Analysis

  • max time kernel
    150s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-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
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 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 12 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).

  • 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⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1140
    • 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:2808
      • 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:1112
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
          /scomma "C:\Users\Admin\AppData\Local\Temp\g3G38SxTYQ.ini"
          3⤵
            PID:2556
          • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
            /scomma "C:\Users\Admin\AppData\Local\Temp\yXJRreuF6J.ini"
            3⤵
            • Accesses Microsoft Outlook accounts
            PID:2792
        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\isshost.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Windows\isshost.exe
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2684
          • 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:2980
            • 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:2528
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dslsvc.exe
              "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dslsvc.exe"
              3⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Suspicious use of SetThreadContext
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:2512
              • 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:592
                • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
                  /scomma "C:\Users\Admin\AppData\Local\Temp\ENPL55fZZK.ini"
                  5⤵
                    PID:240
                  • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
                    /scomma "C:\Users\Admin\AppData\Local\Temp\BQ5u8s7sM4.ini"
                    5⤵
                      PID:2332
                  • 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:2468

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Temp\ENPL55fZZK.ini

              Filesize

              5B

              MD5

              d1ea279fb5559c020a1b4137dc4de237

              SHA1

              db6f8988af46b56216a6f0daf95ab8c9bdb57400

              SHA256

              fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

              SHA512

              720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

            • C:\Users\Admin\AppData\Local\Temp\g3G38SxTYQ.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

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

              Filesize

              14KB

              MD5

              9f47c28441547bd4239f8442009b91f3

              SHA1

              b20ac32e992e0600f83a44e8c0b5120b3f8f5c33

              SHA256

              7adc1637d8dbae9efde8201fa2c989ef543f14227e589aa923442915bad4d088

              SHA512

              ec30025c6fa482b34f842fe77029c59b8b5b713c4e9bb5100d420c2cca67676d83aabd5ef5f1bc55f44e3ae3176ff96f54e55547c1312f5a1d76e2945c8d07df

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

              Filesize

              487KB

              MD5

              b1b7840a85f47492bd18a14f259271c0

              SHA1

              2e4857ca0af00740f2b592eb06607821cef8ecf0

              SHA256

              b069c79498e11412e2b2725479aee383a1a785c8f2bc32e6bcb0fd78de51f5dc

              SHA512

              9096bb99397ed9dc7c7fb5118c85e06b80ad7c3b1c1da9b5dbf82446f1f3f37af8bf4638a7b062b16b31a32a113277f94641602c279d702f96acc8983ffef07a

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

              Filesize

              14KB

              MD5

              9f47c28441547bd4239f8442009b91f3

              SHA1

              b20ac32e992e0600f83a44e8c0b5120b3f8f5c33

              SHA256

              7adc1637d8dbae9efde8201fa2c989ef543f14227e589aa923442915bad4d088

              SHA512

              ec30025c6fa482b34f842fe77029c59b8b5b713c4e9bb5100d420c2cca67676d83aabd5ef5f1bc55f44e3ae3176ff96f54e55547c1312f5a1d76e2945c8d07df

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

              Filesize

              14KB

              MD5

              9f47c28441547bd4239f8442009b91f3

              SHA1

              b20ac32e992e0600f83a44e8c0b5120b3f8f5c33

              SHA256

              7adc1637d8dbae9efde8201fa2c989ef543f14227e589aa923442915bad4d088

              SHA512

              ec30025c6fa482b34f842fe77029c59b8b5b713c4e9bb5100d420c2cca67676d83aabd5ef5f1bc55f44e3ae3176ff96f54e55547c1312f5a1d76e2945c8d07df

            • memory/240-65-0x0000000000400000-0x0000000000453000-memory.dmp

              Filesize

              332KB

            • memory/240-67-0x0000000000400000-0x0000000000453000-memory.dmp

              Filesize

              332KB

            • memory/592-43-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/592-86-0x0000000000400000-0x0000000000442000-memory.dmp

              Filesize

              264KB

            • memory/592-88-0x0000000000400000-0x0000000000442000-memory.dmp

              Filesize

              264KB

            • memory/592-60-0x0000000000400000-0x0000000000442000-memory.dmp

              Filesize

              264KB

            • memory/1112-11-0x0000000000400000-0x0000000000442000-memory.dmp

              Filesize

              264KB

            • memory/1112-80-0x0000000000400000-0x0000000000442000-memory.dmp

              Filesize

              264KB

            • memory/1112-8-0x0000000000400000-0x0000000000442000-memory.dmp

              Filesize

              264KB

            • memory/1112-7-0x0000000000400000-0x0000000000442000-memory.dmp

              Filesize

              264KB

            • memory/1112-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/1112-6-0x0000000000400000-0x0000000000442000-memory.dmp

              Filesize

              264KB

            • memory/1140-0-0x0000000074790000-0x0000000074D3B000-memory.dmp

              Filesize

              5.7MB

            • memory/1140-33-0x0000000074790000-0x0000000074D3B000-memory.dmp

              Filesize

              5.7MB

            • memory/1140-2-0x0000000000380000-0x00000000003C0000-memory.dmp

              Filesize

              256KB

            • memory/1140-1-0x0000000074790000-0x0000000074D3B000-memory.dmp

              Filesize

              5.7MB

            • memory/2468-83-0x0000000074790000-0x0000000074D3B000-memory.dmp

              Filesize

              5.7MB

            • memory/2468-84-0x00000000001C0000-0x0000000000200000-memory.dmp

              Filesize

              256KB

            • memory/2468-85-0x0000000074790000-0x0000000074D3B000-memory.dmp

              Filesize

              5.7MB

            • memory/2468-56-0x00000000001C0000-0x0000000000200000-memory.dmp

              Filesize

              256KB

            • memory/2468-54-0x0000000074790000-0x0000000074D3B000-memory.dmp

              Filesize

              5.7MB

            • memory/2468-58-0x0000000074790000-0x0000000074D3B000-memory.dmp

              Filesize

              5.7MB

            • memory/2512-27-0x0000000074790000-0x0000000074D3B000-memory.dmp

              Filesize

              5.7MB

            • memory/2512-31-0x0000000074790000-0x0000000074D3B000-memory.dmp

              Filesize

              5.7MB

            • memory/2512-82-0x0000000000860000-0x00000000008A0000-memory.dmp

              Filesize

              256KB

            • memory/2512-81-0x0000000074790000-0x0000000074D3B000-memory.dmp

              Filesize

              5.7MB

            • memory/2512-28-0x0000000000860000-0x00000000008A0000-memory.dmp

              Filesize

              256KB

            • memory/2556-29-0x0000000000400000-0x0000000000453000-memory.dmp

              Filesize

              332KB

            • memory/2556-34-0x0000000000400000-0x0000000000453000-memory.dmp

              Filesize

              332KB

            • memory/2556-36-0x0000000000400000-0x0000000000453000-memory.dmp

              Filesize

              332KB

            • memory/2556-38-0x0000000000400000-0x0000000000453000-memory.dmp

              Filesize

              332KB

            • memory/2556-69-0x0000000000400000-0x0000000000453000-memory.dmp

              Filesize

              332KB

            • memory/2684-32-0x0000000074790000-0x0000000074D3B000-memory.dmp

              Filesize

              5.7MB

            • memory/2684-18-0x0000000074790000-0x0000000074D3B000-memory.dmp

              Filesize

              5.7MB

            • memory/2684-20-0x0000000074790000-0x0000000074D3B000-memory.dmp

              Filesize

              5.7MB

            • memory/2684-19-0x0000000002230000-0x0000000002270000-memory.dmp

              Filesize

              256KB

            • memory/2792-71-0x0000000000400000-0x000000000041F000-memory.dmp

              Filesize

              124KB

            • memory/2792-78-0x0000000000400000-0x000000000041F000-memory.dmp

              Filesize

              124KB

            • memory/2792-77-0x0000000000400000-0x000000000041F000-memory.dmp

              Filesize

              124KB

            • memory/2792-75-0x0000000000400000-0x000000000041F000-memory.dmp

              Filesize

              124KB

            • memory/2792-73-0x0000000000400000-0x000000000041F000-memory.dmp

              Filesize

              124KB