MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ff9c8f57fa3ec4c935c343bc636dee3253e6b6e4dbbd0d64e7898f0c7f7c5598. 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: 7

Intelligence 7 IOCs YARA 3 File information Comments

SHA256 hash:	ff9c8f57fa3ec4c935c343bc636dee3253e6b6e4dbbd0d64e7898f0c7f7c5598
SHA3-384 hash:	d05e605e9db277e339848702757bc3c404301d0035e0e494b30ea8c4269598ed58f5e07b6e063afeff50660f1421f695
SHA1 hash:	70b9fe56b60c8d01d6a156f3daa3eafd20d0fe2c
MD5 hash:	e2592299ed996606a84f8e51ef06e215
humanhash:	king-tennessee-uranus-cat
File name:	macho_ff9c8f57fa3e.bin
Download:	download sample
Signature	AMOS Create hunting rule
File size:	1'953'888 bytes
First seen:	2026-10-19 00:04:52 UTC
Last seen:	Never
File type:	macho
MIME type:	application/x-mach-binary
ssdeep	49152:oE65tqy/XMYQA+ebGxEa+L02Mp8unpi6gkkeF:qrq9gL2
TLSH	T14C95F1F42276616CE80227F3F4100BD45AA067B16E0D76EA2B21E7617D35BD3AD62733
TrID	82.2% (.DYLIB) Mac OS X Mach-O universal Dynamically linked shared Library (32500/1/5) 17.7% (.O/DYLIB/BUNDLE) Mac OS X Universal Binary (generic) (7002/2)
Magika	macho
Reporter	c4ffeine
Tags:	AMOS ClickFix Foxveil Loader Mach-O machO macOS

c4ffeine

Foxveil 'nova' build Mach-O, the FORTY-FIRST payload served from this one unchanged URL (fat x86_64+arm64, 1,953,888 B), fetched via Tor 2026-10-19 00:02:17 UTC, origin build time 00:01:57, 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 2026-10-16 16:01:56, 18:01:57, 19:02:02, 22:01:56, 23:02:04, 2026-10-17 00:01:55, 2026-10-18 00:01:57, 18:01:58, 19:02:03, 20:01:56, 22:01:58, 23:02:04 and 2026-10-19 00:01:57 UTC. The job skips hours rather than running on a fixed interval, and the gaps measured so far run from 59 minutes to 4 hours 59 minutes. Hash sequence on the same URL: cefb465886bc813ac91e9ad5b1835eefe9828f251b58eb0da012ee4022ff6d98 (1,758,512 B, 2026-10-16 16:01:56), 6d0e9b099c6fab4f8fafcf83b380df6b817df0a06fd041acd64d37a8f2cc909b (1,955,056 B, 2026-10-16 18:01:57), 3cd3cac10596820b929eda2e13a110c9734adfefab86872ee5573f4bcea787e0 (2,004,240 B, 2026-10-16 19:02:02), 01d6c151f944b25d17f351dae3be8dfb3f3d89685838646704f1eb55bd4327a6 (1,710,016 B, 2026-10-16 22:01:56), 26bdb60a09509a4747cf622cee7073bdc639f849169232294d992ebd2f38de21 (2,136,048 B, 2026-10-16 23:02:04), 21fd4621502f4fb9240b76333ed40f6097f1a4a7a9359dcc20fe198f49eee5f8 (1,972,080 B, 2026-10-17 20:01:56), 112ce65fde13d2d815eec63d35714388566009420b533603c47a7cbaeae26a3c (2,102,128 B, 2026-10-18 17:02:03), 776fd70497cb6ead54c047eaf624886de308364ff2513e9accca8bab09714824 (1,971,760 B, 2026-10-18 18:01:58), f4d558133f6ffc69d42dd5c3504938e82fe1a4ef241344f729ae22f6d200cd1e (2,069,440 B, 2026-10-18 19:02:03), c66457e25286934b41d159943f7d97f01988fd7801425d3d938823983c25223d (1,807,968 B, 2026-10-18 20:01:56), 768fb1929679a74bba202c9b4d2325c2053df6d601469bc45e5aceba87a02427 (1,939,152 B, 2026-10-18 22:01:58), b5d4aba0fe4004e851756d0329f0c165db2c1667c7c73516e0f1537c9afd3298 (1,922,560 B, 2026-10-18 23:02:04), 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: 44 __text functions against 44, TLSH of __text 118, within the range measured between builds of this family. The encrypted payload table holds 86 items totalling 265,904 bytes of plaintext against 90 items and 259,274 bytes in the previous build, a 2.6 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 :

# of downloads :

Origin country :

Vendor Threat Intelligence

No detections

Verdict:

Clean

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6ad55ec15a22ac805bd7cbf6

Tags:

n/a

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

masquerade

Link:

https://www.filescan.io/uploads/6ad55ec3c5e5e34b10394187/reports/024acfef-589e-4f32-912c-176d31d1b88d/overview

Verdict:

Malicious

Labled as:

Mac/malicious_confidence_90%

Link:

https://www.hybrid-analysis.com/sample/ff9c8f57fa3ec4c935c343bc636dee3253e6b6e4dbbd0d64e7898f0c7f7c5598

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/ff9c8f57fa3ec4c935c343bc636dee3253e6b6e4dbbd0d64e7898f0c7f7c5598/

Threat name:

MacOS.Trojan.Generic

Status:

Suspicious

First seen:

2026-10-19 00:05:25 UTC

File Type:

Binary (Archive)

Extracted files:

AV detection:

3 of 36 (8.33%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=76oi6v72h3cmsnodio6gg3pogjj6nnxe3o6q2zhhrghqy734kwma._file

Malware family:

AtomicStealer

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/ff9c8f57fa3e/report/overview.html

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

Amos

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/ff9c8f57fa3ec4c935c343bc636dee3253e6b6e4dbbd0d64e7898f0c7f7c5598

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:	CP_Script_Inject_Detector Create hunting rule
Author:	DiegoAnalytics
Description:	Detects attempts to inject code into another process across PE, ELF, Mach-O binaries

Rule name:	Foxveil_Loader_TaskInfo_Variant Create hunting rule
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