Analysis

  • max time kernel
    150s
  • max time network
    140s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    17/11/2021, 14:58

General

  • Target
    vbc.exe
  • Size 879KB
  • Sample211117-sb6c8adae9
  • SHA256 48667ddc42d9eadc23dddc65f60f0de6e58afb6857953f282f7b02c115e9eed4
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • formbook

Version
  • 4.1

Campaign
  • og2w

C2
  • http://www.wakecountyrealtyexpert.com/og2w/

Decoy
  • patriotxf.com

  • thecreagles.com

  • riverdenim.com

  • cybqo.com

  • zzfangnan.com

  • empowerhis.com

  • resiliencewearmiami.com

  • myticketly.com

  • pistachio.land

  • 13055.club

  • millennialsofacertainage.com

  • jnxdsgc.com

  • pixelsandplastic.digital

  • bugroster.com

  • chargedockz.com

  • gzyazsp.com

  • sintec-consultores.com

  • pourtonmobile.com

  • upmhss.com

  • amkanalrajhi.com

Signatures

  • Formbook

    Formbook is a data stealing malware which is capable of stealing data.

  • Formbook Payload 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Uses the VBS compiler for execution 1 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Modifies registry key 1 TTPs 3 IoCs
  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious behavior: MapViewOfSection 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2416
    • C:\Users\Admin\AppData\Local\Temp\vbc.exe
      "C:\Users\Admin\AppData\Local\Temp\vbc.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious use of WriteProcessMemory
      PID:2272
      • C:\Windows\SysWOW64\logagent.exe
        C:\Windows\System32\logagent.exe
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of AdjustPrivilegeToken
        PID:4380
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Trast.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2980
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /K C:\Users\Public\UKO.bat
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:652
          • C:\Windows\SysWOW64\reg.exe
            reg delete hkcu\Environment /v windir /f
            5⤵
            • Modifies registry key
            PID:876
          • C:\Windows\SysWOW64\reg.exe
            reg add hkcu\Environment /v windir /d "cmd /c start /min C:\Users\Public\KDECO.bat reg delete hkcu\Environment /v windir /f && REM "
            5⤵
            • Modifies registry key
            PID:1040
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I
            5⤵
              PID:1176
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Public\nest.bat" "
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:2356
          • C:\Windows\SysWOW64\reg.exe
            reg delete hkcu\Environment /v windir /f
            4⤵
            • Modifies registry key
            PID:2664
      • C:\Windows\SysWOW64\autochk.exe
        "C:\Windows\SysWOW64\autochk.exe"
        2⤵
          PID:1328
        • C:\Windows\SysWOW64\cscript.exe
          "C:\Windows\SysWOW64\cscript.exe"
          2⤵
          • Suspicious use of SetThreadContext
          • Modifies Internet Explorer settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1324
          • C:\Windows\SysWOW64\cmd.exe
            /c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
            3⤵
              PID:1796
            • C:\Program Files\Mozilla Firefox\Firefox.exe
              "C:\Program Files\Mozilla Firefox\Firefox.exe"
              3⤵
                PID:3808

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                memory/1324-138-0x0000000004A20000-0x0000000004D40000-memory.dmp

                memory/1324-137-0x0000000000590000-0x00000000005BF000-memory.dmp

                memory/1324-144-0x0000000004790000-0x0000000004823000-memory.dmp

                memory/1324-136-0x00000000012C0000-0x00000000012E7000-memory.dmp

                memory/2272-119-0x00000000024B1000-0x00000000024C5000-memory.dmp

                memory/2272-118-0x0000000002400000-0x0000000002401000-memory.dmp

                memory/2416-134-0x0000000002440000-0x0000000002510000-memory.dmp

                memory/2416-145-0x0000000002930000-0x00000000029CB000-memory.dmp

                memory/4380-132-0x0000000005270000-0x0000000005590000-memory.dmp

                memory/4380-133-0x0000000003550000-0x0000000003564000-memory.dmp

                memory/4380-130-0x0000000072480000-0x00000000724AF000-memory.dmp

                memory/4380-129-0x0000000003250000-0x0000000003251000-memory.dmp