Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-en-20211104
  • submitted
    25-11-2021 16:50

General

  • Target

    3c84cce3867660912739106e235ed948.exe

  • Size

    375KB

  • MD5

    3c84cce3867660912739106e235ed948

  • SHA1

    a2236630a73791330822d68db8e1e6c4fe61b183

  • SHA256

    4ba7148fbd3d102ac4ff4da19e24130c7708da3a5a6ff0dd73508892e56e7cb1

  • SHA512

    25cf3859e0c4487d39d62815245f7d5797d766de3cb2afa4924d4a38b70e032debc1926a4fde7031bb6205e004a689728aa8c04b5dd921d5fee9eefff098b361

Malware Config

Extracted

Family

arkei

Botnet

Default

C2

http://die-grausamste-herrin.at/wp.php

Signatures

  • Arkei

    Arkei is an infostealer written in C++.

  • Arkei Stealer Payload 5 IoCs
  • Downloads MZ/PE file
  • Deletes itself 1 IoCs
  • Loads dropped DLL 5 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.

  • Suspicious use of SetThreadContext 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 behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3c84cce3867660912739106e235ed948.exe
    "C:\Users\Admin\AppData\Local\Temp\3c84cce3867660912739106e235ed948.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:320
    • C:\Users\Admin\AppData\Local\Temp\3c84cce3867660912739106e235ed948.exe
      "C:\Users\Admin\AppData\Local\Temp\3c84cce3867660912739106e235ed948.exe"
      2⤵
        PID:820
      • C:\Users\Admin\AppData\Local\Temp\3c84cce3867660912739106e235ed948.exe
        "C:\Users\Admin\AppData\Local\Temp\3c84cce3867660912739106e235ed948.exe"
        2⤵
        • Loads dropped DLL
        • Checks processor information in registry
        • Suspicious use of WriteProcessMemory
        PID:680
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\3c84cce3867660912739106e235ed948.exe" & exit
          3⤵
          • Deletes itself
          • Suspicious use of WriteProcessMemory
          PID:316
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 5
            4⤵
            • Delays execution with timeout.exe
            PID:1712

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Credential Access

    Credentials in Files

    2
    T1081

    Discovery

    Query Registry

    2
    T1012

    System Information Discovery

    2
    T1082

    Collection

    Data from Local System

    2
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • \ProgramData\mozglue.dll
      MD5

      8f73c08a9660691143661bf7332c3c27

      SHA1

      37fa65dd737c50fda710fdbde89e51374d0c204a

      SHA256

      3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

      SHA512

      0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

    • \ProgramData\msvcp140.dll
      MD5

      109f0f02fd37c84bfc7508d4227d7ed5

      SHA1

      ef7420141bb15ac334d3964082361a460bfdb975

      SHA256

      334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4

      SHA512

      46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39

    • \ProgramData\nss3.dll
      MD5

      bfac4e3c5908856ba17d41edcd455a51

      SHA1

      8eec7e888767aa9e4cca8ff246eb2aacb9170428

      SHA256

      e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

      SHA512

      2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

    • \ProgramData\sqlite3.dll
      MD5

      e477a96c8f2b18d6b5c27bde49c990bf

      SHA1

      e980c9bf41330d1e5bd04556db4646a0210f7409

      SHA256

      16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

      SHA512

      335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

    • \ProgramData\vcruntime140.dll
      MD5

      7587bf9cb4147022cd5681b015183046

      SHA1

      f2106306a8f6f0da5afb7fc765cfa0757ad5a628

      SHA256

      c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d

      SHA512

      0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f

    • memory/316-75-0x0000000000000000-mapping.dmp
    • memory/320-57-0x0000000076A21000-0x0000000076A23000-memory.dmp
      Filesize

      8KB

    • memory/320-58-0x00000000046B0000-0x00000000046B1000-memory.dmp
      Filesize

      4KB

    • memory/320-59-0x00000000046B5000-0x00000000046C6000-memory.dmp
      Filesize

      68KB

    • memory/320-60-0x0000000007F70000-0x000000000802B000-memory.dmp
      Filesize

      748KB

    • memory/320-55-0x0000000000310000-0x0000000000311000-memory.dmp
      Filesize

      4KB

    • memory/680-61-0x0000000000400000-0x0000000000424000-memory.dmp
      Filesize

      144KB

    • memory/680-69-0x0000000000400000-0x0000000000424000-memory.dmp
      Filesize

      144KB

    • memory/680-67-0x0000000000406690-mapping.dmp
    • memory/680-66-0x0000000000400000-0x0000000000424000-memory.dmp
      Filesize

      144KB

    • memory/680-62-0x0000000000400000-0x0000000000424000-memory.dmp
      Filesize

      144KB

    • memory/680-63-0x0000000000400000-0x0000000000424000-memory.dmp
      Filesize

      144KB

    • memory/680-65-0x0000000000400000-0x0000000000424000-memory.dmp
      Filesize

      144KB

    • memory/680-64-0x0000000000400000-0x0000000000424000-memory.dmp
      Filesize

      144KB

    • memory/1712-76-0x0000000000000000-mapping.dmp