Analysis Summary

CryptBot - a Windows malware - is capable of stealing credentials for browsers, cryptocurrency wallets, browser cookies, and credit cards, and creates screenshots of the infected system. Cryptbot hides within legitimate software to be installed by its victims. CryptBot threat actors spread malware via websites purportedly offering software cracks, key generators, or other tools. To gain widespread visibility, threat actors utilize search engine optimization to position malware distribution sites toward the top of Google search results, resulting in a steady stream of potential victims. It can also spread through a fake VPN client which is called Inter VPN, when executed, it infects the system with Cryptbot and Vidar which then runs an AutoHotKey script leading to download executables from malicious websites.

Impact

• Credential Theft
• Information Theft
• Exposure of Sensitive Data

Indicators of Compromise

MD5

• 28dafbd5b274c30c0578e76ec956c109
• d8c306be8b162d1bac121505807854c2
• 327e4bd70e2906769929a778b0bcd154
• 9fac753db5ec1b01d51c6f073dec122d
• 7599ea7a23c0b0d9ecb7c895e9f8cfdb

SHA-256

• 326295c61c33a5e9bdd5d3d3e220f698ac13240093236c8f75d3eea7cf9d9206
• e5326d1008ed401c53b3ad6629a7b7dbac5de87bec42a0120f58b82a9e4b9e86
• b34f8c961602120e9e73cae2cc5acd563bf8069760b18ce81e6eecdd22658601
• 82ef038b58bc0dddf3e68504906f8e1c85ea32910d726231b6008cdecff175c3
• 4036ab3fa5a19cdc1064ad55047dd766ea21cb1ffd4f1e4fa037eb29fa813fb2

SHA1

• e43a71adb7f9ad93e65a00c175eb91d0b30507fe
• e4a51b11e25647c593d20fa21b63d9a2ae9aa05a
• 3c585820793d95d83246ae07d14c27573fac2995
• f25a035618b6a391375e7a4ffd43d96cfe06df36
• ebc13af0137dd53f8275ff41990ae86fc32a0b10

Remediation

• Block all threat indicators at your respective controls.
• Search for indicators of compromise (IOCs) in your environment utilizing your respective security controls.
• Enable antivirus and anti-malware software and update signature definitions promptly. Using multi-layered protection is necessary to secure vulnerable assets.
• Do not download documents attached in emails from unknown sources and strictly refrain from enabling macros when the source isn’t reliable.