Analysis

  • max time kernel
    64s
  • max time network
    84s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    22/11/2022, 02:02

General

  • Target
    file.exe
  • Size 1.3MB
  • Sample221122-cf43ysfa96
  • SHA256 5f7d5ac5776d86b03306916e6a5bbba4ff53a8fa302ee520ab21ae922c202adf
  • 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 9 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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1264
    • C:\Users\Admin\AppData\Local\Temp\is-91T1P.tmp\is-BGEPK.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-91T1P.tmp\is-BGEPK.tmp" /SL4 $70122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1084405 51712
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1708
      • C:\Program Files (x86)\PrintFolders\PrintFolders.exe
        "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1496
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\OFfqfnY0ButzU4.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1028
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1692
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "PrintFolders.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1020

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        PrintFolders.exe

        • Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
        • Size 1.5MB
        • SHA256 742bc6bf089146e374af979f4dfaabd3fb0ee160ad510d3305079155db6a728a
        • MD5 SHA1 SHA512 SSDEEP

        PrintFolders.exe

        • Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
        • Size 1.5MB
        • SHA256 742bc6bf089146e374af979f4dfaabd3fb0ee160ad510d3305079155db6a728a
        • MD5 SHA1 SHA512 SSDEEP

        is-BGEPK.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\is-91T1P.tmp\is-BGEPK.tmp
        • Size 643KB
        • SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
        • MD5 SHA1 SHA512 SSDEEP

        is-BGEPK.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\is-91T1P.tmp\is-BGEPK.tmp
        • Size 643KB
        • SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
        • MD5 SHA1 SHA512 SSDEEP

        OFfqfnY0ButzU4.exe

        • Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\OFfqfnY0ButzU4.exe
        • Size 72KB
        • SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
        • MD5 SHA1 SHA512 SSDEEP

        OFfqfnY0ButzU4.exe

        • Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\OFfqfnY0ButzU4.exe
        • Size 72KB
        • SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
        • MD5 SHA1 SHA512 SSDEEP

        PrintFolders.exe

        • Path \Program Files (x86)\PrintFolders\PrintFolders.exe
        • Size 1.5MB
        • SHA256 742bc6bf089146e374af979f4dfaabd3fb0ee160ad510d3305079155db6a728a
        • MD5 SHA1 SHA512 SSDEEP

        PrintFolders.exe

        • Path \Program Files (x86)\PrintFolders\PrintFolders.exe
        • Size 1.5MB
        • SHA256 742bc6bf089146e374af979f4dfaabd3fb0ee160ad510d3305079155db6a728a
        • MD5 SHA1 SHA512 SSDEEP

        PrintFolders.exe

        • Path \Program Files (x86)\PrintFolders\PrintFolders.exe
        • Size 1.5MB
        • SHA256 742bc6bf089146e374af979f4dfaabd3fb0ee160ad510d3305079155db6a728a
        • MD5 SHA1 SHA512 SSDEEP

        is-BGEPK.tmp

        • Path \Users\Admin\AppData\Local\Temp\is-91T1P.tmp\is-BGEPK.tmp
        • Size 643KB
        • SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
        • MD5 SHA1 SHA512 SSDEEP

        _iscrypt.dll

        • Path \Users\Admin\AppData\Local\Temp\is-EA9B9.tmp\_iscrypt.dll
        • Size 2KB
        • SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
        • MD5 SHA1 SHA512

        _shfoldr.dll

        • Path \Users\Admin\AppData\Local\Temp\is-EA9B9.tmp\_isetup\_shfoldr.dll
        • Size 22KB
        • SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
        • MD5 SHA1 SHA512 SSDEEP

        _shfoldr.dll

        • Path \Users\Admin\AppData\Local\Temp\is-EA9B9.tmp\_isetup\_shfoldr.dll
        • Size 22KB
        • SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
        • MD5 SHA1 SHA512 SSDEEP

        OFfqfnY0ButzU4.exe

        • Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\OFfqfnY0ButzU4.exe
        • Size 72KB
        • SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
        • MD5 SHA1 SHA512 SSDEEP

        OFfqfnY0ButzU4.exe

        • Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\OFfqfnY0ButzU4.exe
        • Size 72KB
        • SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
        • MD5 SHA1 SHA512 SSDEEP

        OFfqfnY0ButzU4.exe

        • Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\OFfqfnY0ButzU4.exe
        • Size 72KB
        • SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
        • MD5 SHA1 SHA512 SSDEEP

        memory/1264-54-0x0000000074E01000-0x0000000074E03000-memory.dmp

        memory/1264-99-0x0000000000400000-0x0000000000413000-memory.dmp

        memory/1264-55-0x0000000000400000-0x0000000000413000-memory.dmp

        memory/1264-58-0x0000000000400000-0x0000000000413000-memory.dmp

        memory/1496-74-0x0000000000400000-0x000000000137F000-memory.dmp

        memory/1496-87-0x0000000000400000-0x000000000137F000-memory.dmp

        memory/1496-77-0x0000000000400000-0x000000000137F000-memory.dmp

        memory/1496-76-0x0000000001BC0000-0x0000000002B3F000-memory.dmp

        memory/1496-75-0x0000000001BC0000-0x0000000002B3F000-memory.dmp

        memory/1496-98-0x0000000000400000-0x000000000137F000-memory.dmp

        memory/1496-78-0x0000000000400000-0x000000000137F000-memory.dmp

        memory/1496-88-0x0000000001BC0000-0x0000000002B3F000-memory.dmp

        memory/1496-89-0x0000000010000000-0x000000001001B000-memory.dmp

        memory/1496-93-0x0000000000400000-0x000000000137F000-memory.dmp

        memory/1708-73-0x0000000003050000-0x0000000003FCF000-memory.dmp

        memory/1708-86-0x0000000003050000-0x0000000003FCF000-memory.dmp