Analysis

  • max time kernel
    150s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-09-2022 22:48

General

  • Target

    1727599b52e24b71b4dc2e5e752f653bd9160dc77d6734bd0686bae753b0e362.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\1727599b52e24b71b4dc2e5e752f653bd9160dc77d6734bd0686bae753b0e362.exe
    "C:\Users\Admin\AppData\Local\Temp\1727599b52e24b71b4dc2e5e752f653bd9160dc77d6734bd0686bae753b0e362.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2472
    • \??\c:\users\admin\appdata\local\temp\1727599b52e24b71b4dc2e5e752f653bd9160dc77d6734bd0686bae753b0e362.exe 
      c:\users\admin\appdata\local\temp\1727599b52e24b71b4dc2e5e752f653bd9160dc77d6734bd0686bae753b0e362.exe 
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3708
      • 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:4908
    • 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:4832
      • \??\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:4568
        • \??\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:1944
          • \??\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:5020
            • \??\c:\windows\system\spoolsv.exe
              c:\windows\system\spoolsv.exe PR
              6⤵
              • Executes dropped EXE
              • Suspicious use of SetWindowsHookEx
              PID:5036
            • C:\Windows\SysWOW64\at.exe
              at 00:50 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
              6⤵
                PID:1584
              • C:\Windows\SysWOW64\at.exe
                at 00:51 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
                6⤵
                  PID:2304
                • C:\Windows\SysWOW64\at.exe
                  at 00:52 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
                  6⤵
                    PID:2560

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\1727599b52e24b71b4dc2e5e752f653bd9160dc77d6734bd0686bae753b0e362.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

          0196028090bcee79b58c18ff0e14a5fd

          SHA1

          893d0feef8b5535ec70edcce14fb3a33a4323d93

          SHA256

          0dfba868eb9c90c7343d7fb8b6865e3421319ad15f4efaead0d0e6cd5b74cf0b

          SHA512

          b273d2bfd6202ebed8334af12ac344db5ff1a81cf0890f11c88d4ede2c0db833bc31297b53a2c597a01dd7134f65bc3f6a4131473fcc092d8edf4e6b6de6a14c

        • C:\Windows\System\explorer.exe

          Filesize

          274KB

          MD5

          ce1a4776eaf23b447bf21eecd7639924

          SHA1

          e0cda15e39af48995444ab9e581a322463407b7d

          SHA256

          4d763e9ffca92a893fbfc0b06cbea3073e90f38ec0759eab2d374b68caa9708d

          SHA512

          33387c984768edeb3ae9d96ecc537582e9313296a5352f9ee64d22c8d08188d99d893fbf576b9bfaf0b7d250f47e54abc42a1cc45ed568eac129b08bc1b918fd

        • C:\Windows\System\spoolsv.exe

          Filesize

          274KB

          MD5

          01c3b2c261c6bac40aff6528d1113275

          SHA1

          5af897ed2f44f209b32cd7e74df8713edf848a80

          SHA256

          1784d47685dabba5287236e02a941d24dcd784cd92f35babafae5e9c8dec0c9e

          SHA512

          6d692ee91fdc37afd80197ee0ae188f6cd64499d6ef98a87605438b5be5bfdd42716d19b8ccb46db402fda00f04ef998b582050e9e37b2748ca07302acf57922

        • C:\Windows\System\spoolsv.exe

          Filesize

          274KB

          MD5

          01c3b2c261c6bac40aff6528d1113275

          SHA1

          5af897ed2f44f209b32cd7e74df8713edf848a80

          SHA256

          1784d47685dabba5287236e02a941d24dcd784cd92f35babafae5e9c8dec0c9e

          SHA512

          6d692ee91fdc37afd80197ee0ae188f6cd64499d6ef98a87605438b5be5bfdd42716d19b8ccb46db402fda00f04ef998b582050e9e37b2748ca07302acf57922

        • C:\Windows\System\svchost.exe

          Filesize

          274KB

          MD5

          5e4f1a02dad86170009d3c44683d5a7b

          SHA1

          f31e8a7b6c08baa60c4dae153192aa5c7e1bb01f

          SHA256

          e8608f33d8319e0baa4a9aa6512240eaf390a89b6a69dfe0ab9efd5825c220a6

          SHA512

          b30eb7e45b1b1dd2d6df0f4ace787577edfddb67696354b33f11cd8ae62024c2eeb37a97b069c0809ffbad33fdf142e9888f5297ad7e5229b9c8e95f0c3023fd

        • \??\c:\users\admin\appdata\local\temp\1727599b52e24b71b4dc2e5e752f653bd9160dc77d6734bd0686bae753b0e362.exe 

          Filesize

          148KB

          MD5

          e3068eb1d0819d70dbb830c864faf808

          SHA1

          2892ecde052f9aefd92363c216031738335afae1

          SHA256

          a2543d4afd149df2bac01e2a4ad78eb4351e38af81bf5345c48dce85af8960b5

          SHA512

          c32b8401b5ae049d21523dc38cc68de32bd2e0bf01e078cd1366785a9c2a8e37c750e8eda5eba2857907065a8efc6e1cd2be1e145a11ef6889942b7a80fb808e

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

          Filesize

          274KB

          MD5

          ce1a4776eaf23b447bf21eecd7639924

          SHA1

          e0cda15e39af48995444ab9e581a322463407b7d

          SHA256

          4d763e9ffca92a893fbfc0b06cbea3073e90f38ec0759eab2d374b68caa9708d

          SHA512

          33387c984768edeb3ae9d96ecc537582e9313296a5352f9ee64d22c8d08188d99d893fbf576b9bfaf0b7d250f47e54abc42a1cc45ed568eac129b08bc1b918fd

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

          Filesize

          274KB

          MD5

          01c3b2c261c6bac40aff6528d1113275

          SHA1

          5af897ed2f44f209b32cd7e74df8713edf848a80

          SHA256

          1784d47685dabba5287236e02a941d24dcd784cd92f35babafae5e9c8dec0c9e

          SHA512

          6d692ee91fdc37afd80197ee0ae188f6cd64499d6ef98a87605438b5be5bfdd42716d19b8ccb46db402fda00f04ef998b582050e9e37b2748ca07302acf57922

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

          Filesize

          274KB

          MD5

          5e4f1a02dad86170009d3c44683d5a7b

          SHA1

          f31e8a7b6c08baa60c4dae153192aa5c7e1bb01f

          SHA256

          e8608f33d8319e0baa4a9aa6512240eaf390a89b6a69dfe0ab9efd5825c220a6

          SHA512

          b30eb7e45b1b1dd2d6df0f4ace787577edfddb67696354b33f11cd8ae62024c2eeb37a97b069c0809ffbad33fdf142e9888f5297ad7e5229b9c8e95f0c3023fd

        • memory/1944-175-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/2472-132-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/2472-177-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/4568-183-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/4832-176-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/4832-152-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/4908-142-0x0000000000B60000-0x0000000000B7A000-memory.dmp

          Filesize

          104KB

        • memory/4908-181-0x0000000005DE0000-0x0000000005E7C000-memory.dmp

          Filesize

          624KB

        • memory/4908-159-0x00000000053F0000-0x0000000005456000-memory.dmp

          Filesize

          408KB

        • memory/5020-180-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB

        • memory/5036-174-0x0000000000400000-0x000000000043E000-memory.dmp

          Filesize

          248KB