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
    04-12-2024 02:01

General

  • Target

    01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2.exe

  • Size

    3.7MB

  • MD5

    15f259b30ec72a5217144834f7f5b564

  • SHA1

    baed3fe7d059a497f856e263431ccd3872ef1ea1

  • SHA256

    01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2

  • SHA512

    5e1148a9cf8008b7c38d067ec34e5c3bc7255341d114476532f8111ea2c3e654eb70b0a439aaaea22543576f09b9cec269f9b3414a6a24fc54b89c7c677c5f47

  • SSDEEP

    98304:ZrAsTIZbqqBQjwske/pCT66UNYekeWY0CE9:ZcCSL0ke/pO5ekeWtCE9

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

DAVID

C2

hoffmann3.ydns.eu:5829

Mutex

532aca2b-96ff-44aa-9213-031e975919ac

Attributes
  • encryption_key

    C5B555A83D127A9553D4FB1FCECB35CE8E91A447

  • install_name

    outlooks.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Outlooks

  • subdirectory

    WindowsUpdates

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 2 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 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 43 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2.exe
    "C:\Users\Admin\AppData\Local\Temp\01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3144
    • 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\01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4236
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\eNuXmIwkixzW.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3864
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eNuXmIwkixzW" /XML "C:\Users\Admin\AppData\Local\Temp\tmp388F.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:4868
    • C:\Users\Admin\AppData\Local\Temp\01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2.exe
      "C:\Users\Admin\AppData\Local\Temp\01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2428
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Outlooks" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe" /rl HIGHEST /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:3768
      • C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
        "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1120
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:5056
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\eNuXmIwkixzW.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:60
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eNuXmIwkixzW" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8E12.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:2348
        • C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
          "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:900
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks" /create /tn "Outlooks" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe" /rl HIGHEST /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:4588

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2.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

    5c18a499b551f28025a154ac4113d0a5

    SHA1

    3cbace79a4093f58bfe50240be814dda2da2dbac

    SHA256

    371168a52ec7839ae89bec50e6b0da6966a7d291471319dacca0fefb0a1f320a

    SHA512

    630b083f75c3365722067704c2b01bdd50e28d6e8870636f892935fc7954062fef52559732673f98b0b96d918768428ab4ff9f00f276f8281eacd9d7bf78bdbc

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

    Filesize

    18KB

    MD5

    67f73504632195050fa20981dbefd817

    SHA1

    1d28195d52c3744f58cdff3dd6372af80f64727f

    SHA256

    db2fc624d45c833e3a0239446370f6ae5410201335e95abd368bc2caabdcc03e

    SHA512

    8f5623245470162a6a8720d1d58eb7fe9ea060944a5274fbf535e67b7281b7a9c85b5906c0c19a70571f336b17eea44964a9732998e98deab1ba48e7555fabca

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rhox1m5d.31c.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmp388F.tmp

    Filesize

    1KB

    MD5

    ae3c8d11a351dbd0c687cbf0ffd33a99

    SHA1

    355275479a26b281211f1a1ca372059d3720cea8

    SHA256

    1c359ff00bc2f2491746d35ecc273b1ae9f18d73d76f5cf624240dcda59c9979

    SHA512

    d6a3af03de6534b8ebbf7f48e1da646ec01c7bf4a20c98bc89f883c3a91cfcbfee986153f18dbcd9f3055ebf7cb03a71bbe0c7f52ff133e43d0d9666ce39c5a7

  • C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe

    Filesize

    3.7MB

    MD5

    15f259b30ec72a5217144834f7f5b564

    SHA1

    baed3fe7d059a497f856e263431ccd3872ef1ea1

    SHA256

    01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2

    SHA512

    5e1148a9cf8008b7c38d067ec34e5c3bc7255341d114476532f8111ea2c3e654eb70b0a439aaaea22543576f09b9cec269f9b3414a6a24fc54b89c7c677c5f47

  • memory/60-132-0x0000000075AD0000-0x0000000075B1C000-memory.dmp

    Filesize

    304KB

  • memory/900-153-0x0000000006CA0000-0x0000000006CB2000-memory.dmp

    Filesize

    72KB

  • memory/900-146-0x0000000006AA0000-0x0000000006B52000-memory.dmp

    Filesize

    712KB

  • memory/900-154-0x0000000007FA0000-0x0000000007FDC000-memory.dmp

    Filesize

    240KB

  • memory/900-144-0x0000000006CC0000-0x00000000072D8000-memory.dmp

    Filesize

    6.1MB

  • memory/900-145-0x0000000006830000-0x0000000006880000-memory.dmp

    Filesize

    320KB

  • memory/2428-45-0x0000000000400000-0x0000000000724000-memory.dmp

    Filesize

    3.1MB

  • memory/3144-7-0x000000007524E000-0x000000007524F000-memory.dmp

    Filesize

    4KB

  • memory/3144-8-0x0000000075240000-0x00000000759F0000-memory.dmp

    Filesize

    7.7MB

  • memory/3144-49-0x0000000075240000-0x00000000759F0000-memory.dmp

    Filesize

    7.7MB

  • memory/3144-9-0x0000000006940000-0x0000000006CA8000-memory.dmp

    Filesize

    3.4MB

  • memory/3144-6-0x0000000007DA0000-0x0000000007DB8000-memory.dmp

    Filesize

    96KB

  • memory/3144-4-0x00000000031B0000-0x00000000031BA000-memory.dmp

    Filesize

    40KB

  • memory/3144-5-0x0000000075240000-0x00000000759F0000-memory.dmp

    Filesize

    7.7MB

  • memory/3144-0-0x000000007524E000-0x000000007524F000-memory.dmp

    Filesize

    4KB

  • memory/3144-3-0x0000000007C70000-0x0000000007D02000-memory.dmp

    Filesize

    584KB

  • memory/3144-2-0x0000000008140000-0x00000000086E4000-memory.dmp

    Filesize

    5.6MB

  • memory/3144-10-0x0000000007200000-0x000000000729C000-memory.dmp

    Filesize

    624KB

  • memory/3144-1-0x0000000000A00000-0x0000000000DAC000-memory.dmp

    Filesize

    3.7MB

  • memory/3864-57-0x0000000070220000-0x000000007026C000-memory.dmp

    Filesize

    304KB

  • memory/3864-23-0x0000000075240000-0x00000000759F0000-memory.dmp

    Filesize

    7.7MB

  • memory/3864-46-0x00000000062A0000-0x00000000062BE000-memory.dmp

    Filesize

    120KB

  • memory/3864-19-0x0000000075240000-0x00000000759F0000-memory.dmp

    Filesize

    7.7MB

  • memory/3864-21-0x0000000075240000-0x00000000759F0000-memory.dmp

    Filesize

    7.7MB

  • memory/3864-67-0x0000000006850000-0x000000000686E000-memory.dmp

    Filesize

    120KB

  • memory/3864-68-0x00000000074A0000-0x0000000007543000-memory.dmp

    Filesize

    652KB

  • memory/3864-48-0x0000000006630000-0x000000000667C000-memory.dmp

    Filesize

    304KB

  • memory/3864-56-0x0000000007260000-0x0000000007292000-memory.dmp

    Filesize

    200KB

  • memory/3864-79-0x0000000007C10000-0x000000000828A000-memory.dmp

    Filesize

    6.5MB

  • memory/3864-80-0x00000000075C0000-0x00000000075DA000-memory.dmp

    Filesize

    104KB

  • memory/3864-81-0x0000000007630000-0x000000000763A000-memory.dmp

    Filesize

    40KB

  • memory/3864-82-0x0000000007840000-0x00000000078D6000-memory.dmp

    Filesize

    600KB

  • memory/3864-83-0x00000000077C0000-0x00000000077D1000-memory.dmp

    Filesize

    68KB

  • memory/3864-84-0x00000000077F0000-0x00000000077FE000-memory.dmp

    Filesize

    56KB

  • memory/3864-85-0x0000000007800000-0x0000000007814000-memory.dmp

    Filesize

    80KB

  • memory/3864-94-0x0000000075240000-0x00000000759F0000-memory.dmp

    Filesize

    7.7MB

  • memory/4236-69-0x0000000070220000-0x000000007026C000-memory.dmp

    Filesize

    304KB

  • memory/4236-18-0x0000000075240000-0x00000000759F0000-memory.dmp

    Filesize

    7.7MB

  • memory/4236-87-0x0000000007E50000-0x0000000007E58000-memory.dmp

    Filesize

    32KB

  • memory/4236-16-0x0000000075240000-0x00000000759F0000-memory.dmp

    Filesize

    7.7MB

  • memory/4236-24-0x0000000006120000-0x0000000006186000-memory.dmp

    Filesize

    408KB

  • memory/4236-17-0x0000000005960000-0x0000000005F88000-memory.dmp

    Filesize

    6.2MB

  • memory/4236-25-0x0000000006190000-0x00000000061F6000-memory.dmp

    Filesize

    408KB

  • memory/4236-22-0x0000000006080000-0x00000000060A2000-memory.dmp

    Filesize

    136KB

  • memory/4236-15-0x0000000005270000-0x00000000052A6000-memory.dmp

    Filesize

    216KB

  • memory/4236-86-0x0000000007E70000-0x0000000007E8A000-memory.dmp

    Filesize

    104KB

  • memory/4236-93-0x0000000075240000-0x00000000759F0000-memory.dmp

    Filesize

    7.7MB

  • memory/4236-26-0x0000000006200000-0x0000000006554000-memory.dmp

    Filesize

    3.3MB

  • memory/5056-122-0x0000000075AD0000-0x0000000075B1C000-memory.dmp

    Filesize

    304KB

  • memory/5056-121-0x0000000005FF0000-0x000000000603C000-memory.dmp

    Filesize

    304KB

  • memory/5056-147-0x0000000007540000-0x0000000007554000-memory.dmp

    Filesize

    80KB

  • memory/5056-97-0x0000000005900000-0x0000000005C54000-memory.dmp

    Filesize

    3.3MB

  • memory/5056-143-0x0000000007510000-0x0000000007521000-memory.dmp

    Filesize

    68KB

  • memory/5056-133-0x0000000006FA0000-0x0000000007043000-memory.dmp

    Filesize

    652KB