Analysis

  • max time kernel
    43s
  • max time network
    45s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    23/12/2022, 04:22

General

  • Target

    cc58143048294ff5fd4eb525b9af83bd.exe

  • Size

    385KB

  • MD5

    cc58143048294ff5fd4eb525b9af83bd

  • SHA1

    10c859ebdd0207d13a4b07d62a5b1df9ba447502

  • SHA256

    43209724f0bd10e551388117ec98e9b22a296537b1c1eb6f6bc2b35239e63544

  • SHA512

    8e385d7cbf4f7fe55732a194456c56398b1c93d8271ac8c767a361f57e0e0b754b972f64acba710a0b20937a62fab2dadbde8e08b925c5f441307b541851e35c

  • SSDEEP

    6144:CGpL5+6yz3wmdCSBV4TbDX1gYd6jt8p4RR0cSpQTtyzsduHNIv:Bp9+6yzgJbZgbt8p4RR0TCtyYduHNI

Score
10/10

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

  • NyMaim

    NyMaim is a malware with various capabilities written in C++ and first seen in 2013.

  • Deletes itself 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cc58143048294ff5fd4eb525b9af83bd.exe
    "C:\Users\Admin\AppData\Local\Temp\cc58143048294ff5fd4eb525b9af83bd.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:816
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "cc58143048294ff5fd4eb525b9af83bd.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\cc58143048294ff5fd4eb525b9af83bd.exe" & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1932
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "cc58143048294ff5fd4eb525b9af83bd.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:1264

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/816-54-0x0000000075DF1000-0x0000000075DF3000-memory.dmp

          Filesize

          8KB

        • memory/816-55-0x000000000057C000-0x00000000005A2000-memory.dmp

          Filesize

          152KB

        • memory/816-57-0x0000000000400000-0x0000000000466000-memory.dmp

          Filesize

          408KB

        • memory/816-56-0x0000000000320000-0x0000000000360000-memory.dmp

          Filesize

          256KB

        • memory/816-59-0x000000000057C000-0x00000000005A2000-memory.dmp

          Filesize

          152KB

        • memory/816-60-0x0000000000400000-0x0000000000466000-memory.dmp

          Filesize

          408KB