Analysis

  • max time kernel
    120s
  • max time network
    139s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    29-06-2024 16:16

General

  • Target

    DB6BF30FD61D330A5466459124FD4F21.exe

  • Size

    897KB

  • MD5

    db6bf30fd61d330a5466459124fd4f21

  • SHA1

    5beef951cc1052daeca87d5ef69999b3d0cc1381

  • SHA256

    20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe

  • SHA512

    f794a8ed161e23951299890660fd98f42cd0159aca9d6f653263170b0c63ab8b6a4ba2101f13862541440b01517da2c6348a26f1a1cec470878abe4b796474dd

  • SSDEEP

    24576:KMPzX5QdJTGSQfTWJcWF2dZ7T8IY3Sd+L0S6D9:KMLqXTGSjcQmZ7QIcSEmD

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.6D

Botnet

Default

C2

seznam.zapto.org:6606

seznam.zapto.org:7707

seznam.zapto.org:8808

Mutex

zaqhepdivuiitce

Attributes
  • delay

    5

  • install

    true

  • install_file

    sezznam.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\DB6BF30FD61D330A5466459124FD4F21.exe
    "C:\Users\Admin\AppData\Local\Temp\DB6BF30FD61D330A5466459124FD4F21.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2992
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /ru system /rl highest /tn DB6BF30FD61D330A5466459124FD4F21 /tr '"C:\Users\Admin\AppData\Roaming\sezznam.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:804
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /ru system /rl highest /tn DB6BF30FD61D330A5466459124FD4F21 /tr '"C:\Users\Admin\AppData\Roaming\sezznam.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2260
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp3AEE.tmp.bat""
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2140
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2820
      • C:\Users\Admin\AppData\Roaming\sezznam.exe
        "C:\Users\Admin\AppData\Roaming\sezznam.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:2788

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp3AEE.tmp.bat

    Filesize

    151B

    MD5

    4004d959e6f00c5579d92bbb21995f74

    SHA1

    4dee2c1147dc571443fbcaf5dfe1ef371cb732c1

    SHA256

    97a53bbaa866fbaa7d2ece5a81aa4617843ec422cfc2163271f997bb57d331ae

    SHA512

    514f135308f1399fca1b1c2ca33e8465419cce19aa423c65f5231b4e0885f80c6e973ad47c250e188aff476f807d1bb201ad1a6db380d5c49c1e598d032dacee

  • \Users\Admin\AppData\Roaming\sezznam.exe

    Filesize

    897KB

    MD5

    db6bf30fd61d330a5466459124fd4f21

    SHA1

    5beef951cc1052daeca87d5ef69999b3d0cc1381

    SHA256

    20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe

    SHA512

    f794a8ed161e23951299890660fd98f42cd0159aca9d6f653263170b0c63ab8b6a4ba2101f13862541440b01517da2c6348a26f1a1cec470878abe4b796474dd

  • memory/2788-17-0x00000000008A0000-0x0000000000986000-memory.dmp

    Filesize

    920KB

  • memory/2788-18-0x00000000002A0000-0x00000000002B2000-memory.dmp

    Filesize

    72KB

  • memory/2992-0-0x00000000748FE000-0x00000000748FF000-memory.dmp

    Filesize

    4KB

  • memory/2992-1-0x0000000000C60000-0x0000000000D46000-memory.dmp

    Filesize

    920KB

  • memory/2992-2-0x0000000000370000-0x0000000000382000-memory.dmp

    Filesize

    72KB

  • memory/2992-3-0x00000000748F0000-0x0000000074FDE000-memory.dmp

    Filesize

    6.9MB

  • memory/2992-13-0x00000000748F0000-0x0000000074FDE000-memory.dmp

    Filesize

    6.9MB