SYMBOLCOMMON_NAMEaka. SYNONYMS
win.wscspl (Back to overview)

WSCSPL

Actor(s): Dropping Elephant


There is no description at this point.

References
2018-11-29360 Threat IntelligenceThreat Intelligence Center
@online{center:20181129:analysis:d46e3e4, author = {Threat Intelligence Center}, title = {{Analysis Of Targeted Attack Against Pakistan By Exploiting InPage Vulnerability And Related APT Groups}}, date = {2018-11-29}, organization = {360 Threat Intelligence}, url = {https://ti.qianxin.com/blog/articles/analysis-of-targeted-attack-against-pakistan-by-exploiting-inpage-vulnerability-and-related-apt-groups-english/}, language = {English}, urldate = {2022-01-03} } Analysis Of Targeted Attack Against Pakistan By Exploiting InPage Vulnerability And Related APT Groups
BioData Bitter RAT WSCSPL
Yara Rules
[TLP:WHITE] win_wscspl_auto (20220411 | Detects win.wscspl.)
rule win_wscspl_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.wscspl."
        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.wscspl"
        malpedia_rule_date = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 2bc2 51 8bd8 e8???????? }
            // n = 4, score = 400
            //   2bc2                 | sub                 eax, edx
            //   51                   | push                ecx
            //   8bd8                 | mov                 ebx, eax
            //   e8????????           |                     

        $sequence_1 = { 33c4 89842448010000 6804010000 8d442448 50 68???????? ff15???????? }
            // n = 7, score = 400
            //   33c4                 | xor                 eax, esp
            //   89842448010000       | mov                 dword ptr [esp + 0x148], eax
            //   6804010000           | push                0x104
            //   8d442448             | lea                 eax, dword ptr [esp + 0x48]
            //   50                   | push                eax
            //   68????????           |                     
            //   ff15????????         |                     

        $sequence_2 = { ff15???????? a3???????? e9???????? 687c230000 68???????? 68???????? }
            // n = 6, score = 400
            //   ff15????????         |                     
            //   a3????????           |                     
            //   e9????????           |                     
            //   687c230000           | push                0x237c
            //   68????????           |                     
            //   68????????           |                     

        $sequence_3 = { 55 8b2d???????? b8???????? 56 8d5001 }
            // n = 5, score = 400
            //   55                   | push                ebp
            //   8b2d????????         |                     
            //   b8????????           |                     
            //   56                   | push                esi
            //   8d5001               | lea                 edx, dword ptr [eax + 1]

        $sequence_4 = { 8b0d???????? 03c2 3bc1 763d 03c9 }
            // n = 5, score = 400
            //   8b0d????????         |                     
            //   03c2                 | add                 eax, edx
            //   3bc1                 | cmp                 eax, ecx
            //   763d                 | jbe                 0x3f
            //   03c9                 | add                 ecx, ecx

        $sequence_5 = { 8b1d???????? 55 33c0 56 }
            // n = 4, score = 400
            //   8b1d????????         |                     
            //   55                   | push                ebp
            //   33c0                 | xor                 eax, eax
            //   56                   | push                esi

        $sequence_6 = { 5e 5b 33cc c705????????a10f0000 }
            // n = 4, score = 400
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   33cc                 | xor                 ecx, esp
            //   c705????????a10f0000     |     

        $sequence_7 = { a3???????? 85c0 7506 33d2 }
            // n = 4, score = 400
            //   a3????????           |                     
            //   85c0                 | test                eax, eax
            //   7506                 | jne                 8
            //   33d2                 | xor                 edx, edx

        $sequence_8 = { 89442438 e8???????? 8b7c2438 83c702 68???????? }
            // n = 5, score = 400
            //   89442438             | mov                 dword ptr [esp + 0x38], eax
            //   e8????????           |                     
            //   8b7c2438             | mov                 edi, dword ptr [esp + 0x38]
            //   83c702               | add                 edi, 2
            //   68????????           |                     

        $sequence_9 = { 2bc2 50 8d842484020000 50 8d8c3480010000 51 }
            // n = 6, score = 400
            //   2bc2                 | sub                 eax, edx
            //   50                   | push                eax
            //   8d842484020000       | lea                 eax, dword ptr [esp + 0x284]
            //   50                   | push                eax
            //   8d8c3480010000       | lea                 ecx, dword ptr [esp + esi + 0x180]
            //   51                   | push                ecx

    condition:
        7 of them and filesize < 901120
}
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