Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240412-en
  • resource tags

    arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    17-04-2024 04:42

General

  • Target

    0b685b0d52d434ab8311127daa63ae5597f7948d5a73016a1f8211587040b9a6.exe

  • Size

    48KB

  • MD5

    7fd8581748cdf137023ef96f1286ce0f

  • SHA1

    c640bcbbebbe62c2a58235d1e6f9ec7eeb99387a

  • SHA256

    0b685b0d52d434ab8311127daa63ae5597f7948d5a73016a1f8211587040b9a6

  • SHA512

    bd4c7c3f646e4685fc750f69ca5b9af6d542ee4d22db1b9ae3b379b659d415e3f9895bde81f40448f927662ede5cd87fe0f85234134b519c9aa7900f1b811282

  • SSDEEP

    1536:AuLN+Twip21CyEHq3LbAMZhgwaBOcd8L:AuLMTwip21CyEHq3LbAKhgCceL

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

94.228.162.82:6606

94.228.162.82:7707

94.228.162.82:8808

Mutex

YBc01FE5mcOd

Attributes
  • delay

    3

  • install

    true

  • install_file

    appBroker.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Detect ZGRat V1 2 IoCs
  • ZGRat

    ZGRat is remote access trojan written in C#.

  • Async RAT payload 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Enumerates physical storage devices 1 TTPs

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

  • 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 19 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0b685b0d52d434ab8311127daa63ae5597f7948d5a73016a1f8211587040b9a6.exe
    "C:\Users\Admin\AppData\Local\Temp\0b685b0d52d434ab8311127daa63ae5597f7948d5a73016a1f8211587040b9a6.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4132
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "appBroker" /tr '"C:\Users\Admin\AppData\Roaming\appBroker.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1760
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "appBroker" /tr '"C:\Users\Admin\AppData\Roaming\appBroker.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:2980
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp67D2.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4948
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3964
      • C:\Users\Admin\AppData\Roaming\appBroker.exe
        "C:\Users\Admin\AppData\Roaming\appBroker.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:628

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp67D2.tmp.bat

    Filesize

    153B

    MD5

    0cd863a34e7a2a1443e8dab79de29b0b

    SHA1

    c59c85402b37246242d04976eda46a9735593dbb

    SHA256

    83233dafbd6589c82a3fc34e8e8f488cd11ec8b2e90e38c1891c5f625ab918bd

    SHA512

    dcf60cb28f30a1b67ff64f56eca8b42ca8d623779ce8417b30de56bc06289fd1f1c3687af65d82957fb05d57fa98ce8ad920917e137bfa02414d10a3745cf85b

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

    Filesize

    48KB

    MD5

    7fd8581748cdf137023ef96f1286ce0f

    SHA1

    c640bcbbebbe62c2a58235d1e6f9ec7eeb99387a

    SHA256

    0b685b0d52d434ab8311127daa63ae5597f7948d5a73016a1f8211587040b9a6

    SHA512

    bd4c7c3f646e4685fc750f69ca5b9af6d542ee4d22db1b9ae3b379b659d415e3f9895bde81f40448f927662ede5cd87fe0f85234134b519c9aa7900f1b811282

  • memory/628-18-0x0000000006B10000-0x0000000006BAC000-memory.dmp

    Filesize

    624KB

  • memory/628-17-0x0000000006890000-0x0000000006906000-memory.dmp

    Filesize

    472KB

  • memory/628-24-0x0000000005270000-0x0000000005280000-memory.dmp

    Filesize

    64KB

  • memory/628-23-0x0000000006E10000-0x0000000006E72000-memory.dmp

    Filesize

    392KB

  • memory/628-22-0x0000000074DD0000-0x0000000075581000-memory.dmp

    Filesize

    7.7MB

  • memory/628-13-0x0000000074DD0000-0x0000000075581000-memory.dmp

    Filesize

    7.7MB

  • memory/628-14-0x0000000005270000-0x0000000005280000-memory.dmp

    Filesize

    64KB

  • memory/628-15-0x0000000005C20000-0x00000000061C6000-memory.dmp

    Filesize

    5.6MB

  • memory/628-16-0x00000000056E0000-0x0000000005746000-memory.dmp

    Filesize

    408KB

  • memory/628-21-0x0000000006880000-0x000000000688A000-memory.dmp

    Filesize

    40KB

  • memory/628-20-0x0000000006BB0000-0x0000000006BF0000-memory.dmp

    Filesize

    256KB

  • memory/628-19-0x0000000006850000-0x000000000686E000-memory.dmp

    Filesize

    120KB

  • memory/4132-1-0x0000000074DE0000-0x0000000075591000-memory.dmp

    Filesize

    7.7MB

  • memory/4132-3-0x0000000004D90000-0x0000000004E2C000-memory.dmp

    Filesize

    624KB

  • memory/4132-0-0x0000000000220000-0x0000000000232000-memory.dmp

    Filesize

    72KB

  • memory/4132-2-0x0000000004D80000-0x0000000004D90000-memory.dmp

    Filesize

    64KB

  • memory/4132-8-0x0000000074DE0000-0x0000000075591000-memory.dmp

    Filesize

    7.7MB