Analysis

  • max time kernel
    142s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06-02-2025 07:16

General

  • Target

    c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe

  • Size

    3.2MB

  • MD5

    a2f9781e42a8da5eb3cbe8a4dba009e6

  • SHA1

    61baaae3da49b0985fa32e6ef9c6ca7a422e0eb4

  • SHA256

    c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49

  • SHA512

    fc5b0416333ba59d7af489255f258db879bf1b7639000a54ff233b100cb50ff57f0026512d58fb540d87cdac0a398c1b796ef4156cd8293e4a1978b2f4c0aa15

  • SSDEEP

    98304:1OXPiu6YrHfZ1diRq+/gr56mQr+dFiJzqGT4q:Qiu6MfZ1dt+AVq6mei4q

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svchost32

C2

185.147.124.146:4782

Mutex

70595b2f-92ed-4cab-b358-5e9c155366b4

Attributes
  • encryption_key

    B207941BD17A6DAD99D4F816F934730315BCD00D

  • 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
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 8 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

    Run Powershell to execute payload.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 22 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe
    "C:\Users\Admin\AppData\Local\Temp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2780
    • C:\Users\Admin\AppData\Local\Temp\is-J81TC.tmp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-J81TC.tmp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp" /SL5="$C01DA,2956477,245248,C:\Users\Admin\AppData\Local\Temp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3056
      • C:\Users\Admin\AppData\Local\Temp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe
        "C:\Users\Admin\AppData\Local\Temp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe" /VERYSILENT
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3024
        • C:\Users\Admin\AppData\Local\Temp\is-Q17L5.tmp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp
          "C:\Users\Admin\AppData\Local\Temp\is-Q17L5.tmp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp" /SL5="$701C2,2956477,245248,C:\Users\Admin\AppData\Local\Temp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe" /VERYSILENT
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of WriteProcessMemory
          PID:2948
          • C:\Windows\SysWOW64\regsvr32.exe
            "regsvr32.exe" /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\d3d9_4.drv"
            5⤵
            • Loads dropped DLL
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:3684
            • C:\Windows\system32\regsvr32.exe
              /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\d3d9_4.drv"
              6⤵
              • Loads dropped DLL
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:1328
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/S /i:SYNC C:\Users\Admin\AppData\Roaming\d3d9_4.drv' }) { exit 0 } else { exit 1 }"
                7⤵
                • Command and Scripting Interpreter: PowerShell
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:216
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "powershell" "Register-ScheduledTask -Action (New-ScheduledTaskAction -Execute \"regsvr32\" -Argument \"/S /i:SYNC C:\Users\Admin\AppData\Roaming\d3d9_4.drv\") -Trigger (New-ScheduledTaskTrigger -Once -At (Get-Date).AddMinutes(1) -RepetitionInterval (New-TimeSpan -Minutes 1)) -TaskName 'MicrosoftEdgeUpdateTaskMachineUA{F54400AD-C0D7-44CD-84E5-B490DD373E47}' -Description 'MicrosoftEdgeUpdateTaskMachineUA' -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -ExecutionTimeLimit 0) -RunLevel Highest"
                7⤵
                • Command and Scripting Interpreter: PowerShell
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:3388
  • C:\Windows\system32\regsvr32.EXE
    C:\Windows\system32\regsvr32.EXE /S /i:SYNC C:\Users\Admin\AppData\Roaming\d3d9_4.drv
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4624
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/S /i:SYNC C:\Users\Admin\AppData\Roaming\d3d9_4.drv' }) { exit 0 } else { exit 1 }"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      PID:3244
  • C:\Windows\system32\regsvr32.EXE
    C:\Windows\system32\regsvr32.EXE /S /i:SYNC C:\Users\Admin\AppData\Roaming\d3d9_4.drv
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2680
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/S /i:SYNC C:\Users\Admin\AppData\Roaming\d3d9_4.drv' }) { exit 0 } else { exit 1 }"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      PID:2988

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    3KB

    MD5

    661739d384d9dfd807a089721202900b

    SHA1

    5b2c5d6a7122b4ce849dc98e79a7713038feac55

    SHA256

    70c3ecbaa6df88e88df4efc70968502955e890a2248269641c4e2d4668ef61bf

    SHA512

    81b48ae5c4064c4d9597303d913e32d3954954ba1c8123731d503d1653a0d848856812d2ee6951efe06b1db2b91a50e5d54098f60c26f36bc8390203f4c8a2d8

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

    Filesize

    1KB

    MD5

    cc6cfea44f94d487d302fe97587a055e

    SHA1

    557162e994c02df41a16f0aec6ae9b6dab3ac9eb

    SHA256

    7569944335801a4a9ad619291599faab03d1f1e6915042b32c7c80aa49803fe3

    SHA512

    9a19216612bd0724d7f7d346966699766ac09e2480239d8af2036f6239c248c9df4b45d8b57c64e4016d1eb8b9e20fe0f45fb09cad37a96668db5ddefbf58ee6

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

    Filesize

    1KB

    MD5

    ca0218dc9bb7a6c57f1146cb00a682ad

    SHA1

    734607b8f61c7bcf2a7b1b11b2ebc18cbb2bdbac

    SHA256

    cba7dd41f32c56e99a28e51fff55943c1b1fd3d52310bf3af4c7d65fc335d7f5

    SHA512

    a50dc75d81f5ce246eed3e4303ac935988c37abac3b9f6bf1eedc2faeedb297178542fd2cc07082482d153ff535995fd71377d73d7502c80fb7418a61ecc32bf

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

    Filesize

    1KB

    MD5

    c8c29f1f588816cb69fcebf642891720

    SHA1

    968d91f771b5e235c91952025509479c4456b44e

    SHA256

    2e1d2b0a86abe46d40843dbc522f6c9891671b21c1ac61e21d32f7245a93eb8b

    SHA512

    6b19696757654762ec551388c04142d4404892314c3e8a811b3260834dd6110b57be9aa4a0497ff579a4936c91cbdfbf7a938f676ee24e7476ecdd1b668cac3a

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pr0kudrq.lgx.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\is-7HQ1T.tmp\_isetup\_shfoldr.dll

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • C:\Users\Admin\AppData\Local\Temp\is-J81TC.tmp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp

    Filesize

    1.2MB

    MD5

    70fcedd0d46d1c97af8e3eb4868c5bf1

    SHA1

    42ae1e3080be4720fc1bb97ef63d59f2f26e1558

    SHA256

    fcae74ccb09740303d86a88dd07db209721458e8eb48697f1c7d666a67dd5a07

    SHA512

    2cc42882fbdcd3d8bc4c3caa2116b76bd65fccff35e6058cfe67a80a307251b77bcbf17ddbd51e9d566f6810ac95ea33848da2a733cab6135d399dfaaf0c1020

  • C:\Users\Admin\AppData\Local\Temp\is-UO99C.tmp\_isetup\_isdecmp.dll

    Filesize

    13KB

    MD5

    a813d18268affd4763dde940246dc7e5

    SHA1

    c7366e1fd925c17cc6068001bd38eaef5b42852f

    SHA256

    e19781aabe466dd8779cb9c8fa41bbb73375447066bb34e876cf388a6ed63c64

    SHA512

    b310ed4cd2e94381c00a6a370fcb7cc867ebe425d705b69caaaaffdafbab91f72d357966916053e72e68ecf712f2af7585500c58bb53ec3e1d539179fcb45fb4

  • C:\Users\Admin\AppData\Roaming\d3d9_4.drv

    Filesize

    4.2MB

    MD5

    707e9a2445ea22ce1bfafbad0583c1d4

    SHA1

    73918fb8eb7b21c2d6bb27f9ce48c23c92bef006

    SHA256

    3455e2e96cd0a23323da81a2bcf9566200de523f1d1d85efe27f55ed2add9e8b

    SHA512

    77485310a94451eb2246caf0cb03743facde00a7531eaea32725782f39b5b84739b71f203668b96f3e9e5ebee088fc0283406e9129ed27694cf9b8e67bbbbe66

  • memory/216-57-0x000001D1729C0000-0x000001D1729E2000-memory.dmp

    Filesize

    136KB

  • memory/1328-85-0x000000001CDB0000-0x000000001CE62000-memory.dmp

    Filesize

    712KB

  • memory/1328-84-0x000000001BCE0000-0x000000001BD30000-memory.dmp

    Filesize

    320KB

  • memory/1328-83-0x000000001BD50000-0x000000001C074000-memory.dmp

    Filesize

    3.1MB

  • memory/1328-86-0x00007FFBC4E20000-0x00007FFBC526C000-memory.dmp

    Filesize

    4.3MB

  • memory/2680-123-0x00007FFBC4E20000-0x00007FFBC526C000-memory.dmp

    Filesize

    4.3MB

  • memory/2780-27-0x0000000000400000-0x0000000000446000-memory.dmp

    Filesize

    280KB

  • memory/2780-2-0x0000000000401000-0x0000000000417000-memory.dmp

    Filesize

    88KB

  • memory/2780-0-0x0000000000400000-0x0000000000446000-memory.dmp

    Filesize

    280KB

  • memory/2948-51-0x0000000000400000-0x0000000000541000-memory.dmp

    Filesize

    1.3MB

  • memory/2948-34-0x0000000000400000-0x0000000000541000-memory.dmp

    Filesize

    1.3MB

  • memory/3024-23-0x0000000000400000-0x0000000000446000-memory.dmp

    Filesize

    280KB

  • memory/3024-53-0x0000000000400000-0x0000000000446000-memory.dmp

    Filesize

    280KB

  • memory/3024-21-0x0000000000400000-0x0000000000446000-memory.dmp

    Filesize

    280KB

  • memory/3056-25-0x0000000000400000-0x0000000000541000-memory.dmp

    Filesize

    1.3MB

  • memory/3056-7-0x0000000000400000-0x0000000000541000-memory.dmp

    Filesize

    1.3MB

  • memory/4624-104-0x00007FFBC4E20000-0x00007FFBC526C000-memory.dmp

    Filesize

    4.3MB