Overview

overview

10

Static

static

3

08734899.exe

windows7-x64

10

08734899.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    145s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09/06/2023, 06:54

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General

  • Target
    08734899.exe
  • Size 232KB
  • Sample230609-hpfdvaca2v
  • SHA256 1dacdc296fd6ef6ba817b184cce9901901c47c01d849adfa4222bfabfed61838
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
chimeraransomwarespywarestealer

Malware Config

Signatures

  • Chimera 64 IoCs

    Ransomware which infects local and network files, often distributed via Dropbox links.

    ransomwarechimera
  • Chimera Ransomware Loader DLL 1 IoCs

    Drops/unpacks executable file which resembles Chimera's Loader.dll.

    ransomware
  • Renames multiple (4256) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • Modifies extensions of user files 3 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Drops desktop.ini file(s) 27 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Drops file in Program Files directory 64 IoCs
  • Modifies Internet Explorer settings 1 TTPs 38 IoCs
    adwarespyware
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\08734899.exe
    "C:\Users\Admin\AppData\Local\Temp\08734899.exe"
    1⤵
    • Chimera
    • Modifies extensions of user files
    • Drops desktop.ini file(s)
    • Drops file in Program Files directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1664
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" -k "C:\Users\Admin\Music\YOUR_FILES_ARE_ENCRYPTED.HTML"
      2⤵
      • Modifies Internet Explorer settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2880
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2880 CREDAT:17410 /prefetch:2
        3⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:4768

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        YOUR_FILES_ARE_ENCRYPTED.HTML
        • Path C:\Program Files\Java\jdk1.8.0_66\jre\YOUR_FILES_ARE_ENCRYPTED.HTML
        • Size 4KB
        • SHA256 0a3ffe6d7b3eeeb2e4881033ddd5678259abd5773a9c147465c30c61f904177c
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
        • Size 471B
        • SHA256 1455f3acd9f00c4a3d7fac6caf8566bdffb868aec09f86fea8acc17a525b6c72
        • MD5 SHA1 SHA512
        Submit Download

        7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
        • Size 404B
        • SHA256 41d0ee07ad3e6aea5d9356ecb5c3e4a20e58cc3b4e2393aab98fbfd6852fb6c4
        • MD5 SHA1 SHA512
        Submit Download

        suggestions[1].en-US
        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\UUIKWEAJ\suggestions[1].en-US
        • Size 17KB
        • SHA256 c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        YOUR_FILES_ARE_ENCRYPTED.HTML
        • Path C:\Users\Admin\Favorites\Links\YOUR_FILES_ARE_ENCRYPTED.HTML
        • Size 4KB
        • SHA256 0a3ffe6d7b3eeeb2e4881033ddd5678259abd5773a9c147465c30c61f904177c
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        YOUR_FILES_ARE_ENCRYPTED.HTML
        • Path C:\Users\Admin\Favorites\YOUR_FILES_ARE_ENCRYPTED.HTML
        • Size 4KB
        • SHA256 0a3ffe6d7b3eeeb2e4881033ddd5678259abd5773a9c147465c30c61f904177c
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        YOUR_FILES_ARE_ENCRYPTED.HTML
        • Path C:\Users\Admin\Music\YOUR_FILES_ARE_ENCRYPTED.HTML
        • Size 4KB
        • SHA256 0a3ffe6d7b3eeeb2e4881033ddd5678259abd5773a9c147465c30c61f904177c
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/1664-133-0x0000000010000000-0x0000000010010000-memory.dmp
        Download

        memory/1664-138-0x0000000001240000-0x0000000001250000-memory.dmp
        Download

        memory/1664-139-0x00000000050E0000-0x00000000050FA000-memory.dmp
        Download

        memory/1664-795-0x0000000001240000-0x0000000001250000-memory.dmp
        Download