Overview

overview

10

Static

static

a188e147ba...f4.exe

windows7_x64

10

a188e147ba...f4.exe

windows10_x64

10

Analysis

  • max time kernel
    133s
  • max time network
    148s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    02-11-2020 04:22

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General

  • Target

    a188e147ba147455ce5e3a6eb8ac1a46bdd58588de7af53d4ad542c6986491f4.exe

Score
10/10
regretlockerpersistenceransomwarespyware

Malware Config

Extracted

Path

C:\$Recycle.Bin\S-1-5-21-1985363256-3005190890-1182679451-1000\HOW TO RESTORE FILES.TXT

Ransom Note
Hello, friend. All your files were encrypted. If you want to restore them, please email us : [email protected]

Signatures

  • RegretLocker

    Ransomware first reported on Twitter in October 2020.

    ransomwareregretlocker
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Modifies extensions of user files 14 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spyware
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Drops desktop.ini file(s) 18 IoCs
  • Enumerates connected drives 3 TTPs 3 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Modifies service 2 TTPs 4 IoCs
    persistence
  • Drops file in Program Files directory 12004 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

    persistence
  • Suspicious behavior: EnumeratesProcesses 464 IoCs
  • Suspicious use of AdjustPrivilegeToken 45 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a188e147ba147455ce5e3a6eb8ac1a46bdd58588de7af53d4ad542c6986491f4.exe
    "C:\Users\Admin\AppData\Local\Temp\a188e147ba147455ce5e3a6eb8ac1a46bdd58588de7af53d4ad542c6986491f4.exe"
    1⤵
    • Modifies extensions of user files
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:576
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C schtasks /Create /SC MINUTE /TN "Mouse Application" /TR "C:\Users\Admin\AppData\Local\Temp\a188e147ba147455ce5e3a6eb8ac1a46bdd58588de7af53d4ad542c6986491f4.exe" /f
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2892
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /Create /SC MINUTE /TN "Mouse Application" /TR "C:\Users\Admin\AppData\Local\Temp\a188e147ba147455ce5e3a6eb8ac1a46bdd58588de7af53d4ad542c6986491f4.exe" /f
        3⤵
        • Creates scheduled task(s)
        PID:3204
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C wmic SHADOWCOPY DELETE & wbadmin DELETE SYSTEMSTATEBACKUP & bcdedit.exe / set{ default } bootstatuspolicy ignoreallfailures & bcdedit.exe / set{ default } recoveryenabled No
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3764
      • C:\Windows\SysWOW64\Wbem\WMIC.exe
        wmic SHADOWCOPY DELETE
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:212
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Modifies service
    • Suspicious use of AdjustPrivilegeToken
    PID:1336
  • C:\Users\Admin\AppData\Local\Temp\a188e147ba147455ce5e3a6eb8ac1a46bdd58588de7af53d4ad542c6986491f4.exe
    C:\Users\Admin\AppData\Local\Temp\a188e147ba147455ce5e3a6eb8ac1a46bdd58588de7af53d4ad542c6986491f4.exe
    1⤵
      PID:3020
    • C:\Users\Admin\AppData\Local\Temp\a188e147ba147455ce5e3a6eb8ac1a46bdd58588de7af53d4ad542c6986491f4.exe
      C:\Users\Admin\AppData\Local\Temp\a188e147ba147455ce5e3a6eb8ac1a46bdd58588de7af53d4ad542c6986491f4.exe
      1⤵
        PID:3960

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\$Recycle.Bin\S-1-5-21-1985363256-3005190890-1182679451-1000\desktop.ini
        MD5

        8cc162be409eac6514a36627b79a7027

        SHA1

        d7b3672574876bf5e8e41fe85e9555d8a875eee0

        SHA256

        6073f0e85bcd53393cee8103feb9d727a7461d69addab9f8d4a7505d23007c35

        SHA512

        e15af6c15b11deb3c133e8d8517b4a2122513b8efb894ca3e734e33a2ba94bd22688c45e957b259d0de74eb64bd43075460b6d72e2e2eaaded9319b452724a85

        Download Submit

      • \Users\Admin\AppData\Local\Temp\tor-lib.dll
        MD5

        dc7e564809d6c2a2f3457c3c9b91f22b

        SHA1

        f28c63fc7ac58162c27428a179d2113200814e7e

        SHA256

        9969c1e4cf32d1fe6140d6fabf63b6b093a6c6ff7045a187b14175d46cfb74a0

        SHA512

        f37a46895062318aef808c65bd2a074c8177b6e90f9368aae1892db837f7962c4ed1d75ba34c533895f096d3d71b56aecdb6eafbf61b3ecd50b0d4e8c79021f0

        Download Submit

      • memory/212-4-0x0000000000000000-mapping.dmp

        Download

      • memory/2892-1-0x0000000000000000-mapping.dmp

        Download

      • memory/3204-3-0x0000000000000000-mapping.dmp

        Download

      • memory/3764-2-0x0000000000000000-mapping.dmp

        Download