Analysis

  • max time kernel
    120s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-en-20211014
  • submitted
    23-11-2021 09:05

General

  • Target

    c7387f1ae36b2649856c5077edb63e70.exe

  • Size

    374KB

  • MD5

    c7387f1ae36b2649856c5077edb63e70

  • SHA1

    27163fe328de1b1fdbc3018c447f68ebb0dc9776

  • SHA256

    c3315d1c3860a9a019c4693680a9d4522a81f3cc804aef5fbb760048401a44af

  • SHA512

    138507b8e112c150ddcd576e9e0b979304cda1e832dc565162f6b95ebcf76dfe13af8d55a9896f4b562e29732788871e77f6355f653acbc3ef56749bed98016d

Malware Config

Extracted

Family

cryptbot

C2

daqsml22.top

morkjm02.top

Attributes
  • payload_url

    http://mywmis14.top/download.php?file=kumasi.exe

Signatures

  • CryptBot

    A C++ stealer distributed widely in bundle with other software.

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

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c7387f1ae36b2649856c5077edb63e70.exe
    "C:\Users\Admin\AppData\Local\Temp\c7387f1ae36b2649856c5077edb63e70.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:560
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\YvTghLyLKXTq & timeout 4 & del /f /q "C:\Users\Admin\AppData\Local\Temp\c7387f1ae36b2649856c5077edb63e70.exe"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1164
      • C:\Windows\SysWOW64\timeout.exe
        timeout 4
        3⤵
        • Delays execution with timeout.exe
        PID:528

Network

MITRE ATT&CK Matrix ATT&CK v6

Discovery

System Information Discovery

2
T1082

Query Registry

1
T1012

Replay Monitor

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Downloads

  • memory/528-60-0x0000000000000000-mapping.dmp
  • memory/560-55-0x000000000028B000-0x00000000002B1000-memory.dmp
    Filesize

    152KB

  • memory/560-56-0x0000000075321000-0x0000000075323000-memory.dmp
    Filesize

    8KB

  • memory/560-57-0x0000000002B60000-0x0000000002BA5000-memory.dmp
    Filesize

    276KB

  • memory/560-58-0x0000000000400000-0x0000000002B56000-memory.dmp
    Filesize

    39.3MB

  • memory/1164-59-0x0000000000000000-mapping.dmp