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Severity
Medium
Analysis Summary
Since 2019, Guloader has been in operation as a downloader. GuLoader spreads through spam campaigns with malicious archived attachments. GuLoader downloads the bulk of malware, with the most frequent being AgentTesla, FormBook, and NanoCore. The encrypted payloads of this downloader are usually saved on Google Drive. It also got its payloads from Microsoft OneDrive and websites that were controlled by an attacker. GuLoader can avoid network-based detection by using genuine file-sharing websites, which aren’t often filtered or inspected in corporate contexts.
Impact
- Information Theft
- Security Bypass
Indicators of Compromise
MD5
- d4ff0a9964938e044304812adacfceab
- e184b31478de1db5b3427a589bac2573
- 21d9fd5a0644c27d57f9b39cec04d780
- c5e59279d16c659897d63c7750b4e1fc
- 6b9e17ba88b41e3b69f285e11578425a
SHA-256
- d36c02ac32fab4990a899358293dd46fc737903d84929282520ea74db8bf46f1
- 41689d4f0e8760219c0d3cbcc42b9ddcf4605a0ca468857825057007815e02b2
- 0aab4343050be7f37c913fe5809888d026fc0843ef1b35b2ca4a719d9b201450
- 95dc8071f2c25cf5373b17d935d2dd1658dcc381356ded3dd0caf8368d080db6
- c59468ace2e43ed63f461ef2f41591db54cf4cfa227640131831ea73a1149198
SHA-1
- 170773df3fa9eaa9559c76d0710586a8e56a6af8
- 4187767f6a8f697ee879ad85a498dacce449a177
- f0162cea5e4c1677c3837431b15e79889ea7b204
- 5ccba87a3d575a71b02b0501141d28855021b857
- 53568f381b6a98ce6df671a0e48c95b16d6bd8c3
Remediation
- Search for IOCs in your environment.
- Block all the threat indicators at your respective controls.