Analysis

  • max time kernel
    133s
  • max time network
    135s
  • 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 11:13

General

  • Target

    Dllhost.exe

  • Size

    47KB

  • MD5

    44359c5e869c44100cfe1dd316d4f0a2

  • SHA1

    26f8aed6286f69c9d9884ffa1c81d931b77e94c1

  • SHA256

    503a126804af61976611e4fa3f4991a2e3c6741029a6ac8aa2c5411a192f2115

  • SHA512

    e3edb5700da4b86ee0ff0e5ba2aff9b2fc2b5107c449cef301c8a6117eaef68ef7b2778d20e7c03a80a44023638faf5a3f5a8536f09996bb1e88fef4ea641210

  • SSDEEP

    768:kuMmi+TXEFlvWUjVSNmo2qzeXUvnzy+ueMnPI80LDXBqH500bs1vY/5Z06Kg6BD4:kuMmi+TXGk2fUu+oA80HcFbs5Y/bydcx

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

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

Mutex

T2iVdWpLQAd2

Attributes
  • delay

    3

  • install

    true

  • install_file

    SolaraUpdateHoster.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:4092
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "SolaraUpdateHoster" /tr '"C:\Users\Admin\AppData\Roaming\SolaraUpdateHoster.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4596
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "SolaraUpdateHoster" /tr '"C:\Users\Admin\AppData\Roaming\SolaraUpdateHoster.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1856
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6FE0.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4308
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3240
      • C:\Users\Admin\AppData\Roaming\SolaraUpdateHoster.exe
        "C:\Users\Admin\AppData\Roaming\SolaraUpdateHoster.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:3800

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

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp6FE0.tmp.bat
    Filesize

    162B

    MD5

    d80286cd1d92e7638f2081497541bff7

    SHA1

    483d8704f1c984649622bd8caa9b10d243bddb3f

    SHA256

    4c3d0069686ceffbaec6a47b51dd855f371c7e5b4cb504c07f68190fd804c20d

    SHA512

    ffac814581c3e74fca6edf01d332f58fcca6b2f9e7e9663f28cde7a562df284020e07cc24da7f0b301165144c381c8a6c7197ee02ab69ae89097ce9a0fba46c1

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

    47KB

    MD5

    44359c5e869c44100cfe1dd316d4f0a2

    SHA1

    26f8aed6286f69c9d9884ffa1c81d931b77e94c1

    SHA256

    503a126804af61976611e4fa3f4991a2e3c6741029a6ac8aa2c5411a192f2115

    SHA512

    e3edb5700da4b86ee0ff0e5ba2aff9b2fc2b5107c449cef301c8a6117eaef68ef7b2778d20e7c03a80a44023638faf5a3f5a8536f09996bb1e88fef4ea641210

  • memory/3800-16-0x0000000006320000-0x000000000681E000-memory.dmp
    Filesize

    5.0MB

  • memory/3800-17-0x0000000006B20000-0x0000000006B96000-memory.dmp
    Filesize

    472KB

  • memory/3800-18-0x0000000006AB0000-0x0000000006B14000-memory.dmp
    Filesize

    400KB

  • memory/3800-19-0x0000000006C10000-0x0000000006C2E000-memory.dmp
    Filesize

    120KB

  • memory/4092-0-0x0000000073A0E000-0x0000000073A0F000-memory.dmp
    Filesize

    4KB

  • memory/4092-1-0x0000000000070000-0x0000000000082000-memory.dmp
    Filesize

    72KB

  • memory/4092-2-0x0000000073A00000-0x00000000740EE000-memory.dmp
    Filesize

    6.9MB

  • memory/4092-3-0x0000000004860000-0x00000000048C6000-memory.dmp
    Filesize

    408KB

  • memory/4092-4-0x0000000004D30000-0x0000000004DCC000-memory.dmp
    Filesize

    624KB

  • memory/4092-9-0x0000000073A00000-0x00000000740EE000-memory.dmp
    Filesize

    6.9MB