Analysis

  • max time kernel
    94s
  • max time network
    142s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-01-2025 08:37

General

  • Target

    RFQ.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 3 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 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RFQ.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4508
    • 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\RFQ.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4560
    • 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:812
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OLHTuSLw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBAB5.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:4768
    • C:\Users\Admin\AppData\Local\Temp\RFQ.exe
      "C:\Users\Admin\AppData\Local\Temp\RFQ.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2476
      • 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:2920
      • 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:4020
        • 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:364
        • 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:4520
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OLHTuSLw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4ED.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:2160
        • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
          4⤵
          • Executes dropped EXE
          PID:4460
        • 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:2644
          • 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:3896

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\RFQ.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

    3d086a433708053f9bf9523e1d87a4e8

    SHA1

    b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28

    SHA256

    6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69

    SHA512

    931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd

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

    Filesize

    664B

    MD5

    09413051ebc7846d9220ed6b7a854d43

    SHA1

    1c5bce7007604cc9de34e28bfc3ffa6bb9838302

    SHA256

    46cfc7e98f48cd0f95047f3f8649883165a8cba72472ba9cc3d65e86f8378377

    SHA512

    7e7440ec2ec879aa07a12655eda3d93a23cb6299e178284fb5076e0d27eb119ba1cf7360f92200f3c6fe5ec17bcc6610629c9a09f9bdc7e092cea25bc6f3b7e3

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

    Filesize

    18KB

    MD5

    be0100a9210aa93e43864799576bbc85

    SHA1

    46ae23727ad5f5884d988a4868318cd03aacb1d4

    SHA256

    a93f33a9fc4b8e9d755c9d17738bcf232861dbe8498f54e8ee81c22976a99f06

    SHA512

    f7d8843c2d0214371cd574ea0469f390b8dc129c98889ecb2100918b3f5d76e8d8da8ec7f1837d68271e51f53e65104fa98010ec5710b94d36586af4b3971a08

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_oeozsfqq.w4t.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmpBAB5.tmp

    Filesize

    1KB

    MD5

    aea025a3b7afb8e555efd923d413253f

    SHA1

    237ae80587cf805a031a2ebfa0edb05721f2b46c

    SHA256

    545b79bf343211a10971b90f455ad2553cf365b7fe4b1c46fad900d11d824a5d

    SHA512

    5918b9a56b7fa9423584ea6519062fffeb8f636e450279f002a3809ba0563ec1c9074e0ee4b5d561406248485542755fdd1cd027b2eda18b840f005a8938a09a

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

    Filesize

    3.8MB

    MD5

    df29ee043d88f265cd76747f62ab3ea7

    SHA1

    0594a814e05c80618a72a865fa53d24fd351db5b

    SHA256

    1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0

    SHA512

    7826bc0582819fb165b25c21fd5a9385b47332201a464b8ae4a035d65f0b3c7ece75507ba0acfa92a6e8b55f2a18ba83344dbf3db264be7d43d3beb5796384a1

  • memory/364-132-0x0000000071970000-0x00000000719BC000-memory.dmp

    Filesize

    304KB

  • memory/812-63-0x0000000007910000-0x000000000792E000-memory.dmp

    Filesize

    120KB

  • memory/812-80-0x0000000007C50000-0x0000000007C6A000-memory.dmp

    Filesize

    104KB

  • memory/812-51-0x00000000078D0000-0x0000000007902000-memory.dmp

    Filesize

    200KB

  • memory/812-49-0x00000000069C0000-0x0000000006A0C000-memory.dmp

    Filesize

    304KB

  • memory/812-48-0x0000000006940000-0x000000000695E000-memory.dmp

    Filesize

    120KB

  • memory/812-52-0x0000000075AA0000-0x0000000075AEC000-memory.dmp

    Filesize

    304KB

  • memory/812-64-0x0000000007B30000-0x0000000007BD3000-memory.dmp

    Filesize

    652KB

  • memory/812-93-0x0000000075210000-0x00000000759C0000-memory.dmp

    Filesize

    7.7MB

  • memory/812-20-0x0000000075210000-0x00000000759C0000-memory.dmp

    Filesize

    7.7MB

  • memory/812-85-0x0000000007E90000-0x0000000007EA4000-memory.dmp

    Filesize

    80KB

  • memory/812-22-0x0000000075210000-0x00000000759C0000-memory.dmp

    Filesize

    7.7MB

  • memory/812-83-0x0000000007E50000-0x0000000007E61000-memory.dmp

    Filesize

    68KB

  • memory/812-82-0x0000000007ED0000-0x0000000007F66000-memory.dmp

    Filesize

    600KB

  • memory/812-81-0x0000000007CC0000-0x0000000007CCA000-memory.dmp

    Filesize

    40KB

  • memory/812-79-0x00000000082A0000-0x000000000891A000-memory.dmp

    Filesize

    6.5MB

  • memory/2476-44-0x0000000000400000-0x0000000000724000-memory.dmp

    Filesize

    3.1MB

  • memory/2644-143-0x0000000006B50000-0x0000000007168000-memory.dmp

    Filesize

    6.1MB

  • memory/2644-144-0x00000000066F0000-0x0000000006740000-memory.dmp

    Filesize

    320KB

  • memory/2644-145-0x0000000006960000-0x0000000006A12000-memory.dmp

    Filesize

    712KB

  • memory/2644-153-0x0000000006B20000-0x0000000006B32000-memory.dmp

    Filesize

    72KB

  • memory/2644-154-0x0000000007FB0000-0x0000000007FEC000-memory.dmp

    Filesize

    240KB

  • memory/4508-7-0x00000000058D0000-0x00000000058EA000-memory.dmp

    Filesize

    104KB

  • memory/4508-4-0x0000000005630000-0x000000000563A000-memory.dmp

    Filesize

    40KB

  • memory/4508-10-0x0000000008770000-0x0000000008AD8000-memory.dmp

    Filesize

    3.4MB

  • memory/4508-5-0x0000000075210000-0x00000000759C0000-memory.dmp

    Filesize

    7.7MB

  • memory/4508-6-0x00000000086D0000-0x000000000876C000-memory.dmp

    Filesize

    624KB

  • memory/4508-47-0x0000000075210000-0x00000000759C0000-memory.dmp

    Filesize

    7.7MB

  • memory/4508-1-0x0000000000900000-0x0000000000CD0000-memory.dmp

    Filesize

    3.8MB

  • memory/4508-2-0x0000000005B40000-0x00000000060E4000-memory.dmp

    Filesize

    5.6MB

  • memory/4508-9-0x0000000075210000-0x00000000759C0000-memory.dmp

    Filesize

    7.7MB

  • memory/4508-3-0x0000000005590000-0x0000000005622000-memory.dmp

    Filesize

    584KB

  • memory/4508-0-0x000000007521E000-0x000000007521F000-memory.dmp

    Filesize

    4KB

  • memory/4508-8-0x000000007521E000-0x000000007521F000-memory.dmp

    Filesize

    4KB

  • memory/4520-146-0x0000000007B20000-0x0000000007B31000-memory.dmp

    Filesize

    68KB

  • memory/4520-133-0x00000000077A0000-0x0000000007843000-memory.dmp

    Filesize

    652KB

  • memory/4520-121-0x0000000006720000-0x000000000676C000-memory.dmp

    Filesize

    304KB

  • memory/4520-122-0x0000000071970000-0x00000000719BC000-memory.dmp

    Filesize

    304KB

  • memory/4520-147-0x0000000007B50000-0x0000000007B64000-memory.dmp

    Filesize

    80KB

  • memory/4520-102-0x0000000005F50000-0x00000000062A4000-memory.dmp

    Filesize

    3.3MB

  • memory/4560-23-0x0000000004FA0000-0x0000000004FC2000-memory.dmp

    Filesize

    136KB

  • memory/4560-16-0x0000000075210000-0x00000000759C0000-memory.dmp

    Filesize

    7.7MB

  • memory/4560-66-0x0000000075AA0000-0x0000000075AEC000-memory.dmp

    Filesize

    304KB

  • memory/4560-86-0x00000000075D0000-0x00000000075EA000-memory.dmp

    Filesize

    104KB

  • memory/4560-94-0x0000000075210000-0x00000000759C0000-memory.dmp

    Filesize

    7.7MB

  • memory/4560-45-0x0000000005950000-0x0000000005CA4000-memory.dmp

    Filesize

    3.3MB

  • memory/4560-18-0x0000000075210000-0x00000000759C0000-memory.dmp

    Filesize

    7.7MB

  • memory/4560-19-0x0000000075210000-0x00000000759C0000-memory.dmp

    Filesize

    7.7MB

  • memory/4560-17-0x0000000005140000-0x0000000005768000-memory.dmp

    Filesize

    6.2MB

  • memory/4560-84-0x00000000074C0000-0x00000000074CE000-memory.dmp

    Filesize

    56KB

  • memory/4560-24-0x0000000005770000-0x00000000057D6000-memory.dmp

    Filesize

    408KB

  • memory/4560-25-0x00000000058E0000-0x0000000005946000-memory.dmp

    Filesize

    408KB

  • memory/4560-15-0x0000000002650000-0x0000000002686000-memory.dmp

    Filesize

    216KB

  • memory/4560-87-0x00000000075B0000-0x00000000075B8000-memory.dmp

    Filesize

    32KB