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Analysis

  • max time kernel
    38s
  • max time network
    42s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    09/06/2022, 14:42

General

  • Target

    MIXONE.exe

  • Size

    268KB

  • MD5

    27dc719db81a482a554dfa94992c53fe

  • SHA1

    61ab59cc71f745afa1c4668ffba8253b4b2b52d6

  • SHA256

    90c0e76b7fee7b989428081fb1a754f45c3c0bee42131a03dbb1450d370dd793

  • SHA512

    9ef986d23b4b9a3dc7d4eb0f1c5f819fb41938df35c512ec57fdfda49be2c58a7ad503165f3475d93f470b2bbd1afc1bddff56ba2139f3706643b01056514c95

Malware Config

Extracted

Family

arkei

Botnet

Default

Signatures

  • Arkei

    Arkei is an infostealer written in C++.

  • suricata: ET MALWARE Win32/Vidar Variant/Mars CnC Activity (GET)

    suricata: ET MALWARE Win32/Vidar Variant/Mars CnC Activity (GET)

  • suricata: ET MALWARE Win32/Vidar Variant/Mars Stealer CnC Exfil

    suricata: ET MALWARE Win32/Vidar Variant/Mars Stealer CnC Exfil

  • Deletes itself 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • 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\MIXONE.exe
    "C:\Users\Admin\AppData\Local\Temp\MIXONE.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:1704
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\MIXONE.exe" & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1440
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:1824

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • \ProgramData\mozglue.dll

    Filesize

    133KB

    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll

    Filesize

    1.2MB

    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/1704-55-0x00000000001B0000-0x00000000001D9000-memory.dmp

    Filesize

    164KB

  • memory/1704-54-0x00000000002CE000-0x00000000002EF000-memory.dmp

    Filesize

    132KB

  • memory/1704-56-0x0000000000400000-0x000000000090D000-memory.dmp

    Filesize

    5.1MB

  • memory/1704-57-0x00000000755B1000-0x00000000755B3000-memory.dmp

    Filesize

    8KB

  • memory/1704-58-0x0000000060900000-0x0000000060992000-memory.dmp

    Filesize

    584KB

  • memory/1704-80-0x00000000002CE000-0x00000000002EF000-memory.dmp

    Filesize

    132KB

  • memory/1704-81-0x0000000000400000-0x000000000090D000-memory.dmp

    Filesize

    5.1MB