Analysis

  • max time kernel
    181s
  • max time network
    183s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    28-11-2022 04:28

General

  • Target

    321c9ef63499b2134b32bdbb53fc0aaf917ae0e587aab872e4ad926ca8066c81.exe

  • Size

    172KB

  • MD5

    c517194ef951573907186b800ea321c0

  • SHA1

    1feb029d3c69d69958b317f8763fdb65d9b2df4d

  • SHA256

    321c9ef63499b2134b32bdbb53fc0aaf917ae0e587aab872e4ad926ca8066c81

  • SHA512

    e8925698d7e32fac5b55fe98d7929a40be08b5cb31dac065cdfa8b65016f64eaef4aa6aa774b9ca733f1c72eabac4b6c87e6cd00c063a51d7e78d7a1651d3057

  • SSDEEP

    3072:vwHteez3OtcHeZePIv9FTAxd8uGEnIB6P7K0Q0cNVB81VYrc0t1PbvN8KgCLn2J:/ez3OkkBVFTehI87d0WkBbv12J

Malware Config

Signatures

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\321c9ef63499b2134b32bdbb53fc0aaf917ae0e587aab872e4ad926ca8066c81.exe
    "C:\Users\Admin\AppData\Local\Temp\321c9ef63499b2134b32bdbb53fc0aaf917ae0e587aab872e4ad926ca8066c81.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2040
    • C:\Users\Admin\AppData\Local\Temp\321c9ef63499b2134b32bdbb53fc0aaf917ae0e587aab872e4ad926ca8066c81.exe
      C:\Users\Admin\AppData\Local\Temp\321c9ef63499b2134b32bdbb53fc0aaf917ae0e587aab872e4ad926ca8066c81.exe
      2⤵
      • Loads dropped DLL
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2032
      • C:\Users\Admin\AppData\Roaming\hfweyjs.exe
        C:\Users\Admin\AppData\Roaming\hfweyjs.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:516
        • C:\Users\Admin\AppData\Roaming\hfweyjs.exe
          C:\Users\Admin\AppData\Roaming\hfweyjs.exe
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Drops file in Program Files directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1276
          • C:\Windows\System32\vssadmin.exe
            "C:\Windows\System32\vssadmin.exe" delete shadows /all /Quiet
            5⤵
            • Interacts with shadow copies
            PID:1352
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\321C9E~1.EXE >> NUL
        3⤵
          PID:760
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1780

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    File Deletion

    2
    T1107

    Modify Registry

    1
    T1112

    Discovery

    System Information Discovery

    1
    T1082

    Impact

    Inhibit System Recovery

    2
    T1490

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\hfweyjs.exe
      Filesize

      172KB

      MD5

      c517194ef951573907186b800ea321c0

      SHA1

      1feb029d3c69d69958b317f8763fdb65d9b2df4d

      SHA256

      321c9ef63499b2134b32bdbb53fc0aaf917ae0e587aab872e4ad926ca8066c81

      SHA512

      e8925698d7e32fac5b55fe98d7929a40be08b5cb31dac065cdfa8b65016f64eaef4aa6aa774b9ca733f1c72eabac4b6c87e6cd00c063a51d7e78d7a1651d3057

    • C:\Users\Admin\AppData\Roaming\hfweyjs.exe
      Filesize

      172KB

      MD5

      c517194ef951573907186b800ea321c0

      SHA1

      1feb029d3c69d69958b317f8763fdb65d9b2df4d

      SHA256

      321c9ef63499b2134b32bdbb53fc0aaf917ae0e587aab872e4ad926ca8066c81

      SHA512

      e8925698d7e32fac5b55fe98d7929a40be08b5cb31dac065cdfa8b65016f64eaef4aa6aa774b9ca733f1c72eabac4b6c87e6cd00c063a51d7e78d7a1651d3057

    • C:\Users\Admin\AppData\Roaming\hfweyjs.exe
      Filesize

      172KB

      MD5

      c517194ef951573907186b800ea321c0

      SHA1

      1feb029d3c69d69958b317f8763fdb65d9b2df4d

      SHA256

      321c9ef63499b2134b32bdbb53fc0aaf917ae0e587aab872e4ad926ca8066c81

      SHA512

      e8925698d7e32fac5b55fe98d7929a40be08b5cb31dac065cdfa8b65016f64eaef4aa6aa774b9ca733f1c72eabac4b6c87e6cd00c063a51d7e78d7a1651d3057

    • \Users\Admin\AppData\Roaming\hfweyjs.exe
      Filesize

      172KB

      MD5

      c517194ef951573907186b800ea321c0

      SHA1

      1feb029d3c69d69958b317f8763fdb65d9b2df4d

      SHA256

      321c9ef63499b2134b32bdbb53fc0aaf917ae0e587aab872e4ad926ca8066c81

      SHA512

      e8925698d7e32fac5b55fe98d7929a40be08b5cb31dac065cdfa8b65016f64eaef4aa6aa774b9ca733f1c72eabac4b6c87e6cd00c063a51d7e78d7a1651d3057

    • memory/516-71-0x0000000000000000-mapping.dmp
    • memory/760-91-0x0000000000000000-mapping.dmp
    • memory/1276-90-0x0000000000400000-0x0000000000467000-memory.dmp
      Filesize

      412KB

    • memory/1276-84-0x00000000004258D1-mapping.dmp
    • memory/1276-94-0x0000000000400000-0x0000000000467000-memory.dmp
      Filesize

      412KB

    • memory/1352-93-0x0000000000000000-mapping.dmp
    • memory/2032-60-0x0000000000400000-0x0000000000467000-memory.dmp
      Filesize

      412KB

    • memory/2032-58-0x0000000000400000-0x0000000000467000-memory.dmp
      Filesize

      412KB

    • memory/2032-64-0x0000000000400000-0x0000000000467000-memory.dmp
      Filesize

      412KB

    • memory/2032-56-0x0000000000400000-0x0000000000467000-memory.dmp
      Filesize

      412KB

    • memory/2032-55-0x0000000000400000-0x0000000000467000-memory.dmp
      Filesize

      412KB

    • memory/2032-65-0x00000000004258D1-mapping.dmp
    • memory/2032-62-0x0000000000400000-0x0000000000467000-memory.dmp
      Filesize

      412KB

    • memory/2032-92-0x0000000000400000-0x0000000000467000-memory.dmp
      Filesize

      412KB

    • memory/2032-69-0x0000000000400000-0x0000000000467000-memory.dmp
      Filesize

      412KB

    • memory/2032-68-0x0000000000400000-0x0000000000467000-memory.dmp
      Filesize

      412KB

    • memory/2040-54-0x0000000076411000-0x0000000076413000-memory.dmp
      Filesize

      8KB