ryuk | 80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05

Analysis

max time kernel
175s
max time network
96s
platform
windows7_x64
resource
win7-en-20211208
submitted
20-02-2022 05:14

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General

Target

80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe
Size

203KB
MD5

8431a207fab74137df795fb46732544c
SHA1

abb80c03d3aa69ac38f62a447636b0fc1bf21d45
SHA256

80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05
SHA512

98971c7ff9154482a53c05e725cea25f873ed88d6ac721e943bad35183ad070788f28da22ec2f8ee5fb38b862664a37c15b97bffcb5567d54c6476b1abef39db

Score

10^/10

ryuk persistence 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:\Documents and Settings\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
820	qcmUfvS.exe

Loads dropped DLL 2 IoCs

pid	Process
1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe
1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\qcmUfvS.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Windows\\system32\\taskhost.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.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 64 IoCs

pid	Process
1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe
1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe
820	qcmUfvS.exe
1116	taskhost.exe
1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe
1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
820	qcmUfvS.exe
820	qcmUfvS.exe
820	qcmUfvS.exe
820	qcmUfvS.exe
1116	taskhost.exe
820	qcmUfvS.exe
1116	taskhost.exe
820	qcmUfvS.exe
1116	taskhost.exe
820	qcmUfvS.exe
1116	taskhost.exe
820	qcmUfvS.exe
1116	taskhost.exe
820	qcmUfvS.exe
1116	taskhost.exe
820	qcmUfvS.exe
1116	taskhost.exe
820	qcmUfvS.exe
1116	taskhost.exe
820	qcmUfvS.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
1116	taskhost.exe
820	qcmUfvS.exe
1116	taskhost.exe
820	qcmUfvS.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe
Token: SeBackupPrivilege	820	qcmUfvS.exe
Token: SeBackupPrivilege	1116	taskhost.exe
Token: SeBackupPrivilege	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1528 wrote to memory of 820	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	29
PID 1528 wrote to memory of 820	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	29
PID 1528 wrote to memory of 820	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	29
PID 1528 wrote to memory of 1116	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	19
PID 1528 wrote to memory of 676	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	30
PID 1528 wrote to memory of 676	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	30
PID 1528 wrote to memory of 676	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	30
PID 1528 wrote to memory of 276	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	32
PID 1528 wrote to memory of 276	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	32
PID 1528 wrote to memory of 276	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	32
PID 1528 wrote to memory of 1172	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	18
PID 676 wrote to memory of 1260	676	net.exe	35
PID 676 wrote to memory of 1260	676	net.exe	35
PID 676 wrote to memory of 1260	676	net.exe	35
PID 276 wrote to memory of 1328	276	net.exe	34
PID 276 wrote to memory of 1328	276	net.exe	34
PID 276 wrote to memory of 1328	276	net.exe	34
PID 1116 wrote to memory of 308	1116	taskhost.exe	36
PID 1116 wrote to memory of 308	1116	taskhost.exe	36
PID 1116 wrote to memory of 308	1116	taskhost.exe	36
PID 1116 wrote to memory of 916	1116	taskhost.exe	37
PID 1116 wrote to memory of 916	1116	taskhost.exe	37
PID 1116 wrote to memory of 916	1116	taskhost.exe	37
PID 820 wrote to memory of 756	820	qcmUfvS.exe	39
PID 820 wrote to memory of 756	820	qcmUfvS.exe	39
PID 820 wrote to memory of 756	820	qcmUfvS.exe	39
PID 756 wrote to memory of 2024	756	net.exe	42
PID 756 wrote to memory of 2024	756	net.exe	42
PID 756 wrote to memory of 2024	756	net.exe	42
PID 916 wrote to memory of 1792	916	net.exe	40
PID 916 wrote to memory of 1792	916	net.exe	40
PID 916 wrote to memory of 1792	916	net.exe	40
PID 1528 wrote to memory of 1944	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	44
PID 1528 wrote to memory of 1944	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	44
PID 1528 wrote to memory of 1944	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	44
PID 1528 wrote to memory of 1952	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	45
PID 1528 wrote to memory of 1952	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	45
PID 1528 wrote to memory of 1952	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	45
PID 1944 wrote to memory of 1348	1944	net.exe	48
PID 1944 wrote to memory of 1348	1944	net.exe	48
PID 1944 wrote to memory of 1348	1944	net.exe	48
PID 308 wrote to memory of 2256	308	cmd.exe	49
PID 308 wrote to memory of 2256	308	cmd.exe	49
PID 308 wrote to memory of 2256	308	cmd.exe	49
PID 1952 wrote to memory of 2264	1952	cmd.exe	50
PID 1952 wrote to memory of 2264	1952	cmd.exe	50
PID 1952 wrote to memory of 2264	1952	cmd.exe	50
PID 820 wrote to memory of 7188	820	qcmUfvS.exe	51
PID 820 wrote to memory of 7188	820	qcmUfvS.exe	51
PID 820 wrote to memory of 7188	820	qcmUfvS.exe	51
PID 7188 wrote to memory of 7240	7188	cmd.exe	53
PID 7188 wrote to memory of 7240	7188	cmd.exe	53
PID 7188 wrote to memory of 7240	7188	cmd.exe	53
PID 1528 wrote to memory of 7992	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	54
PID 1528 wrote to memory of 7992	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	54
PID 1528 wrote to memory of 7992	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	54
PID 7992 wrote to memory of 8016	7992	net.exe	56
PID 7992 wrote to memory of 8016	7992	net.exe	56
PID 7992 wrote to memory of 8016	7992	net.exe	56
PID 1528 wrote to memory of 89504	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	57
PID 1528 wrote to memory of 89504	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	57
PID 1528 wrote to memory of 89504	1528	80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe	57
PID 89504 wrote to memory of 91140	89504	net.exe	59
PID 89504 wrote to memory of 91140	89504	net.exe	59

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1172

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1116
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Windows\system32\taskhost.exe" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:308
- - C:\Windows\system32\reg.exe
    REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Windows\system32\taskhost.exe" /f
    3⤵
    - Adds Run key to start application
    PID:2256
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:916
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:1792
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:97520
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:99652

C:\Users\Admin\AppData\Local\Temp\80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe
"C:\Users\Admin\AppData\Local\Temp\80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1528
- C:\Users\Admin\AppData\Local\Temp\qcmUfvS.exe
  "C:\Users\Admin\AppData\Local\Temp\qcmUfvS.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:820
- - C:\Windows\System32\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:756
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:2024
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\qcmUfvS.exe" /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:7188
  - - C:\Windows\system32\reg.exe
      REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\qcmUfvS.exe" /f
      4⤵
      Adds Run key to start application
      PID:7240
- - C:\Windows\System32\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    PID:111712
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:112380
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:676
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:1260
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:276
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:1328
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1944
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:1348
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1952
- - C:\Windows\system32\reg.exe
    REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\80bb8c391d008606bf99888d7341e530375b92b0ff5ad326b0b0fddacb5ebb05.exe" /f
    3⤵
    - Adds Run key to start application
    PID:2264
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:7992
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:8016
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:89504
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:91140

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1116-59-0x000000013FB90000-0x000000013FC26000-memory.dmp

Filesize
600KB

Download
memory/1116-58-0x000000013FB90000-0x000000013FC26000-memory.dmp

Filesize
600KB

Download
memory/1528-54-0x000007FEFB9C1000-0x000007FEFB9C3000-memory.dmp

Filesize
8KB

Download