ryuk | 81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013

Analysis

max time kernel
201s
max time network
98s
platform
windows7_x64
resource
win7-en-20211208
submitted
20-02-2022 05:11

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
Size

192KB
MD5

567cf2eec7a754e6ac98f0f738418caa
SHA1

70a1b782865156a338894e9466f951143927703f
SHA256

81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013
SHA512

867b233c1a83ec8c46479b30e3dc37f5c306d33ec2804622e43be7cc9f45afa4a2873e4eff72f36353db68a3c12281dd11f2030b36b421fef145aa71136a0b88

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]

Extracted

Path

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

Family

ryuk

Ransom Note

[email protected] [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
1120	ynDiTTz.exe

Loads dropped DLL 6 IoCs

pid	Process
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
15488	1120	WerFault.exe	29

Runs net.exe

Suspicious behavior: EnumeratesProcesses 38 IoCs

pid	Process
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
1120	ynDiTTz.exe
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
1120	ynDiTTz.exe
1120	ynDiTTz.exe
1120	ynDiTTz.exe
1120	ynDiTTz.exe
1120	ynDiTTz.exe
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
1120	ynDiTTz.exe
672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe
15488	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	1120	ynDiTTz.exe
Token: SeBackupPrivilege	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
Token: SeDebugPrivilege	15488	WerFault.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 672 wrote to memory of 1120	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	29
PID 672 wrote to memory of 1120	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	29
PID 672 wrote to memory of 1120	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	29
PID 672 wrote to memory of 1120	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	29
PID 672 wrote to memory of 1072	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	30
PID 672 wrote to memory of 1072	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	30
PID 672 wrote to memory of 1072	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	30
PID 672 wrote to memory of 1072	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	30
PID 1072 wrote to memory of 1864	1072	net.exe	32
PID 1072 wrote to memory of 1864	1072	net.exe	32
PID 1072 wrote to memory of 1864	1072	net.exe	32
PID 1072 wrote to memory of 1864	1072	net.exe	32
PID 672 wrote to memory of 1056	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	33
PID 672 wrote to memory of 1056	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	33
PID 672 wrote to memory of 1056	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	33
PID 672 wrote to memory of 1056	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	33
PID 1056 wrote to memory of 1552	1056	net.exe	35
PID 1056 wrote to memory of 1552	1056	net.exe	35
PID 1056 wrote to memory of 1552	1056	net.exe	35
PID 1056 wrote to memory of 1552	1056	net.exe	35
PID 1120 wrote to memory of 1512	1120	ynDiTTz.exe	36
PID 1120 wrote to memory of 1512	1120	ynDiTTz.exe	36
PID 1120 wrote to memory of 1512	1120	ynDiTTz.exe	36
PID 1120 wrote to memory of 1512	1120	ynDiTTz.exe	36
PID 1512 wrote to memory of 1164	1512	net.exe	38
PID 1512 wrote to memory of 1164	1512	net.exe	38
PID 1512 wrote to memory of 1164	1512	net.exe	38
PID 1512 wrote to memory of 1164	1512	net.exe	38
PID 1120 wrote to memory of 1860	1120	ynDiTTz.exe	39
PID 1120 wrote to memory of 1860	1120	ynDiTTz.exe	39
PID 1120 wrote to memory of 1860	1120	ynDiTTz.exe	39
PID 1120 wrote to memory of 1860	1120	ynDiTTz.exe	39
PID 672 wrote to memory of 1920	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	40
PID 672 wrote to memory of 1920	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	40
PID 672 wrote to memory of 1920	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	40
PID 672 wrote to memory of 1920	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	40
PID 1920 wrote to memory of 1532	1920	net.exe	43
PID 1920 wrote to memory of 1532	1920	net.exe	43
PID 1920 wrote to memory of 1532	1920	net.exe	43
PID 1920 wrote to memory of 1532	1920	net.exe	43
PID 1860 wrote to memory of 1276	1860	net.exe	44
PID 1860 wrote to memory of 1276	1860	net.exe	44
PID 1860 wrote to memory of 1276	1860	net.exe	44
PID 1860 wrote to memory of 1276	1860	net.exe	44
PID 672 wrote to memory of 8544	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	45
PID 672 wrote to memory of 8544	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	45
PID 672 wrote to memory of 8544	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	45
PID 672 wrote to memory of 8544	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	45
PID 8544 wrote to memory of 8568	8544	net.exe	47
PID 8544 wrote to memory of 8568	8544	net.exe	47
PID 8544 wrote to memory of 8568	8544	net.exe	47
PID 8544 wrote to memory of 8568	8544	net.exe	47
PID 1120 wrote to memory of 12324	1120	ynDiTTz.exe	48
PID 1120 wrote to memory of 12324	1120	ynDiTTz.exe	48
PID 1120 wrote to memory of 12324	1120	ynDiTTz.exe	48
PID 1120 wrote to memory of 12324	1120	ynDiTTz.exe	48
PID 672 wrote to memory of 13436	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	50
PID 672 wrote to memory of 13436	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	50
PID 672 wrote to memory of 13436	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	50
PID 672 wrote to memory of 13436	672	81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe	50
PID 12324 wrote to memory of 13912	12324	net.exe	52
PID 12324 wrote to memory of 13912	12324	net.exe	52
PID 12324 wrote to memory of 13912	12324	net.exe	52
PID 12324 wrote to memory of 13912	12324	net.exe	52

C:\Users\Admin\AppData\Local\Temp\81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe
"C:\Users\Admin\AppData\Local\Temp\81c4866813a273f4c5e859f241ec28c973c974651a948553c6439bcd0a571013.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:672
- C:\Users\Admin\AppData\Local\Temp\ynDiTTz.exe
  "C:\Users\Admin\AppData\Local\Temp\ynDiTTz.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1120
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1512
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "audioendpointbuilder" /y
      4⤵
      PID:1164
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1860
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:1276
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:12324
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:13912
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1120 -s 12828
    3⤵
    - Loads dropped DLL
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:15488
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1072
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:1864
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1056
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:1552
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1920
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:1532
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:8544
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:8568
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:13436
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:14152
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:15632
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:15656
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:15692
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:15736

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/672-54-0x0000000074F01000-0x0000000074F03000-memory.dmp

Filesize
8KB

Download
memory/1120-62-0x00000000026C0000-0x00000000026D4000-memory.dmp

Filesize
80KB

Download
memory/1120-65-0x0000000002720000-0x000000000272B000-memory.dmp

Filesize
44KB

Download
memory/1120-61-0x0000000002690000-0x00000000026B9000-memory.dmp

Filesize
164KB

Download
memory/15488-71-0x00000000006F0000-0x00000000006F1000-memory.dmp

Filesize
4KB

Download