Analysis

  • max time kernel
    69s
  • max time network
    139s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    09-06-2023 11:29

General

  • Target

    file.exe

  • Size

    3.8MB

  • MD5

    4693d917d5573d64bfd2a27e46e04504

  • SHA1

    fb97fec5b335804929dc3c8fb7e69073467f4754

  • SHA256

    2d24effcdf6f620d368752b0bba8f2b96b01b82d95c36b6d5b34ddbe7740362d

  • SHA512

    05f08728f753b0c115f5e30163c08783d3e0dc68762d621bfd1887e8c41d746fba45f22fc10594f48a852222a432ca99bcfeadc2d83d316eb41c51c7f171749a

  • SSDEEP

    49152:k6fBW2t1NiKOBFAzHpe64btMTabv3/LQOlFIpfllgqSBZ7rQ0kV8e:k6

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office04

C2

hostmeta.duckdns.org:3400

Mutex

PCoa0XHES5x7Cr7a01

Attributes
  • encryption_key

    cH5E0mLkGfudyeRokQBJ

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Extracted

Family

quasar

Attributes
  • reconnect_delay

    3000

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 6 IoCs
  • RevengeRAT

    Remote-access trojan with a wide range of capabilities.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Gathers network information 2 TTPs 2 IoCs

    Uses commandline utility to view network configuration.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1264
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c ipconfig /release
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1080
      • C:\Windows\SysWOW64\ipconfig.exe
        ipconfig /release
        3⤵
        • Gathers network information
        PID:592
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMwAyAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1444
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c powershell -ENC cwBlAHQALQBtAHAAcAByAGUAZgBlAHIAZQBuAGMAZQAgAC0AZQB4AGMAbAB1AHMAaQBvAG4AcABhAHQAaAAgAEMAOgBcAA==
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:868
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        powershell -ENC cwBlAHQALQBtAHAAcAByAGUAZgBlAHIAZQBuAGMAZQAgAC0AZQB4AGMAbAB1AHMAaQBvAG4AcABhAHQAaAAgAEMAOgBcAA==
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1560
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c ipconfig /renew
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1484
      • C:\Windows\SysWOW64\ipconfig.exe
        ipconfig /renew
        3⤵
        • Gathers network information
        PID:1728
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1908

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\JTM05I0OIA8YM4WTF9EA.temp

    Filesize

    7KB

    MD5

    bd948ad37e15f4cbdd9077285d5f8563

    SHA1

    4dddffeb5524f32c11ecc8612dd398647062b5d8

    SHA256

    1f38cfb1d964bb66ba1148e11364fa8de35de59aedf6e79ca4cc72272c954fce

    SHA512

    bd48170c588bbdcd960dc4ad75ad727fde4a570274898004d3f49a478d371e8d498c801047dde78613d430f8d019295beb0108a2989436be2d18ffeec5cdd250

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

    Filesize

    7KB

    MD5

    bd948ad37e15f4cbdd9077285d5f8563

    SHA1

    4dddffeb5524f32c11ecc8612dd398647062b5d8

    SHA256

    1f38cfb1d964bb66ba1148e11364fa8de35de59aedf6e79ca4cc72272c954fce

    SHA512

    bd48170c588bbdcd960dc4ad75ad727fde4a570274898004d3f49a478d371e8d498c801047dde78613d430f8d019295beb0108a2989436be2d18ffeec5cdd250

  • memory/1264-64-0x0000000000970000-0x00000000009B0000-memory.dmp

    Filesize

    256KB

  • memory/1264-55-0x0000000000970000-0x00000000009B0000-memory.dmp

    Filesize

    256KB

  • memory/1264-56-0x0000000005990000-0x0000000005C46000-memory.dmp

    Filesize

    2.7MB

  • memory/1264-57-0x0000000000A40000-0x0000000000A64000-memory.dmp

    Filesize

    144KB

  • memory/1264-58-0x0000000004880000-0x0000000004912000-memory.dmp

    Filesize

    584KB

  • memory/1264-54-0x0000000000DD0000-0x00000000011AC000-memory.dmp

    Filesize

    3.9MB

  • memory/1444-62-0x0000000000320000-0x0000000000360000-memory.dmp

    Filesize

    256KB

  • memory/1444-65-0x0000000000320000-0x0000000000360000-memory.dmp

    Filesize

    256KB

  • memory/1444-66-0x0000000000320000-0x0000000000360000-memory.dmp

    Filesize

    256KB

  • memory/1444-67-0x0000000000320000-0x0000000000360000-memory.dmp

    Filesize

    256KB

  • memory/1444-63-0x0000000000320000-0x0000000000360000-memory.dmp

    Filesize

    256KB

  • memory/1444-61-0x0000000000320000-0x0000000000360000-memory.dmp

    Filesize

    256KB

  • memory/1560-74-0x00000000025F0000-0x0000000002630000-memory.dmp

    Filesize

    256KB

  • memory/1908-77-0x0000000000400000-0x000000000044E000-memory.dmp

    Filesize

    312KB

  • memory/1908-78-0x0000000000400000-0x000000000044E000-memory.dmp

    Filesize

    312KB

  • memory/1908-76-0x0000000000400000-0x000000000044E000-memory.dmp

    Filesize

    312KB

  • memory/1908-81-0x0000000000400000-0x000000000044E000-memory.dmp

    Filesize

    312KB

  • memory/1908-80-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1908-79-0x0000000000400000-0x000000000044E000-memory.dmp

    Filesize

    312KB

  • memory/1908-83-0x0000000000400000-0x000000000044E000-memory.dmp

    Filesize

    312KB

  • memory/1908-85-0x0000000000400000-0x000000000044E000-memory.dmp

    Filesize

    312KB

  • memory/1908-86-0x0000000004A90000-0x0000000004AD0000-memory.dmp

    Filesize

    256KB

  • memory/1908-87-0x0000000004A90000-0x0000000004AD0000-memory.dmp

    Filesize

    256KB