MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 66a39ad4e53d93de95c3db38822fb265dcc8835328d591edaf3bbbe5098f391f. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.
Database Entry
AMOS
Vendor detections: 9
| SHA256 hash: | 66a39ad4e53d93de95c3db38822fb265dcc8835328d591edaf3bbbe5098f391f |
|---|---|
| SHA3-384 hash: | 224dc75f14ff27c502072c2eeeb92d28436ea783db08a01b5ec382902f48917de34575571b36bb5bce6f9d6ceab089ba |
| SHA1 hash: | 995ae2f71ae2a10348008eb18d7c1c587b2ec461 |
| MD5 hash: | 146a1bd3fe055ea18383e271d587bf9a |
| humanhash: | california-south-finch-jig |
| File name: | macho_66a39ad4e53d.bin |
| Download: | download sample |
| Signature | AMOS |
| File size: | 1'790'864 bytes |
| First seen: | 2026-10-21 00:07:59 UTC |
| Last seen: | Never |
| File type: |  macho |
| MIME type: | application/x-mach-binary |
| ssdeep | 24576:5rXzFcpyCzEuHM1nsPlHta0NWqLJxFuMlOYyaKGyIC0SDVqgrpl1ok5YKxj9fOmI:9/CpHUsHbuaKGyXVDQelLS |
| TLSH | T1F985F1903EF9125AE4952433CC045F5694A0A7B1BE0CA9E4AE2187076D396D3FEFB713 |
| TrID | 69.8% (.DYLIB) Mac OS X Mach-O universal Dynamically linked shared Library (32500/1/5) 15.0% (.O/DYLIB/BUNDLE) Mac OS X Universal Binary (generic) (7002/2) 15.0% (.CLASS) Java bytecode (7001/2/1) |
| Magika | macho |
| Reporter |  c4ffeine |
| Tags: | AMOS ClickFix Foxveil Loader Mach-O machO macOS |
c4ffeine
Foxveil 'frame' build Mach-O, the SIXTY-SIXTH payload served from this one unchanged URL (fat x86_64+arm64, 1,790,864 B), fetched via Tor 2026-10-21 00:02:20 UTC, origin build time 00:02:09, 59 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 2026-10-17 10:02:09, 17:02:15, 18:02:09, 19:02:16, 20:02:09, 2026-10-18 00:02:07, 18:02:10, 19:02:17, 20:02:09, 22:02:07, 23:02:12, 2026-10-19 00:02:08, 04:02:08, 05:02:15, 07:02:15, 08:02:08, 09:02:15, 10:02:07, 11:05:52, 12:02:09, 13:02:14, 15:02:13, 16:02:11, 17:02:16, 18:02:07, 19:02:14, 21:02:13, 22:02:07, 23:02:13, 2026-10-20 00:02:09, 01:02:13, 02:02:08, 04:02:08, 05:02:15, 06:02:08, 07:02:14, 09:02:16, 11:02:13, 12:02:07, 13:02:15, 14:02:08, 15:02:14, 16:02:10, 17:02:12, 18:02:10, 19:02:12, 20:02:08, 21:02:14, 22:02:10, 23:02:16 and 2026-10-21 00:02:09 UTC. The job skips hours rather than running on a fixed interval, and the gaps measured so far run from 56 minutes to 7 hours. Hash sequence on the same URL: efc0f30e9b1c8e4b1479006ecdcc95d5d4fa0627af8b294a6babe57da17b58d3 (1,971,168 B, 2026-10-17 10:02:09), e6b9564cb4d675439cf08d0e16f997e7ccaed8f9b2021170ce8f1354dcada775 (1,873,168 B, 2026-10-17 17:02:15), 29db561e83c9f2d88fab3b27f1c156a0c95481bb3c17fe0a357878ae599f8523 (2,070,720 B, 2026-10-17 18:02:09), 5e4af631dbaf78d4ec26d83923b281a8877b9b5ced30fe79f34bb62ded7511f4 (2,103,040 B, 2026-10-17 19:02:16), 5be067bb27c2387242d019b646823fd30593ca8c12319fee316fd105aaf0560f (2,036,576 B, 2026-10-17 20:02:09), 352ffb415be0af66eef67b52b58d40b571731eae62c2082a8a1968e5fe691669 (2,070,320 B, 2026-10-18 17:02:15), 49e5d9301ec4b2646c9d0a20a1abdf2012dbdf0b27a3703a96edcfe6d675386e (1,955,808 B, 2026-10-18 18:02:10), ed8bc2b4ab3d52999ecd782cddc6b43fd87a07c086e1a1285ac44a70ee55603f (2,152,496 B, 2026-10-18 19:02:17), 597dd4fff251b3f37645ad62ad3f55501e276f92c6e1c4ff0cc0da2a2af2be92 (2,086,912 B, 2026-10-18 20:02:09), f50843c01ba9df306195220951c450a19d7e45ea4d8de1e6e236378f993dbc39 (1,807,584 B, 2026-10-18 22:02:07), c38331101cf07b7fa2e38b4792752797e62fd16b86eb57192a06e4eae21752c2 (1,742,368 B, 2026-10-18 23:02:12), 69d926b0626ab14317f3c5b8c5f539c77a76158a5f050b50a0b10eadb8b164dd (1,988,640 B, 2026-10-19 03:02:15), b5052707fbecd8647b4f13026df1b0cb8b54b7e652d517d14aa418e9c241b7d7 (1,710,016 B, 2026-10-19 04:02:08), abceffeeb0d5c7e572763b6b7e7136ee1a8e10a6cc3c7e45d2f321196d65770f (2,168,240 B, 2026-10-19 05:02:15), 8307fed342006ade508c2b883ee7b646afc80e6866ad5f91bcc79c7396995184 (2,053,856 B, 2026-10-19 07:02:15), 1d29cab44ec5ea5ad52581a71bfb5b1aae2faa8be991a67956b9b8afdc4660ac (1,955,168 B, 2026-10-19 08:02:08), 6190326ce3efab6fb4f8084d58dc406dbba7301b675cb6038ea2610ff5af773d (2,135,216 B, 2026-10-19 09:02:15), 1b09e3d4b4bd9dd016a6c5f70058e064bc94d363a245d8ca802416cf27cf4d08 (1,824,112 B, 2026-10-19 10:02:07), 550c73c949cf8d4c807561a351aff9cd29fc337c4564c4dc9aef46c58d127aa4 (1,906,720 B, 2026-10-19 11:05:52), 14b66ae83d87d0ee0119be181af7b31a3a635a4c6cb9a4e28625de1e081e0ffb (1,775,120 B, 2026-10-19 12:02:09), a54a74a4a83f4985581b83d1d23b923f13f65622dcfccd9cee1a24e1e54d704e (2,070,304 B, 2026-10-19 13:02:14), 59a291639201ae60614e01eaf86963e9c6dca8462ec2f260239b904f54007ba1 (2,037,680 B, 2026-10-19 15:02:13), c430f199f0942ea3ec8111183707e2d06be074d913aef8f48dbba6cb387bdbca (2,283,296 B, 2026-10-19 16:02:11), 11484bb1f1d41ba4a2dd18b15f519663c973d11efad02d76ba71a30bb095187d (2,152,528 B, 2026-10-19 17:02:16), efe8d5bcbd743da6c09c87f0897d78630f087cc1347cb6d4796d3e81d2d00c22 (1,659,680 B, 2026-10-19 18:02:07), 36e8a6ec8e4a8bd397e51e55b9fc970d9a3b768fdd66e6b89913492ccbc6023e (1,971,904 B, 2026-10-19 19:02:14), 28b34e7fe74ecf775a5b15fe1e75a22138d9c68829156c134b19d48e568f2046 (1,889,824 B, 2026-10-19 21:02:13), d5be1603c8a1fc0c0984d4ecb9e4d74b488bc79ad058f4606809c284a937368c (1,774,880 B, 2026-10-19 22:02:07), f34500a7e65e36f852c2e53f980bd66d8390b16472082ef231a00195ea364709 (1,840,800 B, 2026-10-19 23:02:13), 392070b982e06331e6daaa38cc8bd713b6f47b5f884d2973a908b6190cf44d90 (2,152,000 B, 2026-10-20 00:02:09), 48b459aa71abce3bced9fc970e798f5f4652b3771f1db6e5e454596f3261831f (1,954,224 B, 2026-10-20 01:02:13), 3783de51bd31420e5b2544e052058efe6d3330938831523e454856c257fef444 (1,921,968 B, 2026-10-20 02:02:08), a826a65769a7f599aad01f0d2022ab969733e04be9d1134face4cba818e730fa (1,872,528 B, 2026-10-20 04:02:08), 4f5df844bce06a3a66e303e877a2c4a116895199a55a4e370096a8a09035a658 (2,021,104 B, 2026-10-20 05:02:15), b524ef748173e2e69771e66a266033dee4476287e86080abf752d0ce12b7d664 (1,906,352 B, 2026-10-20 06:02:08), f000b4e228b5210bcbf558478cf19e477393248f10b37f62893372e5faccb975 (1,939,328 B, 2026-10-20 07:02:14), d3f3f3d8a4a8a1e5973646bfb2f0f09c899d8fc6530bc67ab509e62002e11deb (2,020,784 B, 2026-10-20 09:02:16), ca5fe22a25ba07d8d233e9fd45cd537630e76227654e8db3a9f631b45fa8efdd (1,709,264 B, 2026-10-20 11:02:13), aa91f49965bcf705f1f6912614ef0c2c5febbf00dcd08309e8a151c8be274ce9 (1,692,512 B, 2026-10-20 12:02:07), 3986810671e08738037a4cf966b01ccd52df4eb4a3761a8bf39a50db7ab24bd7 (2,069,904 B, 2026-10-20 13:02:15), 390551f7c71fbc986a7d37351801a3b31c182a6103b7370c6e64ff27bd763ad3 (2,102,880 B, 2026-10-20 14:02:08), 4f3068901819f158b50e47646da88f6464f7060c72163eea32fd1770e67a397d (2,019,920 B, 2026-10-20 15:02:14), 7d23121cdb2facca966a8abdd485e672a6ddde8c9b31b593b103eb66acaf37c2 (2,021,072 B, 2026-10-20 16:02:10), 3ff12a67ecd1a34c50ae5aea1122fd6114cad70622576ab1e1e1fa2c8420c84b (1,856,800 B, 2026-10-20 17:02:12), b43704c7b3626b2bd6a385fa53cca430efc1ccc6e52a24b8f6a24a6cab1ced7a (2,020,928 B, 2026-10-20 18:02:10), 3adc58de646efb487121248f127e51777ba433ba487fb859aba7997b9548b843 (1,971,360 B, 2026-10-20 19:02:12), 7fc348439fce7a0d6288edb1d60299b060011a49539ef955d57fd0fc2e0085cc (2,266,864 B, 2026-10-20 20:02:08), 19459527965033538912c33d6d83f90502b807b8374c2ce08d929f07821bd214 (1,938,720 B, 2026-10-20 21:02:14), 9994580d4550dc8809c8562f0c1e9b88dc88801c078cfe919c1b0a8de108dfb1 (1,938,768 B, 2026-10-20 22:02:10), 6f1a7a90cbd7a7bf70d9e85cd2d465bcc2018b1a895148ea82d87caf69360b96 (1,906,112 B, 2026-10-20 23:02:16), then this one. The stage-1 dropper on this host is not on our watch list, so only the payload URL is measured. The first build in the series was unpacked statically and 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. This build compared against the previous one: 46 __text functions against 45, TLSH of __text 88, within the range measured between builds of this family. The encrypted payload table holds 99 items totalling 263,612 bytes of plaintext against 73 items and 266,008 bytes in the previous build, a 0.9 percent move: the same script re-chunked. This build was not unpacked. Host answers HTTP 200 only to a curl User-Agent; browser User-Agents get a Cloudflare 520. Not executed.Intelligence
File Origin
# of uploads :
1
# of downloads :
184
Origin country :
USVendor Threat Intelligence
No detections
Detection(s):
Verdict:
Clean
Score:
99.9%
Tags:
n/a
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
masquerade
Verdict:
Malicious
Labled as:
Mac/malicious_confidence_90%
Verdict:
Malicious
File Type:
macho fat
First seen:
2026-10-21T02:12:00Z UTC
Last seen:
2026-10-22T21:42:00Z UTC
Hits:
~10
Score:
100%
Verdict:
Malware
File Type:
Mach-O universal binary
Threat name:
MacOS.Trojan.Generic
Status:
Suspicious
First seen:
2026-10-21 00:10:43 UTC
File Type:
Binary (Archive)
Extracted files:
2
AV detection:
4 of 24 (16.67%)
Threat level:
5/5
Detection(s):
Suspicious file
Malware family:
AtomicStealer
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Amos
Score:
1.00
YARA Signatures
MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.
| Rule name: | Foxveil_Loader_TaskInfo_Variant |
|---|---|
| Description: | Foxveil macOS loader (ClickFix -> AMOS), quill generation with run-time settings back inside the payload script (no constructor settings file): fat x86_64+arm64 linking CoreFoundation+libSystem+libc++ but importing nothing from CoreFoundation or objc, with the task_info/mach_task_self_ resolver core in both slices inside a per-build random libc decoy import set |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Web download
Link
Link
Link
Delivery method
Distributed via web download
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