ryuk | 7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9

Analysis

max time kernel
174s
max time network
148s
platform
windows7_x64
resource
win7-en-20211208
submitted
20/02/2022, 05:44

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General

Target

7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
Size

191KB
MD5

708f63f5ef0bafa61743f242f470480f
SHA1

96233bf3b488a31852b8e32f7cb91dd5d935f9c2
SHA256

7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9
SHA512

5e202f916430e179373c814e2b2cefbb993b83c597776afecea731c190f3aec1ce21c76ce1786afc8ab5d92c060201ce0828b9ac81d709407a8b6358146260c9

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> </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
1660	QUkJTEr.exe

Loads dropped DLL 2 IoCs

pid	Process
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\QUkJTEr.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe"	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 20 IoCs

pid	Process
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1660	QUkJTEr.exe
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1660	QUkJTEr.exe
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
1660	QUkJTEr.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
Token: SeBackupPrivilege	1660	QUkJTEr.exe
Token: SeBackupPrivilege	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 1660	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	27
PID 1700 wrote to memory of 1660	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	27
PID 1700 wrote to memory of 1660	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	27
PID 1700 wrote to memory of 1660	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	27
PID 1700 wrote to memory of 1108	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	8
PID 1700 wrote to memory of 1172	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	14
PID 1700 wrote to memory of 528	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	28
PID 1700 wrote to memory of 528	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	28
PID 1700 wrote to memory of 528	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	28
PID 1700 wrote to memory of 528	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	28
PID 1700 wrote to memory of 1488	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	30
PID 1700 wrote to memory of 1488	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	30
PID 1700 wrote to memory of 1488	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	30
PID 1700 wrote to memory of 1488	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	30
PID 1700 wrote to memory of 1816	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	32
PID 1700 wrote to memory of 1816	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	32
PID 1700 wrote to memory of 1816	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	32
PID 1700 wrote to memory of 1816	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	32
PID 1700 wrote to memory of 1156	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	34
PID 1700 wrote to memory of 1156	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	34
PID 1700 wrote to memory of 1156	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	34
PID 1700 wrote to memory of 1156	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	34
PID 1700 wrote to memory of 1860	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	36
PID 1700 wrote to memory of 1860	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	36
PID 1700 wrote to memory of 1860	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	36
PID 1700 wrote to memory of 1860	1700	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	36
PID 1660 wrote to memory of 1864	1660	QUkJTEr.exe	38
PID 1660 wrote to memory of 1864	1660	QUkJTEr.exe	38
PID 1660 wrote to memory of 1864	1660	QUkJTEr.exe	38
PID 1660 wrote to memory of 1864	1660	QUkJTEr.exe	38
PID 1660 wrote to memory of 1904	1660	QUkJTEr.exe	40
PID 1660 wrote to memory of 1904	1660	QUkJTEr.exe	40
PID 1660 wrote to memory of 1904	1660	QUkJTEr.exe	40
PID 1660 wrote to memory of 1904	1660	QUkJTEr.exe	40
PID 1816 wrote to memory of 1680	1816	net.exe	45
PID 1816 wrote to memory of 1680	1816	net.exe	45
PID 1816 wrote to memory of 1680	1816	net.exe	45
PID 1816 wrote to memory of 1680	1816	net.exe	45
PID 1156 wrote to memory of 1548	1156	net.exe	43
PID 1156 wrote to memory of 1548	1156	net.exe	43
PID 1156 wrote to memory of 1548	1156	net.exe	43
PID 1156 wrote to memory of 1548	1156	net.exe	43
PID 528 wrote to memory of 1668	528	net.exe	44
PID 528 wrote to memory of 1668	528	net.exe	44
PID 528 wrote to memory of 1668	528	net.exe	44
PID 528 wrote to memory of 1668	528	net.exe	44
PID 1864 wrote to memory of 1620	1864	net.exe	42
PID 1864 wrote to memory of 1620	1864	net.exe	42
PID 1864 wrote to memory of 1620	1864	net.exe	42
PID 1864 wrote to memory of 1620	1864	net.exe	42
PID 1488 wrote to memory of 1336	1488	net.exe	46
PID 1488 wrote to memory of 1336	1488	net.exe	46
PID 1488 wrote to memory of 1336	1488	net.exe	46
PID 1488 wrote to memory of 1336	1488	net.exe	46
PID 1860 wrote to memory of 1868	1860	cmd.exe	47
PID 1860 wrote to memory of 1868	1860	cmd.exe	47
PID 1860 wrote to memory of 1868	1860	cmd.exe	47
PID 1860 wrote to memory of 1868	1860	cmd.exe	47
PID 1904 wrote to memory of 916	1904	net.exe	48
PID 1904 wrote to memory of 916	1904	net.exe	48
PID 1904 wrote to memory of 916	1904	net.exe	48
PID 1904 wrote to memory of 916	1904	net.exe	48
PID 1660 wrote to memory of 3064	1660	QUkJTEr.exe	51
PID 1660 wrote to memory of 3064	1660	QUkJTEr.exe	51

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
PID:1108

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

C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
"C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1700
- C:\Users\Admin\AppData\Local\Temp\QUkJTEr.exe
  "C:\Users\Admin\AppData\Local\Temp\QUkJTEr.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1660
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1864
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "audioendpointbuilder" /y
      4⤵
      PID:1620
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1904
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:916
- - C:\Windows\SysWOW64\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\QUkJTEr.exe" /f /reg:64
    3⤵
    PID:3064
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\QUkJTEr.exe" /f /reg:64
      4⤵
      Adds Run key to start application
      PID:932
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    PID:36236
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:36272
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:528
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:1668
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1488
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:1336
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1816
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:1680
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1156
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:1548
- C:\Windows\SysWOW64\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\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe" /f /reg:64
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1860
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe" /f /reg:64
    3⤵
    - Adds Run key to start application
    PID:1868
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:4304
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:4328
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:4752
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:4976
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:36384
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:36504
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:36740
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:36020

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

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Downloads

memory/1108-60-0x0000000030000000-0x0000000030170000-memory.dmp

Filesize
1.4MB

Download
memory/1700-55-0x0000000075F91000-0x0000000075F93000-memory.dmp

Filesize
8KB

Download