Analysis

  • max time kernel
    99s
  • max time network
    112s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    21-10-2022 20:04

General

  • Target

    8133ac485b0b77131493591ad4636a2c2414f5bcfe6d917bcd344ae1ac70c17a.exe

  • Size

    931KB

  • MD5

    ef37b75fb8488cd171bf04013a2b6f36

  • SHA1

    2bd5c303bb4c30407a3d37f8dee86f6089c0e4b3

  • SHA256

    8133ac485b0b77131493591ad4636a2c2414f5bcfe6d917bcd344ae1ac70c17a

  • SHA512

    a777ffb11c7197df1036943c4907ac9ad768e01589d274a657ab185c898e2238b5153721c10aac68a6309405c0ceab0d278e78051a2766c66636b938e2500c31

  • SSDEEP

    12288:oRWNcr8oxnU1ztrABdy5oQc82UYoi6Cuw78YOJEn1GUEVQqYHQFOH9LPsv5mrNmu:LNBIUDMs+YYowu68GGUEtsh7N18Cf

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer payload 4 IoCs
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • Nirsoft 2 IoCs
  • Executes dropped EXE 1 IoCs
  • UPX packed file 11 IoCs

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

  • Loads dropped DLL 4 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 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 49 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 54 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8133ac485b0b77131493591ad4636a2c2414f5bcfe6d917bcd344ae1ac70c17a.exe
    "C:\Users\Admin\AppData\Local\Temp\8133ac485b0b77131493591ad4636a2c2414f5bcfe6d917bcd344ae1ac70c17a.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1004
    • C:\Users\Admin\3ps7rwa4zwf456\TNRFCpAx.exe
      "C:\Users\Admin\3ps7rwa4zwf456\TNRFCpAx.exe" XarYxpEoyJ.CQK
      2⤵
      • Modifies visiblity of hidden/system files in Explorer
      • 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:752
      • 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:1508
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
          /scomma "C:\Users\Admin\AppData\Local\Temp\ADq3qD1KvS.ini"
          4⤵
            PID:608
          • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
            /scomma "C:\Users\Admin\AppData\Local\Temp\az5ok0fNR6.ini"
            4⤵
            • Accesses Microsoft Outlook accounts
            PID:1648
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Users\Admin\3PS7RW~1\run.vbs"
          3⤵
            PID:564
          • C:\Windows\SysWOW64\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\3PS7RW~1\run.vbs"
            3⤵
              PID:1368

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\3PS7RW~1\LULXYL~1.NYT

          Filesize

          260KB

          MD5

          ad30e95fa8c6bf98548540b405c70e55

          SHA1

          db9c0c44ba0fc5fe57bfa88c9dad759fc73ec02d

          SHA256

          ce7f8806461396d880cc640d4ffe809003d47b9dbe3c9f39ee9f0406aadc9b26

          SHA512

          d8d6de5baa325e87cf325ff17243cac07618329338d57be57d64076a95645c0ec9265568d53043df751c14a7107c7e144a9db1fc7db61904a56d9e8ea2f4371e

        • C:\Users\Admin\3PS7RW~1\haCRwbSN.NIF

          Filesize

          203B

          MD5

          66bded59cc9ee1febd473f8b7777cc4f

          SHA1

          1d53b1c5f29a16f110edb65f1de9b2045efcbec2

          SHA256

          cfee2deff57e7ee1d086c673cad28a38a3e8ac20c73b001b501c8ce53cc413f0

          SHA512

          3241055681a4c5b91f10ca7dd47144ddc1a7b2142110686cdc1e3cb950a3a6229266e4a444d5c00a845e6c655a234b0dcd664cd4b309b1ed70ed51929ec27119

        • C:\Users\Admin\3PS7RW~1\run.vbs

          Filesize

          95B

          MD5

          4f34f3e4169e14bf98aaa33a5d2ddfb3

          SHA1

          3a62ecbce07144ea2cfce90e5daa77f2d3158505

          SHA256

          c541b6af6dd1330539c8f97e6e4c0dbc37bc85baa1bfa5094648a370bae61b85

          SHA512

          488a0a2dc763f42ece77b3c6aa513b2933a1ceb93889d0f603fd552267869baff2692813e43e61c6277f09fc9f51d93e162f50cf9f1cc2e7fd6644c5d76b9408

        • C:\Users\Admin\3ps7rwa4zwf456\TNRFCpAx.exe

          Filesize

          915KB

          MD5

          e01ced5c12390ff5256694eda890b33a

          SHA1

          0bb74a9d3154d1269e5e456aa41e94b60f753f78

          SHA256

          66c1f3e71685f81f836e29e77844c737ceaa47ff787d6b233b05166973fa73ba

          SHA512

          93a35ef3749826c1256c4de0fffe099374dbc5cd3d8eccf22690cf2a4c7e63b508ddbe4e412758a84f9c6e9478b5173a6cf93606779af18542d5a2937183219d

        • C:\Users\Admin\3ps7rwa4zwf456\XarYxpEoyJ.CQK

          Filesize

          35.3MB

          MD5

          8f78285e5f584a9b613a368eb48edeaa

          SHA1

          d5dd45fad71be65a0321fa4fe5e12c0776daa5c7

          SHA256

          2681dfee81b7024cc64940f458e524e3d9f8235b540f8ff5d8a882986013a076

          SHA512

          77937b61e6c6f89a014e05b3754443f5e074ec38d1a4a183100334d777f549cfae4c1e0d8c08fe72aa28c2706680e50556f2463ee185eaf8ecaf4ee1d33ca60c

        • C:\Users\Admin\AppData\Local\Temp\ADq3qD1KvS.ini

          Filesize

          5B

          MD5

          d1ea279fb5559c020a1b4137dc4de237

          SHA1

          db6f8988af46b56216a6f0daf95ab8c9bdb57400

          SHA256

          fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

          SHA512

          720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

        • \Users\Admin\3ps7rwa4zwf456\TNRFCpAx.exe

          Filesize

          915KB

          MD5

          e01ced5c12390ff5256694eda890b33a

          SHA1

          0bb74a9d3154d1269e5e456aa41e94b60f753f78

          SHA256

          66c1f3e71685f81f836e29e77844c737ceaa47ff787d6b233b05166973fa73ba

          SHA512

          93a35ef3749826c1256c4de0fffe099374dbc5cd3d8eccf22690cf2a4c7e63b508ddbe4e412758a84f9c6e9478b5173a6cf93606779af18542d5a2937183219d

        • \Users\Admin\3ps7rwa4zwf456\TNRFCpAx.exe

          Filesize

          915KB

          MD5

          e01ced5c12390ff5256694eda890b33a

          SHA1

          0bb74a9d3154d1269e5e456aa41e94b60f753f78

          SHA256

          66c1f3e71685f81f836e29e77844c737ceaa47ff787d6b233b05166973fa73ba

          SHA512

          93a35ef3749826c1256c4de0fffe099374dbc5cd3d8eccf22690cf2a4c7e63b508ddbe4e412758a84f9c6e9478b5173a6cf93606779af18542d5a2937183219d

        • \Users\Admin\3ps7rwa4zwf456\TNRFCpAx.exe

          Filesize

          915KB

          MD5

          e01ced5c12390ff5256694eda890b33a

          SHA1

          0bb74a9d3154d1269e5e456aa41e94b60f753f78

          SHA256

          66c1f3e71685f81f836e29e77844c737ceaa47ff787d6b233b05166973fa73ba

          SHA512

          93a35ef3749826c1256c4de0fffe099374dbc5cd3d8eccf22690cf2a4c7e63b508ddbe4e412758a84f9c6e9478b5173a6cf93606779af18542d5a2937183219d

        • \Users\Admin\3ps7rwa4zwf456\TNRFCpAx.exe

          Filesize

          915KB

          MD5

          e01ced5c12390ff5256694eda890b33a

          SHA1

          0bb74a9d3154d1269e5e456aa41e94b60f753f78

          SHA256

          66c1f3e71685f81f836e29e77844c737ceaa47ff787d6b233b05166973fa73ba

          SHA512

          93a35ef3749826c1256c4de0fffe099374dbc5cd3d8eccf22690cf2a4c7e63b508ddbe4e412758a84f9c6e9478b5173a6cf93606779af18542d5a2937183219d

        • memory/608-80-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/608-82-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/608-74-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/608-78-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/608-83-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/608-81-0x0000000000400000-0x0000000000453000-memory.dmp

          Filesize

          332KB

        • memory/1004-54-0x0000000075211000-0x0000000075213000-memory.dmp

          Filesize

          8KB

        • memory/1508-95-0x0000000000400000-0x0000000000442000-memory.dmp

          Filesize

          264KB

        • memory/1508-85-0x0000000000400000-0x0000000000442000-memory.dmp

          Filesize

          264KB

        • memory/1508-67-0x0000000000400000-0x0000000000442000-memory.dmp

          Filesize

          264KB

        • memory/1508-65-0x0000000000400000-0x0000000000442000-memory.dmp

          Filesize

          264KB

        • memory/1648-94-0x0000000000400000-0x000000000041F000-memory.dmp

          Filesize

          124KB

        • memory/1648-93-0x0000000000400000-0x000000000041F000-memory.dmp

          Filesize

          124KB

        • memory/1648-92-0x0000000000400000-0x000000000041F000-memory.dmp

          Filesize

          124KB

        • memory/1648-90-0x0000000000400000-0x000000000041F000-memory.dmp

          Filesize

          124KB

        • memory/1648-86-0x0000000000400000-0x000000000041F000-memory.dmp

          Filesize

          124KB