Analysis

  • max time kernel
    91s
  • max time network
    137s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08-01-2025 01:17

General

  • Target

    639b8eaeeb124a1f4da349397791935cfba483f828d8315b2da8fa869dd5c997.dll

  • Size

    841KB

  • MD5

    9fa73c79d66c1aaf541f9d4478a6a2ca

  • SHA1

    0be38305594e338e36da1e8f4901c87bafa24091

  • SHA256

    639b8eaeeb124a1f4da349397791935cfba483f828d8315b2da8fa869dd5c997

  • SHA512

    e02bffa2b6d471e2e6c6c55f0ff2e8655d4f741061088b011c18a45931808602530cee97a486a643fca6234ee9037fe1a7938da81e596dfd4f50751f3d6303ff

  • SSDEEP

    3072:jDKpt9sSR0HUHPwZWLnWVfEAzV2IJIwTBftpmc+z+f3Q01:jDgtfRQUHPw06MoV2nwTBlhm8N

Malware Config

Signatures

  • Yunsip

    Remote backdoor which communicates with a C2 server to receive commands.

  • Yunsip family
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\639b8eaeeb124a1f4da349397791935cfba483f828d8315b2da8fa869dd5c997.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:336
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\639b8eaeeb124a1f4da349397791935cfba483f828d8315b2da8fa869dd5c997.dll,#1
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3136

Network

MITRE ATT&CK Enterprise v15

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