c85fec6ed44bdfd54c5f37190ffad38919640064ce718045e228dca65f74ec7b

Analysis

max time kernel
8s
max time network
17s
platform
windows10-2004_x64
resource
win10v2004-20231020-en
resource tags

arch:x64arch:x86image:win10v2004-20231020-enlocale:en-usos:windows10-2004-x64system
submitted
09-11-2023 12:49

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General

Target

RYUK RANSOMWARE.exe
Size

205KB
MD5

881db1945686533f06f6626da444a7b5
SHA1

776fff17a531a374d13a9e267db764e3463a4cfc
SHA256

c85fec6ed44bdfd54c5f37190ffad38919640064ce718045e228dca65f74ec7b
SHA512

639d684ab5a15a23355577d0c0e6cab29fe66596af5c5644a4fb258c3f65324c94f4c5fc4f76c7b7ac2ff0f15ffc69e98c279f59e8897e3db4e3ffaee2e96af6
SSDEEP

3072:30imLeE+6Kiei4VrJo6lxPJUVjIMaNhUv:LE+6Kt53oExlNh

Score

7^/10

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:

RYUK RANSOMWARE.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1873812795-1433807462-1429862679-1000\Control Panel\International\Geo\Nation	RYUK RANSOMWARE.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Runs net.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

RYUK RANSOMWARE.exe

pid process

1096 RYUK RANSOMWARE.exe
1096 RYUK RANSOMWARE.exe
1096 RYUK RANSOMWARE.exe
1096 RYUK RANSOMWARE.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RYUK RANSOMWARE.exe

description pid process

Token: SeDebugPrivilege 1096 RYUK RANSOMWARE.exe

pid	process
1096	RYUK RANSOMWARE.exe
1096	RYUK RANSOMWARE.exe
1096	RYUK RANSOMWARE.exe
1096	RYUK RANSOMWARE.exe

description	pid	process
Token: SeDebugPrivilege	1096	RYUK RANSOMWARE.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

RYUK RANSOMWARE.exenet.exenet.exe

description	pid	process	target process
PID 1096 wrote to memory of 2412	1096	RYUK RANSOMWARE.exe	sihost.exe
PID 1096 wrote to memory of 3736	1096	RYUK RANSOMWARE.exe	net.exe
PID 1096 wrote to memory of 3736	1096	RYUK RANSOMWARE.exe	net.exe
PID 1096 wrote to memory of 4020	1096	RYUK RANSOMWARE.exe	net.exe
PID 1096 wrote to memory of 4020	1096	RYUK RANSOMWARE.exe	net.exe
PID 3736 wrote to memory of 1644	3736	net.exe	net1.exe
PID 3736 wrote to memory of 1644	3736	net.exe	net1.exe
PID 1096 wrote to memory of 2424	1096	RYUK RANSOMWARE.exe	svchost.exe
PID 4020 wrote to memory of 4724	4020	net.exe	net1.exe
PID 4020 wrote to memory of 4724	4020	net.exe	net1.exe
PID 1096 wrote to memory of 2524	1096	RYUK RANSOMWARE.exe	taskhostw.exe
PID 1096 wrote to memory of 3484	1096	RYUK RANSOMWARE.exe	svchost.exe
PID 1096 wrote to memory of 3728	1096	RYUK RANSOMWARE.exe	DllHost.exe

C:\Windows\system32\taskhostw.exe
taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
1⤵
PID:2524

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
1⤵
PID:3484

C:\Windows\system32\DllHost.exe
C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
1⤵
PID:3728

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
1⤵
PID:2424

C:\Windows\system32\sihost.exe
sihost.exe
1⤵
PID:2412

C:\Users\Admin\AppData\Local\Temp\RYUK RANSOMWARE.exe
"C:\Users\Admin\AppData\Local\Temp\RYUK RANSOMWARE.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1096
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3736
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:1644
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4020
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:4724

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2412-0-0x00007FF787C10000-0x00007FF787EEA000-memory.dmp

Filesize
2.9MB

Download
memory/2412-1-0x00007FF787C10000-0x00007FF787EEA000-memory.dmp

Filesize
2.9MB

Download