Rewterz Threat Alert – WannaCry Ransomware – Active IOCs

Severity

High

Analysis Summary

WannaCry’s rapid spread, enabled by its implementation of a Windows vulnerability stolen from an intelligence agency, was suddenly halted when security researchers registered an internet domain name embedded in the code – a routine research procedure that, inadvertently, tripped a “kill switch” subroutine in the malware, causing it to stop infecting computers. A small number of variants released in the following days, using new kill switch domains, were shut down using the same method. By the time the kill switch domain had any effect, the malware had already wrought a lot of destruction. But the kill switch, surprisingly, didn’t mean an end to WannaCry, even though WannaCry was updated and re-released only twice a few days after the first infection. In fact, WannaCry detection appear to be at an all-time high, surpassing the number of detection of older worm malware such as Conficker. The malware continues to infect computers worldwide.

Impact

• File encryption

Indicators of Compromise

MD5

• 84c82835a5d21bbcf75a61706d8ab549
• fd5f8668d69cdd2016ad133974600f24
• 84c82835a5d21bbcf75a61706d8ab549
• efe76bf09daba2c594d2bc173d9b5cf0
• 2b48a8fe634a9aca2e65f126b0386dba
• db349b97c37d22f5ea1d1841e3c89eb4

SHA-256

• ed01ebfbc9eb5bbea545af4d01bf5f1071661840480439c6e5babe8e080e41aa
• 29f8970755c6a6ffa80b9513f71f6dcf425f9ea39f067ffdb83f6aca531ce78b
• ed01ebfbc9eb5bbea545af4d01bf5f1071661840480439c6e5babe8e080e41aa
• 707a9f323556179571bc832e34fa592066b1d5f2cac4a7426fe163597e3e618a
• 3010ece40dd23acab3b2202b0901f398385387c53eb2f003e501606b50bb94ef
• 24d004a104d4d54034dbcffc2a4b19a11f39008a575aa614ea04703480b1022c

SHA-1

• 5ff465afaabcbf0150d1a3ab2c2e74f3a4426467
• 41c890bbfff9269140c6e70d17c488cc63d034cb
• 5ff465afaabcbf0150d1a3ab2c2e74f3a4426467
• ba5de52939cb809eae10fdbb7fac47095a9599a7
• 96469af9a7c3a0534c5608c9808245262daaa49c
• e889544aff85ffaf8b0d0da705105dee7c97fe26

URL

• https[:]//www[.]google[.]com
• http[:]//www[.]iuqerfsodp9ifjaposdfjhgosurijfaewrwergwea[.]com/

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