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Overview

overview

10

Static

static

3

brr.exe

windows7-x64

10

brr.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    40s
  • max time network
    45s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • submitted
    17/08/2024, 17:08

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General

  • Target

    brr.exe

  • Size

    827KB

  • MD5

    92867f5de7d9de203c1f9f4781961863

  • SHA1

    103fa7ef6a97862f568d410e7607e34f1c41da18

  • SHA256

    4b90d4fb520d1deda7f182e1a19e7750979086bfbae6e2b44b276c8130e7c0c8

  • SHA512

    818208e48ebc2797645dce2d79545215e5c4d32bed0ac65ae14f72d388a6179ebf2268690ec6c8f6923ef1a57d71bebc9e26e1906df16843b729f30b06746f34

  • SSDEEP

    12288:xMSApJVYG5lDLyjsb0eOzkv4R7QnvUUilQ35+6G75V9nKas/fHmwj:xnsJ39LyjbJkQFMhmC+6GD9KTuA

Score
10/10
asyncratxredcrownbackdoordiscoverypersistencerat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Crown

C2

127.0.0.1:9090

127.0.0.1:5013

147.185.221.22:9090

147.185.221.22:5013
Mutex

vopltdrmzkidmoli

Attributes
  • delay

    1

  • install

    true

  • install_file

    Windows.exe

  • install_folder

    %Temp%

aes.plain

Extracted

Family

xred

C2

xred.mooo.com

Attributes
  • email

    [email protected]

  • payload_url

    http://freedns.afraid.org/api/?action=getdyndns&sha=a30fa98efc092684e8d1c5cff797bcc613562978

    https://docs.google.com/uc?id=0BxsMXGfPIZfSVlVsOGlEVGxuZVk&export=download

    https://www.dropbox.com/s/n1w4p8gc6jzo0sg/SUpdate.ini?dl=1

    http://xred.site50.net/syn/SUpdate.ini

    https://docs.google.com/uc?id=0BxsMXGfPIZfSVzUyaHFYVkQxeFk&export=download

    https://www.dropbox.com/s/zhp1b06imehwylq/Synaptics.rar?dl=1

    http://xred.site50.net/syn/Synaptics.rar

    https://docs.google.com/uc?id=0BxsMXGfPIZfSTmlVYkxhSDg5TzQ&export=download

    https://www.dropbox.com/s/fzj752whr3ontsm/SSLLibrary.dll?dl=1

    http://xred.site50.net/syn/SSLLibrary.dll

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

    ratasyncrat
  • Asyncrat family
    asyncrat
  • Xred

    Xred is backdoor written in Delphi.

    backdoorxred
  • Xred family
    xred
  • Async RAT payload 1 IoCs
    rat
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 5 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\brr.exe
    "C:\Users\Admin\AppData\Local\Temp\brr.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2112
    • C:\Users\Admin\AppData\Local\Temp\._cache_brr.exe
      "C:\Users\Admin\AppData\Local\Temp\._cache_brr.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1916
    • C:\ProgramData\Synaptics\Synaptics.exe
      "C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2148
      • C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe
        "C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe" InjUpdate
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:2740
  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /automation -Embedding
    1⤵
    • System Location Discovery: System Language Discovery
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:800

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\Synaptics\Synaptics.exe
    Filesize

    827KB

    MD5

    92867f5de7d9de203c1f9f4781961863

    SHA1

    103fa7ef6a97862f568d410e7607e34f1c41da18

    SHA256

    4b90d4fb520d1deda7f182e1a19e7750979086bfbae6e2b44b276c8130e7c0c8

    SHA512

    818208e48ebc2797645dce2d79545215e5c4d32bed0ac65ae14f72d388a6179ebf2268690ec6c8f6923ef1a57d71bebc9e26e1906df16843b729f30b06746f34

    Download Submit

  • C:\Users\Admin\AppData\Local\Temp\._cache_brr.exe
    Filesize

    74KB

    MD5

    05a780ca5b8f32b1fbbc0b8e0012247f

    SHA1

    518bbe68186667deda350cf3475bee4dee5e071c

    SHA256

    4b685783cf16a471b5c4b8c117e9b12ad37b590b521a003167eb3692c9b66df0

    SHA512

    4b52ec4a1dfb96fa5c6d4109c2bbc0d64ec130d5f52cca9ce947a3b371eb8a791c1b9687829f3fcb32946ebe8bdbf8055239c86a7b7e2c9bffa9256d74580243

    Download Submit

  • C:\Users\Admin\AppData\Local\Temp\KUxdLaZc.xlsm
    Filesize

    17KB

    MD5

    e566fc53051035e1e6fd0ed1823de0f9

    SHA1

    00bc96c48b98676ecd67e81a6f1d7754e4156044

    SHA256

    8e574b4ae6502230c0829e2319a6c146aebd51b7008bf5bbfb731424d7952c15

    SHA512

    a12f56ff30ea35381c2b8f8af2446cf1daa21ee872e98cad4b863db060acd4c33c5760918c277dadb7a490cb4ca2f925d59c70dc5171e16601a11bc4a6542b04

    Download Submit

  • C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf
    Filesize

    8B

    MD5

    cf759e4c5f14fe3eec41b87ed756cea8

    SHA1

    c27c796bb3c2fac929359563676f4ba1ffada1f5

    SHA256

    c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

    SHA512

    c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

    Download Submit

  • memory/800-39-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1916-17-0x00000000003E0000-0x00000000003F8000-memory.dmp

    Filesize

    96KB

    Download

  • memory/2112-0-0x0000000000220000-0x0000000000221000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2112-26-0x0000000000400000-0x00000000004D5000-memory.dmp

    Filesize

    852KB

    Download

  • memory/2148-59-0x0000000000400000-0x00000000004D5000-memory.dmp

    Filesize

    852KB

    Download

  • memory/2148-60-0x0000000000400000-0x00000000004D5000-memory.dmp

    Filesize

    852KB

    Download

  • memory/2740-37-0x0000000000320000-0x0000000000338000-memory.dmp

    Filesize

    96KB

    Download