Analysis

  • max time kernel
    120s
  • max time network
    138s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    08-11-2021 13:22

General

  • Target

    ab711cdbe0142ca44fc643c6741f396e5d027458253a985a2eb8cd9258f94b59.bin.exe

  • Size

    3.3MB

  • MD5

    bf815840ff00a0c3ba04d47cc2d158ee

  • SHA1

    c4852fecddf4aa661b46d61866b2b1e8893b5048

  • SHA256

    ab711cdbe0142ca44fc643c6741f396e5d027458253a985a2eb8cd9258f94b59

  • SHA512

    c8d97bd92e7d873e45b4ea77032d7f6caebb644a361b2bfdc876b66f2925218082107143d0052b2259404fbfd884c3a8665a61f5640c7e6dd825899038281267

Malware Config

Signatures

  • ParallaxRat

    ParallaxRat is a multipurpose RAT written in MASM.

  • ParallaxRat payload 1 IoCs

    Detects payload of Parallax Rat, a small portable Rat usually digitally signed with a Sectigo certificate.

  • Blocklisted process makes network request 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Windows directory 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ab711cdbe0142ca44fc643c6741f396e5d027458253a985a2eb8cd9258f94b59.bin.exe
    "C:\Users\Admin\AppData\Local\Temp\ab711cdbe0142ca44fc643c6741f396e5d027458253a985a2eb8cd9258f94b59.bin.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3732
    • C:\Users\Admin\AppData\Local\Temp\is-B6IDM.tmp\ab711cdbe0142ca44fc643c6741f396e5d027458253a985a2eb8cd9258f94b59.bin.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-B6IDM.tmp\ab711cdbe0142ca44fc643c6741f396e5d027458253a985a2eb8cd9258f94b59.bin.tmp" /SL5="$50080,2608320,831488,C:\Users\Admin\AppData\Local\Temp\ab711cdbe0142ca44fc643c6741f396e5d027458253a985a2eb8cd9258f94b59.bin.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:4032
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C mountvol P: /D
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4092
        • C:\Windows\SysWOW64\mountvol.exe
          mountvol P: /D
          4⤵
          • Enumerates connected drives
          PID:4456
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C bcdedit /set {bootmgr} path \EFI\Boot\bareflank.efi
        3⤵
          PID:3968
        • C:\Windows\SysWOW64\cmd.exe
          "cmd.exe" /C setx /m PATH "%PATH%C:\Users\Admin\AppData\Local\Temp\is-BJVL5.tmp"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4356
          • C:\Windows\SysWOW64\setx.exe
            setx /m PATH "C:\ProgramData\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Users\Admin\AppData\Local\Microsoft\WindowsApps;C:\Users\Admin\AppData\Local\Temp\is-BJVL5.tmp"
            4⤵
              PID:4512
          • C:\Windows\SysWOW64\cmd.exe
            "cmd.exe" /C ""C:\Users\Admin\AppData\Local\Temp\is-BJVL5.tmp\devcon.exe" remove "ROOT\bareflank""
            3⤵
              PID:4488
            • C:\Windows\SysWOW64\cmd.exe
              "cmd.exe" /C ""C:\Users\Admin\AppData\Local\Temp\is-BJVL5.tmp\devcon.exe" remove "ROOT\bfbuilder""
              3⤵
                PID:4396
              • C:\Windows\SysWOW64\cmd.exe
                "cmd.exe" /C ""C:\Users\Admin\AppData\Local\Temp\is-BJVL5.tmp\devcon.exe" install "C:\Users\Admin\AppData\Local\Temp\is-BJVL5.tmp\bfbuilder.inf" "ROOT\bfbuilder""
                3⤵
                  PID:3272
                • C:\Windows\SysWOW64\cmd.exe
                  "cmd.exe" /C ""C:\Users\Admin\AppData\Local\Temp\is-BJVL5.tmp\devcon.exe" install "C:\Users\Admin\AppData\Local\Temp\is-BJVL5.tmp\bareflank.inf" "ROOT\bareflank""
                  3⤵
                    PID:4516
                  • C:\Users\Admin\AppData\Roaming\wsqmcons.exe
                    "C:\Users\Admin\AppData\Roaming\wsqmcons.exe"
                    3⤵
                    • Executes dropped EXE
                    • Loads dropped DLL
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of WriteProcessMemory
                    PID:3696
                    • C:\Windows\SysWOW64\cmd.exe
                      "C:\Windows\system32\cmd.exe"
                      4⤵
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious behavior: MapViewOfSection
                      PID:528
                      • C:\Windows\SysWOW64\cmd.exe
                        "C:\Windows\system32\cmd.exe"
                        5⤵
                        • Blocklisted process makes network request
                        • Drops file in Windows directory
                        PID:2008

              Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

              • memory/528-163-0x0000000002A10000-0x0000000002A18000-memory.dmp

                Filesize

                32KB

              • memory/528-150-0x0000000002740000-0x0000000002742000-memory.dmp

                Filesize

                8KB

              • memory/528-142-0x0000000077999000-0x000000007799A000-memory.dmp

                Filesize

                4KB

              • memory/528-164-0x00007FFABC080000-0x00007FFABC25B000-memory.dmp

                Filesize

                1.9MB

              • memory/2008-172-0x0000000002960000-0x0000000002961000-memory.dmp

                Filesize

                4KB

              • memory/2008-171-0x0000000002960000-0x0000000002961000-memory.dmp

                Filesize

                4KB

              • memory/2008-176-0x00007FFABC080000-0x00007FFABC25B000-memory.dmp

                Filesize

                1.9MB

              • memory/2008-179-0x0000000002E50000-0x0000000002E59000-memory.dmp

                Filesize

                36KB

              • memory/2008-202-0x0000000000400000-0x0000000000424000-memory.dmp

                Filesize

                144KB

              • memory/3696-139-0x000000000112E000-0x0000000001138000-memory.dmp

                Filesize

                40KB

              • memory/3732-120-0x0000000000400000-0x00000000004D8000-memory.dmp

                Filesize

                864KB

              • memory/4032-123-0x0000000000730000-0x0000000000731000-memory.dmp

                Filesize

                4KB