Analysis

  • max time kernel
    45s
  • max time network
    49s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    02-11-2022 15:05

General

  • Target

    fisakalzbx64.exe

  • Size

    4.5MB

  • MD5

    4a30561d4524503303a22cc33091cb2c

  • SHA1

    c9392e3487d5c75f26eb0c736ba6b88e9a60512c

  • SHA256

    335119cef0b806406212347029779044b164106236a415669f6d544ec3417b42

  • SHA512

    19e6875992a1e890aa60b957dc3e0f9c6f4162b3ac859e13323e20a75fa903858c535d41abd512743264410c5b8c32802db8cc00b1e97027db7319cb440aa9a6

  • SSDEEP

    49152:KLLA3Hrb/TzvO90dL3BmAFd4A64nsfJwwkr6OR1Q7Y2i1CC5E9ngrabyP2NgIo2Q:d3FJbQUHEF2uN86nubOC0DCZFOs

Malware Config

Signatures

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies extensions of user files 4 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Drops startup file 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Drops file in Program Files directory 64 IoCs
  • Launches sc.exe 1 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Interacts with shadow copies 2 TTPs 1 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fisakalzbx64.exe
    "C:\Users\Admin\AppData\Local\Temp\fisakalzbx64.exe"
    1⤵
    • Modifies extensions of user files
    • Drops startup file
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:1212
    • C:\Windows\system32\cmd.exe
      cmd /c C:\Users\Admin\AppData\Local\Temp\xkisvlkwqlmtjesmwpo.bat
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:996
      • C:\Windows\system32\sc.exe
        SC QUERY
        3⤵
        • Launches sc.exe
        PID:1584
      • C:\Windows\system32\findstr.exe
        FINDSTR SERVICE_NAME
        3⤵
          PID:1164
      • C:\Windows\system32\cmd.exe
        cmd /c C:\Users\Admin\AppData\Local\Temp\bhcsiea.bat
        2⤵
          PID:1436
        • C:\Windows\system32\cmd.exe
          cmd /c C:\Users\Admin\AppData\Local\Temp\ljrqtyangopbnetfake.bat
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:472
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            3⤵
            • Interacts with shadow copies
            PID:1428
        • C:\Windows\system32\cmd.exe
          cmd /c C:\Users\Admin\AppData\Local\Temp\yprcqmipsorwjhmnw.bat
          2⤵
            PID:556
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:544

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\ljrqtyangopbnetfake.bat

          Filesize

          47B

          MD5

          2202e846ba05d7f0bb20adbc5249c359

          SHA1

          4115d2d15614503456aea14db61d71a756cc7b8c

          SHA256

          0965cb8ee38adedd9ba06bdad9220a35890c2df0e4c78d0559cd6da653bf740f

          SHA512

          cd6ce6d89a8e5f75724405bc2694b706819c3c554b042075d5eb47fdb75653235160ac8a85e7425a49d98f25b3886faaaec5599bcf66d20bf6115dc3af4ba9c7

        • C:\Users\Admin\AppData\Local\Temp\xkisvlkwqlmtjesmwpo.bat

          Filesize

          43B

          MD5

          55310bb774fff38cca265dbc70ad6705

          SHA1

          cb8d76e9fd38a0b253056e5f204dab5441fe932b

          SHA256

          1fbdb97893d09d59575c3ef95df3c929fe6b6ddf1b273283e4efadf94cdc802d

          SHA512

          40e5a5e8454ca3eaac36d732550e2c5d869a235e3bbc4d31c4afa038fe4e06f782fa0885e876ad8119be766477fdcc12c1d5d04d53cf6b324e366b5351fc7cd4

        • memory/472-59-0x0000000000000000-mapping.dmp

        • memory/556-62-0x0000000000000000-mapping.dmp

        • memory/996-54-0x0000000000000000-mapping.dmp

        • memory/1164-57-0x0000000000000000-mapping.dmp

        • memory/1428-61-0x0000000000000000-mapping.dmp

        • memory/1436-58-0x0000000000000000-mapping.dmp

        • memory/1584-56-0x0000000000000000-mapping.dmp