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Willi BallenthinandMike Hunhoff
c1d20764ad
* use sequence scope instead of thread scope for "static: function" rules * use sequence scope instead of thread scope for "static: basic block" rules * make runtime linking rules more concise * doc: describe sequence scope * rename "sequence" scope to "span of calls" scope * Update anti-analysis/anti-av/check-for-sandbox-and-av-modules.yml Co-authored-by: Mike Hunhoff <[email protected]> * Update anti-analysis/anti-vm/vm-detection/check-for-windows-sandbox-via-device.yml Co-authored-by: Mike Hunhoff <[email protected]> * Update collection/get-geographical-location.yml Co-authored-by: Mike Hunhoff <[email protected]> * Update collection/file-managers/gather-classicftp-information.yml Co-authored-by: Mike Hunhoff <[email protected]> * Update collection/database/wmi/reference-wmi-statements.yml Co-authored-by: Mike Hunhoff <[email protected]> * Update collection/database/sql/reference-sql-statements.yml Co-authored-by: Mike Hunhoff <[email protected]> --------- Co-authored-by: Mike Hunhoff <[email protected]>
36 lines
1.2 KiB
YAML
36 lines
1.2 KiB
YAML
rule:
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meta:
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name: encrypt data using Salsa20 or ChaCha
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namespace: data-manipulation/encryption/salsa20
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authors:
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- [email protected]
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scopes:
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static: function
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dynamic: span of calls
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att&ck:
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- Defense Evasion::Obfuscated Files or Information [T1027]
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references:
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- http://cr.yp.to/snuffle/ecrypt.c
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features:
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# The constant words spell "expand 32-byte k" in ASCII (i.e. the 4 words are "expa", "nd 3", "2-by", and "te k")
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- or:
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- description: part of key setup
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- string: "expand 32-byte k"
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description: sigma
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- string: "expand 16-byte k"
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description: tau
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# if sigma and tau are in contiguous memory, may result in concatenated string
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- string: "expand 32-byte kexpand 16-byte k"
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- bytes: 65 78 70 61 6E 64 20 33 32 2D 62 79 74 65 20 6B = "expand 32-byte k"
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- bytes: 65 78 70 61 6E 64 20 31 36 2D 62 79 74 65 20 6B = "expand 16-byte k"
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- and:
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- string: "expa"
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- string: "nd 3"
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- string: "2-by"
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- string: "te k"
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- and:
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- number: 0x61707865 = "apxe"
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- number: 0x3320646E = "3 dn"
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- number: 0x79622D32 = "yb-2"
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- number: 0x6B206574 = "k et"
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