(YARA) YARA_Base64
rule golang_base64_enc {
meta:
author = "RussianPanda"
decription = "Detects Base64 Encoding and Decoding patterns in Golang binaries"
reference = "https://unprotect.it/technique/base64/"
date = "1/10/2024"
hash = "509a359b4d0cd993497671b91255c3775628b078cde31a32158c1bc3b2ce461c"
strings:
$s1 = {62 61 73 65 36 34 2e 53 74 64 45 6e 63 6f 64 69 6e 67 2e 45 6e 63 6f 64 65 54 6f 53 74 72 69 6e 67 28 [0-15] 29}
$s2 = {62 61 73 65 36 34 2e 53 74 64 45 6e 63 6f 64 69 6e 67 2e 44 65 63 6f 64 65 53 74 72 69 6e 67 28 [0-15] 29}
$s3 = {69 66 20 65 72 72 20 21 3D 20 6E 69 6C 20 7B}
$s4 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
condition:
all of ($s*)
and uint16(0) == 0x5A4D
}
rule base64_enc {
meta:
author = "RussianPanda"
decription = "Detects Base64 Encoding"
reference = "https://unprotect.it/technique/base64/"
date = "1/10/2024"
hash = "09506d1af5d8e6570b2b7d05143f444f5685d2a9f3304780ef376edf7b2d79e6"
strings:
$s2 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
$s3 = {83 E? 3F}
condition:
all of ($s*)
and uint16(0) == 0x5A4D
}
Associated Techniques
Matching Samples 10 most recent
Sample Name | Matching Techniques | First Seen | Last Seen |
---|---|---|---|
honeypot.exe | 5 | 2024-12-04 | 2 hours, 54 minutes ago |
Xulytaikhoan.xlsx | 14 | 2024-11-26 | 1 week, 1 day ago |
Setup.exe | 5 | 2024-11-25 | 1 week, 2 days ago |
8126a59c84aad134868c842eabc2...204cd859e6322d22ce5a3b937e2a | 5 | 2024-11-19 | 2 weeks, 1 day ago |
8e9583fb455e3381e29e40af8533...833f37f2d6927cb25dde2f3d4085 | 4 | 2024-11-19 | 2 weeks, 1 day ago |
765edfc0c20fa35b84f7b36bf280...87d29cdf96ac9712ee6e05f59056 | 6 | 2024-11-19 | 2 weeks, 1 day ago |
315194f647f925de53ce6f014d64...9fb23070d253276b626a132557e8 | 10 | 2024-11-19 | 2 weeks, 1 day ago |
implant.exe | 6 | 2024-11-18 | 2 weeks, 2 days ago |
KnightOnLine.exe | 7 | 2024-11-17 | 2 weeks, 2 days ago |
chelentano.exe | 5 | 2024-11-16 | 2 weeks, 4 days ago |
Created
January 11, 2024
Last Revised
January 11, 2024