SYMBOLCOMMON_NAMEaka. SYNONYMS
win.seasalt (Back to overview)

SeaSalt

Actor(s): Comment Crew


There is no description at this point.

References
2018MandiantMandiant
@techreport{mandiant:2018:apt1:b76cc4d, author = {Mandiant}, title = {{APT1}}, date = {2018}, institution = {Mandiant}, url = {https://github.com/securitykitten/malware_references/blob/master/Appendix%20C%20(Digital)%20-%20The%20Malware%20Arsenal.pdf}, language = {English}, urldate = {2020-01-13} } APT1
Auriga Biscuit Bouncer Combos CookieBag Dairy GetMail GlooxMail Goggles Hacksfase Helauto Kurton ManItsMe MAPIget MiniASP NewsReels SeaSalt StarsyPound Sword TabMsgSQL Tarsip WebC2-AdSpace WebC2-Ausov WebC2-Bolid WebC2-Cson WebC2-DIV WebC2-GreenCat WebC2-Head WebC2-Kt3 WebC2-Qbp WebC2-Rave WebC2-Table WebC2-UGX WebC2-Yahoo
Yara Rules
[TLP:WHITE] win_seasalt_auto (20220516 | Detects win.seasalt.)
rule win_seasalt_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.seasalt."
        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.seasalt"
        malpedia_rule_date = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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???????? 8d542430 68e8010000 8d842434020000 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   8d542430             | lea                 edx, [esp + 0x30]
            //   68e8010000           | push                0x1e8
            //   8d842434020000       | lea                 eax, [esp + 0x234]

        $sequence_1 = { 8bf8 85ff 745d 6a00 56 }
            // n = 5, score = 100
            //   8bf8                 | mov                 edi, eax
            //   85ff                 | test                edi, edi
            //   745d                 | je                  0x5f
            //   6a00                 | push                0
            //   56                   | push                esi

        $sequence_2 = { ff15???????? 85c0 7f85 899c2478100000 }
            // n = 4, score = 100
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7f85                 | jg                  0xffffff87
            //   899c2478100000       | mov                 dword ptr [esp + 0x1078], ebx

        $sequence_3 = { 85c0 75bb 8b442414 8d942420010000 52 }
            // n = 5, score = 100
            //   85c0                 | test                eax, eax
            //   75bb                 | jne                 0xffffffbd
            //   8b442414             | mov                 eax, dword ptr [esp + 0x14]
            //   8d942420010000       | lea                 edx, [esp + 0x120]
            //   52                   | push                edx

        $sequence_4 = { 0f8557030000 c745fc00000000 8b35???????? 68???????? ffd6 85c0 }
            // n = 6, score = 100
            //   0f8557030000         | jne                 0x35d
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   8b35????????         |                     
            //   68????????           |                     
            //   ffd6                 | call                esi
            //   85c0                 | test                eax, eax

        $sequence_5 = { 6a00 51 ff15???????? 83f81f 6a00 }
            // n = 5, score = 100
            //   6a00                 | push                0
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   83f81f               | cmp                 eax, 0x1f
            //   6a00                 | push                0

        $sequence_6 = { 49 8d84248c010000 51 50 }
            // n = 4, score = 100
            //   49                   | dec                 ecx
            //   8d84248c010000       | lea                 eax, [esp + 0x18c]
            //   51                   | push                ecx
            //   50                   | push                eax

        $sequence_7 = { 50 53 ffd5 8d4c2412 51 e8???????? }
            // n = 6, score = 100
            //   50                   | push                eax
            //   53                   | push                ebx
            //   ffd5                 | call                ebp
            //   8d4c2412             | lea                 ecx, [esp + 0x12]
            //   51                   | push                ecx
            //   e8????????           |                     

        $sequence_8 = { 5e 83c420 c3 53 8b1d???????? 8d4c2410 }
            // n = 6, score = 100
            //   5e                   | pop                 esi
            //   83c420               | add                 esp, 0x20
            //   c3                   | ret                 
            //   53                   | push                ebx
            //   8b1d????????         |                     
            //   8d4c2410             | lea                 ecx, [esp + 0x10]

        $sequence_9 = { 83e01f 8b0c8d40db0010 8d04c0 8d0481 eb05 }
            // n = 5, score = 100
            //   83e01f               | and                 eax, 0x1f
            //   8b0c8d40db0010       | mov                 ecx, dword ptr [ecx*4 + 0x1000db40]
            //   8d04c0               | lea                 eax, [eax + eax*8]
            //   8d0481               | lea                 eax, [ecx + eax*4]
            //   eb05                 | jmp                 7

    condition:
        7 of them and filesize < 139264
}
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