Analysis

  • max time kernel
    147s
  • max time network
    149s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    21-06-2024 11:10

General

  • Target

    Dllhost.exe

  • Size

    47KB

  • MD5

    e15052ab153401b16594f794a424d048

  • SHA1

    31cab904e1f3bce48ce9bac3d794771943e50588

  • SHA256

    e32914230692a86ded5fb3da76281331b1453e44b731ad92ed5c49b5ca723946

  • SHA512

    12d89b33423167b5ad6aef5a1feae65b3d47abb2999a6bf3bb503b96f74b58db9adb2855cc161d58cb068851e69ff030c47327968be69ab68126ec9c13d377aa

  • SSDEEP

    768:8uQSNTvEEaBrWUXFd5mo2qmi8xwdH9NXSPI2CDcGT40b2j1UvGzHx9mvBDZkx:8uQSNT8572xpKHDD1vb2YGzLmZdkx

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

carolina-reverse.gl.at.ply.gg:34609

Mutex

DL8q7udp2Hxw

Attributes
  • delay

    3

  • install

    true

  • install_file

    SolaraHoster.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
  • 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 15 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Dllhost.exe
    "C:\Users\Admin\AppData\Local\Temp\Dllhost.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4452
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "SolaraHoster" /tr '"C:\Users\Admin\AppData\Roaming\SolaraHoster.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4608
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "SolaraHoster" /tr '"C:\Users\Admin\AppData\Roaming\SolaraHoster.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4356
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp854D.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:192
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3692
      • C:\Users\Admin\AppData\Roaming\SolaraHoster.exe
        "C:\Users\Admin\AppData\Roaming\SolaraHoster.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:3856

Network

MITRE ATT&CK Matrix ATT&CK v13

Execution

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Discovery

System Information Discovery

1
T1082

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp854D.tmp.bat
    Filesize

    156B

    MD5

    a74f0945740c700d2e973cb492d6ffc3

    SHA1

    60a5859e35acb1ebd3118bcdcd9ce0b7c4ee365a

    SHA256

    a879d79e2c6b55e1eeee0c95f657a0c0ed6438cb0eec95e12d863cde8c106d72

    SHA512

    fff86a9d572a829cec0ebc5ccfa62dc05c1c8437daa102aaf8ce7f2a29ec48c750b83b856390cd6788edf29eb344b470895e2d803ad5bc4e89d5acd3e0ee153e

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

    47KB

    MD5

    e15052ab153401b16594f794a424d048

    SHA1

    31cab904e1f3bce48ce9bac3d794771943e50588

    SHA256

    e32914230692a86ded5fb3da76281331b1453e44b731ad92ed5c49b5ca723946

    SHA512

    12d89b33423167b5ad6aef5a1feae65b3d47abb2999a6bf3bb503b96f74b58db9adb2855cc161d58cb068851e69ff030c47327968be69ab68126ec9c13d377aa

  • memory/3856-16-0x0000000006330000-0x000000000682E000-memory.dmp
    Filesize

    5.0MB

  • memory/4452-0-0x000000007343E000-0x000000007343F000-memory.dmp
    Filesize

    4KB

  • memory/4452-1-0x0000000000C70000-0x0000000000C82000-memory.dmp
    Filesize

    72KB

  • memory/4452-2-0x0000000073430000-0x0000000073B1E000-memory.dmp
    Filesize

    6.9MB

  • memory/4452-3-0x0000000005460000-0x00000000054C6000-memory.dmp
    Filesize

    408KB

  • memory/4452-4-0x0000000005940000-0x00000000059DC000-memory.dmp
    Filesize

    624KB

  • memory/4452-9-0x0000000073430000-0x0000000073B1E000-memory.dmp
    Filesize

    6.9MB