Analysis

  • max time kernel
    152s
  • max time network
    142s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-11-2022 16:04

General

  • Target

    51a979eedcdc9805fe0f11f557b28baeb9950cb1a2afca366a0b37e2a7842b6e.exe

  • Size

    346KB

  • MD5

    88e068c8b28cbb25850714649ec0c2c0

  • SHA1

    6da8fcb73665f1f3fde8ecaaaf80970ade5bf9a7

  • SHA256

    51a979eedcdc9805fe0f11f557b28baeb9950cb1a2afca366a0b37e2a7842b6e

  • SHA512

    b43ea670528b26bf48e50f3048173f6a73efc1b292d46a7397b3fe5a43d9bb7bd3ff76a3a59a48636fb63861156417dffc5a137da8001f1869cac0822bb3429c

  • SSDEEP

    6144:kplf4SltGiDOE961LDGoMNgFiqoJdJx1FNmZoOb/tXLcfv2mAJdXgy21:Ofhlt7DOE961LDGtLfqZoOj1LYAJdB

Malware Config

Signatures

  • ISR Stealer

    ISR Stealer is a modified version of Hackhound Stealer written in visual basic.

  • ISR Stealer payload 6 IoCs
  • NirSoft MailPassView 4 IoCs

    Password recovery tool for various email clients

  • Nirsoft 4 IoCs
  • Executes dropped EXE 3 IoCs
  • UPX packed file 16 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Uses the VBS compiler for execution 1 TTPs
  • Accesses Microsoft Outlook accounts 1 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 6 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 55 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\51a979eedcdc9805fe0f11f557b28baeb9950cb1a2afca366a0b37e2a7842b6e.exe
    "C:\Users\Admin\AppData\Local\Temp\51a979eedcdc9805fe0f11f557b28baeb9950cb1a2afca366a0b37e2a7842b6e.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:488
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3604
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
        /scomma "C:\Users\Admin\AppData\Local\Temp\YosbN5vw1P.ini"
        3⤵
          PID:4128
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
          /scomma "C:\Users\Admin\AppData\Local\Temp\hnIJtk6Bde.ini"
          3⤵
          • Accesses Microsoft Outlook accounts
          PID:1212
      • C:\Users\Admin\AppData\Roaming\Microsoft\AeLookupSvi.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\AeLookupSvi.exe"
        2⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Adds Run key to start application
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4964
        • C:\Users\Admin\AppData\Roaming\Microsoft\ProfSvc.exe
          "C:\Users\Admin\AppData\Roaming\Microsoft\ProfSvc.exe"
          3⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Suspicious use of SetThreadContext
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1268
          • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
            "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
            4⤵
            • Suspicious use of SetThreadContext
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:1052
            • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
              /scomma "C:\Users\Admin\AppData\Local\Temp\DrTWV27J1x.ini"
              5⤵
                PID:4796
              • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
                /scomma "C:\Users\Admin\AppData\Local\Temp\PWQxtsHufv.ini"
                5⤵
                • Accesses Microsoft Outlook accounts
                PID:4752
            • C:\Users\Admin\AppData\Roaming\Microsoft\AeLookupSvi.exe
              "C:\Users\Admin\AppData\Roaming\Microsoft\AeLookupSvi.exe"
              4⤵
              • Executes dropped EXE
              • Adds Run key to start application
              • Suspicious use of AdjustPrivilegeToken
              PID:5100

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\AeLookupSvi.exe.log

        Filesize

        128B

        MD5

        a5dcc7c9c08af7dddd82be5b036a4416

        SHA1

        4f998ca1526d199e355ffb435bae111a2779b994

        SHA256

        e24033ceec97fd03402b03acaaabd1d1e378e83bb1683afbccac760e00f8ead5

        SHA512

        56035de734836c0c39f0b48641c51c26adb6e79c6c65e23ca96603f71c95b8673e2ef853146e87efc899dd1878d0bbc2c82d91fbf0fce81c552048e986f9bb5a

      • C:\Users\Admin\AppData\Local\Temp\DrTWV27J1x.ini

        Filesize

        5B

        MD5

        d1ea279fb5559c020a1b4137dc4de237

        SHA1

        db6f8988af46b56216a6f0daf95ab8c9bdb57400

        SHA256

        fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

        SHA512

        720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

      • C:\Users\Admin\AppData\Local\Temp\YosbN5vw1P.ini

        Filesize

        5B

        MD5

        d1ea279fb5559c020a1b4137dc4de237

        SHA1

        db6f8988af46b56216a6f0daf95ab8c9bdb57400

        SHA256

        fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

        SHA512

        720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

      • C:\Users\Admin\AppData\Roaming\Microsoft\AeLookupSvi.exe

        Filesize

        7KB

        MD5

        54b446b04c83570cc974ed428b416a63

        SHA1

        f6e9eb6319a45d381baef998ce45e50f247cbc7d

        SHA256

        ead396edbe63927c734b30f9275e52c4dde8fd3c1e53963cfdafb24f53e9fab4

        SHA512

        0d0129553c623c107d70d756c1d023f8f4463cd6d6517639e5ca2c79944285cfd23dffe98a3ca6c12b9d33501830de05c599d89d12a3ae5514ddd6c18b28e939

      • C:\Users\Admin\AppData\Roaming\Microsoft\AeLookupSvi.exe

        Filesize

        7KB

        MD5

        54b446b04c83570cc974ed428b416a63

        SHA1

        f6e9eb6319a45d381baef998ce45e50f247cbc7d

        SHA256

        ead396edbe63927c734b30f9275e52c4dde8fd3c1e53963cfdafb24f53e9fab4

        SHA512

        0d0129553c623c107d70d756c1d023f8f4463cd6d6517639e5ca2c79944285cfd23dffe98a3ca6c12b9d33501830de05c599d89d12a3ae5514ddd6c18b28e939

      • C:\Users\Admin\AppData\Roaming\Microsoft\AeLookupSvi.exe

        Filesize

        7KB

        MD5

        54b446b04c83570cc974ed428b416a63

        SHA1

        f6e9eb6319a45d381baef998ce45e50f247cbc7d

        SHA256

        ead396edbe63927c734b30f9275e52c4dde8fd3c1e53963cfdafb24f53e9fab4

        SHA512

        0d0129553c623c107d70d756c1d023f8f4463cd6d6517639e5ca2c79944285cfd23dffe98a3ca6c12b9d33501830de05c599d89d12a3ae5514ddd6c18b28e939

      • C:\Users\Admin\AppData\Roaming\Microsoft\AeLookupSvi.exe

        Filesize

        7KB

        MD5

        54b446b04c83570cc974ed428b416a63

        SHA1

        f6e9eb6319a45d381baef998ce45e50f247cbc7d

        SHA256

        ead396edbe63927c734b30f9275e52c4dde8fd3c1e53963cfdafb24f53e9fab4

        SHA512

        0d0129553c623c107d70d756c1d023f8f4463cd6d6517639e5ca2c79944285cfd23dffe98a3ca6c12b9d33501830de05c599d89d12a3ae5514ddd6c18b28e939

      • C:\Users\Admin\AppData\Roaming\Microsoft\ProfSvc.exe

        Filesize

        346KB

        MD5

        88e068c8b28cbb25850714649ec0c2c0

        SHA1

        6da8fcb73665f1f3fde8ecaaaf80970ade5bf9a7

        SHA256

        51a979eedcdc9805fe0f11f557b28baeb9950cb1a2afca366a0b37e2a7842b6e

        SHA512

        b43ea670528b26bf48e50f3048173f6a73efc1b292d46a7397b3fe5a43d9bb7bd3ff76a3a59a48636fb63861156417dffc5a137da8001f1869cac0822bb3429c

      • C:\Users\Admin\AppData\Roaming\Microsoft\ProfSvc.exe

        Filesize

        346KB

        MD5

        88e068c8b28cbb25850714649ec0c2c0

        SHA1

        6da8fcb73665f1f3fde8ecaaaf80970ade5bf9a7

        SHA256

        51a979eedcdc9805fe0f11f557b28baeb9950cb1a2afca366a0b37e2a7842b6e

        SHA512

        b43ea670528b26bf48e50f3048173f6a73efc1b292d46a7397b3fe5a43d9bb7bd3ff76a3a59a48636fb63861156417dffc5a137da8001f1869cac0822bb3429c

      • memory/488-133-0x0000000074840000-0x0000000074DF1000-memory.dmp

        Filesize

        5.7MB

      • memory/488-167-0x0000000074840000-0x0000000074DF1000-memory.dmp

        Filesize

        5.7MB

      • memory/488-132-0x0000000074840000-0x0000000074DF1000-memory.dmp

        Filesize

        5.7MB

      • memory/1052-184-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/1052-193-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/1212-156-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/1212-154-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/1212-157-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/1212-158-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/1268-165-0x0000000074840000-0x0000000074DF1000-memory.dmp

        Filesize

        5.7MB

      • memory/1268-166-0x0000000074840000-0x0000000074DF1000-memory.dmp

        Filesize

        5.7MB

      • memory/3604-160-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/3604-144-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/3604-159-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/3604-135-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/4128-147-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/4128-146-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/4128-140-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/4128-142-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/4128-143-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/4128-145-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/4752-190-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/4752-192-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/4752-191-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/4796-177-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/4796-178-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/4796-180-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/4964-168-0x0000000074840000-0x0000000074DF1000-memory.dmp

        Filesize

        5.7MB

      • memory/4964-161-0x0000000074840000-0x0000000074DF1000-memory.dmp

        Filesize

        5.7MB

      • memory/4964-151-0x0000000074840000-0x0000000074DF1000-memory.dmp

        Filesize

        5.7MB

      • memory/5100-185-0x0000000074840000-0x0000000074DF1000-memory.dmp

        Filesize

        5.7MB

      • memory/5100-194-0x0000000074840000-0x0000000074DF1000-memory.dmp

        Filesize

        5.7MB