Analysis

  • max time kernel
    150s
  • max time network
    138s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    28-09-2021 02:12

General

  • Target

    OBL PN210700369.doc

  • Size

    15KB

  • MD5

    ee6900ee7f29ffb8b1c5f5b9a8a117d0

  • SHA1

    74501f04465f268c3f2bfea3b371118fe25b6aed

  • SHA256

    135dedf906bbb8eef7aef3b5966f1b933e65725cef80e653031481feb7351d62

  • SHA512

    a03958a61cc9cfa8e8a35909b3c29f8d51d1c012bba5ccb2c7d0c2b80f0f77ae42ff25f51f2e4fa5c9ccacad17be5658ad64a8e2cd64d34d2b2aa444ac2ddbfb

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

ed9s

C2

http://www.vaughnmethod.com/ed9s/

Decoy

pocketoptioniraq.com

merabestsolutions.com

atelectronics.site

fuxueshi.net

infinitystay.com

forensicconcept.site

txpmachine.com

masterwhs.xyz

dia-gnwsis.art

fulltiltnodes.com

bigbnbbsc.com

formation-figma.com

bonanacroin.net

medicalmarijuanasatx.com

bagnavy.com

aaegiscares.net

presentationpublicschool.com

bestyousite.site

prescriptionn.com

beyondthenormbouquets.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)

  • Formbook Payload 3 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Suspicious use of SetThreadContext 3 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 19 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1404
    • 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\OBL PN210700369.doc"
      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:1532
      • C:\Windows\splwow64.exe
        C:\Windows\splwow64.exe 12288
        3⤵
          PID:1172
      • C:\Windows\SysWOW64\wlanext.exe
        "C:\Windows\SysWOW64\wlanext.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1616
        • C:\Windows\SysWOW64\cmd.exe
          /c del "C:\Users\Admin\AppData\Roaming\obinnamaxdw2962.exe"
          3⤵
            PID:1080
      • 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:1772
        • C:\Users\Admin\AppData\Roaming\obinnamaxdw2962.exe
          "C:\Users\Admin\AppData\Roaming\obinnamaxdw2962.exe"
          2⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:636
          • C:\Users\Admin\AppData\Roaming\obinnamaxdw2962.exe
            "C:\Users\Admin\AppData\Roaming\obinnamaxdw2962.exe"
            3⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of AdjustPrivilegeToken
            PID:1492

      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\obinnamaxdw2962.exe
        MD5

        cee3c4065c5cb9237b7ebe5c1b3ecea5

        SHA1

        cad24ea1953a5194ed945cfefcdb383300d27b14

        SHA256

        972f5e016ffc306524d7083a5a5058ba8b5fc60f3db9f3c0915db59c0523a487

        SHA512

        8d575fc8339a0488aa2ff94bc054ea0ffd15bacf0d56c41a6b085d100dbda2c3c2884393fbd9dc9435815518e5518f110e0112aa3c23450e636f74406ae190d6

      • C:\Users\Admin\AppData\Roaming\obinnamaxdw2962.exe
        MD5

        cee3c4065c5cb9237b7ebe5c1b3ecea5

        SHA1

        cad24ea1953a5194ed945cfefcdb383300d27b14

        SHA256

        972f5e016ffc306524d7083a5a5058ba8b5fc60f3db9f3c0915db59c0523a487

        SHA512

        8d575fc8339a0488aa2ff94bc054ea0ffd15bacf0d56c41a6b085d100dbda2c3c2884393fbd9dc9435815518e5518f110e0112aa3c23450e636f74406ae190d6

      • C:\Users\Admin\AppData\Roaming\obinnamaxdw2962.exe
        MD5

        cee3c4065c5cb9237b7ebe5c1b3ecea5

        SHA1

        cad24ea1953a5194ed945cfefcdb383300d27b14

        SHA256

        972f5e016ffc306524d7083a5a5058ba8b5fc60f3db9f3c0915db59c0523a487

        SHA512

        8d575fc8339a0488aa2ff94bc054ea0ffd15bacf0d56c41a6b085d100dbda2c3c2884393fbd9dc9435815518e5518f110e0112aa3c23450e636f74406ae190d6

      • \Users\Admin\AppData\Roaming\obinnamaxdw2962.exe
        MD5

        cee3c4065c5cb9237b7ebe5c1b3ecea5

        SHA1

        cad24ea1953a5194ed945cfefcdb383300d27b14

        SHA256

        972f5e016ffc306524d7083a5a5058ba8b5fc60f3db9f3c0915db59c0523a487

        SHA512

        8d575fc8339a0488aa2ff94bc054ea0ffd15bacf0d56c41a6b085d100dbda2c3c2884393fbd9dc9435815518e5518f110e0112aa3c23450e636f74406ae190d6

      • memory/636-69-0x0000000000CF0000-0x0000000000D25000-memory.dmp
        Filesize

        212KB

      • memory/636-68-0x0000000007F20000-0x0000000007F84000-memory.dmp
        Filesize

        400KB

      • memory/636-59-0x0000000000000000-mapping.dmp
      • memory/636-62-0x0000000001210000-0x0000000001211000-memory.dmp
        Filesize

        4KB

      • memory/636-64-0x0000000000A20000-0x0000000000A21000-memory.dmp
        Filesize

        4KB

      • memory/636-65-0x0000000000420000-0x0000000000427000-memory.dmp
        Filesize

        28KB

      • memory/1080-79-0x0000000000000000-mapping.dmp
      • memory/1172-66-0x0000000000000000-mapping.dmp
      • memory/1172-67-0x000007FEFBA11000-0x000007FEFBA13000-memory.dmp
        Filesize

        8KB

      • memory/1404-75-0x0000000006FC0000-0x00000000070E5000-memory.dmp
        Filesize

        1.1MB

      • memory/1404-82-0x0000000007AC0000-0x0000000007BAD000-memory.dmp
        Filesize

        948KB

      • memory/1492-74-0x0000000000290000-0x00000000002A4000-memory.dmp
        Filesize

        80KB

      • memory/1492-70-0x0000000000400000-0x000000000042F000-memory.dmp
        Filesize

        188KB

      • memory/1492-71-0x000000000041F160-mapping.dmp
      • memory/1492-73-0x00000000008F0000-0x0000000000BF3000-memory.dmp
        Filesize

        3.0MB

      • memory/1532-54-0x0000000070031000-0x0000000070033000-memory.dmp
        Filesize

        8KB

      • memory/1532-53-0x00000000725B1000-0x00000000725B4000-memory.dmp
        Filesize

        12KB

      • memory/1532-55-0x000000005FFF0000-0x0000000060000000-memory.dmp
        Filesize

        64KB

      • memory/1532-56-0x00000000751D1000-0x00000000751D3000-memory.dmp
        Filesize

        8KB

      • memory/1532-83-0x000000005FFF0000-0x0000000060000000-memory.dmp
        Filesize

        64KB

      • memory/1616-76-0x0000000000000000-mapping.dmp
      • memory/1616-78-0x0000000000080000-0x00000000000AF000-memory.dmp
        Filesize

        188KB

      • memory/1616-77-0x0000000000870000-0x0000000000886000-memory.dmp
        Filesize

        88KB

      • memory/1616-80-0x0000000001E20000-0x0000000002123000-memory.dmp
        Filesize

        3.0MB

      • memory/1616-81-0x0000000002130000-0x00000000021C3000-memory.dmp
        Filesize

        588KB