Resubmissions

31-05-2021 12:55

210531-5j3tfy65pn 10

31-05-2021 12:08

210531-83jrfbhyba 10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    31-05-2021 12:08

General

  • Target

    Statement SKBMT 09418.exe

  • Size

    993KB

  • MD5

    16fdc46350203434497e1741ea5cd20a

  • SHA1

    f75824509e9ce1b77194724fd34c60bc0c9d28f1

  • SHA256

    1018d102af9093b9a03abe9a660360db6be8f752d992bb7159475fccd78949f5

  • SHA512

    a71d6af40387a94c52d54438fea392969f5f0a330867dc7a2d05de5c07fdfb26724270ca3bbbfaf1ceddd2338254eb158e9ada092fa622315627f0b0553fee12

Malware Config

Signatures

  • A310logger

    A310 Logger is a .NET stealer/logger targeting passwords from browsers and email clients.

  • StormKitty

    StormKitty is an open source info stealer written in C#.

  • StormKitty Payload 2 IoCs
  • A310logger Executable 2 IoCs
  • Reads local data of messenger clients 2 TTPs

    Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Statement SKBMT 09418.exe
    "C:\Users\Admin\AppData\Local\Temp\Statement SKBMT 09418.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1748
    • C:\Users\Admin\AppData\Local\Temp\Statement SKBMT 09418.exe
      "C:\Users\Admin\AppData\Local\Temp\Statement SKBMT 09418.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1640
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe"
        3⤵
        • Checks processor information in registry
        PID:456

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/456-70-0x0000000000400000-0x0000000000418000-memory.dmp

    Filesize

    96KB

  • memory/456-71-0x0000000000412452-mapping.dmp

  • memory/456-74-0x0000000000330000-0x0000000000331000-memory.dmp

    Filesize

    4KB

  • memory/1640-66-0x00000000004024E0-mapping.dmp

  • memory/1640-65-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1640-69-0x00000000757E1000-0x00000000757E3000-memory.dmp

    Filesize

    8KB

  • memory/1640-73-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1748-59-0x0000000000130000-0x0000000000131000-memory.dmp

    Filesize

    4KB

  • memory/1748-61-0x00000000003B0000-0x00000000003B4000-memory.dmp

    Filesize

    16KB

  • memory/1748-62-0x0000000004740000-0x0000000004741000-memory.dmp

    Filesize

    4KB

  • memory/1748-63-0x0000000005000000-0x0000000005092000-memory.dmp

    Filesize

    584KB

  • memory/1748-64-0x0000000002170000-0x00000000021C4000-memory.dmp

    Filesize

    336KB