ryuk | a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672

General

Target

a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe
Size

168KB
MD5

966251a415b5abbf2d4b9699abde3fe8
SHA1

e63c35c79badc0a6846ed33a9f30eeda66698350
SHA256

a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672
SHA512

d47b1ab889550af3bb826fefedb9164f6670269897bb02f01f970fb6e8b32d26c464fa3e0a2771257b2dd3cc5652665796c3aa5a2f326dc528fa30d89f244886

Score

10^/10

ryuk ransomware

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html

Family

ryuk

Ransom Note

<html><body><p style="font-weight:bold;font-size:125%;top:0;left:0;"> [email protected] <br> [email protected] </p><p style="position:absolute;bottom:0;right:1%;font-weight:bold;font-size:170%">balance of shadow universe</p><div style="font-size: 550%;font-weight:bold;width:50%;height:50%;overflow:auto;margin:auto;position:absolute;top:35%;left:40%;">Ryuk</div></body></html��

Emails

[email protected]

Signatures

Ryuk
Ransomware distributed via existing botnets, often Trickbot or Emotet.
ransomware ryuk
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Runs net.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe

pid	process
1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe
1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe
1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe

description pid process

Token: SeBackupPrivilege 1472 a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe

description	pid	process
Token: SeBackupPrivilege	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe

Suspicious use of WriteProcessMemory 32 IoCs

Processes:

a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exenet.exenet.exenet.exenet.exe

description	pid	process	target process
PID 1472 wrote to memory of 2636	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 1472 wrote to memory of 2636	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 1472 wrote to memory of 2636	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 1472 wrote to memory of 2636	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 1472 wrote to memory of 2764	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 1472 wrote to memory of 2764	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 1472 wrote to memory of 2764	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 1472 wrote to memory of 2764	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 2764 wrote to memory of 5612	2764	net.exe	net1.exe
PID 2764 wrote to memory of 5612	2764	net.exe	net1.exe
PID 2764 wrote to memory of 5612	2764	net.exe	net1.exe
PID 2764 wrote to memory of 5612	2764	net.exe	net1.exe
PID 2636 wrote to memory of 5604	2636	net.exe	net1.exe
PID 2636 wrote to memory of 5604	2636	net.exe	net1.exe
PID 2636 wrote to memory of 5604	2636	net.exe	net1.exe
PID 2636 wrote to memory of 5604	2636	net.exe	net1.exe
PID 1472 wrote to memory of 8768	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 1472 wrote to memory of 8768	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 1472 wrote to memory of 8768	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 1472 wrote to memory of 8768	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 8768 wrote to memory of 8792	8768	net.exe	net1.exe
PID 8768 wrote to memory of 8792	8768	net.exe	net1.exe
PID 8768 wrote to memory of 8792	8768	net.exe	net1.exe
PID 8768 wrote to memory of 8792	8768	net.exe	net1.exe
PID 1472 wrote to memory of 16788	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 1472 wrote to memory of 16788	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 1472 wrote to memory of 16788	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 1472 wrote to memory of 16788	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	net.exe
PID 16788 wrote to memory of 16812	16788	net.exe	net1.exe
PID 16788 wrote to memory of 16812	16788	net.exe	net1.exe
PID 16788 wrote to memory of 16812	16788	net.exe	net1.exe
PID 16788 wrote to memory of 16812	16788	net.exe	net1.exe

C:\Users\Admin\AppData\Local\Temp\a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe
"C:\Users\Admin\AppData\Local\Temp\a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1472

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
2⤵
- Suspicious use of WriteProcessMemory
PID:2636

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "audioendpointbuilder" /y
3⤵
PID:5604

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
2⤵
- Suspicious use of WriteProcessMemory
PID:2764

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
3⤵
PID:5612

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
2⤵
- Suspicious use of WriteProcessMemory
PID:8768

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
3⤵
PID:8792

C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
2⤵
- Suspicious use of WriteProcessMemory
PID:16788

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
3⤵
PID:16812

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1472-55-0x0000000075F81000-0x0000000075F83000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing