Analysis

  • max time kernel
    124s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    20-10-2022 01:21

General

  • Target

    af587519aeb6d64f3559f7f93776c29523d3e613f1d6133fde09cb9e2685e620.exe

  • Size

    936KB

  • MD5

    93afcb782bfddfb4f60d114fe22fc05e

  • SHA1

    0125f4eb7cbd4eb14fedb74c3444a5ca50be8b24

  • SHA256

    af587519aeb6d64f3559f7f93776c29523d3e613f1d6133fde09cb9e2685e620

  • SHA512

    55dc4e2167a397187609bdf5cc3fddb874d3a58c70fd522b56bca396bcddda1ab73c08e413455a97ba2bf5c6ab8de2af888b76400e1a4e645984590d3686cdb7

  • SSDEEP

    12288:Cat0EAH49n8BOaQWVZXN4xxN5nltL0LkbUcpC/SDbO86Cuw78YOJEn1GUEVQqYHI:tt24byZKxldbouu68GGUEtsh7N1tEuc

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer payload 8 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • Nirsoft 2 IoCs
  • Executes dropped EXE 3 IoCs
  • UPX packed file 15 IoCs

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

  • Loads dropped DLL 6 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Checks whether UAC is enabled 1 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 60 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\af587519aeb6d64f3559f7f93776c29523d3e613f1d6133fde09cb9e2685e620.exe
    "C:\Users\Admin\AppData\Local\Temp\af587519aeb6d64f3559f7f93776c29523d3e613f1d6133fde09cb9e2685e620.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1808
    • C:\Users\Admin\2yfzc537c8ap43\igfrxe.exe
      "C:\Users\Admin\2yfzc537c8ap43\igfrxe.exe" LTTGysghrrbq.NKB
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1928
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1712
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
          /scomma "C:\Users\Admin\AppData\Local\Temp\JZQVyOqmo5.ini"
          4⤵
            PID:864
          • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
            /scomma "C:\Users\Admin\AppData\Local\Temp\OVfeWtO04f.ini"
            4⤵
              PID:956
          • C:\Windows\SysWOW64\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\2YFZC5~1\run.vbs"
            3⤵
            • Loads dropped DLL
            • Suspicious use of WriteProcessMemory
            PID:1676
            • C:\Users\Admin\2yfzc537c8ap43\igfrxe.exe
              "C:\Users\Admin\2yfzc537c8ap43\igfrxe.exe" LTTGysghrrbq.NKB
              4⤵
              • Executes dropped EXE
              • Adds Run key to start application
              • Checks whether UAC is enabled
              • Suspicious use of SetThreadContext
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:1788
              • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
                "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
                5⤵
                • Suspicious use of SetThreadContext
                • Suspicious use of SetWindowsHookEx
                • Suspicious use of WriteProcessMemory
                PID:280
                • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
                  /scomma "C:\Users\Admin\AppData\Local\Temp\QGG6jO4UVV.ini"
                  6⤵
                    PID:972
                  • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
                    /scomma "C:\Users\Admin\AppData\Local\Temp\tJTdOp5aPP.ini"
                    6⤵
                    • Accesses Microsoft Outlook accounts
                    PID:1004
                • C:\Windows\SysWOW64\WScript.exe
                  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\2YFZC5~1\run.vbs"
                  5⤵
                  • Loads dropped DLL
                  PID:2032
                  • C:\Users\Admin\2yfzc537c8ap43\igfrxe.exe
                    "C:\Users\Admin\2yfzc537c8ap43\igfrxe.exe" LTTGysghrrbq.NKB
                    6⤵
                    • Executes dropped EXE
                    PID:1700

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\2YFZC5~1\BeSWffW.HCU

          Filesize

          260KB

          MD5

          82c183a2c7792a6982e749bad783f548

          SHA1

          09e5fc45014a5d3de4b252f0ddc4772be29be81b

          SHA256

          c4f2b4402f66d7189f4a97caaf934d5e8fc72c1b47e34468a6b4659cfab53512

          SHA512

          1859d93434f040ef335e50b7b01deafda9e00521e3fd7cc91871e106d9047a4e8b548ce63c152a85a06e1620cbb5d317ff231f8071f931199df13c2e12109688

        • C:\Users\Admin\2YFZC5~1\SoOWxTjsHIsd.MPW

          Filesize

          175B

          MD5

          3162a3791d7e62e8c908e3b580e017b5

          SHA1

          2528c56ea8f417d77b93582ae36d9bd2dd6229d9

          SHA256

          98fb165b4700deb830d3ecbdb3964f25cb367e78c0345e7f29394c28d9dc826d

          SHA512

          1630e1cd61b6dea66148a04ea66c287377da169a2ea9decb868d67fbac03ee0b279cc8330f97b8c8d5b6521362218244d833b934bc31c5324776bc44d27bc615

        • C:\Users\Admin\2YFZC5~1\run.vbs

          Filesize

          95B

          MD5

          506ae4ee1f8e79cb9e8e51311d1eebe2

          SHA1

          ea3634d997a795f943f7cb45a0d937ea948f79cc

          SHA256

          9c4fcff22e3d5410f1efa4df0b7f1b5dd9818918c6af68b393b837152a25f719

          SHA512

          663a2e223e07fbc4a2977c1c5aa9db62f62f1b4066701eef8704cbfef1cd1378a84a89476c0bc3cff3eb05550f2ec1441ec2dd01fa8be457ffbe558644726b51

        • C:\Users\Admin\2yfzc537c8ap43\LTTGysghrrbq.NKB

          Filesize

          32.4MB

          MD5

          a394cb183feb0ae92a066609b4d2e0fb

          SHA1

          45777a13bd47575d6e479cd256e50a5f8ea5f900

          SHA256

          eef41d8e93652938b756456a42c196bfcc499cc585dd34c6dd4ca1116956819c

          SHA512

          b3133a40095fa4a167a82f454e9ea69e91c9ca5ed086a404c5b08a72c3d0f6c89413212249053c21e2ec21e041a9be4e07547cf46412d9ddfc48c2c6ea89fa9e

        • C:\Users\Admin\2yfzc537c8ap43\igfrxe.exe

          Filesize

          915KB

          MD5

          e01ced5c12390ff5256694eda890b33a

          SHA1

          0bb74a9d3154d1269e5e456aa41e94b60f753f78

          SHA256

          66c1f3e71685f81f836e29e77844c737ceaa47ff787d6b233b05166973fa73ba

          SHA512

          93a35ef3749826c1256c4de0fffe099374dbc5cd3d8eccf22690cf2a4c7e63b508ddbe4e412758a84f9c6e9478b5173a6cf93606779af18542d5a2937183219d

        • C:\Users\Admin\2yfzc537c8ap43\igfrxe.exe

          Filesize

          915KB

          MD5

          e01ced5c12390ff5256694eda890b33a

          SHA1

          0bb74a9d3154d1269e5e456aa41e94b60f753f78

          SHA256

          66c1f3e71685f81f836e29e77844c737ceaa47ff787d6b233b05166973fa73ba

          SHA512

          93a35ef3749826c1256c4de0fffe099374dbc5cd3d8eccf22690cf2a4c7e63b508ddbe4e412758a84f9c6e9478b5173a6cf93606779af18542d5a2937183219d

        • C:\Users\Admin\2yfzc537c8ap43\igfrxe.exe

          Filesize

          915KB

          MD5

          e01ced5c12390ff5256694eda890b33a

          SHA1

          0bb74a9d3154d1269e5e456aa41e94b60f753f78

          SHA256

          66c1f3e71685f81f836e29e77844c737ceaa47ff787d6b233b05166973fa73ba

          SHA512

          93a35ef3749826c1256c4de0fffe099374dbc5cd3d8eccf22690cf2a4c7e63b508ddbe4e412758a84f9c6e9478b5173a6cf93606779af18542d5a2937183219d

        • C:\Users\Admin\2yfzc537c8ap43\igfrxe.exe

          Filesize

          915KB

          MD5

          e01ced5c12390ff5256694eda890b33a

          SHA1

          0bb74a9d3154d1269e5e456aa41e94b60f753f78

          SHA256

          66c1f3e71685f81f836e29e77844c737ceaa47ff787d6b233b05166973fa73ba

          SHA512

          93a35ef3749826c1256c4de0fffe099374dbc5cd3d8eccf22690cf2a4c7e63b508ddbe4e412758a84f9c6e9478b5173a6cf93606779af18542d5a2937183219d

        • C:\Users\Admin\AppData\Local\Temp\JZQVyOqmo5.ini

          Filesize

          5B

          MD5

          d1ea279fb5559c020a1b4137dc4de237

          SHA1

          db6f8988af46b56216a6f0daf95ab8c9bdb57400

          SHA256

          fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

          SHA512

          720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

        • C:\Users\Admin\AppData\Local\Temp\QGG6jO4UVV.ini

          Filesize

          5B

          MD5

          d1ea279fb5559c020a1b4137dc4de237

          SHA1

          db6f8988af46b56216a6f0daf95ab8c9bdb57400

          SHA256

          fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

          SHA512

          720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

        • \Users\Admin\2yfzc537c8ap43\igfrxe.exe

          Filesize

          915KB

          MD5

          e01ced5c12390ff5256694eda890b33a

          SHA1

          0bb74a9d3154d1269e5e456aa41e94b60f753f78

          SHA256

          66c1f3e71685f81f836e29e77844c737ceaa47ff787d6b233b05166973fa73ba

          SHA512

          93a35ef3749826c1256c4de0fffe099374dbc5cd3d8eccf22690cf2a4c7e63b508ddbe4e412758a84f9c6e9478b5173a6cf93606779af18542d5a2937183219d

        • \Users\Admin\2yfzc537c8ap43\igfrxe.exe

          Filesize

          915KB

          MD5

          e01ced5c12390ff5256694eda890b33a

          SHA1

          0bb74a9d3154d1269e5e456aa41e94b60f753f78

          SHA256

          66c1f3e71685f81f836e29e77844c737ceaa47ff787d6b233b05166973fa73ba

          SHA512

          93a35ef3749826c1256c4de0fffe099374dbc5cd3d8eccf22690cf2a4c7e63b508ddbe4e412758a84f9c6e9478b5173a6cf93606779af18542d5a2937183219d

        • \Users\Admin\2yfzc537c8ap43\igfrxe.exe

          Filesize

          915KB

          MD5

          e01ced5c12390ff5256694eda890b33a

          SHA1

          0bb74a9d3154d1269e5e456aa41e94b60f753f78

          SHA256

          66c1f3e71685f81f836e29e77844c737ceaa47ff787d6b233b05166973fa73ba

          SHA512

          93a35ef3749826c1256c4de0fffe099374dbc5cd3d8eccf22690cf2a4c7e63b508ddbe4e412758a84f9c6e9478b5173a6cf93606779af18542d5a2937183219d

        • \Users\Admin\2yfzc537c8ap43\igfrxe.exe

          Filesize

          915KB

          MD5

          e01ced5c12390ff5256694eda890b33a

          SHA1

          0bb74a9d3154d1269e5e456aa41e94b60f753f78

          SHA256

          66c1f3e71685f81f836e29e77844c737ceaa47ff787d6b233b05166973fa73ba

          SHA512

          93a35ef3749826c1256c4de0fffe099374dbc5cd3d8eccf22690cf2a4c7e63b508ddbe4e412758a84f9c6e9478b5173a6cf93606779af18542d5a2937183219d

        • \Users\Admin\2yfzc537c8ap43\igfrxe.exe

          Filesize

          915KB

          MD5

          e01ced5c12390ff5256694eda890b33a

          SHA1

          0bb74a9d3154d1269e5e456aa41e94b60f753f78

          SHA256

          66c1f3e71685f81f836e29e77844c737ceaa47ff787d6b233b05166973fa73ba

          SHA512

          93a35ef3749826c1256c4de0fffe099374dbc5cd3d8eccf22690cf2a4c7e63b508ddbe4e412758a84f9c6e9478b5173a6cf93606779af18542d5a2937183219d

        • \Users\Admin\2yfzc537c8ap43\igfrxe.exe

          Filesize

          915KB

          MD5

          e01ced5c12390ff5256694eda890b33a

          SHA1

          0bb74a9d3154d1269e5e456aa41e94b60f753f78

          SHA256

          66c1f3e71685f81f836e29e77844c737ceaa47ff787d6b233b05166973fa73ba

          SHA512

          93a35ef3749826c1256c4de0fffe099374dbc5cd3d8eccf22690cf2a4c7e63b508ddbe4e412758a84f9c6e9478b5173a6cf93606779af18542d5a2937183219d

        • memory/280-127-0x0000000000400000-0x0000000000442000-memory.dmp

          Filesize

          264KB

        • memory/280-116-0x0000000000400000-0x0000000000442000-memory.dmp

          Filesize

          264KB

        • memory/864-78-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/864-80-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/864-81-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/864-84-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/864-74-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/864-83-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/972-115-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/972-114-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/972-113-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/972-111-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/1004-122-0x0000000000400000-0x000000000041F000-memory.dmp

          Filesize

          124KB

        • memory/1004-125-0x0000000000400000-0x000000000041F000-memory.dmp

          Filesize

          124KB

        • memory/1004-118-0x0000000000400000-0x000000000041F000-memory.dmp

          Filesize

          124KB

        • memory/1004-126-0x0000000000400000-0x000000000041F000-memory.dmp

          Filesize

          124KB

        • memory/1004-124-0x0000000000400000-0x000000000041F000-memory.dmp

          Filesize

          124KB

        • memory/1712-89-0x0000000000400000-0x0000000000442000-memory.dmp

          Filesize

          264KB

        • memory/1712-86-0x0000000000400000-0x0000000000442000-memory.dmp

          Filesize

          264KB

        • memory/1712-82-0x0000000000400000-0x0000000000442000-memory.dmp

          Filesize

          264KB

        • memory/1712-67-0x0000000000400000-0x0000000000442000-memory.dmp

          Filesize

          264KB

        • memory/1712-65-0x0000000000400000-0x0000000000442000-memory.dmp

          Filesize

          264KB

        • memory/1808-54-0x00000000751A1000-0x00000000751A3000-memory.dmp

          Filesize

          8KB