Analysis

  • max time kernel
    30s
  • max time network
    33s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-01-2025 01:27

General

  • Target

    settup.exe

  • Size

    2.5MB

  • MD5

    588fe8868e13672fc1fdea352bde4e42

  • SHA1

    bea94309199c708aaca32782b3ea8dd520471b63

  • SHA256

    d774dc630950d2b7826432c0cd8325d399940204fdafd67eed5fbe21f9536046

  • SHA512

    d17c312ecce5f1b8502308d3d69539744a8b9b680a6512753d0ec49d9da0643db99df7459fb02c47fe81c310c359c89639592c0d9f9e4e1a6d8d8765fc619bfb

  • SSDEEP

    49152:F1u2RjaCzRPaDysOZZ4fYIu6pBcTDu39HgKUFmzS0NbIB+grQQms:aYuMmfnBcP69HgKTC/r

Malware Config

Extracted

Family

quasar

Attributes
  • encryption_key

    UYuffn7sjORhWaLRoveU

  • reconnect_delay

    1200

  • startup_key

    S !qi��QrD�ج�

Signatures

  • Contains code to disable Windows Defender 5 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs
  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 5 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 6 IoCs
  • Windows security modification 2 TTPs 1 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 17 IoCs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Runs ping.exe 1 TTPs 2 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 57 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\settup.exe
    "C:\Users\Admin\AppData\Local\Temp\settup.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3064
    • C:\Users\Admin\AppData\Local\Temp\settup.exe
      "C:\Users\Admin\AppData\Local\Temp\settup.exe"
      2⤵
        PID:2576
      • C:\Users\Admin\AppData\Local\Temp\settup.exe
        "C:\Users\Admin\AppData\Local\Temp\settup.exe"
        2⤵
        • Checks computer location settings
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:868
        • C:\Users\Admin\AppData\Local\Temp\t7Q76efrM7xVSp6Q.exe
          "C:\Users\Admin\AppData\Local\Temp\t7Q76efrM7xVSp6Q.exe" 0
          3⤵
          • Modifies Windows Defender Real-time Protection settings
          • Executes dropped EXE
          • Windows security modification
          PID:964
        • C:\Users\Admin\AppData\Local\Temp\e6e8aqxgJTJhZF6Q.exe
          "C:\Users\Admin\AppData\Local\Temp\e6e8aqxgJTJhZF6Q.exe" 0
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3320
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks" /create /tn "ProtecSys" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\e6e8aqxgJTJhZF6Q.exe" /rl HIGHEST /f
            4⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:1576
          • C:\Users\Admin\AppData\Roaming\SystemServiceProvider\ServiceClient.exe
            "C:\Users\Admin\AppData\Roaming\SystemServiceProvider\ServiceClient.exe"
            4⤵
            • Checks computer location settings
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:2480
            • C:\Windows\SysWOW64\schtasks.exe
              "schtasks" /create /tn "ProtecSys" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SystemServiceProvider\ServiceClient.exe" /rl HIGHEST /f
              5⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:4780
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\pxXBpvJNhyfV.bat" "
              5⤵
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:4472
              • C:\Windows\SysWOW64\chcp.com
                chcp 65001
                6⤵
                • System Location Discovery: System Language Discovery
                PID:2020
              • C:\Windows\SysWOW64\PING.EXE
                ping -n 10 localhost
                6⤵
                • System Location Discovery: System Language Discovery
                • System Network Configuration Discovery: Internet Connection Discovery
                • Runs ping.exe
                PID:1768
              • C:\Users\Admin\AppData\Roaming\SystemServiceProvider\ServiceClient.exe
                "C:\Users\Admin\AppData\Roaming\SystemServiceProvider\ServiceClient.exe"
                6⤵
                • Checks computer location settings
                • Executes dropped EXE
                • System Location Discovery: System Language Discovery
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of SetWindowsHookEx
                • Suspicious use of WriteProcessMemory
                PID:1132
                • C:\Windows\SysWOW64\schtasks.exe
                  "schtasks" /create /tn "ProtecSys" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SystemServiceProvider\ServiceClient.exe" /rl HIGHEST /f
                  7⤵
                  • System Location Discovery: System Language Discovery
                  • Scheduled Task/Job: Scheduled Task
                  PID:3004
                • C:\Windows\SysWOW64\cmd.exe
                  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\ZaDmxY5D63PH.bat" "
                  7⤵
                  • System Location Discovery: System Language Discovery
                  • Suspicious use of WriteProcessMemory
                  PID:3440
                  • C:\Windows\SysWOW64\chcp.com
                    chcp 65001
                    8⤵
                    • System Location Discovery: System Language Discovery
                    PID:3140
                  • C:\Windows\SysWOW64\PING.EXE
                    ping -n 10 localhost
                    8⤵
                    • System Location Discovery: System Language Discovery
                    • System Network Configuration Discovery: Internet Connection Discovery
                    • Runs ping.exe
                    PID:3012
                  • C:\Users\Admin\AppData\Roaming\SystemServiceProvider\ServiceClient.exe
                    "C:\Users\Admin\AppData\Roaming\SystemServiceProvider\ServiceClient.exe"
                    8⤵
                    • Executes dropped EXE
                    • System Location Discovery: System Language Discovery
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of SetWindowsHookEx
                    • Suspicious use of WriteProcessMemory
                    PID:1268
                    • C:\Windows\SysWOW64\schtasks.exe
                      "schtasks" /create /tn "ProtecSys" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SystemServiceProvider\ServiceClient.exe" /rl HIGHEST /f
                      9⤵
                      • System Location Discovery: System Language Discovery
                      • Scheduled Task/Job: Scheduled Task
                      PID:3404
                    • C:\Windows\SysWOW64\cmd.exe
                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\8bNarHbaLeBk.bat" "
                      9⤵
                        PID:1856
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -u -p 1132 -s 2228
                    7⤵
                    • Program crash
                    PID:2248
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 2480 -s 2248
                5⤵
                • Program crash
                PID:4880
          • C:\Users\Admin\AppData\Local\Temp\4c47UZqDTLxzUk4G.exe
            "C:\Users\Admin\AppData\Local\Temp\4c47UZqDTLxzUk4G.exe" 0
            3⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:2108
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2480 -ip 2480
        1⤵
          PID:1148
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 1132 -ip 1132
          1⤵
            PID:224
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 1268 -ip 1268
            1⤵
              PID:1536

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Users\Admin\AppData\Local\Temp\4c47UZqDTLxzUk4G.exe

              Filesize

              295KB

              MD5

              08481f11e5fe4894a359305f22db416f

              SHA1

              7ea518a53bf02495781b163a1289ce83eaa46127

              SHA256

              67de8f33db4ace58a818fc5aed65d860417bf4dd14a1bd5fd7d3a395a8ff7aa3

              SHA512

              74058bd670208222b98443fae3e3e66e1dd8e57a7fe9cdb5d9f5aa134ed1b5945333d820573c12e965910e9c3ca245abfbdd84df1d371d797c59e70ae5630eb4

            • C:\Users\Admin\AppData\Local\Temp\ZaDmxY5D63PH.bat

              Filesize

              229B

              MD5

              2ece1c5be49efdc15a00f2a4d5729773

              SHA1

              870ab1d03384e7b8e69317d6d707c85acb1a576c

              SHA256

              76456500b1bb8eb759979cf834d6b5eb2337737dec0ae13906877da21419cc08

              SHA512

              cccbdbd6d4ca25f19ae6482c4a54097d726340230e8c2bf70900135492a89f5e3d7b8cc6d39b4b1c719f357940569f065fc330ceb01eb90e2df3860576cf9de0

            • C:\Users\Admin\AppData\Local\Temp\e6e8aqxgJTJhZF6Q.exe

              Filesize

              741KB

              MD5

              1d9d229fc4589189714c087250cf6616

              SHA1

              67add27bfbf5c27bfe5f91aad381ab7f8469b144

              SHA256

              b0e4e5ee7f2de968e81efdb89df0d8d7d2d8969a17ec005149d842b9c6df2979

              SHA512

              1efd38348afdc1e2d26a7ca6dfcffd31815101adc107289cc7ed71a523487d852d0f982559ec4c367df340df88e7122e6ae741b2ac1d2a0f974f97e143b64548

            • C:\Users\Admin\AppData\Local\Temp\pxXBpvJNhyfV.bat

              Filesize

              229B

              MD5

              72fdb98c9c166df01d28b5eefa77d9d7

              SHA1

              c1ddcd424a0a668527f69195ed1653c76822fc3a

              SHA256

              cd59784f35a22d79e99345c3c8487e152b8cfb25c173332034daf8b9f5b5fbdf

              SHA512

              231bcf49147831a0a25a6caf92ef97129e9d83b43489c6c552e63c7e8668829984b4a6339ed700dba8cf70a3174b60d5eca7f93d342d2e0e3c6b4804f01039ce

            • C:\Users\Admin\AppData\Local\Temp\t7Q76efrM7xVSp6Q.exe

              Filesize

              9KB

              MD5

              2a4441134fc12a6d704d1f4b2ab58876

              SHA1

              0367169489fa0854d10f6cc0e57392d640d92b36

              SHA256

              42997d05907d02764463b0fbfbfc86a03df8ab6399836cd6511129802b9a2492

              SHA512

              d60bbed90aa1e2547371f2342ed083e068a1933a69df8a7b924e1caa3d7b1e49b33c0bba0c3f261271005a0a8c487679e89f8d2fa0d6169fc7391e4a358000d8

            • C:\Users\Admin\AppData\Roaming\PressTrak\01-01-2025

              Filesize

              224B

              MD5

              c573d383db0f7f97ca6827984677defd

              SHA1

              b5aed073cfbb26be38f398c55f472348b5813b00

              SHA256

              083794821ea614b6cee8d8eda60236aeb6ff724ec356d80f27ec4fd511075ecd

              SHA512

              a1db92289feaa97d257bab0ad94a35bfde686cf05445445e2a6591acea9214042dba2a990546c045846a0a1d012fa19cd5ba6d5220fac1678454a278c5fe248e

            • C:\Users\Admin\AppData\Roaming\PressTrak\01-01-2025

              Filesize

              224B

              MD5

              5722ea7861549dcdd9669e4ac66ee6a1

              SHA1

              8bbbe46eda30ab240780383c91f129bced151d1e

              SHA256

              42f3c31d4947c50a698445244e2e06d3cf62f4252c8d297db134d83c21982e00

              SHA512

              8dec1601e592dba4c1beb16b0c6b6438849875cb081d0771d990a3db8ed487674afff12e8c5ba0343c999ab058175528e2e6c2ce0d08d6c176563d9d45d82d8d

            • memory/868-51-0x0000000000400000-0x000000000067A000-memory.dmp

              Filesize

              2.5MB

            • memory/868-9-0x0000000000400000-0x000000000067A000-memory.dmp

              Filesize

              2.5MB

            • memory/868-11-0x0000000000400000-0x000000000067A000-memory.dmp

              Filesize

              2.5MB

            • memory/964-40-0x0000000000290000-0x0000000000298000-memory.dmp

              Filesize

              32KB

            • memory/964-41-0x00007FFD9A223000-0x00007FFD9A225000-memory.dmp

              Filesize

              8KB

            • memory/3064-7-0x00000000059D0000-0x0000000005C52000-memory.dmp

              Filesize

              2.5MB

            • memory/3064-4-0x00000000050A0000-0x00000000050AA000-memory.dmp

              Filesize

              40KB

            • memory/3064-5-0x0000000005170000-0x00000000051E6000-memory.dmp

              Filesize

              472KB

            • memory/3064-8-0x0000000005330000-0x000000000534E000-memory.dmp

              Filesize

              120KB

            • memory/3064-15-0x00000000749C0000-0x0000000075170000-memory.dmp

              Filesize

              7.7MB

            • memory/3064-1-0x00000000003B0000-0x0000000000634000-memory.dmp

              Filesize

              2.5MB

            • memory/3064-0-0x00000000749CE000-0x00000000749CF000-memory.dmp

              Filesize

              4KB

            • memory/3064-2-0x0000000005420000-0x00000000059C4000-memory.dmp

              Filesize

              5.6MB

            • memory/3064-3-0x0000000004F10000-0x0000000004FA2000-memory.dmp

              Filesize

              584KB

            • memory/3064-6-0x00000000749C0000-0x0000000075170000-memory.dmp

              Filesize

              7.7MB

            • memory/3320-55-0x0000000005E20000-0x0000000005E5C000-memory.dmp

              Filesize

              240KB

            • memory/3320-54-0x00000000058E0000-0x00000000058F2000-memory.dmp

              Filesize

              72KB

            • memory/3320-53-0x0000000004C90000-0x0000000004CF6000-memory.dmp

              Filesize

              408KB

            • memory/3320-49-0x0000000000290000-0x0000000000350000-memory.dmp

              Filesize

              768KB