Analysis

  • max time kernel
    44s
  • max time network
    49s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    16-06-2022 12:24

General

  • Target

    1909dc145d81df639d4ad06a8b0b9933.exe

  • Size

    372KB

  • MD5

    1909dc145d81df639d4ad06a8b0b9933

  • SHA1

    6021d97bd1b948cd072aa02a946999519225369f

  • SHA256

    30bb0e3893bd496f910db1ef709cf766e1277e0b097363798acd32e2a13fb92d

  • SHA512

    df35908ae1e731df25c6764f4d23da0f53396d40951d2ef96e64f3e94f0dea791cc97187473a943326055e612d1e489eceb0898282ee8f49c290f2a99e1cde06

Score
10/10

Malware Config

Extracted

Family

nymaim

C2

37.0.8.39

31.210.20.149

212.192.241.16

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\1909dc145d81df639d4ad06a8b0b9933.exe
    "C:\Users\Admin\AppData\Local\Temp\1909dc145d81df639d4ad06a8b0b9933.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1808
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "1909dc145d81df639d4ad06a8b0b9933.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\1909dc145d81df639d4ad06a8b0b9933.exe" & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1152
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "1909dc145d81df639d4ad06a8b0b9933.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:1264

Network

MITRE ATT&CK Matrix ATT&CK v6

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1152-56-0x0000000000000000-mapping.dmp
  • memory/1264-60-0x0000000000000000-mapping.dmp
  • memory/1808-54-0x0000000075BD1000-0x0000000075BD3000-memory.dmp
    Filesize

    8KB

  • memory/1808-55-0x0000000000CCB000-0x0000000000CF1000-memory.dmp
    Filesize

    152KB

  • memory/1808-58-0x0000000000CCB000-0x0000000000CF1000-memory.dmp
    Filesize

    152KB

  • memory/1808-57-0x0000000000250000-0x000000000028F000-memory.dmp
    Filesize

    252KB

  • memory/1808-59-0x0000000000400000-0x0000000000B50000-memory.dmp
    Filesize

    7.3MB