MalwareBazaar Database

c4ffeine

Foxveil 'cc2' build Mach-O, the ELEVENTH payload served from this one unchanged URL (fat x86_64+arm64, 905,200 B), fetched via Tor 2026-09-21 00:37:14 UTC, origin build time 00:01:43, 3 hours 0 minutes after the previous build. The origin is nginx, so each build time is readable from the ETag: the payloads served behind this URL were stamped 2026-09-20 07:02:41, 09:02:47, 11:03:28, 14:01:46, 15:02:41, 16:02:02, 20:05:52, 21:01:38 and 2026-09-21 00:01:43 UTC. The job skips hours rather than running on a fixed interval, and the gaps measured so far run from 55 minutes to 4 hours 3 minutes. Hash sequence on the same URL: a3dabccd14492f4c70658ece96a3ed7b4e275ff9d70c434298bd6f863d1e24b9 (987,264 B, 2026-09-18), ec780ca8df9d10df905f3f77641f88ece7651303843802c37a57c484c6251a42, 610ae82d0d872334ba68718030bdeb0c2d23ce592b4c9022fbb225b0208b884a, 233fd2c05865e6fc7034e61bf98e64f7afeb24c1b3e88539895eeff764ebb740, 336f4bf8eb4d76c91f936beabe3a061b43db46d2cc85e6dc82dd22f9194191fc, 8e7d88f5adef0f2706fbc6df433e3c76d81c4b799389319e60a4639fc1c088a1, f03b8beef33330786b3f3f12e2bf2c352d4f14b8e6d5a78180205c7cccdcefb7, 6f994814774412107510aede65422e66c1e825f57bd3ae5d0f173aa2c54893d5, a2da9aba412172006b2ba30e2168ec030dabcdf8c46e6895ffba1c26834251a6, 382a3e22d91b93c67de463fde451870620e661b8e96f40a4ece80a2d3543a03f (921,696 B, 2026-09-20 21:01:38), then this one. The stage-1 zsh dropper at the same host has stayed byte-identical since 2026-09-18 12:56:51 (sha256 6e753133e537264247a08587d87b30b8d9a96caea1d6cc92d41fc8058073b8f7) and was re-checked unchanged at this fetch: the delivery chain is fixed and only the payload rotates, which is why every build in this series arrives at 0 detections. Earlier builds in the series were unpacked statically and each held the same AMOS AppleScript stealer, with the same 47 handlers, hosts and persistence, decrypted with a key derived from the SHA-256 of the loader's own __text section, so each repack rekeys itself. What rotates is the wrapper: obfuscation volume, PBKDF2 iteration count, encrypted item count and table layout, tokens and the ad-hoc code signing identity. Against the previous build this one carries 41,381 arm64 instructions across 40 __text functions where that one carried 45,124 across 42, and a TLSH comparison of __text scores 54, inside the band measured across every earlier build of this family. The encrypted payload table holds 66 items totalling 195,928 bytes of plaintext against 70 items and 192,828 bytes in the previous build, a 1.6 percent move consistent with the same script re-chunked. Host answers HTTP 200 only to a curl User-Agent; browser User-Agents get a Cloudflare 520 on every path including the root. Not executed.