Analysis

  • max time kernel
    55s
  • max time network
    57s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    30/12/2022, 01:56

General

  • Target
    febde8fd7e0d1b6191442768f2d8dd2d7dd90740c70fe917f3b4f1c24ea0d46f.exe
  • Size 1.8MB
  • Sample221230-ccwmeaaa4x
  • SHA256 febde8fd7e0d1b6191442768f2d8dd2d7dd90740c70fe917f3b4f1c24ea0d46f
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Extracted

Family
  • nymaim

C2
  • 45.139.105.171

  • 85.31.46.167

Signatures

  • NyMaim

    NyMaim is a malware with various capabilities written in C++ and first seen in 2013.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 10 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Program Files directory 17 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\febde8fd7e0d1b6191442768f2d8dd2d7dd90740c70fe917f3b4f1c24ea0d46f.exe
    "C:\Users\Admin\AppData\Local\Temp\febde8fd7e0d1b6191442768f2d8dd2d7dd90740c70fe917f3b4f1c24ea0d46f.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1432
    • C:\Users\Admin\AppData\Local\Temp\is-OKRCH.tmp\is-H9QO2.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-OKRCH.tmp\is-H9QO2.tmp" /SL4 $7012A "C:\Users\Admin\AppData\Local\Temp\febde8fd7e0d1b6191442768f2d8dd2d7dd90740c70fe917f3b4f1c24ea0d46f.exe" 1661482 166400
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:956
      • C:\Program Files (x86)\Split Files\SplitFiles124.exe
        "C:\Program Files (x86)\Split Files\SplitFiles124.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1120
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\2O11d.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:436
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles124.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles124.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1768
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "SplitFiles124.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1904

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        SplitFiles124.exe

        • Path C:\Program Files (x86)\Split Files\SplitFiles124.exe
        • Size 3.2MB
        • SHA256 c8bd57de5ec1ead05cb012edb4898ba71ba2dcccedf8aa30684cae0cf6003a5e
        • MD5 SHA1 SHA512 SSDEEP

        SplitFiles124.exe

        • Path C:\Program Files (x86)\Split Files\SplitFiles124.exe
        • Size 3.2MB
        • SHA256 c8bd57de5ec1ead05cb012edb4898ba71ba2dcccedf8aa30684cae0cf6003a5e
        • MD5 SHA1 SHA512 SSDEEP

        is-H9QO2.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\is-OKRCH.tmp\is-H9QO2.tmp
        • Size 756KB
        • SHA256 0cf25da416c0de0814b116f3b917412415e285622149b82d6ee701d94316427b
        • MD5 SHA1 SHA512 SSDEEP

        is-H9QO2.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\is-OKRCH.tmp\is-H9QO2.tmp
        • Size 756KB
        • SHA256 0cf25da416c0de0814b116f3b917412415e285622149b82d6ee701d94316427b
        • MD5 SHA1 SHA512 SSDEEP

        2O11d.exe

        • Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\2O11d.exe
        • Size 72KB
        • SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
        • MD5 SHA1 SHA512 SSDEEP

        2O11d.exe

        • Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\2O11d.exe
        • Size 72KB
        • SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
        • MD5 SHA1 SHA512 SSDEEP

        SplitFiles124.exe

        • Path \Program Files (x86)\Split Files\SplitFiles124.exe
        • Size 3.2MB
        • SHA256 c8bd57de5ec1ead05cb012edb4898ba71ba2dcccedf8aa30684cae0cf6003a5e
        • MD5 SHA1 SHA512 SSDEEP

        SplitFiles124.exe

        • Path \Program Files (x86)\Split Files\SplitFiles124.exe
        • Size 3.2MB
        • SHA256 c8bd57de5ec1ead05cb012edb4898ba71ba2dcccedf8aa30684cae0cf6003a5e
        • MD5 SHA1 SHA512 SSDEEP

        SplitFiles124.exe

        • Path \Program Files (x86)\Split Files\SplitFiles124.exe
        • Size 3.2MB
        • SHA256 c8bd57de5ec1ead05cb012edb4898ba71ba2dcccedf8aa30684cae0cf6003a5e
        • MD5 SHA1 SHA512 SSDEEP

        is-H9QO2.tmp

        • Path \Users\Admin\AppData\Local\Temp\is-OKRCH.tmp\is-H9QO2.tmp
        • Size 756KB
        • SHA256 0cf25da416c0de0814b116f3b917412415e285622149b82d6ee701d94316427b
        • MD5 SHA1 SHA512 SSDEEP

        _iscrypt.dll

        • Path \Users\Admin\AppData\Local\Temp\is-RVMDD.tmp\_iscrypt.dll
        • Size 2KB
        • SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
        • MD5 SHA1 SHA512

        _shfoldr.dll

        • Path \Users\Admin\AppData\Local\Temp\is-RVMDD.tmp\_isetup\_shfoldr.dll
        • Size 22KB
        • SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
        • MD5 SHA1 SHA512 SSDEEP

        _shfoldr.dll

        • Path \Users\Admin\AppData\Local\Temp\is-RVMDD.tmp\_isetup\_shfoldr.dll
        • Size 22KB
        • SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
        • MD5 SHA1 SHA512 SSDEEP

        2O11d.exe

        • Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\2O11d.exe
        • Size 72KB
        • SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
        • MD5 SHA1 SHA512 SSDEEP

        2O11d.exe

        • Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\2O11d.exe
        • Size 72KB
        • SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
        • MD5 SHA1 SHA512 SSDEEP

        2O11d.exe

        • Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\2O11d.exe
        • Size 72KB
        • SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
        • MD5 SHA1 SHA512 SSDEEP

        memory/956-73-0x0000000003990000-0x0000000004ABC000-memory.dmp

        memory/956-90-0x0000000003990000-0x0000000004ABC000-memory.dmp

        memory/1120-92-0x0000000000400000-0x000000000152C000-memory.dmp

        memory/1120-91-0x0000000001B70000-0x0000000002C9C000-memory.dmp

        memory/1120-77-0x0000000000400000-0x000000000152C000-memory.dmp

        memory/1120-78-0x0000000000400000-0x000000000152C000-memory.dmp

        memory/1120-76-0x0000000000400000-0x000000000152C000-memory.dmp

        memory/1120-97-0x0000000000400000-0x000000000152C000-memory.dmp

        memory/1120-74-0x0000000001B70000-0x0000000002C9C000-memory.dmp

        memory/1120-86-0x0000000010000000-0x000000001001B000-memory.dmp

        memory/1120-75-0x0000000001B70000-0x0000000002C9C000-memory.dmp

        memory/1432-66-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/1432-54-0x0000000074DA1000-0x0000000074DA3000-memory.dmp

        memory/1432-55-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/1432-98-0x0000000000400000-0x000000000042F000-memory.dmp