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Analysis

  • max time kernel
    187s
  • max time network
    192s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/12/2022, 01:59

General

  • Target

    b0f76e340b6503aef5b1878bd20d104b0c246af7eab9e644937cceb7e3e93b48.dll

  • Size

    139KB

  • MD5

    b3dfd0a4e19d54be103773ec96de3bd0

  • SHA1

    9c9f2d31fa8f844a2b2fc7604f74b4f56fe99292

  • SHA256

    b0f76e340b6503aef5b1878bd20d104b0c246af7eab9e644937cceb7e3e93b48

  • SHA512

    1ce1ea21d9517e208579e2fd8e4c8fcee5c42af35f902855b74997d8d17cbc26f6272903d6dc4daafd9725413c677c0d0c1bc4da22d8793787e19294acb8bd25

  • SSDEEP

    3072:BFVpKlgNfbGQ+9NR6veyFyEwgTyJnc6QkDzbb1+0Mm2:PPKO4R8eydyJnfQk3sJm2

Malware Config

Signatures

  • Ramnit

    Ramnit is a versatile family that holds viruses, worms, and Trojans.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 1 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Loads dropped DLL 1 IoCs
  • Drops file in System32 directory 1 IoCs
  • Program crash 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\b0f76e340b6503aef5b1878bd20d104b0c246af7eab9e644937cceb7e3e93b48.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1180
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\b0f76e340b6503aef5b1878bd20d104b0c246af7eab9e644937cceb7e3e93b48.dll,#1
      2⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:2908
      • C:\Windows\SysWOW64\rundll32mgr.exe
        C:\Windows\SysWOW64\rundll32mgr.exe
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        PID:552
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 552 -s 516
          4⤵
          • Program crash
          PID:2052
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 552 -ip 552
    1⤵
      PID:3980

    Network

    MITRE ATT&CK Matrix

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\~TM33A3.tmp

      Filesize

      1.6MB

      MD5

      4f3387277ccbd6d1f21ac5c07fe4ca68

      SHA1

      e16506f662dc92023bf82def1d621497c8ab5890

      SHA256

      767a3fc4a7a6818cdc3f0b99aaa95db694f6bcde719d2057a88b3d4df3d74fac

      SHA512

      9da199ac69e3c0d4e0c6307e0ab8178f12cc25cb2f14c3511f6b64e6e60a925c860f3263cb38353a97b55a71ef4d27f8cb7fa3cfc08e7c1a349fd8d209dfa219

    • C:\Windows\SysWOW64\rundll32mgr.exe

      Filesize

      106KB

      MD5

      fe36fb1073e6f8fa14d7250501a29aaf

      SHA1

      6c7e01278362797dabcff3e666b68227cb9af10f

      SHA256

      f34e5af97ccb3574f7d5343246138daf979bfd1f9c37590e9a41f6420ddb3bb6

      SHA512

      8584c008c5780352f634c37b7f46543a26280b57577b675f6e72185bfc1d95f771d210d799d704eceaba509ebfd2796fb43829495d5b2a568c741ad2d44f882f

    • C:\Windows\SysWOW64\rundll32mgr.exe

      Filesize

      106KB

      MD5

      fe36fb1073e6f8fa14d7250501a29aaf

      SHA1

      6c7e01278362797dabcff3e666b68227cb9af10f

      SHA256

      f34e5af97ccb3574f7d5343246138daf979bfd1f9c37590e9a41f6420ddb3bb6

      SHA512

      8584c008c5780352f634c37b7f46543a26280b57577b675f6e72185bfc1d95f771d210d799d704eceaba509ebfd2796fb43829495d5b2a568c741ad2d44f882f

    • memory/552-137-0x0000000000400000-0x000000000042A000-memory.dmp

      Filesize

      168KB

    • memory/552-138-0x0000000000580000-0x00000000005AA000-memory.dmp

      Filesize

      168KB

    • memory/552-140-0x0000000077A80000-0x0000000077C23000-memory.dmp

      Filesize

      1.6MB

    • memory/2908-133-0x0000000010000000-0x0000000010028000-memory.dmp

      Filesize

      160KB