Analysis

  • max time kernel
    124s
  • max time network
    9s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    17-05-2024 23:17

General

  • Target

    Timsistem_Product_Specifications - 2020.07.16.exe

  • Size

    740KB

  • MD5

    bf7fe4334d0b4363d70bd997460588a3

  • SHA1

    dcba20338c5dbde13a8189f0d154e3d650cca99c

  • SHA256

    bbf62b7d87429bb832abb5c8f37635c05be6724eaab9afd13a7780595919f3a2

  • SHA512

    be3739a91180dfc1c391045fe2f9a27be3303f6a8c042cee8af7c0bca73483768c33dd806a464a7fdee1b4203135b1fde132a3edc86bd3122ba83f4b993ac4fa

  • SSDEEP

    12288:E1bl3SKiQ9X5M1EL6GgmV5hT82Hnb6tY1CoO4SOSWGbz3hLkbLvhu:OVoQ9EWe23Q0b6tYbO4e3t

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Alexia-Station

C2

79.134.225.69:4782

Mutex

QSR_MUTEX_UR8lkLH1hfB8BFkqFf

Attributes
  • encryption_key

    gO53Ewkmsbtfm9kB1s5G

  • install_name

    svchost.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Java Update

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 13 IoCs
  • Drops startup file 2 IoCs
  • Executes dropped EXE 13 IoCs
  • Loads dropped DLL 8 IoCs
  • UPX packed file 5 IoCs

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

  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 5 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • NTFS ADS 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 49 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Timsistem_Product_Specifications - 2020.07.16.exe
    "C:\Users\Admin\AppData\Local\Temp\Timsistem_Product_Specifications - 2020.07.16.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2204
    • C:\Windows\SysWOW64\notepad.exe
      "C:\Windows\system32\notepad.exe"
      2⤵
      • Drops startup file
      • Loads dropped DLL
      • NTFS ADS
      • Suspicious use of WriteProcessMemory
      PID:1004
      • C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
        "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:2948
        • C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe"
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Drops file in System32 directory
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1736
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks" /create /tn "Java Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe" /rl HIGHEST /f
            5⤵
            • Creates scheduled task(s)
            PID:2604
          • C:\Windows\SysWOW64\SubDir\svchost.exe
            "C:\Windows\SysWOW64\SubDir\svchost.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of WriteProcessMemory
            PID:2580
            • C:\Windows\SysWOW64\notepad.exe
              "C:\Windows\system32\notepad.exe"
              6⤵
              • Drops startup file
              • Loads dropped DLL
              • NTFS ADS
              • Suspicious use of WriteProcessMemory
              PID:2524
              • C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
                "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe"
                7⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious behavior: MapViewOfSection
                • Suspicious use of WriteProcessMemory
                PID:2316
                • C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
                  "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe"
                  8⤵
                  • Executes dropped EXE
                  • Drops file in System32 directory
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1588
                • C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
                  "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe" 2 1588 259397854
                  8⤵
                  • Executes dropped EXE
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of WriteProcessMemory
                  PID:1840
                  • C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
                    "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe"
                    9⤵
                    • Executes dropped EXE
                    • Suspicious use of SetThreadContext
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious behavior: MapViewOfSection
                    • Suspicious use of WriteProcessMemory
                    PID:2736
                    • C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
                      "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe"
                      10⤵
                      • Executes dropped EXE
                      PID:2556
                    • C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
                      "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe" 2 2556 259398790
                      10⤵
                      • Executes dropped EXE
                      • Suspicious behavior: EnumeratesProcesses
                      PID:2748
        • C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe" 2 1736 259395982
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2400
          • C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
            "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of WriteProcessMemory
            PID:1228
            • C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
              "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe"
              6⤵
              • Executes dropped EXE
              • Drops file in System32 directory
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:2268
            • C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
              "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe" 2 2268 259397791
              6⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              PID:1352
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k netsvcs
    1⤵
      PID:2396
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k netsvcs
      1⤵
        PID:2364
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k netsvcs
        1⤵
          PID:1004
        • C:\Windows\system32\svchost.exe
          C:\Windows\system32\svchost.exe -k netsvcs
          1⤵
            PID:2704

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Java Update.vbs

            Filesize

            117B

            MD5

            1e1210e1f4ddf6ef0c8fba38d42fc47d

            SHA1

            277b28ec9205781e0bb7b83eebebd3a6020d4885

            SHA256

            be103c639055c00b2f4affc5924292dc638828c496d9dafb171544608dad5944

            SHA512

            40acb3964bf40743e8ed1175686389197cbde90ae707669c257683bd7d553db8bb43e300b8ac79c238929ff6c015d79c10316064ad211e00d2deb7127625810e

          • C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe

            Filesize

            740KB

            MD5

            bf7fe4334d0b4363d70bd997460588a3

            SHA1

            dcba20338c5dbde13a8189f0d154e3d650cca99c

            SHA256

            bbf62b7d87429bb832abb5c8f37635c05be6724eaab9afd13a7780595919f3a2

            SHA512

            be3739a91180dfc1c391045fe2f9a27be3303f6a8c042cee8af7c0bca73483768c33dd806a464a7fdee1b4203135b1fde132a3edc86bd3122ba83f4b993ac4fa

          • memory/1004-3-0x0000000000080000-0x0000000000081000-memory.dmp

            Filesize

            4KB

          • memory/1004-6-0x0000000000080000-0x0000000000081000-memory.dmp

            Filesize

            4KB

          • memory/1228-90-0x0000000000400000-0x00000000004C0000-memory.dmp

            Filesize

            768KB

          • memory/1352-132-0x0000000000400000-0x00000000004C0000-memory.dmp

            Filesize

            768KB

          • memory/1588-110-0x0000000000400000-0x00000000004D0000-memory.dmp

            Filesize

            832KB

          • memory/1588-97-0x0000000000550000-0x00000000005B2000-memory.dmp

            Filesize

            392KB

          • memory/1736-26-0x0000000000400000-0x00000000004D0000-memory.dmp

            Filesize

            832KB

          • memory/1736-59-0x0000000000400000-0x00000000004D0000-memory.dmp

            Filesize

            832KB

          • memory/1736-30-0x0000000000400000-0x00000000004D0000-memory.dmp

            Filesize

            832KB

          • memory/1736-29-0x00000000004D0000-0x0000000000532000-memory.dmp

            Filesize

            392KB

          • memory/1736-28-0x00000000004D0000-0x0000000000532000-memory.dmp

            Filesize

            392KB

          • memory/1736-25-0x0000000000400000-0x00000000004D0000-memory.dmp

            Filesize

            832KB

          • memory/1736-19-0x0000000000400000-0x00000000004D0000-memory.dmp

            Filesize

            832KB

          • memory/1736-27-0x0000000000400000-0x00000000004D0000-memory.dmp

            Filesize

            832KB

          • memory/1840-111-0x0000000000400000-0x00000000004C0000-memory.dmp

            Filesize

            768KB

          • memory/2204-2-0x0000000000400000-0x00000000004C0000-memory.dmp

            Filesize

            768KB

          • memory/2204-0-0x00000000001C0000-0x00000000001C1000-memory.dmp

            Filesize

            4KB

          • memory/2204-1-0x000000000045B000-0x0000000000465000-memory.dmp

            Filesize

            40KB

          • memory/2268-77-0x00000000004D0000-0x0000000000532000-memory.dmp

            Filesize

            392KB

          • memory/2268-88-0x0000000000400000-0x00000000004D0000-memory.dmp

            Filesize

            832KB

          • memory/2268-136-0x0000000000400000-0x00000000004D0000-memory.dmp

            Filesize

            832KB

          • memory/2316-94-0x0000000000400000-0x00000000004C0000-memory.dmp

            Filesize

            768KB

          • memory/2400-32-0x0000000000400000-0x00000000004C0000-memory.dmp

            Filesize

            768KB

          • memory/2400-31-0x0000000000400000-0x00000000004C0000-memory.dmp

            Filesize

            768KB

          • memory/2556-129-0x00000000007F0000-0x0000000000852000-memory.dmp

            Filesize

            392KB

          • memory/2556-135-0x0000000000400000-0x00000000004D0000-memory.dmp

            Filesize

            832KB

          • memory/2580-56-0x0000000000400000-0x00000000004C0000-memory.dmp

            Filesize

            768KB

          • memory/2736-116-0x0000000000400000-0x00000000004C0000-memory.dmp

            Filesize

            768KB

          • memory/2748-131-0x0000000000400000-0x00000000004C0000-memory.dmp

            Filesize

            768KB

          • memory/2948-22-0x0000000000400000-0x00000000004C0000-memory.dmp

            Filesize

            768KB