Analysis

  • max time kernel
    99s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    05-04-2023 11:03

General

  • Target

    47fb3f47c7d8d30d6bc605805e10fa9c60af5c0516b93e475c030da9144a715d.exe

  • Size

    23KB

  • MD5

    4a5b45207512b2f4ee3bd8cd7a25ba9e

  • SHA1

    2700be565b25a627c86adf20798e90e99958a3ea

  • SHA256

    47fb3f47c7d8d30d6bc605805e10fa9c60af5c0516b93e475c030da9144a715d

  • SHA512

    a1e26da024c534083fde7dee2846973489ceb06c536a751bde47fa74977efe5ab3762bd8f82bc427800eb43ee9e56064dcbd755d00454c2be112cdd04eb2e4ce

  • SSDEEP

    384:YbrFmwPzQHzVZJq/S8frSo62tCT+UuSvwiFawG:Ah2HzIfrS8fiFa/

Malware Config

Extracted

Family

purecrypter

C2

https://onedrive.live.com/download?cid=BD9480D014FE52E5&resid=BD9480D014FE52E5%21385&authkey=AB7WYGSbxFgcTyw

Signatures

  • PureCrypter

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

  • Program crash 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\47fb3f47c7d8d30d6bc605805e10fa9c60af5c0516b93e475c030da9144a715d.exe
    "C:\Users\Admin\AppData\Local\Temp\47fb3f47c7d8d30d6bc605805e10fa9c60af5c0516b93e475c030da9144a715d.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2036 -s 1060
      2⤵
      • Program crash
      PID:1820

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
    Filesize

    61KB

    MD5

    e71c8443ae0bc2e282c73faead0a6dd3

    SHA1

    0c110c1b01e68edfacaeae64781a37b1995fa94b

    SHA256

    95b0a5acc5bf70d3abdfd091d0c9f9063aa4fde65bd34dbf16786082e1992e72

    SHA512

    b38458c7fa2825afb72794f374827403d5946b1132e136a0ce075dfd351277cf7d957c88dc8a1e4adc3bcae1fa8010dae3831e268e910d517691de24326391a6

  • C:\Users\Admin\AppData\Local\Temp\Tar37CB.tmp
    Filesize

    161KB

    MD5

    be2bec6e8c5653136d3e72fe53c98aa3

    SHA1

    a8182d6db17c14671c3d5766c72e58d87c0810de

    SHA256

    1919aab2a820642490169bdc4e88bd1189e22f83e7498bf8ebdfb62ec7d843fd

    SHA512

    0d1424ccdf0d53faf3f4e13d534e12f22388648aa4c23edbc503801e3c96b7f73c7999b760b5bef4b5e9dd923dffe21a21889b1ce836dd428420bf0f4f5327ff

  • memory/2036-54-0x0000000001280000-0x000000000128C000-memory.dmp
    Filesize

    48KB

  • memory/2036-55-0x0000000000560000-0x00000000005A0000-memory.dmp
    Filesize

    256KB

  • memory/2036-113-0x0000000000560000-0x00000000005A0000-memory.dmp
    Filesize

    256KB