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Overview

overview

10

Static

static

10

F5E715D046...07.exe

windows7-x64

10

F5E715D046...07.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    159s
  • max time network
    170s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/10/2022, 18:07

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General

  • Target

    F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe

  • Size

    176KB

  • MD5

    f8b8c7e30a0c98c7db0c64d4b925db75

  • SHA1

    928ec1e03d21f51f34da1a7c801fdce9a36b3c36

  • SHA256

    f5e715d046072f8716f662bb86a02be3f13dd984ed207562c9e8e3feb6aeab40

  • SHA512

    67d7c8c62877a0d274089ef062a85e1b0622bcb6ccfc86d3bd9234973af514e211c4a3043504c597429ade35524f314efecea75a4695bf5489e282fef3cedef3

  • SSDEEP

    3072:tuK0THf52BTHbvxPZYJ01yDgNlfWSZ0cXF:tuK+chHbIpgy/m

Score
10/10
asyncratdefaultrat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

zulakim.duckdns.org:6606

zulakim.duckdns.org:7707

zulakim.duckdns.org:8808
Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    dllhost.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers.

    ratasyncrat
  • Async RAT payload 3 IoCs
    rat
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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.

    persistence
  • Delays execution with timeout.exe 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
    "C:\Users\Admin\AppData\Local\Temp\F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1044
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "dllhost" /tr '"C:\Users\Admin\AppData\Roaming\dllhost.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3080
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "dllhost" /tr '"C:\Users\Admin\AppData\Roaming\dllhost.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:4432
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA4C7.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1940
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3060
      • C:\Users\Admin\AppData\Roaming\dllhost.exe
        "C:\Users\Admin\AppData\Roaming\dllhost.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:4588

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpA4C7.tmp.bat
    Filesize

    151B

    MD5

    ec113f4c1bb20e51b55990a373026e22

    SHA1

    f5e504a601cefadff05a41457b1a21535bbf3cc5

    SHA256

    8b4218b16af1d3da63c22f893504a880e73111fb7ba3453299f0e20380918ed5

    SHA512

    17db8b747a79b292325f9598670506dd57dc10a25852874c3461af05470bc2b082bd31b941bd683e60141c795fd0a70630c503f263542c675bdd43ac1ce9bd01

    Download Submit

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

    176KB

    MD5

    f8b8c7e30a0c98c7db0c64d4b925db75

    SHA1

    928ec1e03d21f51f34da1a7c801fdce9a36b3c36

    SHA256

    f5e715d046072f8716f662bb86a02be3f13dd984ed207562c9e8e3feb6aeab40

    SHA512

    67d7c8c62877a0d274089ef062a85e1b0622bcb6ccfc86d3bd9234973af514e211c4a3043504c597429ade35524f314efecea75a4695bf5489e282fef3cedef3

    Download Submit

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

    176KB

    MD5

    f8b8c7e30a0c98c7db0c64d4b925db75

    SHA1

    928ec1e03d21f51f34da1a7c801fdce9a36b3c36

    SHA256

    f5e715d046072f8716f662bb86a02be3f13dd984ed207562c9e8e3feb6aeab40

    SHA512

    67d7c8c62877a0d274089ef062a85e1b0622bcb6ccfc86d3bd9234973af514e211c4a3043504c597429ade35524f314efecea75a4695bf5489e282fef3cedef3

    Download Submit

  • memory/1044-132-0x0000000000180000-0x00000000001B2000-memory.dmp

    Filesize

    200KB

    Download

  • memory/1044-133-0x00000000050C0000-0x000000000515C000-memory.dmp

    Filesize

    624KB

    Download

  • memory/4588-142-0x0000000005E10000-0x00000000063B4000-memory.dmp

    Filesize

    5.6MB

    Download

  • memory/4588-143-0x00000000058D0000-0x0000000005936000-memory.dmp

    Filesize

    408KB

    Download