cc9879ba8143f1ee15fd5400ea6632da1337970111467c362d7f0695c71d04d2

Analysis

max time kernel
93s
max time network
139s
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 19:50

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General

Target

Sigma.exe
Size

839KB
MD5

d82971472daf0f83934006c25abb88f4
SHA1

85178be08ca3583d530a87ea789e9ae4a9490c17
SHA256

cc9879ba8143f1ee15fd5400ea6632da1337970111467c362d7f0695c71d04d2
SHA512

a4210167fc7c02508e708ee12bd52876413425046496fdeccd2a0313cf1260f651411a35cc2a6e5b65a30f5542aae75f1d1741d616ff79f93a48d9669e61e42f
SSDEEP

24576:bBS04YNEMuExDiU6E5R9s8xY/2l/dGtnIbt+r7:bj4auS+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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	Sigma.exe

Executes dropped EXE 1 IoCs

pid	Process
1192	AudioDriver.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	Sigma.exe
File opened for modification	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
1192	AudioDriver.exe
1192	AudioDriver.exe
1192	AudioDriver.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1192	AudioDriver.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1192	AudioDriver.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1192	AudioDriver.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2624 wrote to memory of 1192	2624	Sigma.exe	82
PID 2624 wrote to memory of 1192	2624	Sigma.exe	82
PID 2624 wrote to memory of 1192	2624	Sigma.exe	82

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:2624
- 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:1192

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
d82971472daf0f83934006c25abb88f4

SHA1
85178be08ca3583d530a87ea789e9ae4a9490c17

SHA256
cc9879ba8143f1ee15fd5400ea6632da1337970111467c362d7f0695c71d04d2

SHA512
a4210167fc7c02508e708ee12bd52876413425046496fdeccd2a0313cf1260f651411a35cc2a6e5b65a30f5542aae75f1d1741d616ff79f93a48d9669e61e42f

Download Submit
memory/1192-18-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/1192-20-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/1192-23-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/1192-24-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/1192-25-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/1192-26-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/1192-28-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/2624-0-0x0000000074DA2000-0x0000000074DA3000-memory.dmp

Filesize
4KB

Download
memory/2624-1-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/2624-2-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/2624-19-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download