Analysis

  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-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
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1052
    • 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:812
      • 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:2284
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7DAC.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:5028
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:656
      • C:\Users\Admin\AppData\Roaming\appBroker.exe
        "C:\Users\Admin\AppData\Roaming\appBroker.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:4808

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp7DAC.tmp.bat

    Filesize

    153B

    MD5

    9102efff7ef4c31b72499335be0f937a

    SHA1

    a844934be10de22c97fa655caf31d8435ea6f86e

    SHA256

    d22f703c29826dbce99f5d8650712c2b0cd71c9213ab27fdb4506aaf7f804254

    SHA512

    7423e7e416406c0f3de3a60f03482962c70bc14af0b0110df4c7fcb5f5c549bca66e28c0d59ed318ad163ef50b66dafc4e982b6a36182d2b667a9fd2d608836d

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

    Filesize

    48KB

    MD5

    7fd8581748cdf137023ef96f1286ce0f

    SHA1

    c640bcbbebbe62c2a58235d1e6f9ec7eeb99387a

    SHA256

    0b685b0d52d434ab8311127daa63ae5597f7948d5a73016a1f8211587040b9a6

    SHA512

    bd4c7c3f646e4685fc750f69ca5b9af6d542ee4d22db1b9ae3b379b659d415e3f9895bde81f40448f927662ede5cd87fe0f85234134b519c9aa7900f1b811282

  • memory/1052-0-0x0000000000050000-0x0000000000062000-memory.dmp

    Filesize

    72KB

  • memory/1052-1-0x0000000074A50000-0x0000000075200000-memory.dmp

    Filesize

    7.7MB

  • memory/1052-2-0x00000000049E0000-0x00000000049F0000-memory.dmp

    Filesize

    64KB

  • memory/1052-3-0x0000000004B90000-0x0000000004C2C000-memory.dmp

    Filesize

    624KB

  • memory/1052-9-0x0000000074A50000-0x0000000075200000-memory.dmp

    Filesize

    7.7MB

  • memory/4808-14-0x0000000004D70000-0x0000000004D80000-memory.dmp

    Filesize

    64KB

  • memory/4808-13-0x00000000749B0000-0x0000000075160000-memory.dmp

    Filesize

    7.7MB

  • memory/4808-15-0x00000000056B0000-0x0000000005C54000-memory.dmp

    Filesize

    5.6MB

  • memory/4808-16-0x0000000005100000-0x0000000005166000-memory.dmp

    Filesize

    408KB

  • memory/4808-17-0x00000000064A0000-0x0000000006516000-memory.dmp

    Filesize

    472KB

  • memory/4808-18-0x0000000006520000-0x00000000065BC000-memory.dmp

    Filesize

    624KB

  • memory/4808-19-0x0000000006470000-0x000000000648E000-memory.dmp

    Filesize

    120KB

  • memory/4808-20-0x00000000065C0000-0x0000000006600000-memory.dmp

    Filesize

    256KB

  • memory/4808-21-0x0000000006600000-0x000000000660A000-memory.dmp

    Filesize

    40KB

  • memory/4808-22-0x00000000749B0000-0x0000000075160000-memory.dmp

    Filesize

    7.7MB

  • memory/4808-23-0x0000000006830000-0x0000000006892000-memory.dmp

    Filesize

    392KB

  • memory/4808-24-0x0000000004D70000-0x0000000004D80000-memory.dmp

    Filesize

    64KB