Analysis

  • max time kernel
    152s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-10-2022 10:11

General

  • Target

    3HkvftGZK9KZ.exe

  • Size

    1.3MB

  • MD5

    6ef27bb17948bf2cd5f17d32506ab25f

  • SHA1

    1cace02f54cb1696be68e2ee291e26c051293a51

  • SHA256

    4a412162a0b00623211b7303bc18b00b76d196ea8343a2c35abc262e9e97c9b2

  • SHA512

    38d33e4f1d445ddbb5a45be34f369e60b22f5c29733e3acec9b156851e8494cd5845d22b2c71794b51c2ae73a890685f35dc1738c0e706f8b93c2272545885de

  • SSDEEP

    24576:0KWHORcD/gtB49yDx553XTWcdjrFY5des+Lpq1qe9UdaRkss0:MHMRBO4TxXTLtLpqjOd+kss

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Office04

C2

173.225.115.99:7702

Mutex

ecce8627-6b34-425d-8f0e-3a8923c66220

Attributes
  • encryption_key

    F04A75E6507173FAEEC2BB82C564030A5E8413FF

  • install_name

    ser.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    quar

Extracted

Family

limerat

Attributes
  • aes_key

    082808

  • antivm

    true

  • c2_url

    https://pastebin.com/raw/Mh8T0LJe

  • delay

    6

  • download_payload

    false

  • install

    true

  • install_name

    limo.exe

  • main_folder

    Temp

  • payload_url

    https://mdl.arabou.edu.kw/ksa/user/profile/field/text/lang/en/VB64.exe

  • pin_spread

    true

  • sub_folder

    \Windows\

  • usb_spread

    true

Signatures

  • LimeRAT

    Simple yet powerful RAT for Windows machines written in .NET.

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 5 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 10 IoCs
  • Checks computer location settings 2 TTPs 6 IoCs

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

  • Drops startup file 2 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 4 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of FindShellTrayWindow 6 IoCs
  • Suspicious use of SendNotifyMessage 4 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3HkvftGZK9KZ.exe
    "C:\Users\Admin\AppData\Local\Temp\3HkvftGZK9KZ.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3792
    • C:\Users\Admin\AppData\Local\Temp\fend.exe
      "C:\Users\Admin\AppData\Local\Temp\fend.exe"
      2⤵
      • Executes dropped EXE
      PID:1624
    • C:\Users\Admin\AppData\Local\Temp\gate.exe
      "C:\Users\Admin\AppData\Local\Temp\gate.exe"
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:2748
      • C:\Users\Admin\AppData\Roaming\b52gate\b52gate.exe
        "C:\Users\Admin\AppData\Roaming\b52gate\b52gate.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Drops startup file
        • Adds Run key to start application
        • Checks processor information in registry
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of WriteProcessMemory
        PID:1616
        • C:\Users\Admin\AppData\Local\Temp\sysinf.exe
          "C:\Users\Admin\AppData\Local\Temp\sysinf.exe"
          4⤵
          • Executes dropped EXE
          PID:1124
    • C:\Users\Admin\AppData\Local\Temp\VB64.exe
      "C:\Users\Admin\AppData\Local\Temp\VB64.exe"
      2⤵
      • Executes dropped EXE
      PID:2340
    • C:\Users\Admin\AppData\Local\Temp\qua.exe
      "C:\Users\Admin\AppData\Local\Temp\qua.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4848
      • C:\Users\Admin\AppData\Roaming\quar\ser.exe
        "C:\Users\Admin\AppData\Roaming\quar\ser.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of WriteProcessMemory
        PID:1284
        • C:\Users\Admin\AppData\Local\Temp\B72PweJ9Vbnr.exe
          "C:\Users\Admin\AppData\Local\Temp\B72PweJ9Vbnr.exe"
          4⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Suspicious use of WriteProcessMemory
          PID:2224
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Local\Temp\Windows\limo.exe'"
            5⤵
            • Creates scheduled task(s)
            PID:2732
          • C:\Users\Admin\AppData\Local\Temp\Windows\limo.exe
            "C:\Users\Admin\AppData\Local\Temp\Windows\limo.exe"
            5⤵
            • Executes dropped EXE
            • Checks computer location settings
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1684
            • C:\Users\Admin\AppData\Local\Temp\tmp1596.tmpVB64.exe
              "C:\Users\Admin\AppData\Local\Temp\tmp1596.tmpVB64.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:2888

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\B72PweJ9Vbnr.exe

    Filesize

    28KB

    MD5

    3ed009fe337a7081b5d8b6ab558779ea

    SHA1

    0fab458919e434f2ee62d4513521bb795fa4a6a3

    SHA256

    241612ebc1cb84fa0f2bd663718f35ca9e07f2ff2640ffe113afe3cecb9bd2bd

    SHA512

    511cb5dabca9ace7c369e77510428a7144824a53894af42cba04ada12884228a14747f1b4e87ed6aa10d0101ee90567c3c873fd33c8450f8ccc3892b4cf669ea

  • C:\Users\Admin\AppData\Local\Temp\B72PweJ9Vbnr.exe

    Filesize

    28KB

    MD5

    3ed009fe337a7081b5d8b6ab558779ea

    SHA1

    0fab458919e434f2ee62d4513521bb795fa4a6a3

    SHA256

    241612ebc1cb84fa0f2bd663718f35ca9e07f2ff2640ffe113afe3cecb9bd2bd

    SHA512

    511cb5dabca9ace7c369e77510428a7144824a53894af42cba04ada12884228a14747f1b4e87ed6aa10d0101ee90567c3c873fd33c8450f8ccc3892b4cf669ea

  • C:\Users\Admin\AppData\Local\Temp\VB64.exe

    Filesize

    55KB

    MD5

    0dbad8bd336bf6e2bec7a323a1162c7b

    SHA1

    adb907702c963f8aa7e2580a93a89f62139cc013

    SHA256

    09faa0f38dbbb5dfb4a821fb88589727f4410ede321a5e2858c1edaee538a047

    SHA512

    b1524f3d41e4237bf454d0da437fef4945e1484d884f06dd251c9725fc48469c96e1f620889b6e3b38b361b6c25d84a05ad5e362a86274acd39d044f9183c91b

  • C:\Users\Admin\AppData\Local\Temp\VB64.exe

    Filesize

    55KB

    MD5

    0dbad8bd336bf6e2bec7a323a1162c7b

    SHA1

    adb907702c963f8aa7e2580a93a89f62139cc013

    SHA256

    09faa0f38dbbb5dfb4a821fb88589727f4410ede321a5e2858c1edaee538a047

    SHA512

    b1524f3d41e4237bf454d0da437fef4945e1484d884f06dd251c9725fc48469c96e1f620889b6e3b38b361b6c25d84a05ad5e362a86274acd39d044f9183c91b

  • C:\Users\Admin\AppData\Local\Temp\Windows\limo.exe

    Filesize

    28KB

    MD5

    3ed009fe337a7081b5d8b6ab558779ea

    SHA1

    0fab458919e434f2ee62d4513521bb795fa4a6a3

    SHA256

    241612ebc1cb84fa0f2bd663718f35ca9e07f2ff2640ffe113afe3cecb9bd2bd

    SHA512

    511cb5dabca9ace7c369e77510428a7144824a53894af42cba04ada12884228a14747f1b4e87ed6aa10d0101ee90567c3c873fd33c8450f8ccc3892b4cf669ea

  • C:\Users\Admin\AppData\Local\Temp\Windows\limo.exe

    Filesize

    28KB

    MD5

    3ed009fe337a7081b5d8b6ab558779ea

    SHA1

    0fab458919e434f2ee62d4513521bb795fa4a6a3

    SHA256

    241612ebc1cb84fa0f2bd663718f35ca9e07f2ff2640ffe113afe3cecb9bd2bd

    SHA512

    511cb5dabca9ace7c369e77510428a7144824a53894af42cba04ada12884228a14747f1b4e87ed6aa10d0101ee90567c3c873fd33c8450f8ccc3892b4cf669ea

  • C:\Users\Admin\AppData\Local\Temp\fend.exe

    Filesize

    14KB

    MD5

    db7180315606402c98b528205c4f5168

    SHA1

    7b7c070eb123622d56d43b0ffff6547bc0d5d09a

    SHA256

    824d880eb5ecfe7e0d74b59957748af9603e293f32f2b2466d1c76347dfcaa78

    SHA512

    e4edae6b0d5dfedf9ac0c8cb65155267a6bfaa108a23be61d372cc968f50f595f577ef6fd862165989939215001bb73e5057bfd39f72a328ff8d34b98bbf76ab

  • C:\Users\Admin\AppData\Local\Temp\fend.exe

    Filesize

    14KB

    MD5

    db7180315606402c98b528205c4f5168

    SHA1

    7b7c070eb123622d56d43b0ffff6547bc0d5d09a

    SHA256

    824d880eb5ecfe7e0d74b59957748af9603e293f32f2b2466d1c76347dfcaa78

    SHA512

    e4edae6b0d5dfedf9ac0c8cb65155267a6bfaa108a23be61d372cc968f50f595f577ef6fd862165989939215001bb73e5057bfd39f72a328ff8d34b98bbf76ab

  • C:\Users\Admin\AppData\Local\Temp\gate.exe

    Filesize

    95KB

    MD5

    f2c20580687d5e95b9c7226390115e76

    SHA1

    7e61b259c635fdc4b4c3fb42a72b9182f556743b

    SHA256

    5d91b008b2dbb987d22919f46a42811fd0a0d9c44e3e89f2cd771937daf147dd

    SHA512

    a7bb282d5b8036ffa34aae9cd6f9d50e04879307966e5fde3831b334f436423777bf7ab9cd7c25dd88ede8be36cce10f3dd128e107ed3217ccd954ea1b3f7129

  • C:\Users\Admin\AppData\Local\Temp\gate.exe

    Filesize

    95KB

    MD5

    f2c20580687d5e95b9c7226390115e76

    SHA1

    7e61b259c635fdc4b4c3fb42a72b9182f556743b

    SHA256

    5d91b008b2dbb987d22919f46a42811fd0a0d9c44e3e89f2cd771937daf147dd

    SHA512

    a7bb282d5b8036ffa34aae9cd6f9d50e04879307966e5fde3831b334f436423777bf7ab9cd7c25dd88ede8be36cce10f3dd128e107ed3217ccd954ea1b3f7129

  • C:\Users\Admin\AppData\Local\Temp\qua.exe

    Filesize

    502KB

    MD5

    94735a9ba9ccfd4df241558b39a1c897

    SHA1

    e35aee5b3bf2762fb28f30867dc7ef6c0c7abcc6

    SHA256

    f55f318a58f3229681697e3405142697fa925455222a5a1f272fd34e9c84e314

    SHA512

    0cb13d79a6946e3224d98157e3d4cd1f6eacd6a55e2b47e7a9db88ff11a54559ddf1f0ffefd78ab497bc08038a96afed47da418563c3de77921e49207a88d16a

  • C:\Users\Admin\AppData\Local\Temp\qua.exe

    Filesize

    502KB

    MD5

    94735a9ba9ccfd4df241558b39a1c897

    SHA1

    e35aee5b3bf2762fb28f30867dc7ef6c0c7abcc6

    SHA256

    f55f318a58f3229681697e3405142697fa925455222a5a1f272fd34e9c84e314

    SHA512

    0cb13d79a6946e3224d98157e3d4cd1f6eacd6a55e2b47e7a9db88ff11a54559ddf1f0ffefd78ab497bc08038a96afed47da418563c3de77921e49207a88d16a

  • C:\Users\Admin\AppData\Local\Temp\sysinf.exe

    Filesize

    28KB

    MD5

    3ed009fe337a7081b5d8b6ab558779ea

    SHA1

    0fab458919e434f2ee62d4513521bb795fa4a6a3

    SHA256

    241612ebc1cb84fa0f2bd663718f35ca9e07f2ff2640ffe113afe3cecb9bd2bd

    SHA512

    511cb5dabca9ace7c369e77510428a7144824a53894af42cba04ada12884228a14747f1b4e87ed6aa10d0101ee90567c3c873fd33c8450f8ccc3892b4cf669ea

  • C:\Users\Admin\AppData\Local\Temp\sysinf.exe

    Filesize

    28KB

    MD5

    3ed009fe337a7081b5d8b6ab558779ea

    SHA1

    0fab458919e434f2ee62d4513521bb795fa4a6a3

    SHA256

    241612ebc1cb84fa0f2bd663718f35ca9e07f2ff2640ffe113afe3cecb9bd2bd

    SHA512

    511cb5dabca9ace7c369e77510428a7144824a53894af42cba04ada12884228a14747f1b4e87ed6aa10d0101ee90567c3c873fd33c8450f8ccc3892b4cf669ea

  • C:\Users\Admin\AppData\Local\Temp\tmp1596.tmpVB64.exe

    Filesize

    55KB

    MD5

    0dbad8bd336bf6e2bec7a323a1162c7b

    SHA1

    adb907702c963f8aa7e2580a93a89f62139cc013

    SHA256

    09faa0f38dbbb5dfb4a821fb88589727f4410ede321a5e2858c1edaee538a047

    SHA512

    b1524f3d41e4237bf454d0da437fef4945e1484d884f06dd251c9725fc48469c96e1f620889b6e3b38b361b6c25d84a05ad5e362a86274acd39d044f9183c91b

  • C:\Users\Admin\AppData\Local\Temp\tmp1596.tmpVB64.exe

    Filesize

    55KB

    MD5

    0dbad8bd336bf6e2bec7a323a1162c7b

    SHA1

    adb907702c963f8aa7e2580a93a89f62139cc013

    SHA256

    09faa0f38dbbb5dfb4a821fb88589727f4410ede321a5e2858c1edaee538a047

    SHA512

    b1524f3d41e4237bf454d0da437fef4945e1484d884f06dd251c9725fc48469c96e1f620889b6e3b38b361b6c25d84a05ad5e362a86274acd39d044f9183c91b

  • C:\Users\Admin\AppData\Roaming\b52gate\b52gate.exe

    Filesize

    95KB

    MD5

    f2c20580687d5e95b9c7226390115e76

    SHA1

    7e61b259c635fdc4b4c3fb42a72b9182f556743b

    SHA256

    5d91b008b2dbb987d22919f46a42811fd0a0d9c44e3e89f2cd771937daf147dd

    SHA512

    a7bb282d5b8036ffa34aae9cd6f9d50e04879307966e5fde3831b334f436423777bf7ab9cd7c25dd88ede8be36cce10f3dd128e107ed3217ccd954ea1b3f7129

  • C:\Users\Admin\AppData\Roaming\b52gate\b52gate.exe

    Filesize

    95KB

    MD5

    f2c20580687d5e95b9c7226390115e76

    SHA1

    7e61b259c635fdc4b4c3fb42a72b9182f556743b

    SHA256

    5d91b008b2dbb987d22919f46a42811fd0a0d9c44e3e89f2cd771937daf147dd

    SHA512

    a7bb282d5b8036ffa34aae9cd6f9d50e04879307966e5fde3831b334f436423777bf7ab9cd7c25dd88ede8be36cce10f3dd128e107ed3217ccd954ea1b3f7129

  • C:\Users\Admin\AppData\Roaming\quar\ser.exe

    Filesize

    502KB

    MD5

    94735a9ba9ccfd4df241558b39a1c897

    SHA1

    e35aee5b3bf2762fb28f30867dc7ef6c0c7abcc6

    SHA256

    f55f318a58f3229681697e3405142697fa925455222a5a1f272fd34e9c84e314

    SHA512

    0cb13d79a6946e3224d98157e3d4cd1f6eacd6a55e2b47e7a9db88ff11a54559ddf1f0ffefd78ab497bc08038a96afed47da418563c3de77921e49207a88d16a

  • C:\Users\Admin\AppData\Roaming\quar\ser.exe

    Filesize

    502KB

    MD5

    94735a9ba9ccfd4df241558b39a1c897

    SHA1

    e35aee5b3bf2762fb28f30867dc7ef6c0c7abcc6

    SHA256

    f55f318a58f3229681697e3405142697fa925455222a5a1f272fd34e9c84e314

    SHA512

    0cb13d79a6946e3224d98157e3d4cd1f6eacd6a55e2b47e7a9db88ff11a54559ddf1f0ffefd78ab497bc08038a96afed47da418563c3de77921e49207a88d16a

  • memory/1284-169-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp

    Filesize

    10.8MB

  • memory/1284-160-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp

    Filesize

    10.8MB

  • memory/1284-168-0x000000001C660000-0x000000001C712000-memory.dmp

    Filesize

    712KB

  • memory/1284-167-0x000000001C550000-0x000000001C5A0000-memory.dmp

    Filesize

    320KB

  • memory/1616-170-0x0000000075170000-0x0000000075721000-memory.dmp

    Filesize

    5.7MB

  • memory/1616-166-0x0000000075170000-0x0000000075721000-memory.dmp

    Filesize

    5.7MB

  • memory/1624-140-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp

    Filesize

    10.8MB

  • memory/1624-137-0x0000016A122C0000-0x0000016A122CA000-memory.dmp

    Filesize

    40KB

  • memory/1684-189-0x0000000007CC0000-0x0000000007D52000-memory.dmp

    Filesize

    584KB

  • memory/2224-174-0x00000000000A0000-0x00000000000AC000-memory.dmp

    Filesize

    48KB

  • memory/2224-177-0x00000000056C0000-0x0000000005C64000-memory.dmp

    Filesize

    5.6MB

  • memory/2224-176-0x0000000004B10000-0x0000000004B76000-memory.dmp

    Filesize

    408KB

  • memory/2224-175-0x0000000004A70000-0x0000000004B0C000-memory.dmp

    Filesize

    624KB

  • memory/2340-154-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp

    Filesize

    10.8MB

  • memory/2340-144-0x000001937F5C0000-0x000001937F5D2000-memory.dmp

    Filesize

    72KB

  • memory/2340-151-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp

    Filesize

    10.8MB

  • memory/2748-156-0x0000000075170000-0x0000000075721000-memory.dmp

    Filesize

    5.7MB

  • memory/2748-165-0x0000000075170000-0x0000000075721000-memory.dmp

    Filesize

    5.7MB

  • memory/2748-153-0x0000000075170000-0x0000000075721000-memory.dmp

    Filesize

    5.7MB

  • memory/2888-185-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp

    Filesize

    10.8MB

  • memory/3792-133-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp

    Filesize

    10.8MB

  • memory/3792-150-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp

    Filesize

    10.8MB

  • memory/3792-132-0x0000000000930000-0x0000000000A7A000-memory.dmp

    Filesize

    1.3MB

  • memory/4848-155-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp

    Filesize

    10.8MB

  • memory/4848-149-0x00000000006F0000-0x0000000000774000-memory.dmp

    Filesize

    528KB

  • memory/4848-164-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp

    Filesize

    10.8MB

  • memory/4848-152-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp

    Filesize

    10.8MB