Analysis

  • max time kernel
    151s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-08-2022 13:30

General

  • Target

    4a4d5455c9e941082c8c08a96102afc9d33abc40985bfcc00b6bee8c098066fd.exe

  • Size

    406KB

  • MD5

    d617cfaf2f5cfcb5c50ecc28d0d02582

  • SHA1

    63a2d370a2c0ef547cc7a78e220e0d9021e2b4a1

  • SHA256

    4a4d5455c9e941082c8c08a96102afc9d33abc40985bfcc00b6bee8c098066fd

  • SHA512

    857a130effc4aca8d5cebaaa78eace06242e7f96332553f5676f4670fdfdab45eed3306475d8e3a9ad7facf4e3b5cceac9aeb7e25c394a82324499e0b78fe8f0

Malware Config

Signatures

  • BluStealer

    A Modular information stealer written in Visual Basic.

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
  • StormKitty

    StormKitty is an open source info stealer written in C#.

  • StormKitty payload 1 IoCs
  • Executes dropped EXE 6 IoCs
  • Modifies Installed Components in the registry 2 TTPs 8 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 6 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 1 IoCs
  • Drops file in Windows directory 6 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: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 15 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4a4d5455c9e941082c8c08a96102afc9d33abc40985bfcc00b6bee8c098066fd.exe
    "C:\Users\Admin\AppData\Local\Temp\4a4d5455c9e941082c8c08a96102afc9d33abc40985bfcc00b6bee8c098066fd.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4864
    • \??\c:\users\admin\appdata\local\temp\4a4d5455c9e941082c8c08a96102afc9d33abc40985bfcc00b6bee8c098066fd.exe 
      c:\users\admin\appdata\local\temp\4a4d5455c9e941082c8c08a96102afc9d33abc40985bfcc00b6bee8c098066fd.exe 
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1516
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
        3⤵
        • Accesses Microsoft Outlook profiles
        • Checks processor information in registry
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:4920
    • C:\Users\Admin\AppData\Local\icsys.icn.exe
      C:\Users\Admin\AppData\Local\icsys.icn.exe
      2⤵
      • Executes dropped EXE
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4992
      • \??\c:\windows\system\explorer.exe
        c:\windows\system\explorer.exe
        3⤵
        • Modifies WinLogon for persistence
        • Modifies visiblity of hidden/system files in Explorer
        • Executes dropped EXE
        • Modifies Installed Components in the registry
        • Adds Run key to start application
        • Drops file in Windows directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:740
        • \??\c:\windows\system\spoolsv.exe
          c:\windows\system\spoolsv.exe SE
          4⤵
          • Executes dropped EXE
          • Drops file in Windows directory
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:3796
          • \??\c:\windows\system\svchost.exe
            c:\windows\system\svchost.exe
            5⤵
            • Modifies WinLogon for persistence
            • Modifies visiblity of hidden/system files in Explorer
            • Executes dropped EXE
            • Modifies Installed Components in the registry
            • Adds Run key to start application
            • Drops file in Windows directory
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:2280
            • \??\c:\windows\system\spoolsv.exe
              c:\windows\system\spoolsv.exe PR
              6⤵
              • Executes dropped EXE
              • Suspicious use of SetWindowsHookEx
              PID:5060
            • C:\Windows\SysWOW64\at.exe
              at 13:32 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
              6⤵
                PID:344
              • C:\Windows\SysWOW64\at.exe
                at 13:33 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
                6⤵
                  PID:4916
                • C:\Windows\SysWOW64\at.exe
                  at 13:34 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
                  6⤵
                    PID:3372

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\4a4d5455c9e941082c8c08a96102afc9d33abc40985bfcc00b6bee8c098066fd.exe 

          Filesize

          132KB

          MD5

          bee47439c4960e2728594ece9ad95ba7

          SHA1

          43f4b6f607dec5bec2a33e2fb4148c38de832490

          SHA256

          8a1902d9c0dbe388b28ef5a9c8ec4c0f1802fc6ccd43471ea337dcb3d71c81d4

          SHA512

          ad84d419d61b63e36a6766ba90773b39270bf9c8e72373b52c1979097e73110f749fad0cfed5c4f233304ad0af4b6e753666911ff7db83475c16c38976c46382

        • C:\Users\Admin\AppData\Local\icsys.icn.exe

          Filesize

          274KB

          MD5

          7f9ebd4ed2db0d66c4be272c681bad48

          SHA1

          cefdff7b1cb786ff84458e6e16b1e2ead35f9c34

          SHA256

          d4fdf7e61db35ab2f6cbaaa4c02a9336b29d653e7249247a74c4f6fa787768b0

          SHA512

          627d9ae1a7cce0d4f3859034bd2224ea27ad1cd0d2d7592886e147ea7806de31d9bfd7a0aa4d955eb2854247b2029bd835e5b420d275f0616803efe3eec60997

        • C:\Users\Admin\AppData\Local\icsys.icn.exe

          Filesize

          274KB

          MD5

          7f9ebd4ed2db0d66c4be272c681bad48

          SHA1

          cefdff7b1cb786ff84458e6e16b1e2ead35f9c34

          SHA256

          d4fdf7e61db35ab2f6cbaaa4c02a9336b29d653e7249247a74c4f6fa787768b0

          SHA512

          627d9ae1a7cce0d4f3859034bd2224ea27ad1cd0d2d7592886e147ea7806de31d9bfd7a0aa4d955eb2854247b2029bd835e5b420d275f0616803efe3eec60997

        • C:\Users\Admin\AppData\Roaming\mrsys.exe

          Filesize

          274KB

          MD5

          2f09bf4dbd5a213af6653981ade15c88

          SHA1

          b07706a0bbf57a511c1586645c25d1b619eb8b78

          SHA256

          cf221d20e1c3a4d8a2cac887d1cbc21c1a1a083b77620127c1ae6a52468dbdbb

          SHA512

          f6c8759db2b3d40931ca1e31086f19af825c89e96bcc43201a397e1fb52fdc27bc66818c5de3f84488e405a5397fdf4f5d8621e70f45dfe5f55d558126a33a67

        • C:\Windows\System\explorer.exe

          Filesize

          274KB

          MD5

          49346e85bca0adaf38b9ea8b5b82b823

          SHA1

          c1d4e32b35d2b09650aaf9db9c032affc1947d18

          SHA256

          9c6d647d6f660f2c4a5cae96abbacab6afcba229dbbe88655106e9f3fa63dc38

          SHA512

          7ccbd8c5dfe3cbb823eccc96d9e08187ad35bfe3f9deff388bce55d31d36cac6c6ba96258448f9f9fa860b75a55fa9ecfae0c100106f3b3d540ab2a65179336a

        • C:\Windows\System\spoolsv.exe

          Filesize

          274KB

          MD5

          55cb0805361889d4e41d441799b227cd

          SHA1

          4555b71c36cab5bc7801862fdb663dd0e09f46cd

          SHA256

          1a0b9c69a64bb048de85b4e21cbc84c2733a02cdab6ed0aa4ba2ce2a2a0a2b3a

          SHA512

          cdce109e1711c6f1fb4ed704cfce5bad8dec92373493e3f1a1a31ea0f7a593d17be277e80850abaf1f549562c34954ff6a649462599d4788f0b6c4d4e0b2683a

        • C:\Windows\System\spoolsv.exe

          Filesize

          274KB

          MD5

          55cb0805361889d4e41d441799b227cd

          SHA1

          4555b71c36cab5bc7801862fdb663dd0e09f46cd

          SHA256

          1a0b9c69a64bb048de85b4e21cbc84c2733a02cdab6ed0aa4ba2ce2a2a0a2b3a

          SHA512

          cdce109e1711c6f1fb4ed704cfce5bad8dec92373493e3f1a1a31ea0f7a593d17be277e80850abaf1f549562c34954ff6a649462599d4788f0b6c4d4e0b2683a

        • C:\Windows\System\svchost.exe

          Filesize

          274KB

          MD5

          ba26220b46004908fd2d1e919aa1b27c

          SHA1

          6b36574c425c3c4d76c89ba1f40dfedd883664f1

          SHA256

          c0bca552daf9c2516e448a49b0f644be35ceaf157797df8e3e19725bedd47ba8

          SHA512

          e2c14b48d8bbae5c766187a35a02b89b477b8c7aa64375d59792e0355047dffed69c3e13432f3c06300701b706b0e5b72499b0071ee1853cee1e5b0f3d3b3977

        • \??\c:\users\admin\appdata\local\temp\4a4d5455c9e941082c8c08a96102afc9d33abc40985bfcc00b6bee8c098066fd.exe 

          Filesize

          132KB

          MD5

          bee47439c4960e2728594ece9ad95ba7

          SHA1

          43f4b6f607dec5bec2a33e2fb4148c38de832490

          SHA256

          8a1902d9c0dbe388b28ef5a9c8ec4c0f1802fc6ccd43471ea337dcb3d71c81d4

          SHA512

          ad84d419d61b63e36a6766ba90773b39270bf9c8e72373b52c1979097e73110f749fad0cfed5c4f233304ad0af4b6e753666911ff7db83475c16c38976c46382

        • \??\c:\windows\system\explorer.exe

          Filesize

          274KB

          MD5

          49346e85bca0adaf38b9ea8b5b82b823

          SHA1

          c1d4e32b35d2b09650aaf9db9c032affc1947d18

          SHA256

          9c6d647d6f660f2c4a5cae96abbacab6afcba229dbbe88655106e9f3fa63dc38

          SHA512

          7ccbd8c5dfe3cbb823eccc96d9e08187ad35bfe3f9deff388bce55d31d36cac6c6ba96258448f9f9fa860b75a55fa9ecfae0c100106f3b3d540ab2a65179336a

        • \??\c:\windows\system\spoolsv.exe

          Filesize

          274KB

          MD5

          55cb0805361889d4e41d441799b227cd

          SHA1

          4555b71c36cab5bc7801862fdb663dd0e09f46cd

          SHA256

          1a0b9c69a64bb048de85b4e21cbc84c2733a02cdab6ed0aa4ba2ce2a2a0a2b3a

          SHA512

          cdce109e1711c6f1fb4ed704cfce5bad8dec92373493e3f1a1a31ea0f7a593d17be277e80850abaf1f549562c34954ff6a649462599d4788f0b6c4d4e0b2683a

        • \??\c:\windows\system\svchost.exe

          Filesize

          274KB

          MD5

          ba26220b46004908fd2d1e919aa1b27c

          SHA1

          6b36574c425c3c4d76c89ba1f40dfedd883664f1

          SHA256

          c0bca552daf9c2516e448a49b0f644be35ceaf157797df8e3e19725bedd47ba8

          SHA512

          e2c14b48d8bbae5c766187a35a02b89b477b8c7aa64375d59792e0355047dffed69c3e13432f3c06300701b706b0e5b72499b0071ee1853cee1e5b0f3d3b3977

        • memory/740-162-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/740-185-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/2280-182-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/3796-164-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/3796-178-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/4864-135-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/4864-177-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/4920-158-0x0000000005270000-0x00000000052D6000-memory.dmp

          Filesize

          408KB

        • memory/4920-183-0x0000000005C40000-0x0000000005CDC000-memory.dmp

          Filesize

          624KB

        • memory/4920-142-0x0000000000D00000-0x0000000000D1A000-memory.dmp

          Filesize

          104KB

        • memory/4992-161-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/4992-179-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/5060-176-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB