Analysis

  • max time kernel
    648s
  • max time network
    680s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    24-08-2021 05:46

General

  • Target

    5072678821b490853eff0a97191f262c4e8404984dd8d5be1151fef437ca26db.exe

  • Size

    546KB

  • MD5

    8ab0375228416b89becff72a0ae40654

  • SHA1

    75f06b636efe53360287c0ff1f51ea7de1e7c8b5

  • SHA256

    5072678821b490853eff0a97191f262c4e8404984dd8d5be1151fef437ca26db

  • SHA512

    c9f500f347b3b35beeecc1b7ab9fda273a149376d488f68eb456a5625e9c5bf541d85ddbdd7c127c9d92406d9ea9e7d15aae9d4d4c518bce926a55bf1b106277

Malware Config

Extracted

Path

C:\Program Files\7-Zip\Restore-My-Files.txt

Family

lockbit

Ransom Note
All your important files are encrypted! Any attempts to restore your files with the thrid-party software will be fatal for your files! RESTORE YOU DATA POSIBLE ONLY BUYING private key from us. There is only one way to get your files back: | 1. Download Tor browser - https://www.torproject.org/ and install it. | 2. Open link in TOR browser - http://lockbitks2tvnmwk.onion/?92727EE520AEBC7D97F4BDABFF6A40BA This link only works in Tor Browser! | 3. Follow the instructions on this page ### Attention! ### # Do not rename encrypted files. # Do not try to decrypt using third party software, it may cause permanent data loss. # Decryption of your files with the help of third parties may cause increased price(they add their fee to our). # Tor Browser may be blocked in your country or corporate network. Use https://bridges.torproject.org or use Tor Browser over VPN. # Tor Browser user manual https://tb-manual.torproject.org/about !!! We also download huge amount of your private data, including finance information, clients personal info, network diagrams, passwords and so on. Don't forget about GDPR.
URLs

http://lockbitks2tvnmwk.onion/?92727EE520AEBC7D97F4BDABFF6A40BA

Signatures

  • Lockbit

    Ransomware family with multiple variants released since late 2019.

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Modifies extensions of user files 7 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Uses the VBS compiler for execution 1 TTPs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 64 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Program crash 1 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 49 IoCs
  • Suspicious use of WriteProcessMemory 44 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5072678821b490853eff0a97191f262c4e8404984dd8d5be1151fef437ca26db.exe
    "C:\Users\Admin\AppData\Local\Temp\5072678821b490853eff0a97191f262c4e8404984dd8d5be1151fef437ca26db.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:528
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
      C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
      2⤵
      • Modifies extensions of user files
      • Adds Run key to start application
      • Sets desktop wallpaper using registry
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1128
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /c vssadmin delete shadows /all /quiet & wmic shadowcopy delete & bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no & wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:820
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:768
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1888
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2744
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2756
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2768
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C ping 127.0.0.7 -n 3 > Nul & fsutil file setZeroData offset=0 length=524288 "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" & Del /f /q "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2764
        • C:\Windows\SysWOW64\PING.EXE
          ping 127.0.0.7 -n 3
          4⤵
          • Runs ping.exe
          PID:2768
        • C:\Windows\SysWOW64\fsutil.exe
          fsutil file setZeroData offset=0 length=524288 "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
          4⤵
          • Drops file in Windows directory
          PID:2968
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1128 -s 4964
        3⤵
        • Program crash
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        PID:2780
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:752
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2828
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2864
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2892

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Execution

      Command-Line Interface

      1
      T1059

      Scripting

      1
      T1064

      Persistence

      Registry Run Keys / Startup Folder

      1
      T1060

      Defense Evasion

      File Deletion

      3
      T1107

      Scripting

      1
      T1064

      Modify Registry

      2
      T1112

      Discovery

      Remote System Discovery

      1
      T1018

      Impact

      Inhibit System Recovery

      4
      T1490

      Defacement

      1
      T1491

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • memory/528-60-0x0000000000E50000-0x0000000000E51000-memory.dmp
        Filesize

        4KB

      • memory/528-62-0x0000000075FF1000-0x0000000075FF3000-memory.dmp
        Filesize

        8KB

      • memory/528-63-0x0000000004BC0000-0x0000000004BC1000-memory.dmp
        Filesize

        4KB

      • memory/768-69-0x0000000000000000-mapping.dmp
      • memory/820-68-0x0000000000000000-mapping.dmp
      • memory/1128-64-0x0000000000400000-0x000000000042A000-memory.dmp
        Filesize

        168KB

      • memory/1128-65-0x000000000041B160-mapping.dmp
      • memory/1128-67-0x0000000000400000-0x000000000042A000-memory.dmp
        Filesize

        168KB

      • memory/1888-70-0x0000000000000000-mapping.dmp
      • memory/2744-71-0x0000000000000000-mapping.dmp
      • memory/2756-72-0x0000000000000000-mapping.dmp
      • memory/2764-75-0x0000000000000000-mapping.dmp
      • memory/2768-73-0x0000000000000000-mapping.dmp
      • memory/2768-74-0x000007FEFBBB1000-0x000007FEFBBB3000-memory.dmp
        Filesize

        8KB

      • memory/2768-77-0x0000000000000000-mapping.dmp
      • memory/2780-76-0x0000000000000000-mapping.dmp
      • memory/2780-80-0x0000000001DE0000-0x0000000001DE1000-memory.dmp
        Filesize

        4KB

      • memory/2968-78-0x0000000000000000-mapping.dmp