ryuk | 300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83

Analysis

max time kernel
187s
max time network
103s
platform
windows7_x64
resource
win7-en-20211208
submitted
20-02-2022 08:47

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General

Target

300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
Size

1.4MB
MD5

82b1966d0d47be793b1dacf5449d5dd4
SHA1

f5e64f4122242c7b4068b83eaf31ce0f0806a746
SHA256

300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83
SHA512

1986630db561bcff63186e2cf3ccef34aa6a07d5286766507e31315cb57c981055b1843489b883559973d5998e482149a4ede78bcf049d96c5352b133e58f795

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> </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]

Extracted

Path

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

Family

ryuk

Ransom Note

[email protected] balance of shadow universe Ryuk

Emails

[email protected]

Signatures

Ryuk
Ransomware distributed via existing botnets, often Trickbot or Emotet.
ransomware ryuk

Executes dropped EXE 1 IoCs

pid	Process
1036	OSTGDgD.exe

Loads dropped DLL 2 IoCs

pid	Process
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe

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 29 IoCs

pid	Process
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
1036	OSTGDgD.exe
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
1036	OSTGDgD.exe
1036	OSTGDgD.exe
1036	OSTGDgD.exe
1036	OSTGDgD.exe
1036	OSTGDgD.exe
1036	OSTGDgD.exe
1036	OSTGDgD.exe
1036	OSTGDgD.exe
1036	OSTGDgD.exe
1036	OSTGDgD.exe
1036	OSTGDgD.exe
1036	OSTGDgD.exe
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
1036	OSTGDgD.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeBackupPrivilege	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
Token: SeBackupPrivilege	1036	OSTGDgD.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 320 wrote to memory of 1036	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	28
PID 320 wrote to memory of 1036	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	28
PID 320 wrote to memory of 1036	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	28
PID 320 wrote to memory of 1036	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	28
PID 320 wrote to memory of 1792	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	30
PID 320 wrote to memory of 1792	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	30
PID 320 wrote to memory of 1792	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	30
PID 320 wrote to memory of 1792	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	30
PID 1792 wrote to memory of 1052	1792	net.exe	32
PID 1792 wrote to memory of 1052	1792	net.exe	32
PID 1792 wrote to memory of 1052	1792	net.exe	32
PID 1792 wrote to memory of 1052	1792	net.exe	32
PID 320 wrote to memory of 1120	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	33
PID 320 wrote to memory of 1120	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	33
PID 320 wrote to memory of 1120	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	33
PID 320 wrote to memory of 1120	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	33
PID 1120 wrote to memory of 2020	1120	net.exe	35
PID 1120 wrote to memory of 2020	1120	net.exe	35
PID 1120 wrote to memory of 2020	1120	net.exe	35
PID 1120 wrote to memory of 2020	1120	net.exe	35
PID 320 wrote to memory of 1224	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	36
PID 320 wrote to memory of 1224	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	36
PID 320 wrote to memory of 1224	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	36
PID 320 wrote to memory of 1224	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	36
PID 1224 wrote to memory of 852	1224	net.exe	38
PID 1224 wrote to memory of 852	1224	net.exe	38
PID 1224 wrote to memory of 852	1224	net.exe	38
PID 1224 wrote to memory of 852	1224	net.exe	38
PID 320 wrote to memory of 1100	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	39
PID 320 wrote to memory of 1100	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	39
PID 320 wrote to memory of 1100	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	39
PID 320 wrote to memory of 1100	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	39
PID 1100 wrote to memory of 1184	1100	net.exe	41
PID 1100 wrote to memory of 1184	1100	net.exe	41
PID 1100 wrote to memory of 1184	1100	net.exe	41
PID 1100 wrote to memory of 1184	1100	net.exe	41
PID 1036 wrote to memory of 8536	1036	OSTGDgD.exe	42
PID 1036 wrote to memory of 8536	1036	OSTGDgD.exe	42
PID 1036 wrote to memory of 8536	1036	OSTGDgD.exe	42
PID 1036 wrote to memory of 8536	1036	OSTGDgD.exe	42
PID 8536 wrote to memory of 8560	8536	net.exe	44
PID 8536 wrote to memory of 8560	8536	net.exe	44
PID 8536 wrote to memory of 8560	8536	net.exe	44
PID 8536 wrote to memory of 8560	8536	net.exe	44
PID 320 wrote to memory of 19632	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	46
PID 320 wrote to memory of 19632	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	46
PID 320 wrote to memory of 19632	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	46
PID 320 wrote to memory of 19632	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	46
PID 19632 wrote to memory of 19656	19632	net.exe	48
PID 19632 wrote to memory of 19656	19632	net.exe	48
PID 19632 wrote to memory of 19656	19632	net.exe	48
PID 19632 wrote to memory of 19656	19632	net.exe	48
PID 320 wrote to memory of 20804	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	50
PID 320 wrote to memory of 20804	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	50
PID 320 wrote to memory of 20804	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	50
PID 320 wrote to memory of 20804	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	50
PID 20804 wrote to memory of 23672	20804	net.exe	51
PID 20804 wrote to memory of 23672	20804	net.exe	51
PID 20804 wrote to memory of 23672	20804	net.exe	51
PID 20804 wrote to memory of 23672	20804	net.exe	51
PID 320 wrote to memory of 19664	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	52
PID 320 wrote to memory of 19664	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	52
PID 320 wrote to memory of 19664	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	52
PID 320 wrote to memory of 19664	320	300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe	52

C:\Users\Admin\AppData\Local\Temp\300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe
"C:\Users\Admin\AppData\Local\Temp\300925b3c2c78e204cef2778dad5e605bc46e04c567f56d9294a596acb2b3d83.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:320
- C:\Users\Admin\AppData\Local\Temp\OSTGDgD.exe
  "C:\Users\Admin\AppData\Local\Temp\OSTGDgD.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1036
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:8536
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:8560
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    PID:44972
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:44996
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1792
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:1052
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1120
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:2020
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1224
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:852
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1100
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:1184
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:19632
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:19656
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:20804
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:23672
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:19664
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:628
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:1632
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:19664

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

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Downloads

memory/320-54-0x00000000766D1000-0x00000000766D3000-memory.dmp

Filesize
8KB

Download