Analysis

  • max time kernel
    151s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-11-2022 15:19

General

  • Target

    9306afa147c0363389a99576425ab3ac0fcd73b32f60183f97104c104b896a9a.exe

  • Size

    1.0MB

  • MD5

    749a7b99749d220936b95fb6e4132bd8

  • SHA1

    8e518cc998d1fdf6978a9d283cc3f443fe87c8f0

  • SHA256

    9306afa147c0363389a99576425ab3ac0fcd73b32f60183f97104c104b896a9a

  • SHA512

    75c63302c82e827272266049ac34da50f74e971ad7c48cbe53e580317c8af099c03ebe5911ee4255366823e29365d4db433d8ca458244330c14588c0073cfdc2

  • SSDEEP

    24576:wfna/BVJI9Z+9zlmSzFpIS+1ASkw1okKIY2AyWuBAhE9QdB1d:wfuduKzlmSzFWS+10w1I3yWY3QL/

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer payload 14 IoCs
  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 1 IoCs
  • NirSoft MailPassView 6 IoCs

    Password recovery tool for various email clients

  • Nirsoft 6 IoCs
  • Executes dropped EXE 1 IoCs
  • UPX packed file 16 IoCs

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

  • Accesses Microsoft Outlook accounts 1 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 10 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 6 IoCs
  • Suspicious use of SendNotifyMessage 6 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9306afa147c0363389a99576425ab3ac0fcd73b32f60183f97104c104b896a9a.exe
    "C:\Users\Admin\AppData\Local\Temp\9306afa147c0363389a99576425ab3ac0fcd73b32f60183f97104c104b896a9a.exe"
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:3564
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\EPmfcM.exe GthbXZ
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1448
      • C:\Users\Admin\AppData\Local\Temp\EPmfcM.exe
        C:\Users\Admin\AppData\Local\Temp\EPmfcM.exe GthbXZ
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:3368
        • C:\Windows\SysWOW64\svchost.exe
          "C:\Windows\System32\svchost.exe"
          4⤵
          • UAC bypass
          • Windows security bypass
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:788
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /delete /tn WindowsUpdategthbxz0x8429524
            5⤵
              PID:2692
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /sc minute /mo 1 /tn WindowsUpdategthbxz0x8429525 /tr "C:\ProgramData\gthbxz\Project1.exe" /RL HIGHEST
              5⤵
              • Creates scheduled task(s)
              PID:2240
            • C:\Windows\SysWOW64\svchost.exe
              "C:\Windows\SysWOW64\svchost.exe"
              5⤵
              • Suspicious use of SetThreadContext
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:3808
              • C:\Windows\SysWOW64\svchost.exe
                /scomma "C:\Users\Admin\AppData\Local\Temp\KVgSwxiMPF.ini"
                6⤵
                  PID:2720
                • C:\Windows\SysWOW64\svchost.exe
                  /scomma "C:\Users\Admin\AppData\Local\Temp\sANVyPI3jI.ini"
                  6⤵
                  • Accesses Microsoft Outlook accounts
                  PID:4508
              • C:\Windows\SysWOW64\svchost.exe
                "C:\Windows\SysWOW64\svchost.exe"
                5⤵
                • Suspicious use of SetThreadContext
                • Suspicious use of SetWindowsHookEx
                • Suspicious use of WriteProcessMemory
                PID:4576
                • C:\Windows\SysWOW64\svchost.exe
                  /scomma "C:\Users\Admin\AppData\Local\Temp\7mtiSXWN9h.ini"
                  6⤵
                    PID:3984
                  • C:\Windows\SysWOW64\svchost.exe
                    /scomma "C:\Users\Admin\AppData\Local\Temp\hHLfKw1wrR.ini"
                    6⤵
                    • Accesses Microsoft Outlook accounts
                    PID:4432
                • C:\Windows\SysWOW64\svchost.exe
                  "C:\Windows\SysWOW64\svchost.exe"
                  5⤵
                  • Suspicious use of SetThreadContext
                  • Suspicious use of SetWindowsHookEx
                  • Suspicious use of WriteProcessMemory
                  PID:1932
                  • C:\Windows\SysWOW64\svchost.exe
                    /scomma "C:\Users\Admin\AppData\Local\Temp\6w9odaaVk0.ini"
                    6⤵
                      PID:3804
                    • C:\Windows\SysWOW64\svchost.exe
                      /scomma "C:\Users\Admin\AppData\Local\Temp\gOhRS8dRL5.ini"
                      6⤵
                      • Accesses Microsoft Outlook accounts
                      PID:1220

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\6w9odaaVk0.ini

            Filesize

            5B

            MD5

            d1ea279fb5559c020a1b4137dc4de237

            SHA1

            db6f8988af46b56216a6f0daf95ab8c9bdb57400

            SHA256

            fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

            SHA512

            720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

          • C:\Users\Admin\AppData\Local\Temp\7mtiSXWN9h.ini

            Filesize

            5B

            MD5

            d1ea279fb5559c020a1b4137dc4de237

            SHA1

            db6f8988af46b56216a6f0daf95ab8c9bdb57400

            SHA256

            fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

            SHA512

            720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

          • C:\Users\Admin\AppData\Local\Temp\EPmfcM.exe

            Filesize

            510KB

            MD5

            01d151ccd2a75bd713b8ce81d6509eb8

            SHA1

            c751680d504bece45dc84e363e9e976fe77a8eac

            SHA256

            a4d4dbf9e9124dbd055115706f2a2bfc8816b66cc5f52a148602f9fb0203b801

            SHA512

            8d49a4d97ef38fe5c6bb875d3bc387fade75f9a5d06a494b6a8c9d87840aa3d7cd87343e6aad268a27a9a33390bef7cd8e10d8ebe1df9f7d1ba6a68fe844107d

          • C:\Users\Admin\AppData\Local\Temp\EPmfcM.exe

            Filesize

            510KB

            MD5

            01d151ccd2a75bd713b8ce81d6509eb8

            SHA1

            c751680d504bece45dc84e363e9e976fe77a8eac

            SHA256

            a4d4dbf9e9124dbd055115706f2a2bfc8816b66cc5f52a148602f9fb0203b801

            SHA512

            8d49a4d97ef38fe5c6bb875d3bc387fade75f9a5d06a494b6a8c9d87840aa3d7cd87343e6aad268a27a9a33390bef7cd8e10d8ebe1df9f7d1ba6a68fe844107d

          • C:\Users\Admin\AppData\Local\Temp\GthbXZ

            Filesize

            10KB

            MD5

            85dbd40256d09f3a5fd5fd7cbdf8db19

            SHA1

            3d5d0f17184725fde2d71ded94d4803b1aa89820

            SHA256

            0c0107fc5e33e565e7f809cbd8594fa32f3af60a9d653dea8dc0e5683b29bcc2

            SHA512

            0d525c604b52204ddb863106108fba43086b6a37c822a4683f71d7eaedff277af589aeb84cfc3fe1f05f54ef715d9758ce8ed52b6fa1b10e26074f8904e5657a

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

            Filesize

            5B

            MD5

            d1ea279fb5559c020a1b4137dc4de237

            SHA1

            db6f8988af46b56216a6f0daf95ab8c9bdb57400

            SHA256

            fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

            SHA512

            720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

          • C:\Users\Admin\AppData\Local\Temp\tbZHJv.txt

            Filesize

            1.3MB

            MD5

            c97f91a4e75191206ba81d08b3ff2e26

            SHA1

            19c8a3a61a2577145d48f27caed911903bfe8704

            SHA256

            9564205a71241b9bd94c4d94d48f211fd09d85e82defeafc19f4b56824e50040

            SHA512

            01d761bd1c4a8430b86b029ea52cd42eab67cfbd0511c0da251bc8291c7c567360cab45c4188d3012a3fd897b9fb4a19d09a6aad01c42b422f0589594266738d

          • memory/788-139-0x0000000000400000-0x00000000004A1000-memory.dmp

            Filesize

            644KB

          • memory/788-141-0x0000000000400000-0x00000000004A1000-memory.dmp

            Filesize

            644KB

          • memory/788-144-0x0000000000400000-0x00000000004A1000-memory.dmp

            Filesize

            644KB

          • memory/788-188-0x0000000000400000-0x00000000004A1000-memory.dmp

            Filesize

            644KB

          • memory/1220-212-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/1932-215-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/1932-185-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/1932-192-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/2720-157-0x0000000000400000-0x0000000000453000-memory.dmp

            Filesize

            332KB

          • memory/2720-156-0x0000000000400000-0x0000000000453000-memory.dmp

            Filesize

            332KB

          • memory/2720-158-0x0000000000400000-0x0000000000453000-memory.dmp

            Filesize

            332KB

          • memory/2720-154-0x0000000000400000-0x0000000000453000-memory.dmp

            Filesize

            332KB

          • memory/3804-184-0x0000000000400000-0x0000000000453000-memory.dmp

            Filesize

            332KB

          • memory/3808-213-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/3808-148-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/3808-190-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/3808-150-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/3808-159-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/3984-171-0x0000000000400000-0x0000000000453000-memory.dmp

            Filesize

            332KB

          • memory/3984-170-0x0000000000400000-0x0000000000453000-memory.dmp

            Filesize

            332KB

          • memory/3984-169-0x0000000000400000-0x0000000000453000-memory.dmp

            Filesize

            332KB

          • memory/4432-205-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/4432-206-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/4508-196-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/4508-197-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/4508-198-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/4508-199-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/4508-194-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/4576-191-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/4576-172-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/4576-214-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB