SYMBOLCOMMON_NAMEaka. SYNONYMS
win.sunorcal (Back to overview)

SunOrcal


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References
2017-11-10Palo Alto Networks Unit 42Josh Grunzweig, Jen Miller-Osborn
@online{grunzweig:20171110:new:12fdedb, author = {Josh Grunzweig and Jen Miller-Osborn}, title = {{New Malware with Ties to SunOrcal Discovered}}, date = {2017-11-10}, organization = {Palo Alto Networks Unit 42}, url = {https://researchcenter.paloaltonetworks.com/2017/11/unit42-new-malware-with-ties-to-sunorcal-discovered/}, language = {English}, urldate = {2019-12-20} } New Malware with Ties to SunOrcal Discovered
Reaver SunOrcal
2016-03-01PWCMichael Yip
@online{yip:20160301:taiwan:0865934, author = {Michael Yip}, title = {{Taiwan Presidential Election: A Case Study on Thematic Targeting}}, date = {2016-03-01}, organization = {PWC}, url = {http://pwc.blogs.com/cyber_security_updates/2016/03/index.html}, language = {English}, urldate = {2020-01-08} } Taiwan Presidential Election: A Case Study on Thematic Targeting
SunOrcal
Yara Rules
[TLP:WHITE] win_sunorcal_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_sunorcal_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.sunorcal"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { 68b7000000 ff15???????? 6a64 68???????? 6a67 }
            // n = 5, score = 200
            //   68b7000000           | push                0xb7
            //   ff15????????         |                     
            //   6a64                 | push                0x64
            //   68????????           |                     
            //   6a67                 | push                0x67

        $sequence_1 = { 6a03 e8???????? cc 55 8bec 83ec0c }
            // n = 6, score = 200
            //   6a03                 | push                3
            //   e8????????           |                     
            //   cc                   | int3                
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   83ec0c               | sub                 esp, 0xc

        $sequence_2 = { ff15???????? 68b7000000 ff15???????? 6a64 }
            // n = 4, score = 200
            //   ff15????????         |                     
            //   68b7000000           | push                0xb7
            //   ff15????????         |                     
            //   6a64                 | push                0x64

        $sequence_3 = { 68???????? ff15???????? 33c0 c3 c3 55 }
            // n = 6, score = 200
            //   68????????           |                     
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   c3                   | ret                 
            //   c3                   | ret                 
            //   55                   | push                ebp

        $sequence_4 = { ff15???????? 33c0 c3 c3 55 8bec }
            // n = 6, score = 200
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   c3                   | ret                 
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp

        $sequence_5 = { 5e 5b c21000 8b442404 8b00 813863736de0 }
            // n = 6, score = 200
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   c21000               | ret                 0x10
            //   8b442404             | mov                 eax, dword ptr [esp + 4]
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   813863736de0         | cmp                 dword ptr [eax], 0xe06d7363

        $sequence_6 = { 5b c21000 8b442404 8b00 }
            // n = 4, score = 200
            //   5b                   | pop                 ebx
            //   c21000               | ret                 0x10
            //   8b442404             | mov                 eax, dword ptr [esp + 4]
            //   8b00                 | mov                 eax, dword ptr [eax]

        $sequence_7 = { 50 6a00 ff15???????? 6800040000 e8???????? }
            // n = 5, score = 200
            //   50                   | push                eax
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   6800040000           | push                0x400
            //   e8????????           |                     

        $sequence_8 = { 68???????? ff15???????? 33c0 c3 c3 55 8bec }
            // n = 7, score = 200
            //   68????????           |                     
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   c3                   | ret                 
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp

        $sequence_9 = { c21000 8b442404 8b00 813863736de0 }
            // n = 4, score = 200
            //   c21000               | ret                 0x10
            //   8b442404             | mov                 eax, dword ptr [esp + 4]
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   813863736de0         | cmp                 dword ptr [eax], 0xe06d7363

    condition:
        7 of them and filesize < 172032
}
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