Analysis

  • max time kernel
    151s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231020-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231020-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08-11-2023 01:40

General

  • Target

    NEAS.b1b7840a85f47492bd18a14f259271c0.exe

  • Size

    487KB

  • MD5

    b1b7840a85f47492bd18a14f259271c0

  • SHA1

    2e4857ca0af00740f2b592eb06607821cef8ecf0

  • SHA256

    b069c79498e11412e2b2725479aee383a1a785c8f2bc32e6bcb0fd78de51f5dc

  • SHA512

    9096bb99397ed9dc7c7fb5118c85e06b80ad7c3b1c1da9b5dbf82446f1f3f37af8bf4638a7b062b16b31a32a113277f94641602c279d702f96acc8983ffef07a

  • SSDEEP

    12288:Pz9ruEtMylb/u7nZxFRD8q4hU0IJDqNC5eR:1uEthl0nRpV0+qN

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer payload 7 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • Nirsoft 2 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • UPX packed file 14 IoCs

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

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 6 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\NEAS.b1b7840a85f47492bd18a14f259271c0.exe
    "C:\Users\Admin\AppData\Local\Temp\NEAS.b1b7840a85f47492bd18a14f259271c0.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4940
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c copy "C:\Users\Admin\AppData\Local\Temp\NEAS.b1b7840a85f47492bd18a14f259271c0.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dslsvc.exe"
      2⤵
        PID:4316
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4184
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
          /scomma "C:\Users\Admin\AppData\Local\Temp\AQapagRXui.ini"
          3⤵
            PID:2320
          • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
            /scomma "C:\Users\Admin\AppData\Local\Temp\HqjKtWLmtg.ini"
            3⤵
              PID:4860
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 4860 -s 80
                4⤵
                • Program crash
                PID:4708
          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\isshost.exe
            C:\Users\Admin\AppData\Roaming\Microsoft\Windows\isshost.exe
            2⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:4952
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v "Load" /d "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\isshost.exe" /f
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:2936
              • C:\Windows\SysWOW64\reg.exe
                reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v "Load" /d "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\isshost.exe" /f
                4⤵
                  PID:4128
              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dslsvc.exe
                "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dslsvc.exe"
                3⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of WriteProcessMemory
                PID:524
                • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
                  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
                  4⤵
                  • Suspicious use of SetThreadContext
                  • Suspicious use of SetWindowsHookEx
                  • Suspicious use of WriteProcessMemory
                  PID:4264
                  • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
                    /scomma "C:\Users\Admin\AppData\Local\Temp\DBj6YPSwE5.ini"
                    5⤵
                      PID:3868
                    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
                      /scomma "C:\Users\Admin\AppData\Local\Temp\s4yjHcEUb2.ini"
                      5⤵
                      • Accesses Microsoft Outlook accounts
                      PID:2940
                  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\isshost.exe
                    C:\Users\Admin\AppData\Roaming\Microsoft\Windows\isshost.exe
                    4⤵
                    • Executes dropped EXE
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:3296
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4860 -ip 4860
              1⤵
                PID:2160

              Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

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

                Filesize

                308B

                MD5

                1941623a471e15f0e2ca7dbadd577fdc

                SHA1

                f7df5d8a54a66191bb1a4518c9cddb3fd61f225b

                SHA256

                19a17b2ee8664b5dc68810ee4bca9bfe4370ce7bd3d640fa3bd0fa03efc45f6f

                SHA512

                6e33e3955340711e3e36c36c30eb869003e361083eed1f3ca914d1085f9477a1f9f94010b9834e8ec5580de8ddb33c3256791d5f6fd7c3a1636c6963de309e71

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

                Filesize

                5B

                MD5

                d1ea279fb5559c020a1b4137dc4de237

                SHA1

                db6f8988af46b56216a6f0daf95ab8c9bdb57400

                SHA256

                fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

                SHA512

                720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

              • C:\Users\Admin\AppData\Local\Temp\DBj6YPSwE5.ini

                Filesize

                5B

                MD5

                d1ea279fb5559c020a1b4137dc4de237

                SHA1

                db6f8988af46b56216a6f0daf95ab8c9bdb57400

                SHA256

                fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

                SHA512

                720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dslsvc.exe

                Filesize

                487KB

                MD5

                b1b7840a85f47492bd18a14f259271c0

                SHA1

                2e4857ca0af00740f2b592eb06607821cef8ecf0

                SHA256

                b069c79498e11412e2b2725479aee383a1a785c8f2bc32e6bcb0fd78de51f5dc

                SHA512

                9096bb99397ed9dc7c7fb5118c85e06b80ad7c3b1c1da9b5dbf82446f1f3f37af8bf4638a7b062b16b31a32a113277f94641602c279d702f96acc8983ffef07a

              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dslsvc.exe

                Filesize

                487KB

                MD5

                b1b7840a85f47492bd18a14f259271c0

                SHA1

                2e4857ca0af00740f2b592eb06607821cef8ecf0

                SHA256

                b069c79498e11412e2b2725479aee383a1a785c8f2bc32e6bcb0fd78de51f5dc

                SHA512

                9096bb99397ed9dc7c7fb5118c85e06b80ad7c3b1c1da9b5dbf82446f1f3f37af8bf4638a7b062b16b31a32a113277f94641602c279d702f96acc8983ffef07a

              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\isshost.exe

                Filesize

                14KB

                MD5

                9f47c28441547bd4239f8442009b91f3

                SHA1

                b20ac32e992e0600f83a44e8c0b5120b3f8f5c33

                SHA256

                7adc1637d8dbae9efde8201fa2c989ef543f14227e589aa923442915bad4d088

                SHA512

                ec30025c6fa482b34f842fe77029c59b8b5b713c4e9bb5100d420c2cca67676d83aabd5ef5f1bc55f44e3ae3176ff96f54e55547c1312f5a1d76e2945c8d07df

              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\isshost.exe

                Filesize

                14KB

                MD5

                9f47c28441547bd4239f8442009b91f3

                SHA1

                b20ac32e992e0600f83a44e8c0b5120b3f8f5c33

                SHA256

                7adc1637d8dbae9efde8201fa2c989ef543f14227e589aa923442915bad4d088

                SHA512

                ec30025c6fa482b34f842fe77029c59b8b5b713c4e9bb5100d420c2cca67676d83aabd5ef5f1bc55f44e3ae3176ff96f54e55547c1312f5a1d76e2945c8d07df

              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\isshost.exe

                Filesize

                14KB

                MD5

                9f47c28441547bd4239f8442009b91f3

                SHA1

                b20ac32e992e0600f83a44e8c0b5120b3f8f5c33

                SHA256

                7adc1637d8dbae9efde8201fa2c989ef543f14227e589aa923442915bad4d088

                SHA512

                ec30025c6fa482b34f842fe77029c59b8b5b713c4e9bb5100d420c2cca67676d83aabd5ef5f1bc55f44e3ae3176ff96f54e55547c1312f5a1d76e2945c8d07df

              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\isshost.exe

                Filesize

                14KB

                MD5

                9f47c28441547bd4239f8442009b91f3

                SHA1

                b20ac32e992e0600f83a44e8c0b5120b3f8f5c33

                SHA256

                7adc1637d8dbae9efde8201fa2c989ef543f14227e589aa923442915bad4d088

                SHA512

                ec30025c6fa482b34f842fe77029c59b8b5b713c4e9bb5100d420c2cca67676d83aabd5ef5f1bc55f44e3ae3176ff96f54e55547c1312f5a1d76e2945c8d07df

              • memory/524-25-0x00000000751D0000-0x0000000075781000-memory.dmp

                Filesize

                5.7MB

              • memory/524-62-0x0000000001660000-0x0000000001670000-memory.dmp

                Filesize

                64KB

              • memory/524-63-0x0000000001660000-0x0000000001670000-memory.dmp

                Filesize

                64KB

              • memory/524-35-0x0000000001660000-0x0000000001670000-memory.dmp

                Filesize

                64KB

              • memory/524-61-0x00000000751D0000-0x0000000075781000-memory.dmp

                Filesize

                5.7MB

              • memory/524-22-0x00000000751D0000-0x0000000075781000-memory.dmp

                Filesize

                5.7MB

              • memory/524-23-0x0000000001660000-0x0000000001670000-memory.dmp

                Filesize

                64KB

              • memory/2320-29-0x0000000000400000-0x0000000000453000-memory.dmp

                Filesize

                332KB

              • memory/2320-24-0x0000000000400000-0x0000000000453000-memory.dmp

                Filesize

                332KB

              • memory/2320-27-0x0000000000400000-0x0000000000453000-memory.dmp

                Filesize

                332KB

              • memory/2320-28-0x0000000000400000-0x0000000000453000-memory.dmp

                Filesize

                332KB

              • memory/2320-18-0x0000000000400000-0x0000000000453000-memory.dmp

                Filesize

                332KB

              • memory/2940-73-0x0000000000400000-0x000000000041F000-memory.dmp

                Filesize

                124KB

              • memory/2940-71-0x0000000000400000-0x000000000041F000-memory.dmp

                Filesize

                124KB

              • memory/2940-69-0x0000000000400000-0x000000000041F000-memory.dmp

                Filesize

                124KB

              • memory/2940-74-0x0000000000400000-0x000000000041F000-memory.dmp

                Filesize

                124KB

              • memory/2940-75-0x0000000000400000-0x000000000041F000-memory.dmp

                Filesize

                124KB

              • memory/3296-64-0x00000000751D0000-0x0000000075781000-memory.dmp

                Filesize

                5.7MB

              • memory/3296-45-0x0000000000BC0000-0x0000000000BD0000-memory.dmp

                Filesize

                64KB

              • memory/3296-44-0x00000000751D0000-0x0000000075781000-memory.dmp

                Filesize

                5.7MB

              • memory/3296-47-0x00000000751D0000-0x0000000075781000-memory.dmp

                Filesize

                5.7MB

              • memory/3296-65-0x0000000000BC0000-0x0000000000BD0000-memory.dmp

                Filesize

                64KB

              • memory/3296-66-0x00000000751D0000-0x0000000075781000-memory.dmp

                Filesize

                5.7MB

              • memory/3868-52-0x0000000000400000-0x0000000000453000-memory.dmp

                Filesize

                332KB

              • memory/3868-55-0x0000000000400000-0x0000000000453000-memory.dmp

                Filesize

                332KB

              • memory/3868-56-0x0000000000400000-0x0000000000453000-memory.dmp

                Filesize

                332KB

              • memory/3868-54-0x0000000000400000-0x0000000000453000-memory.dmp

                Filesize

                332KB

              • memory/4184-76-0x0000000000400000-0x0000000000442000-memory.dmp

                Filesize

                264KB

              • memory/4184-60-0x0000000000400000-0x0000000000442000-memory.dmp

                Filesize

                264KB

              • memory/4184-7-0x0000000000400000-0x0000000000442000-memory.dmp

                Filesize

                264KB

              • memory/4184-13-0x0000000000400000-0x0000000000442000-memory.dmp

                Filesize

                264KB

              • memory/4264-77-0x0000000000400000-0x0000000000442000-memory.dmp

                Filesize

                264KB

              • memory/4264-67-0x0000000000400000-0x0000000000442000-memory.dmp

                Filesize

                264KB

              • memory/4264-49-0x0000000000400000-0x0000000000442000-memory.dmp

                Filesize

                264KB

              • memory/4940-3-0x0000000001750000-0x0000000001760000-memory.dmp

                Filesize

                64KB

              • memory/4940-0-0x00000000751D0000-0x0000000075781000-memory.dmp

                Filesize

                5.7MB

              • memory/4940-34-0x00000000751D0000-0x0000000075781000-memory.dmp

                Filesize

                5.7MB

              • memory/4940-1-0x00000000751D0000-0x0000000075781000-memory.dmp

                Filesize

                5.7MB

              • memory/4940-2-0x0000000001750000-0x0000000001760000-memory.dmp

                Filesize

                64KB

              • memory/4952-33-0x00000000751D0000-0x0000000075781000-memory.dmp

                Filesize

                5.7MB

              • memory/4952-12-0x00000000751D0000-0x0000000075781000-memory.dmp

                Filesize

                5.7MB

              • memory/4952-15-0x00000000751D0000-0x0000000075781000-memory.dmp

                Filesize

                5.7MB

              • memory/4952-14-0x0000000000A60000-0x0000000000A70000-memory.dmp

                Filesize

                64KB