Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-09-2022 05:38

General

  • Target

    150c37f09606d999aed77f1621657847.exe

  • Size

    422KB

  • MD5

    150c37f09606d999aed77f1621657847

  • SHA1

    a75789d5c83d6b2605dc1565f9af298610c557ec

  • SHA256

    1727599b52e24b71b4dc2e5e752f653bd9160dc77d6734bd0686bae753b0e362

  • SHA512

    55143a949d24649a7520c621f97c132e1f3aaa40a943096c78b43c021a7e22ef7f424d5d0eb3b4a95f6917deb44e33198c4be047d80630bc318d7f8f42de2e86

  • SSDEEP

    12288:GENN+T5xYrllrU7QY6MGmp13LEiX5QypIUbMp6OHf:K5xolYQY65mp13LEiX5QypIUbMp6OHf

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5651446034:AAHNSrQ1aoBX2vvQwJ01g6tQEdX-Me4aDUI/sendMessage?chat_id=5529858195

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\150c37f09606d999aed77f1621657847.exe
    "C:\Users\Admin\AppData\Local\Temp\150c37f09606d999aed77f1621657847.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4572
    • \??\c:\users\admin\appdata\local\temp\150c37f09606d999aed77f1621657847.exe 
      c:\users\admin\appdata\local\temp\150c37f09606d999aed77f1621657847.exe 
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2516
      • 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:5024
    • 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:4624
      • \??\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:1452
        • \??\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:552
          • \??\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:1648
            • \??\c:\windows\system\spoolsv.exe
              c:\windows\system\spoolsv.exe PR
              6⤵
              • Executes dropped EXE
              • Suspicious use of SetWindowsHookEx
              PID:4060
            • C:\Windows\SysWOW64\at.exe
              at 07:40 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
              6⤵
                PID:3572
              • C:\Windows\SysWOW64\at.exe
                at 07:41 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
                6⤵
                  PID:4192
                • C:\Windows\SysWOW64\at.exe
                  at 07:42 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
                  6⤵
                    PID:1240

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\150c37f09606d999aed77f1621657847.exe 

          Filesize

          148KB

          MD5

          e3068eb1d0819d70dbb830c864faf808

          SHA1

          2892ecde052f9aefd92363c216031738335afae1

          SHA256

          a2543d4afd149df2bac01e2a4ad78eb4351e38af81bf5345c48dce85af8960b5

          SHA512

          c32b8401b5ae049d21523dc38cc68de32bd2e0bf01e078cd1366785a9c2a8e37c750e8eda5eba2857907065a8efc6e1cd2be1e145a11ef6889942b7a80fb808e

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

          Filesize

          274KB

          MD5

          a6d1e2fe5d5c012c3343bd31a8054928

          SHA1

          9a1970f42e178d2c318910743a467edf9d118b2b

          SHA256

          03867ee368d82db829e685219b809db71b7af4e9d38676ef5abd233c385a4bb8

          SHA512

          9bc626bcc5465371048e6d193539ac954adf3d867f2005a13ca973eb234766f8c9a5573c28a9ecd697f5868ac532b89269806bf8814d5ca761ba6be17170eb27

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

          Filesize

          274KB

          MD5

          a6d1e2fe5d5c012c3343bd31a8054928

          SHA1

          9a1970f42e178d2c318910743a467edf9d118b2b

          SHA256

          03867ee368d82db829e685219b809db71b7af4e9d38676ef5abd233c385a4bb8

          SHA512

          9bc626bcc5465371048e6d193539ac954adf3d867f2005a13ca973eb234766f8c9a5573c28a9ecd697f5868ac532b89269806bf8814d5ca761ba6be17170eb27

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

          Filesize

          274KB

          MD5

          55ece4d54e75224d5753259bc3ea687c

          SHA1

          1b4765686f1daa6cfd1dc10fb6292bc1c245ee20

          SHA256

          bd471436d4b1b973a29977d272b57edd48af4e0bcf3bc730c4d35048996d8d7d

          SHA512

          072000770fcae2f969010d7b04084f94e7bc7f00371c4d624643d1075e6450e949eebc7c81b5e585ae9ae5cfd4cefaf589973b83659afec1aec9b24a2d5585a0

        • C:\Windows\System\explorer.exe

          Filesize

          274KB

          MD5

          f07567b10934b66c93b50cbef56dd971

          SHA1

          89edb13219702e0f3454912d18f63a2d391d5be5

          SHA256

          cfa8317008fea6a0c3183a962a4dbe8817efd7ddcf8aae2159acc37d36cd8cc5

          SHA512

          17ff50b1478bf191c560a89863dd4eb01c1de9d27e46f468d9d04efbe717cb4e1e7386fcd1a9744b8123693bcb9005151b2f2cf09667d7044015cae166dfadd5

        • C:\Windows\System\spoolsv.exe

          Filesize

          274KB

          MD5

          ba743b4f02a55e4aa1771ba3eac603b1

          SHA1

          608689e9328e27785dba0fa18c6f7701960bd991

          SHA256

          5445c6370e7365ecd548e259b3dfc55e2e11b3efd86f4e30f36380deb9990e8b

          SHA512

          e7123694f2d67119feaa22c602c89924f29d8aadedee0eac0cab8cf66c803c9c29184e2066f0e0069d63871c3e7dfe652e9a6a47a3ccbf63644b4e798e6dd3f3

        • C:\Windows\System\spoolsv.exe

          Filesize

          274KB

          MD5

          ba743b4f02a55e4aa1771ba3eac603b1

          SHA1

          608689e9328e27785dba0fa18c6f7701960bd991

          SHA256

          5445c6370e7365ecd548e259b3dfc55e2e11b3efd86f4e30f36380deb9990e8b

          SHA512

          e7123694f2d67119feaa22c602c89924f29d8aadedee0eac0cab8cf66c803c9c29184e2066f0e0069d63871c3e7dfe652e9a6a47a3ccbf63644b4e798e6dd3f3

        • C:\Windows\System\svchost.exe

          Filesize

          274KB

          MD5

          454b53380e57a5f808ddb3c8304938cd

          SHA1

          8cfd886c04478006b9b6c6b0abf7d7581668413d

          SHA256

          fd7853331438b4a41cc182a78029b41f59e33b091499f189d0af85971ae6bc6e

          SHA512

          54e93260e2dd1041a96140c84636bb68a657298b17c5244bf24d1aa2800b9dcc1b6ec40297a735167f7906905c68156e604c66a89d95e95e93ba372e8598f50f

        • \??\c:\users\admin\appdata\local\temp\150c37f09606d999aed77f1621657847.exe 

          Filesize

          148KB

          MD5

          e3068eb1d0819d70dbb830c864faf808

          SHA1

          2892ecde052f9aefd92363c216031738335afae1

          SHA256

          a2543d4afd149df2bac01e2a4ad78eb4351e38af81bf5345c48dce85af8960b5

          SHA512

          c32b8401b5ae049d21523dc38cc68de32bd2e0bf01e078cd1366785a9c2a8e37c750e8eda5eba2857907065a8efc6e1cd2be1e145a11ef6889942b7a80fb808e

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

          Filesize

          274KB

          MD5

          f07567b10934b66c93b50cbef56dd971

          SHA1

          89edb13219702e0f3454912d18f63a2d391d5be5

          SHA256

          cfa8317008fea6a0c3183a962a4dbe8817efd7ddcf8aae2159acc37d36cd8cc5

          SHA512

          17ff50b1478bf191c560a89863dd4eb01c1de9d27e46f468d9d04efbe717cb4e1e7386fcd1a9744b8123693bcb9005151b2f2cf09667d7044015cae166dfadd5

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

          Filesize

          274KB

          MD5

          ba743b4f02a55e4aa1771ba3eac603b1

          SHA1

          608689e9328e27785dba0fa18c6f7701960bd991

          SHA256

          5445c6370e7365ecd548e259b3dfc55e2e11b3efd86f4e30f36380deb9990e8b

          SHA512

          e7123694f2d67119feaa22c602c89924f29d8aadedee0eac0cab8cf66c803c9c29184e2066f0e0069d63871c3e7dfe652e9a6a47a3ccbf63644b4e798e6dd3f3

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

          Filesize

          274KB

          MD5

          454b53380e57a5f808ddb3c8304938cd

          SHA1

          8cfd886c04478006b9b6c6b0abf7d7581668413d

          SHA256

          fd7853331438b4a41cc182a78029b41f59e33b091499f189d0af85971ae6bc6e

          SHA512

          54e93260e2dd1041a96140c84636bb68a657298b17c5244bf24d1aa2800b9dcc1b6ec40297a735167f7906905c68156e604c66a89d95e95e93ba372e8598f50f

        • memory/552-177-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/552-174-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/1452-173-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/1452-185-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/1648-186-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/1648-175-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/4060-176-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/4572-180-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/4572-132-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/4624-179-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/4624-149-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/5024-178-0x0000000005510000-0x0000000005576000-memory.dmp

          Filesize

          408KB

        • memory/5024-183-0x0000000005DB0000-0x0000000005E4C000-memory.dmp

          Filesize

          624KB

        • memory/5024-142-0x0000000000F70000-0x0000000000F8A000-memory.dmp

          Filesize

          104KB