Analysis

  • max time kernel
    140s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    22-02-2022 08:58

General

  • Target

    3c39836dedf6779a0207819c72238fa5.exe

  • Size

    671KB

  • MD5

    3c39836dedf6779a0207819c72238fa5

  • SHA1

    07433edf63057fff1e96ddbf5249aa2c50f69dbd

  • SHA256

    34694c57b7447b59d6bc6a2dba635fa320a4d4b1e550a36840fe1f2208b76d87

  • SHA512

    f8a6810abf551f01aae3a8d7c2e6a3421aac3f0312301a5e12a28bfe9490ae064f5c8dd846113cf755a3d9b8f22b80f92b27ec6e4590b04a1629662f472a7086

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

1

C2

212.193.30.54:8755

Mutex

gyQ12!.,=FD7trew

Attributes
  • anti_vm

    false

  • bsod

    false

  • delay

    3

  • install

    false

  • install_folder

    %AppData%

  • pastebin_config

    null

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers.

  • Async RAT payload 4 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3c39836dedf6779a0207819c72238fa5.exe
    "C:\Users\Admin\AppData\Local\Temp\3c39836dedf6779a0207819c72238fa5.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:984
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      2⤵
        PID:332

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Credentials in Files

    1
    T1081

    Collection

    Data from Local System

    1
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/332-63-0x0000000000400000-0x0000000000412000-memory.dmp
      Filesize

      72KB

    • memory/332-62-0x0000000000400000-0x0000000000412000-memory.dmp
      Filesize

      72KB

    • memory/332-67-0x0000000004DA0000-0x0000000004DA1000-memory.dmp
      Filesize

      4KB

    • memory/332-66-0x0000000076451000-0x0000000076453000-memory.dmp
      Filesize

      8KB

    • memory/332-65-0x00000000745BE000-0x00000000745BF000-memory.dmp
      Filesize

      4KB

    • memory/332-59-0x0000000000400000-0x0000000000412000-memory.dmp
      Filesize

      72KB

    • memory/332-61-0x0000000000400000-0x0000000000412000-memory.dmp
      Filesize

      72KB

    • memory/332-60-0x0000000000400000-0x0000000000412000-memory.dmp
      Filesize

      72KB

    • memory/332-64-0x0000000000400000-0x0000000000412000-memory.dmp
      Filesize

      72KB

    • memory/984-54-0x0000000001240000-0x00000000012EE000-memory.dmp
      Filesize

      696KB

    • memory/984-55-0x00000000745BE000-0x00000000745BF000-memory.dmp
      Filesize

      4KB

    • memory/984-58-0x0000000000790000-0x00000000007DC000-memory.dmp
      Filesize

      304KB

    • memory/984-57-0x0000000001180000-0x0000000001181000-memory.dmp
      Filesize

      4KB

    • memory/984-56-0x00000000010D0000-0x000000000116E000-memory.dmp
      Filesize

      632KB