dmp

Filesize
5.7MB

Download
memory/2556-21-0x0000000075370000-0x0000000075921000-memory.dmp

Filesize
5.7MB

Download
memory/2556-22-0x0000000075370000-0x0000000075921000-memory.dmp

Filesize
5.7MB

Download
memory/3208-0-0x0000000075372000-0x0000000075373000-memory.dmp

Filesize
4KB

Download
memory/3208-1-0x0000000075370000-0x0000000075921000-memory.dmp

Filesize
5.7MB

Download
memory/3208-2-0x0000000075370000-0x0000000075921000-memory.dmp

Filesize
5.7MB

Download
memory/3208-18-0x0000000075370000-0x0000000075921000-memory.dmp

Filesize
5.7MB

Download