Resubmissions

21-01-2025 15:41

250121-s4qhga1pak 10

21-01-2025 15:31

250121-sygy5szrcy 10

Analysis

  • max time kernel
    62s
  • max time network
    63s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    21-01-2025 15:41

General

  • Target

    emmasBackdoor.exe

  • Size

    2.9MB

  • MD5

    0266f80fe6efd3e3e4bd0363d17bcbde

  • SHA1

    b144914eb53d2e35e410be64d2db052d06d680df

  • SHA256

    6cffbcd23aeb7ea8c813cda4dad413b9c24d983c0fa6da03931b690b04502411

  • SHA512

    21174624b988b26d16ba96c57b65a0dd0c0fa02d5396ca29c5cc11851f7546a528e1343f3216b224f3deebb1e749ac1dfd02fc5485bf4a0dd5b6d0983c496ac8

  • SSDEEP

    49152:EwREDDMVBq77B4L8lXQn/zJNGJ7YTpZIn+lD2GgWinoaDFO/82:EwRE8q77B44+zJNN1aHNo2O/82

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

EmmasSub

C2

rath3r.xyz:4782

Mutex

7126373e-e872-4f94-bbbb-42e88d57137b

Attributes
  • encryption_key

    4DC093FC202D016F95DCEE92AAF2874F56ACC3F2

  • install_name

    Windows.WARP.JITService.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    MicrosoftUpdateTaskMachineCore

  • subdirectory

    ice

Signatures

  • Modifies Windows Defender DisableAntiSpyware settings 3 TTPs 1 IoCs
  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 2 IoCs
  • Executes dropped EXE 4 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in System32 directory 5 IoCs
  • Drops file in Program Files directory 5 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies registry class 19 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of FindShellTrayWindow 50 IoCs
  • Suspicious use of SendNotifyMessage 49 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\emmasBackdoor.exe
    "C:\Users\Admin\AppData\Local\Temp\emmasBackdoor.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1956
    • C:\Users\Admin\AppData\Local\Temp\is-2MGJ8.tmp\emmasBackdoor.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-2MGJ8.tmp\emmasBackdoor.tmp" /SL5="$50102,1909968,965632,C:\Users\Admin\AppData\Local\Temp\emmasBackdoor.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:3928
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" -ExecutionPolicy Bypass -File "C:\Users\Admin\AppData\Local\Temp\is-83R7C.tmp\disable_defender.ps1"
        3⤵
        • Modifies Windows Defender DisableAntiSpyware settings
        • Command and Scripting Interpreter: PowerShell
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1324
      • C:\Program Files (x86)\EmmasBackdoor\Client.exe
        "C:\Program Files (x86)\EmmasBackdoor\Client.exe"
        3⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:536
        • C:\Windows\SYSTEM32\schtasks.exe
          "schtasks" /create /tn "MicrosoftUpdateTaskMachineCore" /sc ONLOGON /tr "C:\Windows\system32\ice\Windows.WARP.JITService.exe" /rl HIGHEST /f
          4⤵
          • Scheduled Task/Job: Scheduled Task
          PID:2380
        • C:\Windows\system32\ice\Windows.WARP.JITService.exe
          "C:\Windows\system32\ice\Windows.WARP.JITService.exe"
          4⤵
          • Executes dropped EXE
          • Drops file in System32 directory
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:572
          • C:\Windows\SYSTEM32\schtasks.exe
            "schtasks" /create /tn "MicrosoftUpdateTaskMachineCore" /sc ONLOGON /tr "C:\Windows\system32\ice\Windows.WARP.JITService.exe" /rl HIGHEST /f
            5⤵
            • Scheduled Task/Job: Scheduled Task
            PID:3220
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc
    1⤵
      PID:3644
    • C:\Windows\system32\taskmgr.exe
      "C:\Windows\system32\taskmgr.exe" /0
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:3696
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:3372
      • C:\Program Files (x86)\EmmasBackdoor\Client.exe
        "C:\Program Files (x86)\EmmasBackdoor\Client.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:3536

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Program Files (x86)\EmmasBackdoor\Client.exe

        Filesize

        3.1MB

        MD5

        66ebe604ddf4d6ab60a183f515536528

        SHA1

        278782873ae0a5cac94add051edfc12e223be55c

        SHA256

        37e733731381c02941e4a8da30350cf968532d08012b6bb91e525241e8ee2c86

        SHA512

        756de51b5f6116640736f7dd37faf6172db79c8eaf8da17ba1e3d788d5c0179a01746f7d30044ca5c535c1b3d938bfde3e5d810b7fe50815030be8a5288c2bf9

      • C:\ProgramData\Microsoft\Windows\Start Menu\Programs\EmmasBackdoor.lnk

        Filesize

        1KB

        MD5

        3188d6b66851379af27201e187e55ca4

        SHA1

        f06e592dd26b71818fd3410f086acc0b5c748729

        SHA256

        09da50da70ac60e012eb4db1ee578f49e3e9412307c302ec6fb762eeed388725

        SHA512

        138ca9c1e10fb9fbb8521013975f3bc2e86ce1a3d882c9f5aa30660a3f4ceaef96a4657257b9e56279f3a358126a6eea3fa831d9f84548ebadd2cb4eb30b2a2d

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Client.exe.log

        Filesize

        1KB

        MD5

        b4e91d2e5f40d5e2586a86cf3bb4df24

        SHA1

        31920b3a41aa4400d4a0230a7622848789b38672

        SHA256

        5d8af3c7519874ed42a0d74ee559ae30d9cc6930aef213079347e2b47092c210

        SHA512

        968751b79a98961f145de48d425ea820fd1875bae79a725adf35fc8f4706c103ee0c7babd4838166d8a0dda9fbce3728c0265a04c4b37f335ec4eaa110a2b319

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_yrm2yydj.cse.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Users\Admin\AppData\Local\Temp\is-2MGJ8.tmp\emmasBackdoor.tmp

        Filesize

        3.3MB

        MD5

        95c49a50069cf27284ac7b186df5aae0

        SHA1

        4120193848e7726aac277f9ea6e4b3670342ed03

        SHA256

        9f62b6f4c234ded050162b55a9c6de0c604578dee34462b96615e48169a485bb

        SHA512

        f6d3fd7454943aac838cd81e17c35787747185e0736823424453ffbf375da1e921dba0a5ce88a05f7a71e2ac367d47ee8fbabbd529f48997b99f1a3afa5370cd

      • C:\Users\Admin\AppData\Local\Temp\is-83R7C.tmp\disable_defender.ps1

        Filesize

        544B

        MD5

        3568227fbb730d48fa31d13e87f9a370

        SHA1

        83ac8fbb2b9c35337f372977fe3323f63060c5ff

        SHA256

        a06e1c77a4ab2a13f90dc2f86bbb4cb662f2bd10b1f805b1b7745af4c2ad3698

        SHA512

        2b8863dbdc4c980eac867e600ca008261d046a99bf40cfc02a350ec45a04e3a7b958b21219ad0a26b339336f779ba167aa84c45dbe4d9d9ada004c4515ba6d17

      • memory/536-73-0x0000000000B60000-0x0000000000E84000-memory.dmp

        Filesize

        3.1MB

      • memory/572-98-0x000000001CE80000-0x000000001D3A8000-memory.dmp

        Filesize

        5.2MB

      • memory/572-84-0x000000001C540000-0x000000001C5F2000-memory.dmp

        Filesize

        712KB

      • memory/572-83-0x000000001BB10000-0x000000001BB60000-memory.dmp

        Filesize

        320KB

      • memory/1324-48-0x00000000077F0000-0x0000000007801000-memory.dmp

        Filesize

        68KB

      • memory/1324-53-0x0000000007970000-0x0000000007992000-memory.dmp

        Filesize

        136KB

      • memory/1324-16-0x0000000005C20000-0x0000000005C86000-memory.dmp

        Filesize

        408KB

      • memory/1324-25-0x0000000005D70000-0x00000000060C7000-memory.dmp

        Filesize

        3.3MB

      • memory/1324-26-0x0000000006280000-0x000000000629E000-memory.dmp

        Filesize

        120KB

      • memory/1324-27-0x00000000062C0000-0x000000000630C000-memory.dmp

        Filesize

        304KB

      • memory/1324-14-0x00000000053E0000-0x0000000005402000-memory.dmp

        Filesize

        136KB

      • memory/1324-30-0x00000000701F0000-0x000000007023C000-memory.dmp

        Filesize

        304KB

      • memory/1324-29-0x0000000007280000-0x00000000072B4000-memory.dmp

        Filesize

        208KB

      • memory/1324-39-0x0000000006880000-0x000000000689E000-memory.dmp

        Filesize

        120KB

      • memory/1324-40-0x0000000073FE0000-0x0000000074791000-memory.dmp

        Filesize

        7.7MB

      • memory/1324-41-0x00000000072C0000-0x0000000007364000-memory.dmp

        Filesize

        656KB

      • memory/1324-42-0x0000000073FE0000-0x0000000074791000-memory.dmp

        Filesize

        7.7MB

      • memory/1324-44-0x0000000007C80000-0x00000000082FA000-memory.dmp

        Filesize

        6.5MB

      • memory/1324-45-0x0000000007600000-0x000000000761A000-memory.dmp

        Filesize

        104KB

      • memory/1324-43-0x0000000073FE0000-0x0000000074791000-memory.dmp

        Filesize

        7.7MB

      • memory/1324-46-0x0000000007650000-0x000000000765A000-memory.dmp

        Filesize

        40KB

      • memory/1324-47-0x0000000007880000-0x0000000007916000-memory.dmp

        Filesize

        600KB

      • memory/1324-9-0x0000000073FEE000-0x0000000073FEF000-memory.dmp

        Filesize

        4KB

      • memory/1324-49-0x0000000007830000-0x000000000783E000-memory.dmp

        Filesize

        56KB

      • memory/1324-50-0x0000000007840000-0x0000000007855000-memory.dmp

        Filesize

        84KB

      • memory/1324-51-0x0000000007920000-0x000000000793A000-memory.dmp

        Filesize

        104KB

      • memory/1324-52-0x0000000007940000-0x0000000007948000-memory.dmp

        Filesize

        32KB

      • memory/1324-15-0x0000000005BB0000-0x0000000005C16000-memory.dmp

        Filesize

        408KB

      • memory/1324-54-0x00000000088B0000-0x0000000008E56000-memory.dmp

        Filesize

        5.6MB

      • memory/1324-57-0x0000000073FE0000-0x0000000074791000-memory.dmp

        Filesize

        7.7MB

      • memory/1324-10-0x0000000004DF0000-0x0000000004E26000-memory.dmp

        Filesize

        216KB

      • memory/1324-11-0x0000000005510000-0x0000000005B3A000-memory.dmp

        Filesize

        6.2MB

      • memory/1324-12-0x0000000073FE0000-0x0000000074791000-memory.dmp

        Filesize

        7.7MB

      • memory/1324-13-0x0000000073FE0000-0x0000000074791000-memory.dmp

        Filesize

        7.7MB

      • memory/1956-0-0x0000000000580000-0x000000000067A000-memory.dmp

        Filesize

        1000KB

      • memory/1956-2-0x0000000000581000-0x0000000000629000-memory.dmp

        Filesize

        672KB

      • memory/1956-76-0x0000000000580000-0x000000000067A000-memory.dmp

        Filesize

        1000KB

      • memory/1956-68-0x0000000000580000-0x000000000067A000-memory.dmp

        Filesize

        1000KB

      • memory/3696-92-0x00000200B12D0000-0x00000200B12D1000-memory.dmp

        Filesize

        4KB

      • memory/3696-93-0x00000200B12D0000-0x00000200B12D1000-memory.dmp

        Filesize

        4KB

      • memory/3696-87-0x00000200B12D0000-0x00000200B12D1000-memory.dmp

        Filesize

        4KB

      • memory/3696-86-0x00000200B12D0000-0x00000200B12D1000-memory.dmp

        Filesize

        4KB

      • memory/3696-91-0x00000200B12D0000-0x00000200B12D1000-memory.dmp

        Filesize

        4KB

      • memory/3696-96-0x00000200B12D0000-0x00000200B12D1000-memory.dmp

        Filesize

        4KB

      • memory/3696-94-0x00000200B12D0000-0x00000200B12D1000-memory.dmp

        Filesize

        4KB

      • memory/3696-85-0x00000200B12D0000-0x00000200B12D1000-memory.dmp

        Filesize

        4KB

      • memory/3696-95-0x00000200B12D0000-0x00000200B12D1000-memory.dmp

        Filesize

        4KB

      • memory/3696-97-0x00000200B12D0000-0x00000200B12D1000-memory.dmp

        Filesize

        4KB

      • memory/3928-69-0x0000000000C50000-0x0000000000FA9000-memory.dmp

        Filesize

        3.3MB

      • memory/3928-58-0x0000000003250000-0x0000000003251000-memory.dmp

        Filesize

        4KB

      • memory/3928-6-0x0000000003250000-0x0000000003251000-memory.dmp

        Filesize

        4KB

      • memory/3928-75-0x0000000000C50000-0x0000000000FA9000-memory.dmp

        Filesize

        3.3MB