

Rewterz Threat Advisory – CVE-2019-1955 – Cisco Email Security Appliance Header Injection Vulnerability
September 27, 2019
Rewterz Threat Alert – Konni’s APT Group Runs Malspam Campaigns
September 30, 2019
Rewterz Threat Advisory – CVE-2019-1955 – Cisco Email Security Appliance Header Injection Vulnerability
September 27, 2019
Rewterz Threat Alert – Konni’s APT Group Runs Malspam Campaigns
September 30, 2019Severity
Medium
Analysis Summary
A new malware loader being used to deliver and infect systems with a previously undocumented malware payload called Divergent. This threat uses NodeJS — a program that executes JavaScript outside of a web browser — as well as the legitimate open-source utility WinDivert to facilitate some of the functionality in the Divergent malware. The use of NodeJS is not something commonly seen across malware families.
The observed malware campaigns associated with Divergent feature the use of persistence techniques most commonly associated with “fileless” malware. This malware can be leveraged by an attacker to target corporate networks and appears to be primarily designed to conduct click-fraud. It also features several characteristics that have been observed in other click-fraud malware, such as Kovter.
Impact
Exposure of sensitive information
Indicators of Compromise
URLs
- hxxps[:]//1292172017[.]rsc[.]cdn77[.]org/images/trpl[.]png
- hxxps[:]//1292172017[.]rsc[.]cdn77[.]org/imtrack/strkp[.]png
Malware Hash (MD5/SHA1/SH256)
- ba04eacaa80bb5da6b02e1e7fdf3775cf5a44a6179b2c142605e089d78a2f5b6
- a82dd93585094aeba4363c5aeedd1a85ef72c60a03738b25d452a5d895313875
- 2f4a9ef2071ee896674e3da1a870d4efab4bb16e2e26ea3d7543d98b614ceab9
- 77498f0ef4087175aa85ce1388f9d02d14aaf280e52ce7c70f50d3b8405fea9f
- b2d29bb9350a0df93d0918c0208af081f917129ee46544508f2e1cf30aa4f4ce
- bf2cdd1dc2e20c42d2451c83b8280490879b3515aa6c15ab297419990e017142
- ba04eacaa80bb5da6b02e1e7fdf3775cf5a44a6179b2c142605e089d78a2f5b6
- a7656ccba0946d25a4efd96f4f4576494d5f1e23e6ad2acc16d2e684656a2d4f
- 607b2f3fd1e73788a4d6f5a366c708dbb12d174eba9863ade0af89ca40e1fdba
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.