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Severity
Medium
Analysis Summary
Since 2016, FormBook has been active as a data-stealing malware that affects 4% of enterprises in 2020. It tracks and monitors keystrokes, finds and accesses files, takes screenshots, harvests passwords from various browsers, drops files, downloads, and executes stealthier malware in response to orders from a command-and-control server (C2). The cybercriminals behind these email campaigns used a variety of distribution techniques to deliver this malware, including PDFs, Office Documents, ZIP, RAR, etc.
Researchers in Ukraine have observed a mass distribution of emails with the subject “letter of approval of cash security” among state organizations.
“Attached to the e-mail is the XLS file “support letter.xlsx”, the opening of which will activate the macro, which will download and run the malicious program Formbook/XLoader v2.5 (obviously, the content-bait of the document is not relevant for citizens of Ukraine).” – CERT-UA
The credentials and authentication data on the victim’s system is then stolen and sent to the attacker’s server.
Impact
- Credential Theft
- Sensitive Data Theft
- Keystroke Logging
Indicators of Compromise
Domain Name
- gobits3[.]com
- humamzarodi[.]info
- phy[.]wiki
- londonkhaboos[.]com
- robostetics[.]com
- bryanheritagefarm[.]com
- writingdadsobituary[.]com
- clublebron[.]com
Filename
- support letter[.]xlsx
- vbc[.]exe
- formbook[.]exe
IP
- 103[.]167[.]92[.]57
MD5
- 93feeeab72617e4f5630fd79f2fdd4b6
- 95d60664267d442e99c41e2aa3baff68
- 5a2c58b9ad136ecaea903e47ca7d0727
SHA-256
- 7d39e6ca46c053c1ad744de1ca8867217596bb17bb673785eb8827b00c5ae05b
- b5f79bb30d60794b7edbf486fa96a11c1ac3ba34592a496379020e8379f281be
- c6e2c85f3896730280303e181754cb01f53f885729dbc7a09a144e6e53917648
SHA-1
- 5f009b5cb00f71644b4ba97beca8184cfd51f97b
- 6b8d7ac057a4d13c6b9e5a0fea0a710afc9eaec2
- 1eb728f65d8da7c4944bd1e6308249d9f1eabf32
URL
- http[:]//103[.]167[.]92[.]57/xx_cloudprotect/vbc[.]exe
Remediation
- Block all threat indicators at your respective controls.
- Search for IOCs in your environment.