Analysis Summary

GCleaner is a type of malware that disguises itself as a legitimate software program called "GCleaner" or "G-Cleaner." It is typically spread through malicious email attachments or fake software downloads. Once installed on a computer, GCleaner can gather personal information, display unwanted ads, and cause other malicious activity. To avoid the detection by Anti-virus they changed their technique by distributing these malware through crack websites. When these cracks are executed, they emit various payloads. Depending on the country it emits various malware which includes STOP/DJVU ransomware, SmokeLoader, Redline, Amadey, Flicker, and Racoon Stealer. The countries that were mostly targeted were the US, EU, and CA.

It is important to keep your anti-virus software updated and to be cautious when downloading and installing programs, particularly from untrusted sources.

Impact

• Information Theft
• Credential Theft
• Exposure to Sensitive Data

Indicators of Compromise

MD5

• a4d3a4f023f0a4baf0cc2c71730cc738
• b739051cf9cac6187cefb29d092c1fc1
• 933c5ebef538de08a038d980d1c6001c
• 91fd3b84e981072435842c9ec4498d0e
• 92d5a6a856c32cc7e0ae11e5bb4b2d4f
• 3dcb5311eb6b7629271815485a5259ee

SHA-256

• c0e2aebe3df9bf336b27eb540853b8dd9987be95749f4145002b1b4465d3bda1
• 19cafd1420ebb5cb96c1d1ed2c0f9a8f59c95ef90316717c733ce78eb45e72cc
• d6aee306a241b3b165cd50ad39c534ee90aa266ce1d7acdf4bf30313e43ca3ae
• 5fff5f8ae81b7a71be4c1ab4f92b118306685af72ac5ef643e7deb05b2893a51
• abc8791aca686d175c4059f78713272c2da4ccc0897a51505b5ec5eec3e41dab
• 373f1a98cafb50508a6310576eaaf8dff1a3da118a185306fcdb1973b6c7e355

SHA1

• 85e100d745991c9dd5cbedc0c7c9f8381d976688
• 675e27f425ac891419bd438293912c14fdc4dfda
• d9c73c2f27490f2feb54e273387a536847e5a803
• 8691d0cd2b63044685ba6ede30a0e45783b22889
• b962839dd84bc1c15b307de46c3a429410e83594
• 75bd90a4fd2dfe7871d8b280c6d71af8be22e0d1

Remediation

• Block all threat indicators at your respective controls.
• Search for indicators of compromise (IOCs) in your environment utilizing your respective security controls.
• Patch and upgrade any platforms and software timely and make it into a standard security policy. Prioritize patching known exploited vulnerabilities and zero-days.
• Enable antivirus and anti-malware software and update signature definitions promptly. Using multi-layered protection is necessary to secure vulnerable assets.