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Resubmissions

11/03/2025, 16:25

250311-txbamsxq12 10

10/03/2025, 16:59

250310-vhtzwastaz 10

Analysis

  • max time kernel
    112s
  • max time network
    129s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250217-en
  • resource tags

    arch:x64arch:x86image:win11-20250217-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    10/03/2025, 16:59

General

  • Target

    cdnmain/ef.exe

  • Size

    54KB

  • MD5

    0ed9406036832e40f6ace06478acdf44

  • SHA1

    9a3ca883ec34bdfd1c21c61c6ca6d03c5365fa6e

  • SHA256

    452e3305df1bf06c79301b9b87de1ec82561a793c4ef4ea5a02803123891b9f6

  • SHA512

    9de32c71a4657d3e9ebd01fd1d933fd44b23c99809bbd0c8c423dcf8436d8c3f81e390ec34df8fb2e5a3a28974c864750ceaeb65693c04b1c5a1f8134eca69a5

  • SSDEEP

    1536:de/mS9oEXN9p7aNJahXy4zGuH4XlqJaAIT+7bqhyX9qZ:d+mSawsLawqGMolq07i7bqMX9W

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

2.58.56.179:2035

Mutex

r4ttlesn4ke_ufog3f8u3egef978

Attributes
  • delay

    1

  • install

    true

  • install_file

    Chrome.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Asyncrat family
  • Async RAT payload 1 IoCs
  • Executes dropped EXE 2 IoCs
  • 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 19 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 12 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\cdnmain\ef.exe
    "C:\Users\Admin\AppData\Local\Temp\cdnmain\ef.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3732
    • C:\Users\Admin\AppData\Local\Temp\chrome.exe
      "C:\Users\Admin\AppData\Local\Temp\chrome.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1600
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Chrome" /tr '"C:\Users\Admin\AppData\Roaming\Chrome.exe"' & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1708
        • C:\Windows\system32\schtasks.exe
          schtasks /create /f /sc onlogon /rl highest /tn "Chrome" /tr '"C:\Users\Admin\AppData\Roaming\Chrome.exe"'
          4⤵
          • Scheduled Task/Job: Scheduled Task
          PID:4512
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB873.tmp.bat""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4120
        • C:\Windows\system32\timeout.exe
          timeout 3
          4⤵
          • Delays execution with timeout.exe
          PID:2592
        • C:\Users\Admin\AppData\Roaming\Chrome.exe
          "C:\Users\Admin\AppData\Roaming\Chrome.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          PID:4264

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Chrome.exe.log

    Filesize

    425B

    MD5

    de75c43a265d0848584ae05945570edf

    SHA1

    69f95177914f8d8b2f278a91f585a0024b8dffd3

    SHA256

    d9bdf6a2bfdd9b2b5c8593de17ade3d8d317dad331aa6ca0da7483dd06db1140

    SHA512

    365f29c693dd7aa2ade092d765a96f20bf1f7fa93bca7f3b25aeddf5700817b9fd388e8f7d9f1b781c8a876739b06ad16d61e7ed08a1c85ac4be4686a38c63bc

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

    Filesize

    48KB

    MD5

    560316acf1e4be6ee63f609da37e71b5

    SHA1

    5f22dcf7736356e24b92397162acb723010914fb

    SHA256

    44d97fbdb694ca55e3beec4ec031ef5162018bdbaff6a968ac25a21e078511b0

    SHA512

    38d185d48cf537162ef8302df31cdf723d7407765f21284492345cae914d38ec9e3a6cfee0080b5ff9ebef29f7ac54a505ea2e6fea5d65a60c4e6e1e67fb3361

  • C:\Users\Admin\AppData\Local\Temp\tmpB873.tmp.bat

    Filesize

    150B

    MD5

    8467c56629b1bcb88212bdad2de927a3

    SHA1

    39bb782650fce3eb297bcd2bef6713ce50ae3e51

    SHA256

    a5166966dba898c339eaefc6c8ec362e98a3f201481891ca217cb06ac9567782

    SHA512

    5f4d4a4645ca1cd46f0751a4242b3c5ee6ddd885ad6c898429e29ba3185df7fd22b3231aea7993c2e09b8d9d2b28f75b6e94b2541a974cf7cfa13e9bb5615f4a

  • memory/1600-15-0x0000000000B70000-0x0000000000B82000-memory.dmp

    Filesize

    72KB

  • memory/1600-17-0x00007FFAB9FC0000-0x00007FFABAA82000-memory.dmp

    Filesize

    10.8MB

  • memory/1600-18-0x00007FFAB9FC0000-0x00007FFABAA82000-memory.dmp

    Filesize

    10.8MB

  • memory/1600-23-0x00007FFAB9FC0000-0x00007FFABAA82000-memory.dmp

    Filesize

    10.8MB

  • memory/3732-0-0x00007FFAB9FC3000-0x00007FFAB9FC5000-memory.dmp

    Filesize

    8KB

  • memory/3732-1-0x0000000000B70000-0x0000000000B84000-memory.dmp

    Filesize

    80KB

  • memory/3732-3-0x00007FFAB9FC0000-0x00007FFABAA82000-memory.dmp

    Filesize

    10.8MB

  • memory/3732-16-0x00007FFAB9FC0000-0x00007FFABAA82000-memory.dmp

    Filesize

    10.8MB