ryuk | 683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb

Analysis

max time kernel
173s
max time network
144s
platform
windows7_x64
resource
win7-en-20211208
submitted
20-02-2022 06:20

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General

Target

683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
Size

190KB
MD5

65865d94596a90b7e6204deb1de53c3d
SHA1

282e3776f86d3b0b2916ed6047ad272fe2f0cf6e
SHA256

683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb
SHA512

3c148f68856bf284f1775eb67a47ba880d4f69f8d6180a436a860484935c05d95ba5a3ff13e9c4280bb553f49e4f818ffce6e0a6016323d836cabe69bf8be7f5

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
760	zXWyTgQ.exe

Loads dropped DLL 2 IoCs

pid	Process
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe

Enumerates connected drives 3 TTPs 2 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\a:	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
File opened (read-only)	\??\A:	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.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 39 IoCs

pid	Process
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
760	zXWyTgQ.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
760	zXWyTgQ.exe
760	zXWyTgQ.exe
760	zXWyTgQ.exe
760	zXWyTgQ.exe
760	zXWyTgQ.exe
760	zXWyTgQ.exe
760	zXWyTgQ.exe
760	zXWyTgQ.exe
760	zXWyTgQ.exe
760	zXWyTgQ.exe
760	zXWyTgQ.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
760	zXWyTgQ.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeBackupPrivilege	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
Token: SeBackupPrivilege	760	zXWyTgQ.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 760	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	27
PID 1672 wrote to memory of 760	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	27
PID 1672 wrote to memory of 760	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	27
PID 1672 wrote to memory of 760	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	27
PID 1672 wrote to memory of 1992	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	28
PID 1672 wrote to memory of 1992	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	28
PID 1672 wrote to memory of 1992	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	28
PID 1672 wrote to memory of 1992	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	28
PID 760 wrote to memory of 596	760	zXWyTgQ.exe	30
PID 760 wrote to memory of 596	760	zXWyTgQ.exe	30
PID 760 wrote to memory of 596	760	zXWyTgQ.exe	30
PID 760 wrote to memory of 596	760	zXWyTgQ.exe	30
PID 1672 wrote to memory of 1084	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	32
PID 1672 wrote to memory of 1084	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	32
PID 1672 wrote to memory of 1084	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	32
PID 1672 wrote to memory of 1084	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	32
PID 760 wrote to memory of 2000	760	zXWyTgQ.exe	34
PID 760 wrote to memory of 2000	760	zXWyTgQ.exe	34
PID 760 wrote to memory of 2000	760	zXWyTgQ.exe	34
PID 760 wrote to memory of 2000	760	zXWyTgQ.exe	34
PID 1672 wrote to memory of 1600	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	36
PID 1672 wrote to memory of 1600	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	36
PID 1672 wrote to memory of 1600	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	36
PID 1672 wrote to memory of 1600	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	36
PID 1672 wrote to memory of 996	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	38
PID 1672 wrote to memory of 996	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	38
PID 1672 wrote to memory of 996	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	38
PID 1672 wrote to memory of 996	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	38
PID 2000 wrote to memory of 2156	2000	net.exe	42
PID 2000 wrote to memory of 2156	2000	net.exe	42
PID 2000 wrote to memory of 2156	2000	net.exe	42
PID 2000 wrote to memory of 2156	2000	net.exe	42
PID 1600 wrote to memory of 2244	1600	net.exe	45
PID 1600 wrote to memory of 2244	1600	net.exe	45
PID 1600 wrote to memory of 2244	1600	net.exe	45
PID 1600 wrote to memory of 2244	1600	net.exe	45
PID 1992 wrote to memory of 2228	1992	net.exe	44
PID 1992 wrote to memory of 2228	1992	net.exe	44
PID 1992 wrote to memory of 2228	1992	net.exe	44
PID 1992 wrote to memory of 2228	1992	net.exe	44
PID 596 wrote to memory of 2136	596	net.exe	43
PID 596 wrote to memory of 2136	596	net.exe	43
PID 596 wrote to memory of 2136	596	net.exe	43
PID 596 wrote to memory of 2136	596	net.exe	43
PID 996 wrote to memory of 2236	996	net.exe	46
PID 996 wrote to memory of 2236	996	net.exe	46
PID 996 wrote to memory of 2236	996	net.exe	46
PID 996 wrote to memory of 2236	996	net.exe	46
PID 1084 wrote to memory of 2252	1084	net.exe	47
PID 1084 wrote to memory of 2252	1084	net.exe	47
PID 1084 wrote to memory of 2252	1084	net.exe	47
PID 1084 wrote to memory of 2252	1084	net.exe	47
PID 1672 wrote to memory of 35076	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	48
PID 1672 wrote to memory of 35076	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	48
PID 1672 wrote to memory of 35076	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	48
PID 1672 wrote to memory of 35076	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	48
PID 35076 wrote to memory of 35120	35076	net.exe	50
PID 35076 wrote to memory of 35120	35076	net.exe	50
PID 35076 wrote to memory of 35120	35076	net.exe	50
PID 35076 wrote to memory of 35120	35076	net.exe	50
PID 1672 wrote to memory of 35728	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	51
PID 1672 wrote to memory of 35728	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	51
PID 1672 wrote to memory of 35728	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	51
PID 1672 wrote to memory of 35728	1672	683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe	51

C:\Users\Admin\AppData\Local\Temp\683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe
"C:\Users\Admin\AppData\Local\Temp\683c3cdeda665afca5af0d964d280f27b3fbb77185b0a24584e139c33c5edddb.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1672
- C:\Users\Admin\AppData\Local\Temp\zXWyTgQ.exe
  "C:\Users\Admin\AppData\Local\Temp\zXWyTgQ.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:760
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:596
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "audioendpointbuilder" /y
      4⤵
      PID:2136
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2000
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:2156
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    PID:36732
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:36756
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1992
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:2228
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1084
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:2252
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1600
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:2244
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:996
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:2236
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:35076
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:35120
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:35728
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:35724
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:36656
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:36684
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:36696
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:36720

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1672-55-0x0000000075F81000-0x0000000075F83000-memory.dmp

Filesize
8KB

Download