Analysis

  • max time kernel
    83s
  • max time network
    87s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    25-12-2024 00:33

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

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 2 IoCs
  • Executes dropped EXE 11 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 7 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 7 IoCs

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

  • Modifies registry class 25 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 20 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:3500
    • C:\Users\Admin\AppData\Local\Temp\is-GOISH.tmp\emmasBackdoor.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-GOISH.tmp\emmasBackdoor.tmp" /SL5="$602E4,1909968,965632,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:3116
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" -ExecutionPolicy Bypass -File "C:\Users\Admin\AppData\Local\Temp\is-0QL3U.tmp\disable_defender.ps1"
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1284
      • 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:4244
        • 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:5856
        • 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:4952
          • 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:4348
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:4520
    • C:\Program Files (x86)\EmmasBackdoor\unins000.exe
      "C:\Program Files (x86)\EmmasBackdoor\unins000.exe"
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1320
      • C:\Users\Admin\AppData\Local\Temp\iu-14D2N.tmp\_unins.tmp
        "C:\Users\Admin\AppData\Local\Temp\iu-14D2N.tmp\_unins.tmp" /SECONDPHASE="C:\Program Files (x86)\EmmasBackdoor\unins000.exe" /FIRSTPHASEWND=$5002A
        2⤵
        • Executes dropped EXE
        • Drops file in Program Files directory
        • System Location Discovery: System Language Discovery
        PID:5380
    • C:\Program Files (x86)\EmmasBackdoor\Client.exe
      "C:\Program Files (x86)\EmmasBackdoor\Client.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:404
    • C:\Program Files (x86)\EmmasBackdoor\Client.exe
      "C:\Program Files (x86)\EmmasBackdoor\Client.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:5352
    • C:\Program Files (x86)\EmmasBackdoor\Client.exe
      "C:\Program Files (x86)\EmmasBackdoor\Client.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:3180
    • C:\Program Files (x86)\EmmasBackdoor\Client.exe
      "C:\Program Files (x86)\EmmasBackdoor\Client.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1444
    • C:\Program Files (x86)\EmmasBackdoor\unins000.exe
      "C:\Program Files (x86)\EmmasBackdoor\unins000.exe"
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2420
      • C:\Users\Admin\AppData\Local\Temp\iu-14D2N.tmp\_unins.tmp
        "C:\Users\Admin\AppData\Local\Temp\iu-14D2N.tmp\_unins.tmp" /SECONDPHASE="C:\Program Files (x86)\EmmasBackdoor\unins000.exe" /FIRSTPHASEWND=$B02E2
        2⤵
        • Executes dropped EXE
        • Drops file in Program Files directory
        • System Location Discovery: System Language Discovery
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:2280

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      3.1MB

      MD5

      66ebe604ddf4d6ab60a183f515536528

      SHA1

      278782873ae0a5cac94add051edfc12e223be55c

      SHA256

      37e733731381c02941e4a8da30350cf968532d08012b6bb91e525241e8ee2c86

      SHA512

      756de51b5f6116640736f7dd37faf6172db79c8eaf8da17ba1e3d788d5c0179a01746f7d30044ca5c535c1b3d938bfde3e5d810b7fe50815030be8a5288c2bf9

    • C:\Program Files (x86)\EmmasBackdoor\unins000.dat

      Filesize

      5KB

      MD5

      7a16ea47635829ee28cec05eb69e7739

      SHA1

      5f2d285a6ddad7bc25628c8bdcf377320744143c

      SHA256

      17f56538f4a3a76289c9962431b0a9dd7d8f7ce06b16b540e911a6bb476649ce

      SHA512

      e11f19a68a1ac599b54934f64d188f109a92dde0f403c492b37f4283ea6f865f9c63045e99c5bb40632ec309dc0b7495909c62ef0697e7eda6f806770df2ca64

    • C:\Program Files (x86)\EmmasBackdoor\unins000.exe

      Filesize

      3.3MB

      MD5

      40241dd8f313363eaa5757d57dee2f1d

      SHA1

      42669c3dc9080eb7aed3e2c3235412922ea3e731

      SHA256

      8908c91c6c53b346cf416e28027132e10f399da42aee6e82b086fe79e8f964ff

      SHA512

      33f05439f0318e89dc38e05519c9662d97f0d0125d7f7236815973a0da13181ac99cb5cbc80b558e361bc04118b00379a341c8ead652897d2927400ee0322b8c

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

      Filesize

      1KB

      MD5

      811bd01946498cc37637ed7718a453d0

      SHA1

      5af22e4f0f025e4fd321d6168ba5cf9929944292

      SHA256

      211a9351c34726b08f6a5f4b6d86141ff37a4eae3832704672d8792b3d68996b

      SHA512

      395e2f996172a16da2c1301740e5dad7d709648ba3bdc620447296ff3cae2fa835d0a7c208ef2f9d5b13d153c1f3a3f624a3f04683bcf90bf8a6e7087569a756

    • 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_tlwkolmy.wgt.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Local\Temp\is-0QL3U.tmp\disable_defender.ps1

      Filesize

      544B

      MD5

      3568227fbb730d48fa31d13e87f9a370

      SHA1

      83ac8fbb2b9c35337f372977fe3323f63060c5ff

      SHA256

      a06e1c77a4ab2a13f90dc2f86bbb4cb662f2bd10b1f805b1b7745af4c2ad3698

      SHA512

      2b8863dbdc4c980eac867e600ca008261d046a99bf40cfc02a350ec45a04e3a7b958b21219ad0a26b339336f779ba167aa84c45dbe4d9d9ada004c4515ba6d17

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

      Filesize

      3.3MB

      MD5

      95c49a50069cf27284ac7b186df5aae0

      SHA1

      4120193848e7726aac277f9ea6e4b3670342ed03

      SHA256

      9f62b6f4c234ded050162b55a9c6de0c604578dee34462b96615e48169a485bb

      SHA512

      f6d3fd7454943aac838cd81e17c35787747185e0736823424453ffbf375da1e921dba0a5ce88a05f7a71e2ac367d47ee8fbabbd529f48997b99f1a3afa5370cd

    • C:\Users\Public\Desktop\EmmasBackdoor.lnk

      Filesize

      1KB

      MD5

      2d1d45a4b6667099cbcaaaaf08f467f2

      SHA1

      efe9a4d393a5bb7bbfec3436cbae6dd2218d4e73

      SHA256

      b2d69b36b5b3162e46571af1a363def3af44c5a1243815c493b6b267bc834f8c

      SHA512

      a4ac492bc2a2abdc5f9394caf42c8bfb47562364db9180ef0764927fadcbcc8e32fe1b297ae51331bb9acd1798710662407a711ade6c2eb3669c93f483ca42fd

    • memory/1284-46-0x00000000076A0000-0x00000000076AA000-memory.dmp

      Filesize

      40KB

    • memory/1284-52-0x0000000007990000-0x0000000007998000-memory.dmp

      Filesize

      32KB

    • memory/1284-16-0x0000000005550000-0x00000000055B6000-memory.dmp

      Filesize

      408KB

    • memory/1284-14-0x0000000005430000-0x0000000005452000-memory.dmp

      Filesize

      136KB

    • memory/1284-25-0x0000000005E60000-0x00000000061B7000-memory.dmp

      Filesize

      3.3MB

    • memory/1284-26-0x00000000062E0000-0x00000000062FE000-memory.dmp

      Filesize

      120KB

    • memory/1284-27-0x0000000006320000-0x000000000636C000-memory.dmp

      Filesize

      304KB

    • memory/1284-13-0x00000000742E0000-0x0000000074A91000-memory.dmp

      Filesize

      7.7MB

    • memory/1284-39-0x0000000006920000-0x000000000693E000-memory.dmp

      Filesize

      120KB

    • memory/1284-29-0x00000000068E0000-0x0000000006914000-memory.dmp

      Filesize

      208KB

    • memory/1284-30-0x00000000704F0000-0x000000007053C000-memory.dmp

      Filesize

      304KB

    • memory/1284-40-0x00000000742E0000-0x0000000074A91000-memory.dmp

      Filesize

      7.7MB

    • memory/1284-41-0x00000000742E0000-0x0000000074A91000-memory.dmp

      Filesize

      7.7MB

    • memory/1284-42-0x0000000007510000-0x00000000075B4000-memory.dmp

      Filesize

      656KB

    • memory/1284-43-0x00000000742E0000-0x0000000074A91000-memory.dmp

      Filesize

      7.7MB

    • memory/1284-44-0x0000000007C90000-0x000000000830A000-memory.dmp

      Filesize

      6.5MB

    • memory/1284-45-0x0000000007640000-0x000000000765A000-memory.dmp

      Filesize

      104KB

    • memory/1284-9-0x00000000742EE000-0x00000000742EF000-memory.dmp

      Filesize

      4KB

    • memory/1284-47-0x00000000078D0000-0x0000000007966000-memory.dmp

      Filesize

      600KB

    • memory/1284-48-0x0000000007840000-0x0000000007851000-memory.dmp

      Filesize

      68KB

    • memory/1284-49-0x0000000007880000-0x000000000788E000-memory.dmp

      Filesize

      56KB

    • memory/1284-50-0x0000000007890000-0x00000000078A5000-memory.dmp

      Filesize

      84KB

    • memory/1284-51-0x0000000007970000-0x000000000798A000-memory.dmp

      Filesize

      104KB

    • memory/1284-15-0x00000000054E0000-0x0000000005546000-memory.dmp

      Filesize

      408KB

    • memory/1284-53-0x00000000079C0000-0x00000000079E2000-memory.dmp

      Filesize

      136KB

    • memory/1284-54-0x00000000088C0000-0x0000000008E66000-memory.dmp

      Filesize

      5.6MB

    • memory/1284-57-0x00000000742E0000-0x0000000074A91000-memory.dmp

      Filesize

      7.7MB

    • memory/1284-10-0x0000000002AD0000-0x0000000002B06000-memory.dmp

      Filesize

      216KB

    • memory/1284-12-0x0000000005780000-0x0000000005DAA000-memory.dmp

      Filesize

      6.2MB

    • memory/1284-11-0x00000000742E0000-0x0000000074A91000-memory.dmp

      Filesize

      7.7MB

    • memory/1320-99-0x0000000000D30000-0x0000000001089000-memory.dmp

      Filesize

      3.3MB

    • memory/2280-118-0x00000000007D0000-0x0000000000B29000-memory.dmp

      Filesize

      3.3MB

    • memory/2420-116-0x0000000000D30000-0x0000000001089000-memory.dmp

      Filesize

      3.3MB

    • memory/3116-58-0x0000000002BD0000-0x0000000002BD1000-memory.dmp

      Filesize

      4KB

    • memory/3116-84-0x0000000000490000-0x00000000007E9000-memory.dmp

      Filesize

      3.3MB

    • memory/3116-60-0x0000000000490000-0x00000000007E9000-memory.dmp

      Filesize

      3.3MB

    • memory/3116-6-0x0000000002BD0000-0x0000000002BD1000-memory.dmp

      Filesize

      4KB

    • memory/3500-85-0x0000000000AD0000-0x0000000000BCA000-memory.dmp

      Filesize

      1000KB

    • memory/3500-59-0x0000000000AD0000-0x0000000000BCA000-memory.dmp

      Filesize

      1000KB

    • memory/3500-2-0x0000000000AD1000-0x0000000000B79000-memory.dmp

      Filesize

      672KB

    • memory/3500-0-0x0000000000AD0000-0x0000000000BCA000-memory.dmp

      Filesize

      1000KB

    • memory/4244-76-0x0000000000E90000-0x00000000011B4000-memory.dmp

      Filesize

      3.1MB

    • memory/4952-87-0x000000001BDF0000-0x000000001BEA2000-memory.dmp

      Filesize

      712KB

    • memory/4952-86-0x000000001B1C0000-0x000000001B210000-memory.dmp

      Filesize

      320KB

    • memory/5380-98-0x0000000000FB0000-0x0000000001309000-memory.dmp

      Filesize

      3.3MB