Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15-01-2025 02:11

General

  • Target

    1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe

  • Size

    3.8MB

  • MD5

    df29ee043d88f265cd76747f62ab3ea7

  • SHA1

    0594a814e05c80618a72a865fa53d24fd351db5b

  • SHA256

    1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0

  • SHA512

    7826bc0582819fb165b25c21fd5a9385b47332201a464b8ae4a035d65f0b3c7ece75507ba0acfa92a6e8b55f2a18ba83344dbf3db264be7d43d3beb5796384a1

  • SSDEEP

    98304:WhZ14lAzlFFzMsYLtZvQ1pVjLvAMQkWS27MtXE:WhZ1AAvFzMBNQTBIMQkXtX

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

gasplant

C2

toolsbox.ydns.eu:20901

Mutex

33714128-68e4-4509-bd32-b7e414783d3eDtWike

Attributes
  • encryption_key

    43CBFE44C367A91A79A79C9E1778A82D0B498870

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 12 IoCs

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

  • 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 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 49 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe
    "C:\Users\Admin\AppData\Local\Temp\1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1964
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4540
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\OLHTuSLw.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:524
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OLHTuSLw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF1C2.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3976
    • C:\Users\Admin\AppData\Local\Temp\1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe
      "C:\Users\Admin\AppData\Local\Temp\1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2364
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:1596
      • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2160
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1792
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\OLHTuSLw.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3328
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OLHTuSLw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3FE2.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:432
        • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
          4⤵
          • Executes dropped EXE
          PID:1856
        • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
          4⤵
          • Executes dropped EXE
          PID:3440
        • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1876
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:3244

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe.log

    Filesize

    1KB

    MD5

    8ec831f3e3a3f77e4a7b9cd32b48384c

    SHA1

    d83f09fd87c5bd86e045873c231c14836e76a05c

    SHA256

    7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

    SHA512

    26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

    Filesize

    2KB

    MD5

    968cb9309758126772781b83adb8a28f

    SHA1

    8da30e71accf186b2ba11da1797cf67f8f78b47c

    SHA256

    92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

    SHA512

    4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    18KB

    MD5

    7a540e5b2f4b7321fc4df36c12297c31

    SHA1

    58ae2031a34eddf90e9d565a11457be0dc237a56

    SHA256

    12a84d2871d96b41b444d8eb0fafa62b144c169e0abeb1950e5d04a1a117e98a

    SHA512

    24d0a59f0be2226a1fbf818202804b9526a4c58fe1352dc6c8f38d13c44046af1416cc7dd644dc802b8d94488b1c75527056e53161222fcdcc44629ae912093e

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    18KB

    MD5

    84183f42af3a2aa06679bdc8b7e32573

    SHA1

    302ad6507a9adf05c2ae575a7feb6d4fee50d7a8

    SHA256

    36857ca31811ce5028259d9f7efadeb5afeac9cb65f6941ce923251c1e37e880

    SHA512

    dfb094368f53df9c9bd5dd142add7b972d0911ee6627895d1e2693a2987ee05ee565c60d2a7f77e009b48ec943c77d12cda70a3931d89f5062eee4c09318b67f

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_skzkw5sq.dib.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmpF1C2.tmp

    Filesize

    1KB

    MD5

    ebd2d620540842c346c8e52cad6590d0

    SHA1

    34b736dcee1cb12abee9f6bdd1e4a7d016ca836c

    SHA256

    9d0de3dd66aebf64c0d2f8005df290f864a249960d27db35f52893473bcf4e68

    SHA512

    57368d19eeb42bb6222b1407d92b08178fc407a8cdab541334ce372fcb11971dfc0fd5e1dc36d166bfd5df8abd6946efb6e4e216e3c1f336432fa17232c32b94

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

    Filesize

    3.8MB

    MD5

    df29ee043d88f265cd76747f62ab3ea7

    SHA1

    0594a814e05c80618a72a865fa53d24fd351db5b

    SHA256

    1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0

    SHA512

    7826bc0582819fb165b25c21fd5a9385b47332201a464b8ae4a035d65f0b3c7ece75507ba0acfa92a6e8b55f2a18ba83344dbf3db264be7d43d3beb5796384a1

  • memory/524-55-0x0000000075B80000-0x0000000075BCC000-memory.dmp

    Filesize

    304KB

  • memory/524-54-0x00000000070D0000-0x0000000007102000-memory.dmp

    Filesize

    200KB

  • memory/524-68-0x0000000007310000-0x000000000732E000-memory.dmp

    Filesize

    120KB

  • memory/524-81-0x0000000007490000-0x00000000074AA000-memory.dmp

    Filesize

    104KB

  • memory/524-80-0x0000000007AD0000-0x000000000814A000-memory.dmp

    Filesize

    6.5MB

  • memory/524-25-0x0000000005B00000-0x0000000005B66000-memory.dmp

    Filesize

    408KB

  • memory/524-82-0x0000000007500000-0x000000000750A000-memory.dmp

    Filesize

    40KB

  • memory/524-45-0x00000000752D0000-0x0000000075A80000-memory.dmp

    Filesize

    7.7MB

  • memory/524-23-0x0000000005A90000-0x0000000005AF6000-memory.dmp

    Filesize

    408KB

  • memory/524-20-0x00000000752D0000-0x0000000075A80000-memory.dmp

    Filesize

    7.7MB

  • memory/524-94-0x00000000752D0000-0x0000000075A80000-memory.dmp

    Filesize

    7.7MB

  • memory/524-24-0x00000000752D0000-0x0000000075A80000-memory.dmp

    Filesize

    7.7MB

  • memory/1792-149-0x0000000007990000-0x00000000079A4000-memory.dmp

    Filesize

    80KB

  • memory/1792-146-0x0000000007950000-0x0000000007961000-memory.dmp

    Filesize

    68KB

  • memory/1792-122-0x0000000006470000-0x00000000064BC000-memory.dmp

    Filesize

    304KB

  • memory/1792-135-0x0000000070D70000-0x0000000070DBC000-memory.dmp

    Filesize

    304KB

  • memory/1876-147-0x0000000006380000-0x00000000063D0000-memory.dmp

    Filesize

    320KB

  • memory/1876-145-0x0000000006800000-0x0000000006E18000-memory.dmp

    Filesize

    6.1MB

  • memory/1876-148-0x00000000065F0000-0x00000000066A2000-memory.dmp

    Filesize

    712KB

  • memory/1964-10-0x00000000085C0000-0x0000000008928000-memory.dmp

    Filesize

    3.4MB

  • memory/1964-5-0x0000000005520000-0x000000000552A000-memory.dmp

    Filesize

    40KB

  • memory/1964-1-0x00000000005C0000-0x0000000000990000-memory.dmp

    Filesize

    3.8MB

  • memory/1964-2-0x0000000005940000-0x0000000005EE4000-memory.dmp

    Filesize

    5.6MB

  • memory/1964-3-0x0000000005390000-0x0000000005422000-memory.dmp

    Filesize

    584KB

  • memory/1964-0-0x00000000752DE000-0x00000000752DF000-memory.dmp

    Filesize

    4KB

  • memory/1964-9-0x00000000752D0000-0x0000000075A80000-memory.dmp

    Filesize

    7.7MB

  • memory/1964-8-0x00000000752DE000-0x00000000752DF000-memory.dmp

    Filesize

    4KB

  • memory/1964-7-0x00000000058D0000-0x00000000058EA000-memory.dmp

    Filesize

    104KB

  • memory/1964-6-0x0000000008520000-0x00000000085BC000-memory.dmp

    Filesize

    624KB

  • memory/1964-48-0x00000000752D0000-0x0000000075A80000-memory.dmp

    Filesize

    7.7MB

  • memory/1964-4-0x00000000752D0000-0x0000000075A80000-memory.dmp

    Filesize

    7.7MB

  • memory/2364-46-0x0000000000400000-0x0000000000724000-memory.dmp

    Filesize

    3.1MB

  • memory/3328-134-0x0000000007490000-0x0000000007533000-memory.dmp

    Filesize

    652KB

  • memory/3328-102-0x0000000005E10000-0x0000000006164000-memory.dmp

    Filesize

    3.3MB

  • memory/3328-124-0x0000000070D70000-0x0000000070DBC000-memory.dmp

    Filesize

    304KB

  • memory/4540-18-0x00000000752D0000-0x0000000075A80000-memory.dmp

    Filesize

    7.7MB

  • memory/4540-87-0x0000000007B40000-0x0000000007B5A000-memory.dmp

    Filesize

    104KB

  • memory/4540-88-0x0000000007B20000-0x0000000007B28000-memory.dmp

    Filesize

    32KB

  • memory/4540-86-0x0000000007A40000-0x0000000007A54000-memory.dmp

    Filesize

    80KB

  • memory/4540-85-0x0000000007A30000-0x0000000007A3E000-memory.dmp

    Filesize

    56KB

  • memory/4540-95-0x00000000752D0000-0x0000000075A80000-memory.dmp

    Filesize

    7.7MB

  • memory/4540-84-0x0000000007A00000-0x0000000007A11000-memory.dmp

    Filesize

    68KB

  • memory/4540-83-0x0000000007A80000-0x0000000007B16000-memory.dmp

    Filesize

    600KB

  • memory/4540-79-0x00000000076C0000-0x0000000007763000-memory.dmp

    Filesize

    652KB

  • memory/4540-69-0x0000000075B80000-0x0000000075BCC000-memory.dmp

    Filesize

    304KB

  • memory/4540-50-0x0000000006850000-0x000000000689C000-memory.dmp

    Filesize

    304KB

  • memory/4540-49-0x00000000064B0000-0x00000000064CE000-memory.dmp

    Filesize

    120KB

  • memory/4540-35-0x0000000005FD0000-0x0000000006324000-memory.dmp

    Filesize

    3.3MB

  • memory/4540-21-0x0000000005D50000-0x0000000005D72000-memory.dmp

    Filesize

    136KB

  • memory/4540-19-0x00000000752D0000-0x0000000075A80000-memory.dmp

    Filesize

    7.7MB

  • memory/4540-17-0x00000000055C0000-0x0000000005BE8000-memory.dmp

    Filesize

    6.2MB

  • memory/4540-16-0x00000000752D0000-0x0000000075A80000-memory.dmp

    Filesize

    7.7MB

  • memory/4540-15-0x0000000002BA0000-0x0000000002BD6000-memory.dmp

    Filesize

    216KB