Analysis

  • max time kernel
    149s
  • max time network
    107s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-02-2023 02:19

General

  • Target

    bfb8286490735f777b64ccdf4fa211e53b2ceb7a8d6cd1929760c211c58b972f.exe

  • Size

    355KB

  • MD5

    8ede2c513718db9aff6af9e587b24410

  • SHA1

    e32bcf8d62241a66ba3f748af0b505547b16de8c

  • SHA256

    bfb8286490735f777b64ccdf4fa211e53b2ceb7a8d6cd1929760c211c58b972f

  • SHA512

    d2bdf4ffe8ca3905f08da6a88d0289c9a3699ccb78a6aa03b294aac413fe340ee773946896e27a333867636d4974828ef62455b41fcbdd926ee0459304a04961

  • SSDEEP

    6144:mhb8VSeoQZP0MPkUonj5tQHTFdkelDnUEA6Fyz1+KqW40D1Kp4StY6Vw7uX:2IweoQR0MPktjsHUZeWD0Z7VQ

Malware Config

Signatures

  • Blackmoon, KrBanker

    Blackmoon also known as KrBanker is banking trojan first discovered in early 2014.

  • Detect Blackmoon payload 6 IoCs
  • Gh0st RAT payload 3 IoCs
  • Gh0strat

    Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies registry class 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bfb8286490735f777b64ccdf4fa211e53b2ceb7a8d6cd1929760c211c58b972f.exe
    "C:\Users\Admin\AppData\Local\Temp\bfb8286490735f777b64ccdf4fa211e53b2ceb7a8d6cd1929760c211c58b972f.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Adds Run key to start application
    • Enumerates connected drives
    • Checks processor information in registry
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: RenamesItself
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3012
    • C:\Windows\SysWOW64\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\bfb8286490735f777b64ccdf4fa211e53b2ceb7a8d6cd1929760c211c58b972f.txt
      2⤵
      • Opens file in notepad (likely ransom note)
      PID:4988
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3012 -s 2132
      2⤵
      • Program crash
      PID:1916
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3012 -ip 3012
    1⤵
      PID:3276

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\bfb8286490735f777b64ccdf4fa211e53b2ceb7a8d6cd1929760c211c58b972f.txt
      Filesize

      120KB

      MD5

      3aea5b78bac5359a799c2714fecccd1a

      SHA1

      5d3203b328ecfc7a55c0ded1032d209e9f273367

      SHA256

      c05e763cab67cf9daf5be7a6a6cff2650223987a9693eaa119f69b2bbb6df6c3

      SHA512

      9513cc84a7ed3dd709d4affb03f6e286dcd43e82f33441c00a9d74d2b45449f2ee20baa8db46218d7a59d9e62fb7f95050ea305166e70f3e71dde39ccf07b6d3

    • C:\Users\Public\Documents\sjsw.log
      Filesize

      214B

      MD5

      959ac6885577db087ef67a95a6a20b11

      SHA1

      9b95ecb8ec21cc6d1a66445e7dfccd1cc3be28a6

      SHA256

      a25c209bb1632b10b67322cfa6ac12a3b792ae3bd0be979675df99bdcd680e4a

      SHA512

      43298968510088467ad33f5cbf40a9a8477ae71595af2915253c41fd25b64a984dca3c07dcdec99f12c56b125774fc10d92b9955b8bdf644a1433947e9127485

    • C:\Users\Public\Documents\yrrgt.dll
      Filesize

      2KB

      MD5

      7943effe67a4647e06def2348949020e

      SHA1

      eabd561f0639a975de259633f63896d82c3f878d

      SHA256

      3fac47db92d581b2daef7a4f9493be2fe441041e5158101d80873d05808d5cfa

      SHA512

      c9db1962e7457c94426c2a5c7f439736697d4399db6982c45357459d58805daa4a9d297912135488b6990e265ffa59d687fd5ba43717aab46ccc212083ef5003

    • memory/3012-141-0x0000000002E50000-0x0000000002EB6000-memory.dmp
      Filesize

      408KB

    • memory/3012-170-0x0000000003FD0000-0x00000000040BC000-memory.dmp
      Filesize

      944KB

    • memory/3012-133-0x0000000000400000-0x00000000004FB000-memory.dmp
      Filesize

      1004KB

    • memory/3012-142-0x0000000002E50000-0x0000000002EB6000-memory.dmp
      Filesize

      408KB

    • memory/3012-144-0x0000000002E50000-0x0000000002EB6000-memory.dmp
      Filesize

      408KB

    • memory/3012-145-0x0000000002320000-0x0000000002323000-memory.dmp
      Filesize

      12KB

    • memory/3012-135-0x0000000000400000-0x00000000004FB000-memory.dmp
      Filesize

      1004KB

    • memory/3012-134-0x0000000000400000-0x00000000004FB000-memory.dmp
      Filesize

      1004KB

    • memory/3012-169-0x0000000003FD0000-0x00000000040BC000-memory.dmp
      Filesize

      944KB

    • memory/3012-136-0x0000000000400000-0x00000000004FB000-memory.dmp
      Filesize

      1004KB

    • memory/3012-171-0x0000000000400000-0x0000000000427000-memory.dmp
      Filesize

      156KB

    • memory/3012-172-0x0000000003FD0000-0x00000000040BC000-memory.dmp
      Filesize

      944KB

    • memory/3012-176-0x0000000010000000-0x0000000010017000-memory.dmp
      Filesize

      92KB

    • memory/3012-175-0x0000000010001000-0x000000001000F000-memory.dmp
      Filesize

      56KB

    • memory/3012-178-0x0000000000400000-0x0000000000427000-memory.dmp
      Filesize

      156KB

    • memory/3012-187-0x0000000002E50000-0x0000000002EB6000-memory.dmp
      Filesize

      408KB

    • memory/3012-189-0x0000000002E50000-0x0000000002EB6000-memory.dmp
      Filesize

      408KB

    • memory/3012-191-0x0000000000400000-0x0000000000427000-memory.dmp
      Filesize

      156KB

    • memory/3012-194-0x0000000002E50000-0x0000000002EB6000-memory.dmp
      Filesize

      408KB

    • memory/3012-196-0x0000000010000000-0x0000000010003000-memory.dmp
      Filesize

      12KB