Analysis

  • max time kernel
    120s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    25-12-2021 09:49

General

  • Target

    b853012145aabac760af9e9a0fe37b3e.exe

  • Size

    5.5MB

  • MD5

    b853012145aabac760af9e9a0fe37b3e

  • SHA1

    25bdf531d5fafeec8b02d3d2a09dfb5a1340e9c2

  • SHA256

    3f8974ef9b6a429376d46e082bbb9cb418417f25dcc744837c5b36efaf4c3f35

  • SHA512

    c66586730d1fc0751fc71b1e03597a7d6045d347221ed13179b393e8052f6c4050ce7e794861fc9fee2fd2fbc9a39dcb4e33530315b61b35784e487af0f95774

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Blocklisted process makes network request 4 IoCs
  • Executes dropped EXE 3 IoCs
  • Checks BIOS information in registry 2 TTPs 6 IoCs

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

  • Loads dropped DLL 10 IoCs
  • Themida packer 27 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 3 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • 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 NtSetInformationThreadHideFromDebugger 3 IoCs
  • Drops file in Program Files directory 3 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.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b853012145aabac760af9e9a0fe37b3e.exe
    "C:\Users\Admin\AppData\Local\Temp\b853012145aabac760af9e9a0fe37b3e.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:960
    • C:\Users\Admin\AppData\Local\Temp\nutlet\hughoc.exe
      "C:\Users\Admin\AppData\Local\Temp\nutlet\hughoc.exe"
      2⤵
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Loads dropped DLL
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1176
      • C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe
        "C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe"
        3⤵
        • Executes dropped EXE
        • Checks BIOS information in registry
        • Loads dropped DLL
        • Checks whether UAC is enabled
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious behavior: EnumeratesProcesses
        PID:456
    • C:\Users\Admin\AppData\Local\Temp\nutlet\kulmetvp.exe
      "C:\Users\Admin\AppData\Local\Temp\nutlet\kulmetvp.exe"
      2⤵
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Loads dropped DLL
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:784
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\aopyjai.vbs"
        3⤵
          PID:1536
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\suxhpkxe.vbs"
          3⤵
          • Blocklisted process makes network request
          PID:1772

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\aopyjai.vbs

      MD5

      badc4f454baec0a09629f2e90f03e7a0

      SHA1

      db7ae30a3fa96bd5e80e37a56fcddc4aeb6c4969

      SHA256

      34e3c9b2242ba0035a01ccb1bdc92fbb6502584ba521332f80a6e98247a3f391

      SHA512

      07f448f2411deb0761d0b494dfb0e4d05613ab67280c8434aa419b919640861702952149f509d75096591550d42391fedf3ed921bc0682b9a408f7ee8dde42e5

    • C:\Users\Admin\AppData\Local\Temp\nutlet\hughoc.exe

      MD5

      0019785ef16b9d250b3663c51b8df159

      SHA1

      527fc20c982e535116755d3415acfc397235c21b

      SHA256

      5f81fe3b07dd7cb4cb007867040928b81b3d5abd8cae2997eeae24d056c12e83

      SHA512

      d474ef3f4ac5dd8f3456948bc6a484c178f97435958a22849bec056025bc1658d077bbe0d671a5c6c90166b5e15efa3ed95cee819f243d322aa2adafab3f3888

    • C:\Users\Admin\AppData\Local\Temp\nutlet\hughoc.exe

      MD5

      0019785ef16b9d250b3663c51b8df159

      SHA1

      527fc20c982e535116755d3415acfc397235c21b

      SHA256

      5f81fe3b07dd7cb4cb007867040928b81b3d5abd8cae2997eeae24d056c12e83

      SHA512

      d474ef3f4ac5dd8f3456948bc6a484c178f97435958a22849bec056025bc1658d077bbe0d671a5c6c90166b5e15efa3ed95cee819f243d322aa2adafab3f3888

    • C:\Users\Admin\AppData\Local\Temp\nutlet\kulmetvp.exe

      MD5

      9dd925d43100d4e9a466cc7d0681213d

      SHA1

      ba8945827c9aa094b5bcb8cb8aa2d1fad1e74d79

      SHA256

      82ee9213fbcd132441778404eaf72ff4867eaa78d6d919b4746b3d769d7640cf

      SHA512

      2677542ff54a2608de9cf35a0fef2383a646c93b7002fb64169fe947fa915d78f4ed5e5fd6dd8471672082db24268cb5c2e87e345afc054f8bb23e7a0fc913a7

    • C:\Users\Admin\AppData\Local\Temp\nutlet\kulmetvp.exe

      MD5

      9dd925d43100d4e9a466cc7d0681213d

      SHA1

      ba8945827c9aa094b5bcb8cb8aa2d1fad1e74d79

      SHA256

      82ee9213fbcd132441778404eaf72ff4867eaa78d6d919b4746b3d769d7640cf

      SHA512

      2677542ff54a2608de9cf35a0fef2383a646c93b7002fb64169fe947fa915d78f4ed5e5fd6dd8471672082db24268cb5c2e87e345afc054f8bb23e7a0fc913a7

    • C:\Users\Admin\AppData\Local\Temp\suxhpkxe.vbs

      MD5

      fd296171a25cf6bd57881c0cb56367dc

      SHA1

      a04fc328843dfa8782910f1d7cb2b193f4e5b157

      SHA256

      666a0dd7003f5c126660245dc901e7aee1593771b2829ad84cb0f1c67118ba9e

      SHA512

      1efde3324abd4feba47178d45760da8be2f82f5de24034c3c8e1ed72a5d8dc0d57a9c67c025daa2cc4d49d6dcc7da15ab48fb7ea702605a7f20b1c2c194e5708

    • C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe

      MD5

      0019785ef16b9d250b3663c51b8df159

      SHA1

      527fc20c982e535116755d3415acfc397235c21b

      SHA256

      5f81fe3b07dd7cb4cb007867040928b81b3d5abd8cae2997eeae24d056c12e83

      SHA512

      d474ef3f4ac5dd8f3456948bc6a484c178f97435958a22849bec056025bc1658d077bbe0d671a5c6c90166b5e15efa3ed95cee819f243d322aa2adafab3f3888

    • C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe

      MD5

      0019785ef16b9d250b3663c51b8df159

      SHA1

      527fc20c982e535116755d3415acfc397235c21b

      SHA256

      5f81fe3b07dd7cb4cb007867040928b81b3d5abd8cae2997eeae24d056c12e83

      SHA512

      d474ef3f4ac5dd8f3456948bc6a484c178f97435958a22849bec056025bc1658d077bbe0d671a5c6c90166b5e15efa3ed95cee819f243d322aa2adafab3f3888

    • \Users\Admin\AppData\Local\Temp\nsnCF70.tmp\UAC.dll

      MD5

      adb29e6b186daa765dc750128649b63d

      SHA1

      160cbdc4cb0ac2c142d361df138c537aa7e708c9

      SHA256

      2f7f8fc05dc4fd0d5cda501b47e4433357e887bbfed7292c028d99c73b52dc08

      SHA512

      b28adcccf0c33660fecd6f95f28f11f793dc9988582187617b4c113fb4e6fdad4cf7694cd8c0300a477e63536456894d119741a940dda09b7df3ff0087a7eada

    • \Users\Admin\AppData\Local\Temp\nutlet\hughoc.exe

      MD5

      0019785ef16b9d250b3663c51b8df159

      SHA1

      527fc20c982e535116755d3415acfc397235c21b

      SHA256

      5f81fe3b07dd7cb4cb007867040928b81b3d5abd8cae2997eeae24d056c12e83

      SHA512

      d474ef3f4ac5dd8f3456948bc6a484c178f97435958a22849bec056025bc1658d077bbe0d671a5c6c90166b5e15efa3ed95cee819f243d322aa2adafab3f3888

    • \Users\Admin\AppData\Local\Temp\nutlet\hughoc.exe

      MD5

      0019785ef16b9d250b3663c51b8df159

      SHA1

      527fc20c982e535116755d3415acfc397235c21b

      SHA256

      5f81fe3b07dd7cb4cb007867040928b81b3d5abd8cae2997eeae24d056c12e83

      SHA512

      d474ef3f4ac5dd8f3456948bc6a484c178f97435958a22849bec056025bc1658d077bbe0d671a5c6c90166b5e15efa3ed95cee819f243d322aa2adafab3f3888

    • \Users\Admin\AppData\Local\Temp\nutlet\hughoc.exe

      MD5

      0019785ef16b9d250b3663c51b8df159

      SHA1

      527fc20c982e535116755d3415acfc397235c21b

      SHA256

      5f81fe3b07dd7cb4cb007867040928b81b3d5abd8cae2997eeae24d056c12e83

      SHA512

      d474ef3f4ac5dd8f3456948bc6a484c178f97435958a22849bec056025bc1658d077bbe0d671a5c6c90166b5e15efa3ed95cee819f243d322aa2adafab3f3888

    • \Users\Admin\AppData\Local\Temp\nutlet\kulmetvp.exe

      MD5

      9dd925d43100d4e9a466cc7d0681213d

      SHA1

      ba8945827c9aa094b5bcb8cb8aa2d1fad1e74d79

      SHA256

      82ee9213fbcd132441778404eaf72ff4867eaa78d6d919b4746b3d769d7640cf

      SHA512

      2677542ff54a2608de9cf35a0fef2383a646c93b7002fb64169fe947fa915d78f4ed5e5fd6dd8471672082db24268cb5c2e87e345afc054f8bb23e7a0fc913a7

    • \Users\Admin\AppData\Local\Temp\nutlet\kulmetvp.exe

      MD5

      9dd925d43100d4e9a466cc7d0681213d

      SHA1

      ba8945827c9aa094b5bcb8cb8aa2d1fad1e74d79

      SHA256

      82ee9213fbcd132441778404eaf72ff4867eaa78d6d919b4746b3d769d7640cf

      SHA512

      2677542ff54a2608de9cf35a0fef2383a646c93b7002fb64169fe947fa915d78f4ed5e5fd6dd8471672082db24268cb5c2e87e345afc054f8bb23e7a0fc913a7

    • \Users\Admin\AppData\Local\Temp\nutlet\kulmetvp.exe

      MD5

      9dd925d43100d4e9a466cc7d0681213d

      SHA1

      ba8945827c9aa094b5bcb8cb8aa2d1fad1e74d79

      SHA256

      82ee9213fbcd132441778404eaf72ff4867eaa78d6d919b4746b3d769d7640cf

      SHA512

      2677542ff54a2608de9cf35a0fef2383a646c93b7002fb64169fe947fa915d78f4ed5e5fd6dd8471672082db24268cb5c2e87e345afc054f8bb23e7a0fc913a7

    • \Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe

      MD5

      0019785ef16b9d250b3663c51b8df159

      SHA1

      527fc20c982e535116755d3415acfc397235c21b

      SHA256

      5f81fe3b07dd7cb4cb007867040928b81b3d5abd8cae2997eeae24d056c12e83

      SHA512

      d474ef3f4ac5dd8f3456948bc6a484c178f97435958a22849bec056025bc1658d077bbe0d671a5c6c90166b5e15efa3ed95cee819f243d322aa2adafab3f3888

    • \Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe

      MD5

      0019785ef16b9d250b3663c51b8df159

      SHA1

      527fc20c982e535116755d3415acfc397235c21b

      SHA256

      5f81fe3b07dd7cb4cb007867040928b81b3d5abd8cae2997eeae24d056c12e83

      SHA512

      d474ef3f4ac5dd8f3456948bc6a484c178f97435958a22849bec056025bc1658d077bbe0d671a5c6c90166b5e15efa3ed95cee819f243d322aa2adafab3f3888

    • \Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe

      MD5

      0019785ef16b9d250b3663c51b8df159

      SHA1

      527fc20c982e535116755d3415acfc397235c21b

      SHA256

      5f81fe3b07dd7cb4cb007867040928b81b3d5abd8cae2997eeae24d056c12e83

      SHA512

      d474ef3f4ac5dd8f3456948bc6a484c178f97435958a22849bec056025bc1658d077bbe0d671a5c6c90166b5e15efa3ed95cee819f243d322aa2adafab3f3888

    • memory/456-82-0x0000000000000000-mapping.dmp

    • memory/456-88-0x00000000011B0000-0x0000000001899000-memory.dmp

      Filesize

      6.9MB

    • memory/456-91-0x00000000011B0000-0x0000000001899000-memory.dmp

      Filesize

      6.9MB

    • memory/456-90-0x00000000011B0000-0x0000000001899000-memory.dmp

      Filesize

      6.9MB

    • memory/456-89-0x00000000011B0000-0x0000000001899000-memory.dmp

      Filesize

      6.9MB

    • memory/784-75-0x0000000000C40000-0x000000000131A000-memory.dmp

      Filesize

      6.9MB

    • memory/784-71-0x0000000000C40000-0x000000000131A000-memory.dmp

      Filesize

      6.9MB

    • memory/784-73-0x0000000000C40000-0x000000000131A000-memory.dmp

      Filesize

      6.9MB

    • memory/784-64-0x0000000000000000-mapping.dmp

    • memory/784-70-0x0000000000C40000-0x000000000131A000-memory.dmp

      Filesize

      6.9MB

    • memory/960-54-0x0000000074F01000-0x0000000074F03000-memory.dmp

      Filesize

      8KB

    • memory/1176-57-0x0000000000000000-mapping.dmp

    • memory/1176-77-0x0000000000A10000-0x00000000010F9000-memory.dmp

      Filesize

      6.9MB

    • memory/1176-76-0x0000000000A10000-0x00000000010F9000-memory.dmp

      Filesize

      6.9MB

    • memory/1176-74-0x0000000000A10000-0x00000000010F9000-memory.dmp

      Filesize

      6.9MB

    • memory/1176-72-0x0000000000A10000-0x00000000010F9000-memory.dmp

      Filesize

      6.9MB

    • memory/1536-78-0x0000000000000000-mapping.dmp

    • memory/1772-92-0x0000000000000000-mapping.dmp