Analysis

  • max time kernel
    119s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    06-03-2024 20:36

General

  • Target

    SRChecker.exe

  • Size

    355KB

  • MD5

    b9bcd87d93e58cb0248f03227711ccd8

  • SHA1

    253d2d8d0bb40ebb67204e9fef51480b29bfae8e

  • SHA256

    61b94b0246950809744d7fc1c4ed2d15fdcd48062fd4659d15a657cf5d7135f3

  • SHA512

    ccdc32b16d1ef2619f040025f712f483f82320081a1d81a8699f43cc801ecd2ddf49e9903a6be46909e5737d486bdc5ecdbd2cca2aea74520892aebfc10f791b

  • SSDEEP

    6144:k9r0kZvaF4NTBbDdNBqFyCWEW5LMD7YUNo8JqnBH:YSWNT5ZbqdUM9NoFnh

Malware Config

Signatures

  • Detect Neshta payload 10 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Gathers network information 2 TTPs 2 IoCs

    Uses commandline utility to view network configuration.

  • Modifies registry class 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SRChecker.exe
    "C:\Users\Admin\AppData\Local\Temp\SRChecker.exe"
    1⤵
    • Loads dropped DLL
    • Modifies system executable filetype association
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2164
    • C:\Users\Admin\AppData\Local\Temp\3582-490\SRChecker.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\SRChecker.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:2056
      • C:\Windows\system32\cmd.exe
        "C:\Windows\sysnative\cmd" /c "C:\Users\Admin\AppData\Local\Temp\6058.tmp\6059.tmp\605A.bat C:\Users\Admin\AppData\Local\Temp\3582-490\SRChecker.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2504
        • C:\Windows\system32\ipconfig.exe
          ipconfig
          4⤵
          • Gathers network information
          PID:2512
        • C:\Windows\system32\findstr.exe
          findstr /R /C:"IPv4 Address"
          4⤵
            PID:2568
          • C:\Windows\system32\ipconfig.exe
            ipconfig
            4⤵
            • Gathers network information
            PID:2580
          • C:\Windows\system32\findstr.exe
            findstr /R /C:"IPv6 Address"
            4⤵
              PID:2604
            • C:\Windows\System32\Wbem\WMIC.exe
              wmic baseboard get serialnumber
              4⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:2564
            • C:\Windows\System32\Wbem\WMIC.exe
              wmic bios get serialnumber
              4⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:1672
            • C:\Windows\System32\Wbem\WMIC.exe
              wmic cpu get serialnumber
              4⤵
                PID:2692
              • C:\Windows\System32\Wbem\WMIC.exe
                wmic diskdrive get serialnumber
                4⤵
                  PID:2412
                • C:\Windows\System32\Wbem\WMIC.exe
                  wmic baseboard get manufacturer
                  4⤵
                    PID:2380

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\MSOCache\ALLUSE~1\{90140~1\dwtrig20.exe

              Filesize

              547KB

              MD5

              cf6c595d3e5e9667667af096762fd9c4

              SHA1

              9bb44da8d7f6457099cb56e4f7d1026963dce7ce

              SHA256

              593e60cc30ae0789448547195af77f550387f6648d45847ea244dd0dd7abf03d

              SHA512

              ff4f789df9e6a6d0fbe12b3250f951fcf11e857906c65e96a30bb46266e7e1180d6103a03db2f3764e0d1346b2de7afba8259ba080057e4a268e45e8654dfa80

            • C:\Users\Admin\AppData\Local\Temp\6058.tmp\6059.tmp\605A.bat

              Filesize

              598B

              MD5

              d07fa323a21c5748a70f0e099f9b3232

              SHA1

              b49b564709d00325eaf982544732d0a48c99f8e6

              SHA256

              e5af0e9e82eeb40ef4e1e0779c984d3554cae53eee62fc1443f4dd59e23fc83f

              SHA512

              f876c823d2b2e4c0f7fbad8089567a17ec34d38c7e9cea7c36a11e49cf7730b4fbcbde8f6f857c14ee66254eb091b7f3536b902091be268f057bfb2369f728de

            • \PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE

              Filesize

              252KB

              MD5

              9e2b9928c89a9d0da1d3e8f4bd96afa7

              SHA1

              ec66cda99f44b62470c6930e5afda061579cde35

              SHA256

              8899b4ed3446b7d55b54defbc1acb7c5392a4b3bc8ec2cdc7c31171708965043

              SHA512

              2ca5ad1d0e12a8049de885b90b7f56fe77c868e0d6dae4ec4b6f3bc0bf7b2e73295cc9b1328c2b45357ffb0d7804622ab3f91a56140b098e93b691032d508156

            • \Users\Admin\AppData\Local\Temp\3582-490\SRChecker.exe

              Filesize

              315KB

              MD5

              0efcbf56c6f5cce6b2144b5942904dcb

              SHA1

              00fac9a0a7f7696a3f8e285cb29f598720a43969

              SHA256

              eabb1d1ce87820f1f86810bf3b2649b6c7c46ebcf6d004191b0be1d9736a2d46

              SHA512

              cf43c5edb8a89fd468bbf9411f6ef53c9aa78e0cf02f7ff76992b60627277f62414767a67489c08bd10602e73bb27c7dcd163b4580ddb85e64899905c20b4a27

            • memory/2164-87-0x0000000000400000-0x000000000041B000-memory.dmp

              Filesize

              108KB

            • memory/2164-86-0x0000000000400000-0x000000000041B000-memory.dmp

              Filesize

              108KB

            • memory/2164-73-0x0000000000400000-0x000000000041B000-memory.dmp

              Filesize

              108KB

            • memory/2164-88-0x0000000000400000-0x000000000041B000-memory.dmp

              Filesize

              108KB

            • memory/2164-89-0x0000000000400000-0x000000000041B000-memory.dmp

              Filesize

              108KB

            • memory/2164-90-0x0000000000400000-0x000000000041B000-memory.dmp

              Filesize

              108KB

            • memory/2164-91-0x0000000000400000-0x000000000041B000-memory.dmp

              Filesize

              108KB

            • memory/2164-92-0x0000000000400000-0x000000000041B000-memory.dmp

              Filesize

              108KB

            • memory/2164-94-0x0000000000400000-0x000000000041B000-memory.dmp

              Filesize

              108KB