Analysis

  • max time kernel
    150s
  • max time network
    136s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    27-01-2022 13:02

General

  • Target

    new PO.rtf

  • Size

    11KB

  • MD5

    7a61e1f2990ed01daba36a19255a7967

  • SHA1

    f35678a6116f884a65f8ff77e4c0e4efdd65f792

  • SHA256

    916b82ec72b04beca20629129e3401d2f06a76026d12cd3c41fc28b927fbdf83

  • SHA512

    e0ab039f84b7ace5c8a9a9d3ede87a65a19ae7d624529af27f2ea94c3e21a7b658efee226f995ac81863135d3b6542f272aa9e5e89c4042ca1d0e4d569222639

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

a83r

Decoy

comercializadoralonso.com

durhamschoolservces.com

onegreencapital.com

smartcities24.com

maquinas.store

brianlovesbonsai.com

xin41518s.com

moneyearnus.xyz

be-mix.com

fengyat.club

inspectdecided.xyz

paksafpakistan.com

orhidlnt.top

princesuraj.com

vietnamvodka.com

renewnow.site

imageservices.xyz

luxurytravelfranchise.com

kp112.red

royalyorkfirewood.com

Signatures

  • Formbook

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

  • suricata: ET MALWARE FormBook CnC Checkin (GET)

    suricata: ET MALWARE FormBook CnC Checkin (GET)

  • suricata: ET MALWARE Possible Compromised Host AnubisNetworks Sinkhole Cookie Value Snkz

    suricata: ET MALWARE Possible Compromised Host AnubisNetworks Sinkhole Cookie Value Snkz

  • Formbook Payload 1 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 25 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    PID:1248
    • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
      "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\new PO.rtf"
      2⤵
      • Drops file in Windows directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1696
      • C:\Windows\splwow64.exe
        C:\Windows\splwow64.exe 12288
        3⤵
          PID:572
      • C:\Windows\SysWOW64\autochk.exe
        "C:\Windows\SysWOW64\autochk.exe"
        2⤵
          PID:1876
        • C:\Windows\SysWOW64\wscript.exe
          "C:\Windows\SysWOW64\wscript.exe"
          2⤵
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:760
          • C:\Windows\SysWOW64\cmd.exe
            /c del "C:\Users\Admin\AppData\Roaming\aguerofn5761.exe"
            3⤵
              PID:1504
        • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
          "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
          1⤵
          • Blocklisted process makes network request
          • Loads dropped DLL
          • Launches Equation Editor
          • Suspicious use of WriteProcessMemory
          PID:756
          • C:\Users\Admin\AppData\Roaming\aguerofn5761.exe
            "C:\Users\Admin\AppData\Roaming\aguerofn5761.exe"
            2⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1832
            • C:\Users\Admin\AppData\Roaming\aguerofn5761.exe
              "C:\Users\Admin\AppData\Roaming\aguerofn5761.exe"
              3⤵
              • Executes dropped EXE
              PID:888
            • C:\Users\Admin\AppData\Roaming\aguerofn5761.exe
              "C:\Users\Admin\AppData\Roaming\aguerofn5761.exe"
              3⤵
              • Executes dropped EXE
              PID:1520
            • C:\Users\Admin\AppData\Roaming\aguerofn5761.exe
              "C:\Users\Admin\AppData\Roaming\aguerofn5761.exe"
              3⤵
              • Executes dropped EXE
              PID:1324
            • C:\Users\Admin\AppData\Roaming\aguerofn5761.exe
              "C:\Users\Admin\AppData\Roaming\aguerofn5761.exe"
              3⤵
              • Executes dropped EXE
              PID:1772
            • C:\Users\Admin\AppData\Roaming\aguerofn5761.exe
              "C:\Users\Admin\AppData\Roaming\aguerofn5761.exe"
              3⤵
              • Executes dropped EXE
              PID:1156

        Network

        MITRE ATT&CK Matrix ATT&CK v6

        Execution

        Exploitation for Client Execution

        1
        T1203

        Defense Evasion

        Modify Registry

        1
        T1112

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Roaming\aguerofn5761.exe
          MD5

          f6eaacd1b39028130602ee0892e67663

          SHA1

          12ba0b4e8c41ececa29814f9b64da351e5509fb0

          SHA256

          1e144fefc15a6a2643674f01b3324e29b5320d45a16a081e8aad8a969712cb9d

          SHA512

          a5705ae52ffde84bbd90d6335f23ffccaccbde9b2e75d2462216662a60cf6a178a6a7f2b318975fd77d05ffc1746c357fc85c717fa2aa20cb480e452e9c5463b

        • C:\Users\Admin\AppData\Roaming\aguerofn5761.exe
          MD5

          f6eaacd1b39028130602ee0892e67663

          SHA1

          12ba0b4e8c41ececa29814f9b64da351e5509fb0

          SHA256

          1e144fefc15a6a2643674f01b3324e29b5320d45a16a081e8aad8a969712cb9d

          SHA512

          a5705ae52ffde84bbd90d6335f23ffccaccbde9b2e75d2462216662a60cf6a178a6a7f2b318975fd77d05ffc1746c357fc85c717fa2aa20cb480e452e9c5463b

        • C:\Users\Admin\AppData\Roaming\aguerofn5761.exe
          MD5

          f6eaacd1b39028130602ee0892e67663

          SHA1

          12ba0b4e8c41ececa29814f9b64da351e5509fb0

          SHA256

          1e144fefc15a6a2643674f01b3324e29b5320d45a16a081e8aad8a969712cb9d

          SHA512

          a5705ae52ffde84bbd90d6335f23ffccaccbde9b2e75d2462216662a60cf6a178a6a7f2b318975fd77d05ffc1746c357fc85c717fa2aa20cb480e452e9c5463b

        • C:\Users\Admin\AppData\Roaming\aguerofn5761.exe
          MD5

          f6eaacd1b39028130602ee0892e67663

          SHA1

          12ba0b4e8c41ececa29814f9b64da351e5509fb0

          SHA256

          1e144fefc15a6a2643674f01b3324e29b5320d45a16a081e8aad8a969712cb9d

          SHA512

          a5705ae52ffde84bbd90d6335f23ffccaccbde9b2e75d2462216662a60cf6a178a6a7f2b318975fd77d05ffc1746c357fc85c717fa2aa20cb480e452e9c5463b

        • C:\Users\Admin\AppData\Roaming\aguerofn5761.exe
          MD5

          f6eaacd1b39028130602ee0892e67663

          SHA1

          12ba0b4e8c41ececa29814f9b64da351e5509fb0

          SHA256

          1e144fefc15a6a2643674f01b3324e29b5320d45a16a081e8aad8a969712cb9d

          SHA512

          a5705ae52ffde84bbd90d6335f23ffccaccbde9b2e75d2462216662a60cf6a178a6a7f2b318975fd77d05ffc1746c357fc85c717fa2aa20cb480e452e9c5463b

        • C:\Users\Admin\AppData\Roaming\aguerofn5761.exe
          MD5

          f6eaacd1b39028130602ee0892e67663

          SHA1

          12ba0b4e8c41ececa29814f9b64da351e5509fb0

          SHA256

          1e144fefc15a6a2643674f01b3324e29b5320d45a16a081e8aad8a969712cb9d

          SHA512

          a5705ae52ffde84bbd90d6335f23ffccaccbde9b2e75d2462216662a60cf6a178a6a7f2b318975fd77d05ffc1746c357fc85c717fa2aa20cb480e452e9c5463b

        • C:\Users\Admin\AppData\Roaming\aguerofn5761.exe
          MD5

          f6eaacd1b39028130602ee0892e67663

          SHA1

          12ba0b4e8c41ececa29814f9b64da351e5509fb0

          SHA256

          1e144fefc15a6a2643674f01b3324e29b5320d45a16a081e8aad8a969712cb9d

          SHA512

          a5705ae52ffde84bbd90d6335f23ffccaccbde9b2e75d2462216662a60cf6a178a6a7f2b318975fd77d05ffc1746c357fc85c717fa2aa20cb480e452e9c5463b

        • \Users\Admin\AppData\Roaming\aguerofn5761.exe
          MD5

          f6eaacd1b39028130602ee0892e67663

          SHA1

          12ba0b4e8c41ececa29814f9b64da351e5509fb0

          SHA256

          1e144fefc15a6a2643674f01b3324e29b5320d45a16a081e8aad8a969712cb9d

          SHA512

          a5705ae52ffde84bbd90d6335f23ffccaccbde9b2e75d2462216662a60cf6a178a6a7f2b318975fd77d05ffc1746c357fc85c717fa2aa20cb480e452e9c5463b

        • memory/572-66-0x000007FEFC441000-0x000007FEFC443000-memory.dmp
          Filesize

          8KB

        • memory/760-77-0x0000000000900000-0x0000000000993000-memory.dmp
          Filesize

          588KB

        • memory/760-76-0x0000000002100000-0x0000000002403000-memory.dmp
          Filesize

          3.0MB

        • memory/1156-74-0x0000000000400000-0x000000000042F000-memory.dmp
          Filesize

          188KB

        • memory/1156-72-0x0000000000400000-0x000000000042F000-memory.dmp
          Filesize

          188KB

        • memory/1156-73-0x0000000000400000-0x000000000042F000-memory.dmp
          Filesize

          188KB

        • memory/1248-78-0x0000000006B90000-0x0000000006C73000-memory.dmp
          Filesize

          908KB

        • memory/1696-79-0x000000005FFF0000-0x0000000060000000-memory.dmp
          Filesize

          64KB

        • memory/1696-57-0x0000000076001000-0x0000000076003000-memory.dmp
          Filesize

          8KB

        • memory/1696-55-0x0000000070A61000-0x0000000070A63000-memory.dmp
          Filesize

          8KB

        • memory/1696-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
          Filesize

          64KB

        • memory/1696-54-0x0000000072FE1000-0x0000000072FE4000-memory.dmp
          Filesize

          12KB

        • memory/1832-67-0x00000000052D0000-0x000000000533A000-memory.dmp
          Filesize

          424KB

        • memory/1832-65-0x00000000004D0000-0x00000000004DC000-memory.dmp
          Filesize

          48KB

        • memory/1832-64-0x00000000005C0000-0x00000000005C1000-memory.dmp
          Filesize

          4KB

        • memory/1832-62-0x00000000002A0000-0x000000000030A000-memory.dmp
          Filesize

          424KB