Analysis

  • max time kernel
    120s
  • max time network
    113s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-01-2025 20:55

General

  • Target

    088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe

  • Size

    389KB

  • MD5

    a62215571b14a4b8fe05d534088c36a6

  • SHA1

    b412a34ec2d953f5a0ea2f795e31f5b0dea15577

  • SHA256

    088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8

  • SHA512

    2061dfc62657c93133392873418944f8a94a0d2f51eae17e52fd034e938543e4ae858a4fcfa8e038a95f2a6cbeef30b4ed725fe60343bd4e2eb5369d4e130b0d

  • SSDEEP

    6144:JtEVpyJD+zjjSKDCmSam8xOPC4sOwMrSWtDYR3x0/9Yz1is:JtEVpyJyzjjJ4aBmCQr50uFK

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer payload 4 IoCs
  • Isrstealer family
  • Detected Nirsoft tools 3 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 3 IoCs

    Password recovery tool for various email clients

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 18 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Accesses Microsoft Outlook accounts 1 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 25 IoCs
  • UPX packed file 14 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 6 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 21 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 8 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe
    "C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3120
    • C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe
      "C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2912
      • C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe
        /scomma "C:\Users\Admin\AppData\Local\Temp\3W2EAj2Tqe.ini"
        3⤵
          PID:3780
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 3780 -s 80
            4⤵
            • Program crash
            PID:3232
        • C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe
          /scomma "C:\Users\Admin\AppData\Local\Temp\mTU0uMDsPk.ini"
          3⤵
          • Accesses Microsoft Outlook accounts
          • System Location Discovery: System Language Discovery
          PID:312
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\imapsv.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\imapsv.exe"
        2⤵
        • Checks computer location settings
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:5024
        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
          "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe"
          3⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:800
          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
            "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            PID:1484
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
              /scomma "C:\Users\Admin\AppData\Local\Temp\uLQQQJDL8B.ini"
              5⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              PID:3228
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
              /scomma "C:\Users\Admin\AppData\Local\Temp\7L8EkFM6mV.ini"
              5⤵
              • Executes dropped EXE
              PID:1884
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1884 -s 80
                6⤵
                • Program crash
                PID:3976
          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\imapsv.exe
            "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\imapsv.exe"
            4⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:2968
          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
            "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            PID:5108
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
              /scomma "C:\Users\Admin\AppData\Local\Temp\kVsFQ1zA44.ini"
              5⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              PID:3096
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
              /scomma "C:\Users\Admin\AppData\Local\Temp\2U1kjgoPs9.ini"
              5⤵
              • Executes dropped EXE
              PID:2468
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 2468 -s 80
                6⤵
                • Program crash
                PID:3240
          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
            "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            PID:4256
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
              /scomma "C:\Users\Admin\AppData\Local\Temp\YOOFodpgQF.ini"
              5⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              PID:3344
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
              /scomma "C:\Users\Admin\AppData\Local\Temp\qMWl7IevFK.ini"
              5⤵
              • Executes dropped EXE
              • Accesses Microsoft Outlook accounts
              • System Location Discovery: System Language Discovery
              PID:2692
          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
            "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe"
            4⤵
            • Executes dropped EXE
            PID:1904
          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
            "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            PID:2472
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
              /scomma "C:\Users\Admin\AppData\Local\Temp\t3Je4YzQdI.ini"
              5⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              PID:4344
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
              /scomma "C:\Users\Admin\AppData\Local\Temp\DrIou28KW4.ini"
              5⤵
              • Executes dropped EXE
              • Accesses Microsoft Outlook accounts
              • System Location Discovery: System Language Discovery
              PID:2136
          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
            "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            PID:4352
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smtpss.exe
              /scomma "C:\Users\Admin\AppData\Local\Temp\DlAHbcjOBL.ini"
              5⤵
              • Executes dropped EXE
              PID:1608
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1608 -s 80
                6⤵
                • Program crash
                PID:4908
      • C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe
        "C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4036
        • C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe
          /scomma "C:\Users\Admin\AppData\Local\Temp\IDcPnGA1MX.ini"
          3⤵
          • System Location Discovery: System Language Discovery
          PID:2136
        • C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe
          /scomma "C:\Users\Admin\AppData\Local\Temp\Am5jDv2vkC.ini"
          3⤵
          • Accesses Microsoft Outlook accounts
          • System Location Discovery: System Language Discovery
          PID:5000
      • C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe
        "C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe"
        2⤵
          PID:1588
        • C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe
          "C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe"
          2⤵
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:4064
          • C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe
            /scomma "C:\Users\Admin\AppData\Local\Temp\hWC87oz5iz.ini"
            3⤵
              PID:4232
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 4232 -s 80
                4⤵
                • Program crash
                PID:1608
            • C:\Users\Admin\AppData\Local\Temp\088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8.exe
              /scomma "C:\Users\Admin\AppData\Local\Temp\hjdtPPVoI6.ini"
              3⤵
              • Suspicious use of UnmapMainImage
              PID:1300
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1300 -s 12
                4⤵
                • Program crash
                PID:1352
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3780 -ip 3780
          1⤵
            PID:4428
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4232 -ip 4232
            1⤵
              PID:4356
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1300 -ip 1300
              1⤵
                PID:1628
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1884 -ip 1884
                1⤵
                  PID:2216
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 2468 -ip 2468
                  1⤵
                    PID:3544
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1608 -ip 1608
                    1⤵
                      PID:1236

                    Network

                    MITRE ATT&CK Enterprise v15

                    Replay Monitor

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                    Downloads

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

                      Filesize

                      128B

                      MD5

                      a5dcc7c9c08af7dddd82be5b036a4416

                      SHA1

                      4f998ca1526d199e355ffb435bae111a2779b994

                      SHA256

                      e24033ceec97fd03402b03acaaabd1d1e378e83bb1683afbccac760e00f8ead5

                      SHA512

                      56035de734836c0c39f0b48641c51c26adb6e79c6c65e23ca96603f71c95b8673e2ef853146e87efc899dd1878d0bbc2c82d91fbf0fce81c552048e986f9bb5a

                    • C:\Users\Admin\AppData\Local\Temp\IDcPnGA1MX.ini

                      Filesize

                      5B

                      MD5

                      d1ea279fb5559c020a1b4137dc4de237

                      SHA1

                      db6f8988af46b56216a6f0daf95ab8c9bdb57400

                      SHA256

                      fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

                      SHA512

                      720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

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

                      Filesize

                      11KB

                      MD5

                      fc2e803e85d0c50ab6227dd79340f205

                      SHA1

                      122bf356ce10cb75d0a6b86ae921b9abc746487c

                      SHA256

                      6c8da53dd540f6ba029cf855d7f4e150e8fce2f43fe95e919e2205a299a1736b

                      SHA512

                      8e085f425478af443baa3d56770028ac6cd70c64e09123902f134771d5dea6bf7cb989ae83734eaa9aa43ac991e8b487376a2bcee5ed3dd3d429de10c4a19ea9

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

                      Filesize

                      389KB

                      MD5

                      a62215571b14a4b8fe05d534088c36a6

                      SHA1

                      b412a34ec2d953f5a0ea2f795e31f5b0dea15577

                      SHA256

                      088b9daa3a7cdfa8d63b495246f8f9ae9b2912e85aef8c9077f3ed5afe13b0c8

                      SHA512

                      2061dfc62657c93133392873418944f8a94a0d2f51eae17e52fd034e938543e4ae858a4fcfa8e038a95f2a6cbeef30b4ed725fe60343bd4e2eb5369d4e130b0d

                    • memory/312-34-0x0000000000400000-0x000000000041F000-memory.dmp

                      Filesize

                      124KB

                    • memory/312-33-0x0000000000400000-0x000000000041F000-memory.dmp

                      Filesize

                      124KB

                    • memory/312-32-0x0000000000400000-0x000000000041F000-memory.dmp

                      Filesize

                      124KB

                    • memory/800-39-0x0000000074840000-0x0000000074DF1000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/800-28-0x0000000074840000-0x0000000074DF1000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/800-30-0x0000000074840000-0x0000000074DF1000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/800-29-0x0000000074840000-0x0000000074DF1000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/2136-45-0x0000000000400000-0x0000000000453000-memory.dmp

                      Filesize

                      332KB

                    • memory/2136-47-0x0000000000400000-0x0000000000453000-memory.dmp

                      Filesize

                      332KB

                    • memory/2136-46-0x0000000000400000-0x0000000000453000-memory.dmp

                      Filesize

                      332KB

                    • memory/2692-116-0x0000000000400000-0x000000000041F000-memory.dmp

                      Filesize

                      124KB

                    • memory/2692-117-0x0000000000400000-0x000000000041F000-memory.dmp

                      Filesize

                      124KB

                    • memory/2912-40-0x0000000000400000-0x0000000000442000-memory.dmp

                      Filesize

                      264KB

                    • memory/2912-8-0x0000000000400000-0x0000000000442000-memory.dmp

                      Filesize

                      264KB

                    • memory/2912-10-0x0000000000400000-0x0000000000442000-memory.dmp

                      Filesize

                      264KB

                    • memory/2912-35-0x0000000000400000-0x0000000000442000-memory.dmp

                      Filesize

                      264KB

                    • memory/3096-98-0x0000000000400000-0x0000000000453000-memory.dmp

                      Filesize

                      332KB

                    • memory/3096-97-0x0000000000400000-0x0000000000453000-memory.dmp

                      Filesize

                      332KB

                    • memory/3120-5-0x0000000074840000-0x0000000074DF1000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/3120-60-0x0000000074840000-0x0000000074DF1000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/3120-2-0x0000000074840000-0x0000000074DF1000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/3120-3-0x0000000074842000-0x0000000074843000-memory.dmp

                      Filesize

                      4KB

                    • memory/3120-4-0x0000000074840000-0x0000000074DF1000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/3120-31-0x0000000074840000-0x0000000074DF1000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/3120-1-0x0000000074840000-0x0000000074DF1000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/3120-0-0x0000000074842000-0x0000000074843000-memory.dmp

                      Filesize

                      4KB

                    • memory/3228-72-0x0000000000400000-0x0000000000453000-memory.dmp

                      Filesize

                      332KB

                    • memory/3228-71-0x0000000000400000-0x0000000000453000-memory.dmp

                      Filesize

                      332KB

                    • memory/5000-51-0x0000000000400000-0x000000000041F000-memory.dmp

                      Filesize

                      124KB

                    • memory/5000-52-0x0000000000400000-0x000000000041F000-memory.dmp

                      Filesize

                      124KB

                    • memory/5024-62-0x0000000074840000-0x0000000074DF1000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/5024-38-0x0000000074840000-0x0000000074DF1000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/5024-37-0x0000000074842000-0x0000000074843000-memory.dmp

                      Filesize

                      4KB

                    • memory/5024-36-0x0000000074840000-0x0000000074DF1000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/5024-25-0x0000000074840000-0x0000000074DF1000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/5024-24-0x0000000074840000-0x0000000074DF1000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/5024-23-0x0000000074842000-0x0000000074843000-memory.dmp

                      Filesize

                      4KB