Analysis

  • max time kernel
    120s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    20-02-2024 22:33

General

  • Target

    fb2b2475b815a90a26002e2d0e264b1d5e18b0b76b4911a0ad68783e20a69840.exe

  • Size

    6KB

  • MD5

    b07d1f0141275eb6b6e35e948a5f63f1

  • SHA1

    b047666885d54a5f59fa8dc3dd17d1097d3ae12b

  • SHA256

    fb2b2475b815a90a26002e2d0e264b1d5e18b0b76b4911a0ad68783e20a69840

  • SHA512

    c9e3dc67c81aa5da8724f29afec24a1ebac8e01d655acc8a5a4ea1efc01f094d3c8e115b127d1154308fdfc4c8da7f13a5b046e829153ee0ea561ec4d9a4ac22

  • SSDEEP

    48:6a/UR7UC1rg7fpJfzw+2sF3YSFEO0IRC+ebPQKwb565VARX54tiOlXItqFDvpfbi:Yggrg7fm4oPIRCRsnbsVAYlI+BzNt

Malware Config

Extracted

Family

purecrypter

C2

http://80.66.76.30/Eryyhcchii.vdf

Signatures

  • PureCrypter

    PureCrypter is a .NET malware loader first seen in early 2021.

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fb2b2475b815a90a26002e2d0e264b1d5e18b0b76b4911a0ad68783e20a69840.exe
    "C:\Users\Admin\AppData\Local\Temp\fb2b2475b815a90a26002e2d0e264b1d5e18b0b76b4911a0ad68783e20a69840.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2816
    • C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 2816 -s 984
      2⤵
        PID:3048

    Network

    MITRE ATT&CK Matrix

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/2816-0-0x0000000000A00000-0x0000000000A08000-memory.dmp

      Filesize

      32KB

    • memory/2816-1-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp

      Filesize

      9.9MB

    • memory/2816-2-0x000000001B620000-0x000000001B6A0000-memory.dmp

      Filesize

      512KB

    • memory/2816-3-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp

      Filesize

      9.9MB

    • memory/2816-4-0x000000001B620000-0x000000001B6A0000-memory.dmp

      Filesize

      512KB