ryuk | a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672

Analysis

max time kernel
170s
max time network
144s
platform
windows7_x64
resource
win7-en-20211208
submitted
20-02-2022 03:32

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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

pid	Process
1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe
1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe
1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeBackupPrivilege	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 1472 wrote to memory of 2636	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	28
PID 1472 wrote to memory of 2636	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	28
PID 1472 wrote to memory of 2636	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	28
PID 1472 wrote to memory of 2636	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	28
PID 1472 wrote to memory of 2764	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	30
PID 1472 wrote to memory of 2764	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	30
PID 1472 wrote to memory of 2764	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	30
PID 1472 wrote to memory of 2764	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	30
PID 2764 wrote to memory of 5612	2764	net.exe	34
PID 2764 wrote to memory of 5612	2764	net.exe	34
PID 2764 wrote to memory of 5612	2764	net.exe	34
PID 2764 wrote to memory of 5612	2764	net.exe	34
PID 2636 wrote to memory of 5604	2636	net.exe	33
PID 2636 wrote to memory of 5604	2636	net.exe	33
PID 2636 wrote to memory of 5604	2636	net.exe	33
PID 2636 wrote to memory of 5604	2636	net.exe	33
PID 1472 wrote to memory of 8768	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	35
PID 1472 wrote to memory of 8768	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	35
PID 1472 wrote to memory of 8768	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	35
PID 1472 wrote to memory of 8768	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	35
PID 8768 wrote to memory of 8792	8768	net.exe	37
PID 8768 wrote to memory of 8792	8768	net.exe	37
PID 8768 wrote to memory of 8792	8768	net.exe	37
PID 8768 wrote to memory of 8792	8768	net.exe	37
PID 1472 wrote to memory of 16788	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	39
PID 1472 wrote to memory of 16788	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	39
PID 1472 wrote to memory of 16788	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	39
PID 1472 wrote to memory of 16788	1472	a90285e58fd49c1ae1cbf50f7f37438b12aa08b61e52a1f612e6cf9863d18672.exe	39
PID 16788 wrote to memory of 16812	16788	net.exe	41
PID 16788 wrote to memory of 16812	16788	net.exe	41
PID 16788 wrote to memory of 16812	16788	net.exe	41
PID 16788 wrote to memory of 16812	16788	net.exe	41

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

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
8KB

Download