Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220721-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-07-2022 03:39

General

  • Target

    5987fe9f952269fd60745e05998f3640516bfc8bd4a882db60683f423a2a94e8.exe

  • Size

    305KB

  • MD5

    ffa3fb48a339894ea095d4daf804011c

  • SHA1

    1d9466444dad77922aec5a800fef77b83b715c18

  • SHA256

    5987fe9f952269fd60745e05998f3640516bfc8bd4a882db60683f423a2a94e8

  • SHA512

    6327a1b44a08446a6d21a5357d833187fc575bbf570f3e324c27f8545a2f458c4fa057b88b1a0dae5fcfee0c9852f94615b011fdb5341afaab6dcde55e6bc05e

Malware Config

Extracted

Family

formbook

Version

3.8

Campaign

hx237

Decoy

repuestosmamparaselsur.com

sakai-yukiko.com

getdistrict.com

hideinplainflight.info

yamaer.com

hoosholic-boy.com

thecopenhagencopywriter.com

ledressingdescompulsives.com

xn--h3t926bkqa394a.com

nvcxr.com

zhangbin2016.com

ajsfibresolutions.net

229riverbendlane.com

gnimble.com

pichacola.com

kochang.online

fishonfellowship.com

mandarinassinpepitas.com

drinkopr.win

silverm.cloud

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 4 IoCs
  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • Executes dropped EXE 3 IoCs
  • Drops startup file 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 62 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2308
    • C:\Users\Admin\AppData\Local\Temp\5987fe9f952269fd60745e05998f3640516bfc8bd4a882db60683f423a2a94e8.exe
      "C:\Users\Admin\AppData\Local\Temp\5987fe9f952269fd60745e05998f3640516bfc8bd4a882db60683f423a2a94e8.exe"
      2⤵
      • Drops startup file
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4288
      • C:\Windows\SysWOW64\cmd.exe
        "cmd"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3648
        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cnxuoiren.exe
          "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cnxuoiren.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3688
          • C:\Windows\SysWOW64\cmd.exe
            "cmd"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:3048
            • C:\Windows\SysWOW64\reg.exe
              reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "cnxuoirenmcxcz" /d "cmd /c type "C:\Users\Admin\AppData\Local\Temp\cnxuoirenmcxcz.txt" | cmd"
              6⤵
              • Adds Run key to start application
              PID:3488
          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cnxuoiren.exe
            "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cnxuoiren.exe"
            5⤵
            • Executes dropped EXE
            PID:2648
          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cnxuoiren.exe
            "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cnxuoiren.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of AdjustPrivilegeToken
            PID:2344
    • C:\Windows\SysWOW64\cscript.exe
      "C:\Windows\SysWOW64\cscript.exe"
      2⤵
      • Adds policy Run key to start application
      • Suspicious use of SetThreadContext
      • Drops file in Program Files directory
      • Modifies Internet Explorer settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:4764
      • C:\Windows\SysWOW64\cmd.exe
        /c del "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cnxuoiren.exe"
        3⤵
          PID:3992
        • 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:4300

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      Registry Run Keys / Startup Folder

      2
      T1060

      Defense Evasion

      Modify Registry

      4
      T1112

      Credential Access

      Credentials in Files

      1
      T1081

      Collection

      Data from Local System

      1
      T1005

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\DB1
        Filesize

        40KB

        MD5

        b608d407fc15adea97c26936bc6f03f6

        SHA1

        953e7420801c76393902c0d6bb56148947e41571

        SHA256

        b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

        SHA512

        cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

      • C:\Users\Admin\AppData\Roaming\82388PD5\823logim.jpeg
        Filesize

        81KB

        MD5

        9dc3ce0b18b7f18d4df70591b9d9034c

        SHA1

        bcc3c9d9acd5b6770e06f903c77dd059fde695e6

        SHA256

        8e30324785ff1774bdee2877e8119907f6aa827884a73a2f34b5526af2833f80

        SHA512

        4575aa29138dae6bfb760e660f0e99804fb900d300c0b6555458a8052e0f3b19c55f0bc31bdce719daacffe8b2154de46ad310041c7299bcc493a69844b73c66

      • C:\Users\Admin\AppData\Roaming\82388PD5\823logrg.ini
        Filesize

        38B

        MD5

        4aadf49fed30e4c9b3fe4a3dd6445ebe

        SHA1

        1e332822167c6f351b99615eada2c30a538ff037

        SHA256

        75034beb7bded9aeab5748f4592b9e1419256caec474065d43e531ec5cc21c56

        SHA512

        eb5b3908d5e7b43ba02165e092f05578f45f15a148b4c3769036aa542c23a0f7cd2bc2770cf4119a7e437de3f681d9e398511f69f66824c516d9b451bb95f945

      • C:\Users\Admin\AppData\Roaming\82388PD5\823logri.ini
        Filesize

        40B

        MD5

        d63a82e5d81e02e399090af26db0b9cb

        SHA1

        91d0014c8f54743bba141fd60c9d963f869d76c9

        SHA256

        eaece2eba6310253249603033c744dd5914089b0bb26bde6685ec9813611baae

        SHA512

        38afb05016d8f3c69d246321573997aaac8a51c34e61749a02bf5e8b2b56b94d9544d65801511044e1495906a86dc2100f2e20ff4fcbed09e01904cc780fdbad

      • C:\Users\Admin\AppData\Roaming\82388PD5\823logrv.ini
        Filesize

        872B

        MD5

        bbc41c78bae6c71e63cb544a6a284d94

        SHA1

        33f2c1d9fa0e9c99b80bc2500621e95af38b1f9a

        SHA256

        ee83c6bcea9353c74bfc0a7e739f3c4a765ace894470e09cdcdebba700b8d4cb

        SHA512

        0aea424b57adae3e14ad6491cab585f554b4dffe601b5a17bad6ee6177d2f0f995e419cde576e2d1782b9bddc0661aada11a2c9f1454ae625d9e3223635ec9f4

      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cnxuoiren.exe
        Filesize

        305KB

        MD5

        ffa3fb48a339894ea095d4daf804011c

        SHA1

        1d9466444dad77922aec5a800fef77b83b715c18

        SHA256

        5987fe9f952269fd60745e05998f3640516bfc8bd4a882db60683f423a2a94e8

        SHA512

        6327a1b44a08446a6d21a5357d833187fc575bbf570f3e324c27f8545a2f458c4fa057b88b1a0dae5fcfee0c9852f94615b011fdb5341afaab6dcde55e6bc05e

      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cnxuoiren.exe
        Filesize

        305KB

        MD5

        ffa3fb48a339894ea095d4daf804011c

        SHA1

        1d9466444dad77922aec5a800fef77b83b715c18

        SHA256

        5987fe9f952269fd60745e05998f3640516bfc8bd4a882db60683f423a2a94e8

        SHA512

        6327a1b44a08446a6d21a5357d833187fc575bbf570f3e324c27f8545a2f458c4fa057b88b1a0dae5fcfee0c9852f94615b011fdb5341afaab6dcde55e6bc05e

      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cnxuoiren.exe
        Filesize

        305KB

        MD5

        ffa3fb48a339894ea095d4daf804011c

        SHA1

        1d9466444dad77922aec5a800fef77b83b715c18

        SHA256

        5987fe9f952269fd60745e05998f3640516bfc8bd4a882db60683f423a2a94e8

        SHA512

        6327a1b44a08446a6d21a5357d833187fc575bbf570f3e324c27f8545a2f458c4fa057b88b1a0dae5fcfee0c9852f94615b011fdb5341afaab6dcde55e6bc05e

      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cnxuoiren.exe
        Filesize

        305KB

        MD5

        ffa3fb48a339894ea095d4daf804011c

        SHA1

        1d9466444dad77922aec5a800fef77b83b715c18

        SHA256

        5987fe9f952269fd60745e05998f3640516bfc8bd4a882db60683f423a2a94e8

        SHA512

        6327a1b44a08446a6d21a5357d833187fc575bbf570f3e324c27f8545a2f458c4fa057b88b1a0dae5fcfee0c9852f94615b011fdb5341afaab6dcde55e6bc05e

      • memory/2308-158-0x0000000008FA0000-0x000000000910C000-memory.dmp
        Filesize

        1.4MB

      • memory/2308-148-0x0000000008A60000-0x0000000008BD6000-memory.dmp
        Filesize

        1.5MB

      • memory/2308-156-0x0000000008FA0000-0x000000000910C000-memory.dmp
        Filesize

        1.4MB

      • memory/2344-150-0x0000000000400000-0x000000000042A000-memory.dmp
        Filesize

        168KB

      • memory/2344-141-0x0000000000000000-mapping.dmp
      • memory/2344-142-0x0000000000400000-0x000000000042A000-memory.dmp
        Filesize

        168KB

      • memory/2344-146-0x0000000000FB0000-0x00000000012FA000-memory.dmp
        Filesize

        3.3MB

      • memory/2344-147-0x0000000000E70000-0x0000000000E84000-memory.dmp
        Filesize

        80KB

      • memory/2648-139-0x0000000000000000-mapping.dmp
      • memory/3048-137-0x0000000000000000-mapping.dmp
      • memory/3488-138-0x0000000000000000-mapping.dmp
      • memory/3648-130-0x0000000000000000-mapping.dmp
      • memory/3688-131-0x0000000000000000-mapping.dmp
      • memory/3688-136-0x00000000751D0000-0x0000000075781000-memory.dmp
        Filesize

        5.7MB

      • memory/3688-144-0x00000000751D0000-0x0000000075781000-memory.dmp
        Filesize

        5.7MB

      • memory/3992-153-0x0000000000000000-mapping.dmp
      • memory/4288-132-0x00000000751D0000-0x0000000075781000-memory.dmp
        Filesize

        5.7MB

      • memory/4288-135-0x00000000751D0000-0x0000000075781000-memory.dmp
        Filesize

        5.7MB

      • memory/4300-159-0x0000000000000000-mapping.dmp
      • memory/4764-154-0x0000000002500000-0x000000000284A000-memory.dmp
        Filesize

        3.3MB

      • memory/4764-157-0x00000000001B0000-0x00000000001DA000-memory.dmp
        Filesize

        168KB

      • memory/4764-149-0x0000000000000000-mapping.dmp
      • memory/4764-155-0x0000000002370000-0x0000000002403000-memory.dmp
        Filesize

        588KB

      • memory/4764-151-0x0000000000500000-0x0000000000527000-memory.dmp
        Filesize

        156KB

      • memory/4764-152-0x00000000001B0000-0x00000000001DA000-memory.dmp
        Filesize

        168KB