Rewterz Threat Advisory – CVE-2019-1040 – Windows NTLM Tampering Vulnerability
June 18, 2019Rewterz Threat Advisory – CVE 2019-11707 – Mozilla Firefox Vulnerability Exploited In the wild
June 19, 2019Severity
Medium
Analysis Summary
TA505 threat group campaign that masquerades as email from “National Tax Inspectorate for interrogation”.
The initial point of infection sources from an email with the subject “National Tax Code”. Example email:
This spreadsheet contains malicious macros that, once enabled, download and execute the first stage malware “wiskkk.exe”. This executable downloads and executes winserv.exe, the final stage malware, also known as RMS (Remote Manipulator System). RMS is a known remote administration tool by TektonIT and allows complete access to the target system.
Impact
Unauthorized system access
Indicators of Compromise
IP(s) / Hostname(s)
217[.]12[.]201[.]159
Malware Hash (MD5/SHA1/SH256)
- 107DE953B02FB0DD7E31A0B618C3748F2C285070577EF1ABAABEB30AB3153424
- 4423A6B64B8C483B802065A0D14CB21BBFCD3E2D
- 9FDE87763E721EA2EBDAE8AA4C3F6B53
- FD701894E7EC8D8319BC9B32BBA5892B11BDF608C3D04C2F18EFF83419EB6DF0
- 5310C2397BA4C783F7EE9724711A6DA9B5C603B5C9781FFF3407B46725E338B3
- 609B0A416F9B16A6DF9B967DC32CD739402AF31566E019A8FB8ABDF3CB573E30
- 2116152E47309F8A15DC03A417CEF57F
- 0C19E196ACA45CF5CB7CB251498BACC4
- D0FCD4DAEE0BE452884C7FB926A7164F
- 51907D72DFF06693CE403F5A0205126F
- e900a8eafd9449439ad5d8f2032758a5
Email Subject
National Tax Code
Filename
- Documentation-00589019.zip
- document_june2019.zip
- Privat_06.2019.zip
- Personal-0059062019.zip
Remediation
- Block all threat indicators at your respective controls
- Always be suspicious about emails sent by unknown senders
- Never click on the link attachments sent by unknown senders