Analysis

  • max time kernel
    138s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-10-2022 07:37

General

  • Target

    file.exe

  • Size

    220KB

  • MD5

    5ad8f4a88035e5e94787e34004b0e58c

  • SHA1

    998908ccbf798430c268c4f4ff2fd5c8db07c142

  • SHA256

    5d59918ce4a82077f71fa248bf45aea8b1937adbbafd5cf0d1c518799007acfb

  • SHA512

    5b6945ac9c6f961fa289fb31b198a5a651c72b139f76b708fdb98c1eedc0df9eb5368f87f573254d0a1f7051f333dd6143a5e0672cf1d1c5a82dd416fb1e6a24

  • SSDEEP

    3072:9BbhegORVLV/xlGqg56+Ua3WWakts8DH/RMt03IXCmYvRGe31kntVP+paM5utMHl:9ehJl0GaNDhetEyCHvRGeFwPBIuS

Score
10/10

Malware Config

Extracted

Family

nymaim

C2

208.67.104.97

85.31.46.167

Signatures

  • NyMaim

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

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • AutoIT Executable 2 IoCs

    AutoIT scripts compiled to PE executables.

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 11 IoCs
  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of WriteProcessMemory
    PID:2536
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 456
      2⤵
      • Program crash
      PID:2392
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 768
      2⤵
      • Program crash
      PID:1976
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 808
      2⤵
      • Program crash
      PID:3624
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 808
      2⤵
      • Program crash
      PID:2204
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 860
      2⤵
      • Program crash
      PID:2808
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 824
      2⤵
      • Program crash
      PID:4896
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 1012
      2⤵
      • Program crash
      PID:1808
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 844
      2⤵
      • Program crash
      PID:540
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 1372
      2⤵
      • Program crash
      PID:1916
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\Cmj1gvpkq4Q1NRdlrLEzPN\Cleaner.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:5112
      • C:\Users\Admin\AppData\Local\Temp\Cmj1gvpkq4Q1NRdlrLEzPN\Cleaner.exe
        "C:\Users\Admin\AppData\Local\Temp\Cmj1gvpkq4Q1NRdlrLEzPN\Cleaner.exe"
        3⤵
        • Executes dropped EXE
        • Modifies system certificate store
        • Suspicious use of AdjustPrivilegeToken
        PID:3528
        • C:\Windows\system32\WerFault.exe
          C:\Windows\system32\WerFault.exe -u -p 3528 -s 2280
          4⤵
          • Program crash
          PID:4200
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 1388
      2⤵
      • Program crash
      PID:2152
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 2536 -ip 2536
    1⤵
      PID:1608
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2536 -ip 2536
      1⤵
        PID:4852
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 2536 -ip 2536
        1⤵
          PID:1156
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2536 -ip 2536
          1⤵
            PID:3348
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 2536 -ip 2536
            1⤵
              PID:1484
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 2536 -ip 2536
              1⤵
                PID:4908
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 2536 -ip 2536
                1⤵
                  PID:4784
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2536 -ip 2536
                  1⤵
                    PID:4072
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 2536 -ip 2536
                    1⤵
                      PID:1816
                    • C:\Windows\SysWOW64\WerFault.exe
                      C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 2536 -ip 2536
                      1⤵
                        PID:2600
                      • C:\Windows\system32\WerFault.exe
                        C:\Windows\system32\WerFault.exe -pss -s 572 -p 3528 -ip 3528
                        1⤵
                          PID:4184

                        Network

                        MITRE ATT&CK Matrix ATT&CK v6

                        Defense Evasion

                        Install Root Certificate

                        1
                        T1130

                        Modify Registry

                        1
                        T1112

                        Discovery

                        Query Registry

                        1
                        T1012

                        System Information Discovery

                        2
                        T1082

                        Command and Control

                        Web Service

                        1
                        T1102

                        Replay Monitor

                        Loading Replay Monitor...

                        Downloads

                        • C:\Users\Admin\AppData\Local\Temp\Cmj1gvpkq4Q1NRdlrLEzPN\Bunifu_UI_v1.5.3.dll
                          Filesize

                          236KB

                          MD5

                          2ecb51ab00c5f340380ecf849291dbcf

                          SHA1

                          1a4dffbce2a4ce65495ed79eab42a4da3b660931

                          SHA256

                          f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf

                          SHA512

                          e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b

                        • C:\Users\Admin\AppData\Local\Temp\Cmj1gvpkq4Q1NRdlrLEzPN\Cleaner.exe
                          Filesize

                          3.8MB

                          MD5

                          04514bd4962f7d60679434e0ebe49184

                          SHA1

                          1493a5447eb8156a7d7aecff60ee8bfba2209526

                          SHA256

                          c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568

                          SHA512

                          a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e

                        • C:\Users\Admin\AppData\Local\Temp\Cmj1gvpkq4Q1NRdlrLEzPN\Cleaner.exe
                          Filesize

                          3.8MB

                          MD5

                          04514bd4962f7d60679434e0ebe49184

                          SHA1

                          1493a5447eb8156a7d7aecff60ee8bfba2209526

                          SHA256

                          c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568

                          SHA512

                          a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e

                        • memory/2536-137-0x0000000000400000-0x0000000000594000-memory.dmp
                          Filesize

                          1.6MB

                        • memory/2536-136-0x00000000022D0000-0x000000000230F000-memory.dmp
                          Filesize

                          252KB

                        • memory/2536-132-0x000000000082D000-0x0000000000853000-memory.dmp
                          Filesize

                          152KB

                        • memory/2536-134-0x0000000000400000-0x0000000000594000-memory.dmp
                          Filesize

                          1.6MB

                        • memory/2536-135-0x000000000082D000-0x0000000000853000-memory.dmp
                          Filesize

                          152KB

                        • memory/2536-133-0x00000000022D0000-0x000000000230F000-memory.dmp
                          Filesize

                          252KB

                        • memory/3528-139-0x0000000000000000-mapping.dmp
                        • memory/3528-142-0x00000147BEC90000-0x00000147BEDE6000-memory.dmp
                          Filesize

                          1.3MB

                        • memory/3528-143-0x00007FFA04DF0000-0x00007FFA058B1000-memory.dmp
                          Filesize

                          10.8MB

                        • memory/3528-145-0x00000147C0AF0000-0x00000147C0B32000-memory.dmp
                          Filesize

                          264KB

                        • memory/3528-146-0x00007FFA04DF0000-0x00007FFA058B1000-memory.dmp
                          Filesize

                          10.8MB

                        • memory/3528-147-0x00007FFA04DF0000-0x00007FFA058B1000-memory.dmp
                          Filesize

                          10.8MB

                        • memory/5112-138-0x0000000000000000-mapping.dmp