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Resubmissions

11/05/2024, 00:16

240511-akzypach44 8

10/05/2024, 23:48

240510-3tjbhsbf49 9

Analysis

  • max time kernel
    149s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/05/2024, 00:16

General

  • Target

    8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256.exe

  • Size

    86KB

  • MD5

    7202600ab0929595c6fb059f6a353466

  • SHA1

    1afc916bc125ff8c779419b6f8642f9879a85182

  • SHA256

    8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256

  • SHA512

    25474643e00c4607b8c1fe24c153568613308273165a83e7c8d988df5f393fee1515c24efbac86692e9c90d0f603a886afe8a0bfae827939be7838abf024e821

  • SSDEEP

    1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmypn:uLRrO10TiJD9yjqrilyxOuPpn

Malware Config

Signatures

  • Blocklisted process makes network request 3 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

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

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

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256.exe
    "C:\Users\Admin\AppData\Local\Temp\8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4012
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\rcyia.exe "C:\Users\Admin\AppData\Local\Temp\8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3824
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 2
        3⤵
        • Runs ping.exe
        PID:5052
      • C:\Users\Admin\AppData\Local\Temp\rcyia.exe
        C:\Users\Admin\AppData\Local\Temp\\rcyia.exe "C:\Users\Admin\AppData\Local\Temp\8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4828
        • \??\c:\windows\SysWOW64\rundll32.exe
          c:\windows\system32\rundll32.exe "c:\fudki\rppmm.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\rcyia.exe
          4⤵
          • Blocklisted process makes network request
          • Loads dropped DLL
          • Adds Run key to start application
          • Enumerates connected drives
          • Writes to the Master Boot Record (MBR)
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1004

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\rcyia.exe

    Filesize

    86KB

    MD5

    64bff9abcaa73d1841aaa7bf7ba7686c

    SHA1

    77e6819632a69adafe80fd76094e0ef057072c0c

    SHA256

    3ecfd0199faeb405dd40613c8da99006d411a220aa8a386555b73a7c4de074ed

    SHA512

    08463043f60f5afa8c89cc7d7fdbd0b05b3b288dd9c6e58f798b85b8832c8b4339f0d8557ab6f993787cfd4caae79240b7abcdb652319e35d757e30d67a70932

  • C:\fudki\rppmm.dll

    Filesize

    44KB

    MD5

    0f12a7d509b2c9bb9b4cd6d8a0325e86

    SHA1

    f5fb59ad4f0633d115b06f35a2dc161dc4367157

    SHA256

    9111c1eb1f0b59dcd49cfd5a0abc0ba100ac59a3bcae8623ff091dfdc46fed3c

    SHA512

    e3c84a643ff0a2627daba8a056221985a472aaf07bade61b3e9459db4bfc8792c1347606911e3fcc01581508004b18b5435bcccd5e7617cc6d091f37a5f42e7f

  • memory/1004-11-0x0000000010000000-0x0000000010023000-memory.dmp

    Filesize

    140KB

  • memory/1004-12-0x0000000002520000-0x0000000002522000-memory.dmp

    Filesize

    8KB

  • memory/1004-13-0x0000000010000000-0x0000000010023000-memory.dmp

    Filesize

    140KB

  • memory/1004-15-0x0000000002520000-0x0000000002522000-memory.dmp

    Filesize

    8KB

  • memory/1004-16-0x0000000010000000-0x0000000010023000-memory.dmp

    Filesize

    140KB

  • memory/4012-0-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/4012-2-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/4828-6-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/4828-8-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB