Analysis

  • max time kernel
    264s
  • max time network
    270s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    10-07-2024 21:05

General

  • Target

    creative sound blaster.exe

  • Size

    272KB

  • MD5

    ec3968fd0cf6b025017dbb83249de6f2

  • SHA1

    e1805d0f7984f46819320f2121fc67948c0cdfa5

  • SHA256

    3537198ebe7eb84bea0eaf47c3955d02b7d6b0d94cef1415d25c1558191a19bd

  • SHA512

    f73da223c70fe28f0f0515d17c56e3c8f2ced64894489749a9ad02822995e72429b6ab50963d84676a3de1f76d48bc5952cbb98f044376929332964fb228c509

  • SSDEEP

    3072:pUTcxgTEiPMVTb3SH1bnrgYQgy9ckYMmlB/v6A80XH3e55EVu9cBY:pCEiPMVTbiVb0YS5YM6VyA80XHbUe

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

dllhost.dat

C2

147.185.221.21:5552

147.185.221.21:6643

Mutex

evyjfpsdxkkqc

Attributes
  • delay

    1

  • install

    true

  • install_file

    dllhost.dat.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Delays execution with timeout.exe 1 IoCs
  • 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 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 15 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\creative sound blaster.exe
    "C:\Users\Admin\AppData\Local\Temp\creative sound blaster.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1528
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "dllhost.dat" /tr '"C:\Users\Admin\AppData\Roaming\dllhost.dat.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2116
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "dllhost.dat" /tr '"C:\Users\Admin\AppData\Roaming\dllhost.dat.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2320
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpB7EA.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1824
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:532
      • C:\Users\Admin\AppData\Roaming\dllhost.dat.exe
        "C:\Users\Admin\AppData\Roaming\dllhost.dat.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:2760

Network

MITRE ATT&CK Matrix ATT&CK v13

Execution

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Discovery

Query Registry

2
T1012

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\CabD2EB.tmp
    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

  • C:\Users\Admin\AppData\Local\Temp\Tar47FD.tmp
    Filesize

    181KB

    MD5

    4ea6026cf93ec6338144661bf1202cd1

    SHA1

    a1dec9044f750ad887935a01430bf49322fbdcb7

    SHA256

    8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

    SHA512

    6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

  • C:\Users\Admin\AppData\Local\Temp\tmpB7EA.tmp.bat
    Filesize

    155B

    MD5

    d537876f80100a94dc34b66d8cbec3c0

    SHA1

    27531fa4eeb5337138e95bb19dad91e288c41cee

    SHA256

    c679f362e6faa381931975e9d04e74516aae1b5f579ade26afeda96d5802276d

    SHA512

    b1b7a9bf7ffe526f7dd734b523d8b23d69c54f181b4111df0f21155a4aef801c97165748befe085906b9e7b69ea158c2d8e47ccd9233aca96078b69deea124c5

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

    8B

    MD5

    cf759e4c5f14fe3eec41b87ed756cea8

    SHA1

    c27c796bb3c2fac929359563676f4ba1ffada1f5

    SHA256

    c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

    SHA512

    c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

  • C:\Users\Admin\AppData\Roaming\dllhost.dat.exe
    Filesize

    272KB

    MD5

    ec3968fd0cf6b025017dbb83249de6f2

    SHA1

    e1805d0f7984f46819320f2121fc67948c0cdfa5

    SHA256

    3537198ebe7eb84bea0eaf47c3955d02b7d6b0d94cef1415d25c1558191a19bd

    SHA512

    f73da223c70fe28f0f0515d17c56e3c8f2ced64894489749a9ad02822995e72429b6ab50963d84676a3de1f76d48bc5952cbb98f044376929332964fb228c509

  • memory/1528-0-0x000007FEF5263000-0x000007FEF5264000-memory.dmp
    Filesize

    4KB

  • memory/1528-1-0x0000000000880000-0x00000000008CA000-memory.dmp
    Filesize

    296KB

  • memory/1528-3-0x000007FEF5260000-0x000007FEF5C4C000-memory.dmp
    Filesize

    9.9MB

  • memory/1528-12-0x000007FEF5260000-0x000007FEF5C4C000-memory.dmp
    Filesize

    9.9MB

  • memory/1528-13-0x000007FEF5260000-0x000007FEF5C4C000-memory.dmp
    Filesize

    9.9MB

  • memory/2760-18-0x0000000000D80000-0x0000000000DCA000-memory.dmp
    Filesize

    296KB