Rewterz Threat Alert – CaddyWipper Ransomware – Active IOCs

Severity

Medium

Analysis Summary

CaddyWiper is another destructive data wiper suspected to be targeting Ukraine. The wiper, which erases user data and information from associated drives, was discovered on several systems in a limited number of companies. By overwriting the data with a NULL value, CaddyWiper removes all files under C:\Users as well as all files under accessible discs from D: to Z:.
If the size of the target file exceeds 0xA00000 bytes (10MB), it only wipes the first 0xA00000 bytes. CaddyWiper shares no code similarities with HermeticWiper or IsaacWiper, the other two new data wipes that have infected Ukrainian organizations. However, this wiper has a tactical overlap with HermeticWiper as it was deployed via the Windows domain controller, implying that the attackers had gained control of the Active Directory server.

Impact

• Data Exfiltration
• Credential Theft
• Financial Loss

Indicators of Compromise

MD5

• 728f13a93b62699e8f94f2d14a989bac
• ea4c9133ebdfaab33fb22e5b559f5bfa
• 42bdac800cc66c1dd5f78b0168a2a7fc

SHA-256

• b66b179eac03afafdc69f62c207819eceecfbf994c9efa464fda0d2ba44fe2d7
• 9d83817f7cae01554f77680ed7e6698966bcf020915c0dc411e5d57f6eea6ed4
• 5cc51f29c6074d9741d6e68bcf9ce8363d623437ea11506a36791b4763cefdc7

SHA1

• 776e573676406e2311de0b40b9f2e98fd5b1fc4d
• c648330911f64df9b3e8eebb53891361a64c09c5
• 51ac19ec006b1e565c732d8940f32160ecff0983

Remediation

• Block all threat indicators at your respective controls.
• Search for IOCs in your environment.