Analysis

  • max time kernel
    117s
  • max time network
    128s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    27/10/2023, 11:04

General

  • Target

    PDF247791026727441.js

  • Size

    1.1MB

  • MD5

    c41b0c8acc549b2356e6a0ef252955e8

  • SHA1

    21e762814c7fad20f4c40b9c8a96cc5c4e92b096

  • SHA256

    64069ffa43a427fb63754153895054ece510e28adc6485d59d62a52a0a83539b

  • SHA512

    7f018455048bf53a71f3dd15334fb6f07ba5f03f59be0f6b6296a1d18f471af9916f57115b3fe84445e10b07ed644939afd8897e1538aa7c113e29a442fe4a72

  • SSDEEP

    24576:3shJIALBa0nNM/1ZM1LnlJsa/peyYrn65H28izN27D:R8D

Score
10/10

Malware Config

Extracted

Family

strela

C2

91.215.85.209

Signatures

  • Strela

    An info stealer targeting mail credentials first seen in late 2022.

  • Loads dropped DLL 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\PDF247791026727441.js
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1968
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /k copy "C:\Users\Admin\AppData\Local\Temp\PDF247791026727441.js" "C:\Users\Admin\AppData\Local\Temp\\pnuicfpusbibgcnasijrcejkvapintqfmdzfkkbxqiikjfqleh.bat" && "C:\Users\Admin\AppData\Local\Temp\\pnuicfpusbibgcnasijrcejkvapintqfmdzfkkbxqiikjfqleh.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1108
      • C:\Windows\system32\findstr.exe
        findstr /V dwxhhghdszkwxfyzjjjbfasobxdivpofqrabxdjslzwladvmtu ""C:\Users\Admin\AppData\Local\Temp\\pnuicfpusbibgcnasijrcejkvapintqfmdzfkkbxqiikjfqleh.bat""
        3⤵
          PID:2700
        • C:\Windows\system32\certutil.exe
          certutil -f -decode ydehnrtmtaxivskgglhryiuutrxcsrpkzqcstwyelzxxzmxtxc iiwirxhqdzahhemwawhlgzvhaeojmmujuaajzhmfanrbnobzlv.dll
          3⤵
            PID:2876
          • C:\Windows\system32\rundll32.exe
            rundll32 iiwirxhqdzahhemwawhlgzvhaeojmmujuaajzhmfanrbnobzlv.dll,x
            3⤵
            • Loads dropped DLL
            PID:2600

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\iiwirxhqdzahhemwawhlgzvhaeojmmujuaajzhmfanrbnobzlv.dll

        Filesize

        791KB

        MD5

        eaf3750d024b66e57d731ecd3eb4d6c2

        SHA1

        7f70594c99523d1e25e11424762d7b5f5adc6f43

        SHA256

        7a4d34794aa0fd9b70bed2a9446bd060496f31e1ee52084a4c0c08ce1f1346b6

        SHA512

        45de48b7b4c59e96ba1422a2bfa68d138f4f63e1ae3e125e3880022504fe60c72a8f14047d015be953f3aad13be0a4ea99178d7525af9d8baf7de1c232d862de

      • C:\Users\Admin\AppData\Local\Temp\pnuicfpusbibgcnasijrcejkvapintqfmdzfkkbxqiikjfqleh.bat

        Filesize

        1.1MB

        MD5

        c41b0c8acc549b2356e6a0ef252955e8

        SHA1

        21e762814c7fad20f4c40b9c8a96cc5c4e92b096

        SHA256

        64069ffa43a427fb63754153895054ece510e28adc6485d59d62a52a0a83539b

        SHA512

        7f018455048bf53a71f3dd15334fb6f07ba5f03f59be0f6b6296a1d18f471af9916f57115b3fe84445e10b07ed644939afd8897e1538aa7c113e29a442fe4a72

      • C:\Users\Admin\AppData\Local\Temp\pnuicfpusbibgcnasijrcejkvapintqfmdzfkkbxqiikjfqleh.bat

        Filesize

        1.1MB

        MD5

        c41b0c8acc549b2356e6a0ef252955e8

        SHA1

        21e762814c7fad20f4c40b9c8a96cc5c4e92b096

        SHA256

        64069ffa43a427fb63754153895054ece510e28adc6485d59d62a52a0a83539b

        SHA512

        7f018455048bf53a71f3dd15334fb6f07ba5f03f59be0f6b6296a1d18f471af9916f57115b3fe84445e10b07ed644939afd8897e1538aa7c113e29a442fe4a72

      • C:\Users\Admin\AppData\Local\Temp\ydehnrtmtaxivskgglhryiuutrxcsrpkzqcstwyelzxxzmxtxc

        Filesize

        1.0MB

        MD5

        bb8e896461540afc2b9c2267f2589536

        SHA1

        d53dd7d0fbd78cd40fdacca15c43ddcd87b593f3

        SHA256

        29a79976e3fd2c26fa3f572a5838768375796946ddca4ac0e0c4aef5e2f9b26a

        SHA512

        61900661ddc5c5fa2f3236a04884044c13d2ac28511f4bfd61013f9f63811b795187a3bec83d71459db17c553bee8ec81ae82944819aeeada4d43750505a8e34

      • \Users\Admin\AppData\Local\Temp\iiwirxhqdzahhemwawhlgzvhaeojmmujuaajzhmfanrbnobzlv.dll

        Filesize

        791KB

        MD5

        eaf3750d024b66e57d731ecd3eb4d6c2

        SHA1

        7f70594c99523d1e25e11424762d7b5f5adc6f43

        SHA256

        7a4d34794aa0fd9b70bed2a9446bd060496f31e1ee52084a4c0c08ce1f1346b6

        SHA512

        45de48b7b4c59e96ba1422a2bfa68d138f4f63e1ae3e125e3880022504fe60c72a8f14047d015be953f3aad13be0a4ea99178d7525af9d8baf7de1c232d862de

      • \Users\Admin\AppData\Local\Temp\iiwirxhqdzahhemwawhlgzvhaeojmmujuaajzhmfanrbnobzlv.dll

        Filesize

        791KB

        MD5

        eaf3750d024b66e57d731ecd3eb4d6c2

        SHA1

        7f70594c99523d1e25e11424762d7b5f5adc6f43

        SHA256

        7a4d34794aa0fd9b70bed2a9446bd060496f31e1ee52084a4c0c08ce1f1346b6

        SHA512

        45de48b7b4c59e96ba1422a2bfa68d138f4f63e1ae3e125e3880022504fe60c72a8f14047d015be953f3aad13be0a4ea99178d7525af9d8baf7de1c232d862de

      • \Users\Admin\AppData\Local\Temp\iiwirxhqdzahhemwawhlgzvhaeojmmujuaajzhmfanrbnobzlv.dll

        Filesize

        791KB

        MD5

        eaf3750d024b66e57d731ecd3eb4d6c2

        SHA1

        7f70594c99523d1e25e11424762d7b5f5adc6f43

        SHA256

        7a4d34794aa0fd9b70bed2a9446bd060496f31e1ee52084a4c0c08ce1f1346b6

        SHA512

        45de48b7b4c59e96ba1422a2bfa68d138f4f63e1ae3e125e3880022504fe60c72a8f14047d015be953f3aad13be0a4ea99178d7525af9d8baf7de1c232d862de

      • \Users\Admin\AppData\Local\Temp\iiwirxhqdzahhemwawhlgzvhaeojmmujuaajzhmfanrbnobzlv.dll

        Filesize

        791KB

        MD5

        eaf3750d024b66e57d731ecd3eb4d6c2

        SHA1

        7f70594c99523d1e25e11424762d7b5f5adc6f43

        SHA256

        7a4d34794aa0fd9b70bed2a9446bd060496f31e1ee52084a4c0c08ce1f1346b6

        SHA512

        45de48b7b4c59e96ba1422a2bfa68d138f4f63e1ae3e125e3880022504fe60c72a8f14047d015be953f3aad13be0a4ea99178d7525af9d8baf7de1c232d862de

      • memory/2600-44-0x000000006D7C0000-0x000000006D88E000-memory.dmp

        Filesize

        824KB

      • memory/2600-45-0x0000000000100000-0x0000000000121000-memory.dmp

        Filesize

        132KB