Analysis

  • max time kernel
    91s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-11-2024 08:02

General

  • Target

    Auftragsbestätigung 20241107_pdf.com.exe

  • Size

    3.7MB

  • MD5

    5d350ff6f79df58f29f77fc7b74d892e

  • SHA1

    4cdb861ef0884b613071d7351b3564402722811f

  • SHA256

    bbea0c056d01b506a9a6d37b6aca9147466e65a962f4b140887334e6f4a23b6c

  • SHA512

    758ff980aaf24e66cc45d410c967d3f37aad9a46db9d79b815f222fd8999786637a5df7d7cb74f194b79a0216b35a3a77e8c2c2c8443194b27eef132b07664ff

  • SSDEEP

    98304:YfpDVLWR3t89g0luja0VOsfBR42dNVePoEJimT7fci+DMQzlxkPYm:qpDVaRiabbPBJdDePoEQmPfciIMF

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

DAVE

C2

hoffmann3.ydns.eu:5829

bich23.ydns.eu:5829

Mutex

309db0e8-63c5-4e08-a2f3-92745d11177da5

Attributes
  • encryption_key

    C5B555A83D127A9553D4FB1FCECB35CE8E91A447

  • install_name

    outlook.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Outlook

  • subdirectory

    WindowsUpdate

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 6 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 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe
    "C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:876
    • C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe
      "C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe"
      2⤵
        PID:3180
      • C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe
        "C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe"
        2⤵
          PID:3200
        • C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe
          "C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe"
          2⤵
            PID:1616
          • C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe
            "C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe"
            2⤵
              PID:1012
            • C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe
              "C:\Users\Admin\AppData\Local\Temp\Auftragsbestätigung 20241107_pdf.com.exe"
              2⤵
              • System Location Discovery: System Language Discovery
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:3816
              • C:\Windows\SysWOW64\schtasks.exe
                "schtasks" /create /tn "Outlook" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe" /rl HIGHEST /f
                3⤵
                • System Location Discovery: System Language Discovery
                • Scheduled Task/Job: Scheduled Task
                PID:3176
              • C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe
                "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe"
                3⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • System Location Discovery: System Language Discovery
                • Suspicious use of WriteProcessMemory
                PID:4904
                • C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe
                  "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe"
                  4⤵
                  • Executes dropped EXE
                  • System Location Discovery: System Language Discovery
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of SetWindowsHookEx
                  • Suspicious use of WriteProcessMemory
                  PID:2036
                  • C:\Windows\SysWOW64\schtasks.exe
                    "schtasks" /create /tn "Outlook" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe" /rl HIGHEST /f
                    5⤵
                    • System Location Discovery: System Language Discovery
                    • Scheduled Task/Job: Scheduled Task
                    PID:1648

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Auftragsbestätigung 20241107_pdf.com.exe.log

            Filesize

            1KB

            MD5

            8ec831f3e3a3f77e4a7b9cd32b48384c

            SHA1

            d83f09fd87c5bd86e045873c231c14836e76a05c

            SHA256

            7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

            SHA512

            26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

          • C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe

            Filesize

            3.7MB

            MD5

            5d350ff6f79df58f29f77fc7b74d892e

            SHA1

            4cdb861ef0884b613071d7351b3564402722811f

            SHA256

            bbea0c056d01b506a9a6d37b6aca9147466e65a962f4b140887334e6f4a23b6c

            SHA512

            758ff980aaf24e66cc45d410c967d3f37aad9a46db9d79b815f222fd8999786637a5df7d7cb74f194b79a0216b35a3a77e8c2c2c8443194b27eef132b07664ff

          • memory/876-5-0x00000000057D0000-0x00000000057DA000-memory.dmp

            Filesize

            40KB

          • memory/876-2-0x0000000005DF0000-0x0000000006394000-memory.dmp

            Filesize

            5.6MB

          • memory/876-4-0x00000000749B0000-0x0000000075160000-memory.dmp

            Filesize

            7.7MB

          • memory/876-1-0x0000000000A20000-0x0000000000DD6000-memory.dmp

            Filesize

            3.7MB

          • memory/876-6-0x00000000749BE000-0x00000000749BF000-memory.dmp

            Filesize

            4KB

          • memory/876-7-0x00000000749B0000-0x0000000075160000-memory.dmp

            Filesize

            7.7MB

          • memory/876-8-0x0000000005BE0000-0x0000000005BFC000-memory.dmp

            Filesize

            112KB

          • memory/876-9-0x000000000B7A0000-0x000000000BB06000-memory.dmp

            Filesize

            3.4MB

          • memory/876-10-0x000000000EBA0000-0x000000000EC3C000-memory.dmp

            Filesize

            624KB

          • memory/876-3-0x0000000005840000-0x00000000058D2000-memory.dmp

            Filesize

            584KB

          • memory/876-0-0x00000000749BE000-0x00000000749BF000-memory.dmp

            Filesize

            4KB

          • memory/876-14-0x00000000749B0000-0x0000000075160000-memory.dmp

            Filesize

            7.7MB

          • memory/2036-33-0x0000000007AD0000-0x0000000007B0C000-memory.dmp

            Filesize

            240KB

          • memory/2036-34-0x0000000007B80000-0x0000000007BE6000-memory.dmp

            Filesize

            408KB

          • memory/2036-29-0x0000000006930000-0x0000000006F48000-memory.dmp

            Filesize

            6.1MB

          • memory/2036-32-0x0000000006900000-0x0000000006912000-memory.dmp

            Filesize

            72KB

          • memory/2036-31-0x0000000006700000-0x00000000067B2000-memory.dmp

            Filesize

            712KB

          • memory/2036-30-0x0000000006490000-0x00000000064E0000-memory.dmp

            Filesize

            320KB

          • memory/3816-13-0x00000000749B0000-0x0000000075160000-memory.dmp

            Filesize

            7.7MB

          • memory/3816-22-0x00000000749B0000-0x0000000075160000-memory.dmp

            Filesize

            7.7MB

          • memory/3816-15-0x00000000749B0000-0x0000000075160000-memory.dmp

            Filesize

            7.7MB

          • memory/3816-11-0x0000000000400000-0x0000000000724000-memory.dmp

            Filesize

            3.1MB

          • memory/4904-28-0x00000000749B0000-0x0000000075160000-memory.dmp

            Filesize

            7.7MB

          • memory/4904-24-0x00000000749B0000-0x0000000075160000-memory.dmp

            Filesize

            7.7MB

          • memory/4904-23-0x00000000749B0000-0x0000000075160000-memory.dmp

            Filesize

            7.7MB