Analysis

  • max time kernel
    135s
  • max time network
    129s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-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 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 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 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\DB6BF30FD61D330A5466459124FD4F21.exe
    "C:\Users\Admin\AppData\Local\Temp\DB6BF30FD61D330A5466459124FD4F21.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2624
    • 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:4736
      • 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:2948
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp51AA.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4056
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2536
      • C:\Users\Admin\AppData\Roaming\sezznam.exe
        "C:\Users\Admin\AppData\Roaming\sezznam.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:4064

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp51AA.tmp.bat

    Filesize

    151B

    MD5

    cc253ea7aa5888de745eca0241517cf3

    SHA1

    e64e59f5da66409852ebbc2e1507d156a16a51d7

    SHA256

    a17c4ba8511e019790a02ac3df054ff44f6fae3e36dcd3bb89cb9658695dd807

    SHA512

    f8a3e1e829f7e3394cd9b84a9e50545f3874ca220c095be3191a2e454d4614756a68f7cf26dec1d0a751c69b2154f30afc5348df01aa3615e50a6683fe1fd625

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

    Filesize

    897KB

    MD5

    db6bf30fd61d330a5466459124fd4f21

    SHA1

    5beef951cc1052daeca87d5ef69999b3d0cc1381

    SHA256

    20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe

    SHA512

    f794a8ed161e23951299890660fd98f42cd0159aca9d6f653263170b0c63ab8b6a4ba2101f13862541440b01517da2c6348a26f1a1cec470878abe4b796474dd

  • memory/2624-3-0x0000000004C20000-0x0000000004CB2000-memory.dmp

    Filesize

    584KB

  • memory/2624-0-0x000000007457E000-0x000000007457F000-memory.dmp

    Filesize

    4KB

  • memory/2624-4-0x0000000004B00000-0x0000000004B12000-memory.dmp

    Filesize

    72KB

  • memory/2624-5-0x0000000004CC0000-0x0000000004D5C000-memory.dmp

    Filesize

    624KB

  • memory/2624-6-0x0000000074570000-0x0000000074D20000-memory.dmp

    Filesize

    7.7MB

  • memory/2624-2-0x00000000051D0000-0x0000000005774000-memory.dmp

    Filesize

    5.6MB

  • memory/2624-12-0x0000000074570000-0x0000000074D20000-memory.dmp

    Filesize

    7.7MB

  • memory/2624-1-0x00000000000C0000-0x00000000001A6000-memory.dmp

    Filesize

    920KB

  • memory/4064-16-0x0000000074570000-0x0000000074D20000-memory.dmp

    Filesize

    7.7MB

  • memory/4064-17-0x0000000074570000-0x0000000074D20000-memory.dmp

    Filesize

    7.7MB

  • memory/4064-20-0x0000000006660000-0x00000000066C6000-memory.dmp

    Filesize

    408KB

  • memory/4064-21-0x0000000074570000-0x0000000074D20000-memory.dmp

    Filesize

    7.7MB