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Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/12/2024, 15:30

General

  • Target

    5ee53e7e25a03aff5a92dd99804ecc38795f7513437e82be670b9e0b61a98ea4.exe

  • Size

    3.2MB

  • MD5

    3dc1d39a2ebeb5dc85da7e8c3d6e3aaa

  • SHA1

    4cfcddc23cc0949ca620474edef6c82a2c2280d3

  • SHA256

    5ee53e7e25a03aff5a92dd99804ecc38795f7513437e82be670b9e0b61a98ea4

  • SHA512

    77dfdb50b408c3e88a18b0aae3eac9e2001f6041b406aef2d298e35cf49b51d921afeb5526930a44dc4e12294cd31c3f9fed74871c8bb0e9989e6a912131a65a

  • SSDEEP

    49152:tkvXI22SsaNYfdPBldt698dBcjHIGRJ6ybR3LoGdJTHHB72eh2NTC:OvY22SsaNYfdPBldt6+dBcjHIGRJ6sZ

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

hacked-fud1

C2

192.168.100.10:1412

Mutex

a685d3ed-d174-40b7-9655-c2bfab3ed130

Attributes
  • encryption_key

    2A5F3DAC380078962166175BD172DE2D4AA07E26

  • install_name

    fud2.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Microsoft Service

  • subdirectory

    SubDir

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 3 IoCs
  • Executes dropped EXE 8 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Drops file in System32 directory 5 IoCs
  • Drops file in Windows directory 5 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 8 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 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 16 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\5ee53e7e25a03aff5a92dd99804ecc38795f7513437e82be670b9e0b61a98ea4.exe
    "C:\Users\Admin\AppData\Local\Temp\5ee53e7e25a03aff5a92dd99804ecc38795f7513437e82be670b9e0b61a98ea4.exe"
    1⤵
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4264
    • \??\c:\users\admin\appdata\local\temp\5ee53e7e25a03aff5a92dd99804ecc38795f7513437e82be670b9e0b61a98ea4.exe 
      c:\users\admin\appdata\local\temp\5ee53e7e25a03aff5a92dd99804ecc38795f7513437e82be670b9e0b61a98ea4.exe 
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4468
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Microsoft Service" /sc ONLOGON /tr "C:\Windows\system32\SubDir\fud2.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2108
      • C:\Windows\system32\SubDir\fud2.exe
        "C:\Windows\system32\SubDir\fud2.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:32
        • \??\c:\windows\resources\themes\explorer.exe
          c:\windows\resources\themes\explorer.exe
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:3108
    • C:\Windows\Resources\Themes\icsys.icn.exe
      C:\Windows\Resources\Themes\icsys.icn.exe
      2⤵
      • Executes dropped EXE
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1260
      • \??\c:\windows\resources\themes\explorer.exe
        c:\windows\resources\themes\explorer.exe
        3⤵
        • Modifies visiblity of hidden/system files in Explorer
        • Executes dropped EXE
        • Adds Run key to start application
        • Drops file in System32 directory
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1020
        • \??\c:\windows\resources\spoolsv.exe
          c:\windows\resources\spoolsv.exe SE
          4⤵
          • Executes dropped EXE
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4416
          • \??\c:\windows\resources\svchost.exe
            c:\windows\resources\svchost.exe
            5⤵
            • Modifies visiblity of hidden/system files in Explorer
            • Executes dropped EXE
            • Adds Run key to start application
            • Drops file in System32 directory
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:1284
            • \??\c:\windows\resources\spoolsv.exe
              c:\windows\resources\spoolsv.exe PR
              6⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious use of SetWindowsHookEx
              PID:4196

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\5ee53e7e25a03aff5a92dd99804ecc38795f7513437e82be670b9e0b61a98ea4.exe 

    Filesize

    3.1MB

    MD5

    f2fde7b36d929112d10c35f88597e643

    SHA1

    ecfb40c3f75cbabf3787d7cc466f4ab3e0bfb59a

    SHA256

    2a1b24e284eb329bcac58cfe90ef04e390aef10f4c0cc4eddf6077d113e5e591

    SHA512

    99dda7073d391e3ada814df8bad4f3e817adb2d274e005cedcf378d2031a3695ddd8afeecfa8ceacf9569f400b08f1dc357d4d90d72b9ba0372f267668f399df

  • C:\Windows\Resources\Themes\explorer.exe

    Filesize

    135KB

    MD5

    be6a948cee3d2ad35e246fca7d9d9937

    SHA1

    553b33fbaa73d71a13fdb8900171fb1f0dcc1de7

    SHA256

    92b1088df4de47f88b0cf3f73d961de13d0c7e307a4db07a9067cd0ce3441264

    SHA512

    05a09a2f447751898f72c08b93457a8a182cc5be2ec7711f87ac71a61855335836406f4970c8b50ad7aa7a13099cf0b74156ee74efd9ea2f4a9c7ce28689a3d0

  • C:\Windows\Resources\Themes\icsys.icn.exe

    Filesize

    135KB

    MD5

    dba332c1832b99f7c7d078a0082874ed

    SHA1

    f339233684c867e70ec06f09cae6f938ba7f6dd0

    SHA256

    d14ca80e7ae57bfa56b7614372feb89b5c35397451dd2c38156558b3a577c397

    SHA512

    410746bd8242436f4c8ea8700f9e4dd93270aab3dd494e539b877fcbefc76a5e9111e4de720ba3daeb21722ce568adffa347407b798fc8e87e8fa8b5b7b42482

  • C:\Windows\Resources\spoolsv.exe

    Filesize

    135KB

    MD5

    315558f2466c66af0fe4b4e58a0415db

    SHA1

    1d48fa871a55da9fc78e9f9198a3bb13b932ea1a

    SHA256

    e540e66d7e47e456dbe0ebe9e4eac7ebf8bb2ffa8e20ffbad414e8d4c01f7800

    SHA512

    50e8348eb1a364b5b8d439b5220304ce5f3438ae1249eb1400bc6cc7bb380b08c9f575e317ed205dd7902680692ec4d91bd37c4cd57d699ccda9d7453bccee32

  • C:\Windows\System32\SubDir\fud2.exe

    Filesize

    3.2MB

    MD5

    3dc1d39a2ebeb5dc85da7e8c3d6e3aaa

    SHA1

    4cfcddc23cc0949ca620474edef6c82a2c2280d3

    SHA256

    5ee53e7e25a03aff5a92dd99804ecc38795f7513437e82be670b9e0b61a98ea4

    SHA512

    77dfdb50b408c3e88a18b0aae3eac9e2001f6041b406aef2d298e35cf49b51d921afeb5526930a44dc4e12294cd31c3f9fed74871c8bb0e9989e6a912131a65a

  • \??\c:\windows\resources\svchost.exe

    Filesize

    135KB

    MD5

    d29573cbf2a0fa4ee58564f2a36aea8c

    SHA1

    85daa52ba6cc4fea125a4ae0255964ffdc933e7c

    SHA256

    39496ffe3a4f6bf9f35e12fa06db0511bd0db095cdf1af6f23f2718535f14299

    SHA512

    5c0a6378cf8e5b383708b11541c1983908bc1ea784ce38581114e383a545dc229c598c4b0b83404c2ea22d60115b766060db773d68f14480848fd7304cd9cabb

  • memory/32-57-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/1020-67-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/1260-16-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/1260-64-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/1284-68-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/3108-55-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/4196-62-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/4264-65-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/4264-0-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/4416-42-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/4416-63-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/4468-11-0x00007FF868440000-0x00007FF868F01000-memory.dmp

    Filesize

    10.8MB

  • memory/4468-66-0x00007FF868440000-0x00007FF868F01000-memory.dmp

    Filesize

    10.8MB

  • memory/4468-10-0x0000000000350000-0x0000000000674000-memory.dmp

    Filesize

    3.1MB

  • memory/4468-9-0x00007FF868443000-0x00007FF868445000-memory.dmp

    Filesize

    8KB