Actor(s): APT33
There is no description at this point.
rule win_dropshot_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2022-08-05" version = "1" description = "Detects win.dropshot." info = "autogenerated rule brought to you by yara-signator" tool = "yara-signator v0.6.0" signator_config = "callsandjumps;datarefs;binvalue" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.dropshot" malpedia_rule_date = "20220805" malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71" malpedia_version = "20220808" malpedia_license = "CC BY-SA 4.0" malpedia_sharing = "TLP:WHITE" /* DISCLAIMER * The strings used in this rule have been automatically selected from the * disassembly of memory dumps and unpacked files, using YARA-Signator. * The code and documentation is published here: * https://github.com/fxb-cocacoding/yara-signator * As Malpedia is used as data source, please note that for a given * number of families, only single samples are documented. * This likely impacts the degree of generalization these rules will offer. * Take the described generation method also into consideration when you * apply the rules in your use cases and assign them confidence levels. */ strings: $sequence_0 = { e8???????? eb05 e8???????? 68e8030000 ff15???????? } // n = 5, score = 200 // e8???????? | // eb05 | jmp 7 // e8???????? | // 68e8030000 | push 0x3e8 // ff15???????? | $sequence_1 = { 6a00 ff15???????? 6a05 ff15???????? ff15???????? 6a00 6a00 } // n = 7, score = 200 // 6a00 | push 0 // ff15???????? | // 6a05 | push 5 // ff15???????? | // ff15???????? | // 6a00 | push 0 // 6a00 | push 0 $sequence_2 = { 6a64 ff15???????? 6800800000 6a00 } // n = 4, score = 200 // 6a64 | push 0x64 // ff15???????? | // 6800800000 | push 0x8000 // 6a00 | push 0 $sequence_3 = { ff15???????? 6a04 6800100000 6808020000 6a00 } // n = 5, score = 200 // ff15???????? | // 6a04 | push 4 // 6800100000 | push 0x1000 // 6808020000 | push 0x208 // 6a00 | push 0 $sequence_4 = { e8???????? 83c40c 6a04 6800100000 6804010000 } // n = 5, score = 200 // e8???????? | // 83c40c | add esp, 0xc // 6a04 | push 4 // 6800100000 | push 0x1000 // 6804010000 | push 0x104 $sequence_5 = { 6a00 68???????? 6a00 ff15???????? b801000000 } // n = 5, score = 200 // 6a00 | push 0 // 68???????? | // 6a00 | push 0 // ff15???????? | // b801000000 | mov eax, 1 $sequence_6 = { 6800100000 6804010000 6a00 ff15???????? } // n = 4, score = 200 // 6800100000 | push 0x1000 // 6804010000 | push 0x104 // 6a00 | push 0 // ff15???????? | $sequence_7 = { 6a00 6a00 ff15???????? 6a00 6a00 68???????? } // n = 6, score = 200 // 6a00 | push 0 // 6a00 | push 0 // ff15???????? | // 6a00 | push 0 // 6a00 | push 0 // 68???????? | condition: 7 of them and filesize < 483328 }
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