Analysis

  • max time kernel
    4294183s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20220223-en
  • submitted
    06-03-2022 12:45

General

  • Target

    cleaner.exe

  • Size

    4.3MB

  • MD5

    ef8385f6ccc6dc6aa6fa9833e13c1cf3

  • SHA1

    2fe6c0b8cef78d409d29fbd0d1260f39874b068e

  • SHA256

    5b8d0e358948f885ad1e6fa854f637c1e30036bc217f2c7f2579a8782d472cda

  • SHA512

    2efe1baab3b815baf2f45acca6afc3e2692cb2fa7e4806515f4376a43ad17f474551dcee87c03f65fe99ca553c79140ba6d35193753800bbeb0e3c27f2a9bbeb

Malware Config

Extracted

Family

blackguard

C2

https://api.telegram.org/bot1840568117:AAGlvKQeSfXkObSE7__yYc5jM9o8qSrkFUw/sendMessage?chat_id=1039923904

Signatures

  • BlackGuard

    Infostealer first seen in Late 2021.

  • Downloads MZ/PE file
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Program crash 1 IoCs
  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\cleaner.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1980
    • C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1980 -s 1936
      2⤵
      • Program crash
      PID:1228

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1980-54-0x0000000000C20000-0x000000000106C000-memory.dmp

    Filesize

    4.3MB

  • memory/1980-55-0x000007FEF50C0000-0x000007FEF5AAC000-memory.dmp

    Filesize

    9.9MB

  • memory/1980-56-0x000000001B5C0000-0x000000001B5C2000-memory.dmp

    Filesize

    8KB

  • memory/1980-57-0x000000001AA60000-0x000000001AAD6000-memory.dmp

    Filesize

    472KB

  • memory/1980-58-0x000000001B1B0000-0x000000001B25A000-memory.dmp

    Filesize

    680KB

  • memory/1980-59-0x000000001B010000-0x000000001B074000-memory.dmp

    Filesize

    400KB