Analysis

  • max time kernel
    146s
  • max time network
    138s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    04-05-2021 13:06

General

  • Target

    TT.exe

  • Size

    228KB

  • MD5

    27c863c479b0542b3bad21a67ad1406d

  • SHA1

    791e1d123c275ac4451c5550635c0a67eb4398a6

  • SHA256

    2a7a9c6d4505766ddf0a6c7dde9c2ae52369408fbe5ce93d0d3d76bf992b28dd

  • SHA512

    9b66354f49ade9d600e741cb2e626796830260745b1cd7540d611dc19e8576cacad95a9e03614ba36149df440cbe1efb7de5e73b4fce3a4ab7d60c42451b04da

Malware Config

Extracted

Family

formbook

Version

4.1

C2

http://www.knighttechinca.com/dxe/

Decoy

sardarfarm.com

959tremont.com

privat-livecam.net

ansel-homebakery.com

joysupermarket.com

peninsulamatchmakers.net

northsytyle.com

radioconexaoubermusic.com

relocatingrealtor.com

desyrnan.com

onlinehoortoestel.online

enpointe.online

rvvikings.com

paulpoirier.com

shitarpa.net

kerneis.net

rokitreach.com

essentiallygaia.com

prestiged.net

fuerzaagavera.com

Signatures

  • Formbook

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

  • Formbook Payload 2 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 30 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 4 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1208
    • C:\Users\Admin\AppData\Local\Temp\TT.exe
      "C:\Users\Admin\AppData\Local\Temp\TT.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:1048
      • C:\Users\Admin\AppData\Local\Temp\TT.exe
        "C:\Users\Admin\AppData\Local\Temp\TT.exe"
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of AdjustPrivilegeToken
        PID:1740
    • C:\Windows\SysWOW64\autochk.exe
      "C:\Windows\SysWOW64\autochk.exe"
      2⤵
        PID:1348
      • C:\Windows\SysWOW64\autochk.exe
        "C:\Windows\SysWOW64\autochk.exe"
        2⤵
          PID:316
        • C:\Windows\SysWOW64\autochk.exe
          "C:\Windows\SysWOW64\autochk.exe"
          2⤵
            PID:1600
          • C:\Windows\SysWOW64\cmstp.exe
            "C:\Windows\SysWOW64\cmstp.exe"
            2⤵
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1648
            • C:\Windows\SysWOW64\cmd.exe
              /c del "C:\Users\Admin\AppData\Local\Temp\TT.exe"
              3⤵
              • Deletes itself
              PID:752

        Network

        MITRE ATT&CK Matrix ATT&CK v6

        Discovery

        System Information Discovery

        1
        T1082

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • \Users\Admin\AppData\Local\Temp\nsx1151.tmp\myx92o78208f0o.dll
          MD5

          8bb43d922f43f1eff660149ae2561939

          SHA1

          aa781d53bf123d1dead8c960eebb1079412b36f1

          SHA256

          e61d2234de5a9841b5685b5ff23a2baa6d56f564cdafba16709327adb642c2d1

          SHA512

          76dbf56e555404296b185de8b512dd287cb791b0bbdd2882dd2a86dbeed28551ee57e7b699fc0b5133171a4b47155cce6afb7c02c908578e130856092955e96b

        • memory/752-69-0x0000000000000000-mapping.dmp
        • memory/1048-62-0x0000000000430000-0x0000000000432000-memory.dmp
          Filesize

          8KB

        • memory/1048-59-0x0000000075721000-0x0000000075723000-memory.dmp
          Filesize

          8KB

        • memory/1208-74-0x0000000006FC0000-0x000000000714E000-memory.dmp
          Filesize

          1.6MB

        • memory/1208-66-0x0000000004D20000-0x0000000004E1D000-memory.dmp
          Filesize

          1012KB

        • memory/1648-71-0x00000000000D0000-0x00000000000FE000-memory.dmp
          Filesize

          184KB

        • memory/1648-73-0x0000000000880000-0x0000000000913000-memory.dmp
          Filesize

          588KB

        • memory/1648-72-0x0000000000B50000-0x0000000000E53000-memory.dmp
          Filesize

          3.0MB

        • memory/1648-67-0x0000000000000000-mapping.dmp
        • memory/1648-70-0x0000000000F80000-0x0000000000F98000-memory.dmp
          Filesize

          96KB

        • memory/1740-61-0x000000000041EAF0-mapping.dmp
        • memory/1740-64-0x0000000000970000-0x0000000000C73000-memory.dmp
          Filesize

          3.0MB

        • memory/1740-65-0x00000000003E0000-0x00000000003F4000-memory.dmp
          Filesize

          80KB

        • memory/1740-63-0x0000000000400000-0x000000000042E000-memory.dmp
          Filesize

          184KB