Analysis

  • max time kernel
    88s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    26-09-2021 22:02

General

  • Target

    3B599CC4DBEDAC85F9D2E5E4F1B96110F05835BBDFB0C.exe

  • Size

    48KB

  • MD5

    852b69a95f1ae83d9142fced3450977b

  • SHA1

    a48b15998be1e979530994675da17566d1769769

  • SHA256

    3b599cc4dbedac85f9d2e5e4f1b96110f05835bbdfb0c01a84bdaaec79885a19

  • SHA512

    23b4602cbcd8abd3c78953e07301daaaaa5e7ff2ea1abba28cecfecd3e6522f0a31a97f7b537c98d2a3a00671b8c9b1d06d0b9e63f9e8359a9395081f1d2f8c9

Score
10/10

Malware Config

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers.

  • suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)

    suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)

  • Async RAT payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 13 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3B599CC4DBEDAC85F9D2E5E4F1B96110F05835BBDFB0C.exe
    "C:\Users\Admin\AppData\Local\Temp\3B599CC4DBEDAC85F9D2E5E4F1B96110F05835BBDFB0C.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3728
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Gruop" /tr '"C:\Users\Admin\AppData\Roaming\Gruop.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:752
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Gruop" /tr '"C:\Users\Admin\AppData\Roaming\Gruop.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:60
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4272.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:424
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2244
      • C:\Users\Admin\AppData\Roaming\Gruop.exe
        "C:\Users\Admin\AppData\Roaming\Gruop.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:580

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp4272.tmp.bat
    MD5

    f27130d2aafa37bed16d663a4d15f967

    SHA1

    1b648df4adc749084520239bccfa546daebb8020

    SHA256

    f1eb6d3d27ee1f51b83a52eb9c83d2225aff1b1b6d66423645891bd903d206ce

    SHA512

    3dc5d044f40dc95e7f3d6c73c5a5b4f233c63853f9c793dfcae7d056569984d9739f6d7453289f0e94eb33a9d962d8bb173292d752fd1a815fb2cec46596bd13

  • C:\Users\Admin\AppData\Roaming\Gruop.exe
    MD5

    852b69a95f1ae83d9142fced3450977b

    SHA1

    a48b15998be1e979530994675da17566d1769769

    SHA256

    3b599cc4dbedac85f9d2e5e4f1b96110f05835bbdfb0c01a84bdaaec79885a19

    SHA512

    23b4602cbcd8abd3c78953e07301daaaaa5e7ff2ea1abba28cecfecd3e6522f0a31a97f7b537c98d2a3a00671b8c9b1d06d0b9e63f9e8359a9395081f1d2f8c9

  • C:\Users\Admin\AppData\Roaming\Gruop.exe
    MD5

    852b69a95f1ae83d9142fced3450977b

    SHA1

    a48b15998be1e979530994675da17566d1769769

    SHA256

    3b599cc4dbedac85f9d2e5e4f1b96110f05835bbdfb0c01a84bdaaec79885a19

    SHA512

    23b4602cbcd8abd3c78953e07301daaaaa5e7ff2ea1abba28cecfecd3e6522f0a31a97f7b537c98d2a3a00671b8c9b1d06d0b9e63f9e8359a9395081f1d2f8c9

  • memory/60-121-0x0000000000000000-mapping.dmp
  • memory/424-119-0x0000000000000000-mapping.dmp
  • memory/580-123-0x0000000000000000-mapping.dmp
  • memory/580-128-0x0000000004A80000-0x0000000004A81000-memory.dmp
    Filesize

    4KB

  • memory/580-130-0x0000000005620000-0x0000000005621000-memory.dmp
    Filesize

    4KB

  • memory/580-131-0x0000000005190000-0x0000000005191000-memory.dmp
    Filesize

    4KB

  • memory/752-118-0x0000000000000000-mapping.dmp
  • memory/2244-122-0x0000000000000000-mapping.dmp
  • memory/3728-114-0x0000000000430000-0x0000000000431000-memory.dmp
    Filesize

    4KB

  • memory/3728-117-0x0000000004F50000-0x0000000004F51000-memory.dmp
    Filesize

    4KB

  • memory/3728-116-0x0000000004C40000-0x0000000004C41000-memory.dmp
    Filesize

    4KB