ryuk | 7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9

Analysis

max time kernel
176s
max time network
215s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
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
312	oChGcDY.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	oChGcDY.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-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\oChGcDY.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 18 IoCs

pid	Process
4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
312	oChGcDY.exe
312	oChGcDY.exe
4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
312	oChGcDY.exe
312	oChGcDY.exe
4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
Token: SeBackupPrivilege	312	oChGcDY.exe
Token: SeBackupPrivilege	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 4608 wrote to memory of 312	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	85
PID 4608 wrote to memory of 312	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	85
PID 4608 wrote to memory of 312	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	85
PID 4608 wrote to memory of 2288	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	49
PID 4608 wrote to memory of 4196	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	86
PID 4608 wrote to memory of 4196	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	86
PID 4608 wrote to memory of 4196	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	86
PID 4196 wrote to memory of 2428	4196	net.exe	88
PID 4196 wrote to memory of 2428	4196	net.exe	88
PID 4196 wrote to memory of 2428	4196	net.exe	88
PID 4608 wrote to memory of 1492	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	89
PID 4608 wrote to memory of 1492	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	89
PID 4608 wrote to memory of 1492	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	89
PID 4608 wrote to memory of 2324	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	48
PID 1492 wrote to memory of 696	1492	net.exe	91
PID 1492 wrote to memory of 696	1492	net.exe	91
PID 1492 wrote to memory of 696	1492	net.exe	91
PID 4608 wrote to memory of 2416	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	47
PID 4608 wrote to memory of 764	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	37
PID 4608 wrote to memory of 3240	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	36
PID 4608 wrote to memory of 3344	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	14
PID 4608 wrote to memory of 3408	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	13
PID 4608 wrote to memory of 3496	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	35
PID 4608 wrote to memory of 3688	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	34
PID 4608 wrote to memory of 3580	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	31
PID 4608 wrote to memory of 1084	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	20
PID 4608 wrote to memory of 3672	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	19
PID 4608 wrote to memory of 1232	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	94
PID 4608 wrote to memory of 1232	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	94
PID 4608 wrote to memory of 1232	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	94
PID 1232 wrote to memory of 5024	1232	net.exe	95
PID 1232 wrote to memory of 5024	1232	net.exe	95
PID 1232 wrote to memory of 5024	1232	net.exe	95
PID 4608 wrote to memory of 3628	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	97
PID 4608 wrote to memory of 3628	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	97
PID 4608 wrote to memory of 3628	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	97
PID 3628 wrote to memory of 4100	3628	cmd.exe	99
PID 3628 wrote to memory of 4100	3628	cmd.exe	99
PID 3628 wrote to memory of 4100	3628	cmd.exe	99
PID 4608 wrote to memory of 3952	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	100
PID 4608 wrote to memory of 3952	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	100
PID 4608 wrote to memory of 3952	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	100
PID 3952 wrote to memory of 1820	3952	net.exe	102
PID 3952 wrote to memory of 1820	3952	net.exe	102
PID 3952 wrote to memory of 1820	3952	net.exe	102
PID 312 wrote to memory of 4760	312	oChGcDY.exe	103
PID 312 wrote to memory of 4760	312	oChGcDY.exe	103
PID 312 wrote to memory of 4760	312	oChGcDY.exe	103
PID 4760 wrote to memory of 2036	4760	net.exe	105
PID 4760 wrote to memory of 2036	4760	net.exe	105
PID 4760 wrote to memory of 2036	4760	net.exe	105
PID 312 wrote to memory of 5228	312	oChGcDY.exe	106
PID 312 wrote to memory of 5228	312	oChGcDY.exe	106
PID 312 wrote to memory of 5228	312	oChGcDY.exe	106
PID 5228 wrote to memory of 5288	5228	cmd.exe	108
PID 5228 wrote to memory of 5288	5228	cmd.exe	108
PID 5228 wrote to memory of 5288	5228	cmd.exe	108
PID 4608 wrote to memory of 5328	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	109
PID 4608 wrote to memory of 5328	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	109
PID 4608 wrote to memory of 5328	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	109
PID 5328 wrote to memory of 5392	5328	net.exe	111
PID 5328 wrote to memory of 5392	5328	net.exe	111
PID 5328 wrote to memory of 5392	5328	net.exe	111
PID 4608 wrote to memory of 11108	4608	7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe	112

C:\Windows\System32\RuntimeBroker.exe
C:\Windows\System32\RuntimeBroker.exe -Embedding
1⤵
PID:3408

C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
"C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
1⤵
PID:3344

C:\Windows\System32\RuntimeBroker.exe
C:\Windows\System32\RuntimeBroker.exe -Embedding
1⤵
PID:3672

C:\Windows\system32\backgroundTaskHost.exe
"C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
1⤵
PID:1084

C:\Windows\System32\RuntimeBroker.exe
C:\Windows\System32\RuntimeBroker.exe -Embedding
1⤵
PID:3580

C:\Windows\System32\RuntimeBroker.exe
C:\Windows\System32\RuntimeBroker.exe -Embedding
1⤵
PID:3688

C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
1⤵
PID:3496

C:\Windows\system32\DllHost.exe
C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
1⤵
PID:3240

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
1⤵
PID:764

C:\Windows\system32\taskhostw.exe
taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
1⤵
PID:2416

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
1⤵
PID:2324

C:\Windows\system32\sihost.exe
sihost.exe
1⤵
PID:2288

C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
"C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4608
- C:\Users\Admin\AppData\Local\Temp\oChGcDY.exe
  "C:\Users\Admin\AppData\Local\Temp\oChGcDY.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:312
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\System32\net.exe" stop "samss" /y
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4760
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop "samss" /y
      4⤵
      PID:2036
- - 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\oChGcDY.exe" /f /reg:64
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:5228
  - - 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\oChGcDY.exe" /f /reg:64
      4⤵
      Adds Run key to start application
      PID:5288
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4196
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:2428
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1492
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:696
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1232
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:5024
- 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:3628
- - 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:4100
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3952
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:1820
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5328
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:5392
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:11108
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:11188
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  PID:11224
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:10784

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Windows 7 deprecation

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Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads