SYMBOLCOMMON_NAMEaka. SYNONYMS
win.torrentlocker (Back to overview)

TorrentLocker

aka: Teerac

There is no description at this point.

References
2014-09-11BleepingComputer ForumsDecrypterFixer
@online{decrypterfixer:20140911:torrentlocker:10d80ec, author = {DecrypterFixer}, title = {{TorrentLocker Ransomware Cracked and Decrypter has been made}}, date = {2014-09-11}, organization = {BleepingComputer Forums}, url = {http://www.bleepingcomputer.com/forums/t/547708/torrentlocker-ransomware-cracked-and-decrypter-has-been-made/}, language = {English}, urldate = {2020-01-06} } TorrentLocker Ransomware Cracked and Decrypter has been made
TorrentLocker
Yara Rules
[TLP:WHITE] win_torrentlocker_auto (20200529 | autogenerated rule brought to you by yara-signator)
rule win_torrentlocker_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-05-30"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.torrentlocker"
        malpedia_rule_date = "20200529"
        malpedia_hash = "92c362319514e5a6da26204961446caa3a8b32a8"
        malpedia_version = "20200529"
        malpedia_license = "CC BY-NC-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 / approach 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 = { c3 83f801 7405 83f802 }
            // n = 4, score = 500
            //   c3                   | ret                 
            //   83f801               | cmp                 eax, 1
            //   7405                 | je                  7
            //   83f802               | cmp                 eax, 2

        $sequence_1 = { 40 83f806 72f1 33f6 }
            // n = 4, score = 400
            //   40                   | inc                 eax
            //   83f806               | cmp                 eax, 6
            //   72f1                 | jb                  0xfffffff3
            //   33f6                 | xor                 esi, esi

        $sequence_2 = { 740a c705????????ffffffff 8b0d???????? 890e }
            // n = 4, score = 400
            //   740a                 | je                  0xc
            //   c705????????ffffffff     |     
            //   8b0d????????         |                     
            //   890e                 | mov                 dword ptr [esi], ecx

        $sequence_3 = { 6a00 52 ff15???????? 5e 8bc7 5f }
            // n = 6, score = 400
            //   6a00                 | push                0
            //   52                   | push                edx
            //   ff15????????         |                     
            //   5e                   | pop                 esi
            //   8bc7                 | mov                 eax, edi
            //   5f                   | pop                 edi

        $sequence_4 = { 6a06 e8???????? 83c418 8bc6 5e }
            // n = 5, score = 400
            //   6a06                 | push                6
            //   e8????????           |                     
            //   83c418               | add                 esp, 0x18
            //   8bc6                 | mov                 eax, esi
            //   5e                   | pop                 esi

        $sequence_5 = { 753c 68???????? b8???????? bb???????? e8???????? 83c404 85c0 }
            // n = 7, score = 400
            //   753c                 | jne                 0x3e
            //   68????????           |                     
            //   b8????????           |                     
            //   bb????????           |                     
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   85c0                 | test                eax, eax

        $sequence_6 = { 8b0d???????? 890e e8???????? 8bd8 e8???????? }
            // n = 5, score = 400
            //   8b0d????????         |                     
            //   890e                 | mov                 dword ptr [esi], ecx
            //   e8????????           |                     
            //   8bd8                 | mov                 ebx, eax
            //   e8????????           |                     

        $sequence_7 = { 2bc2 d1f8 8d4c0010 33c0 85c9 7461 51 }
            // n = 7, score = 400
            //   2bc2                 | sub                 eax, edx
            //   d1f8                 | sar                 eax, 1
            //   8d4c0010             | lea                 ecx, [eax + eax + 0x10]
            //   33c0                 | xor                 eax, eax
            //   85c9                 | test                ecx, ecx
            //   7461                 | je                  0x63
            //   51                   | push                ecx

        $sequence_8 = { ffd6 83f801 7526 68400000f0 50 6a00 }
            // n = 6, score = 400
            //   ffd6                 | call                esi
            //   83f801               | cmp                 eax, 1
            //   7526                 | jne                 0x28
            //   68400000f0           | push                0xf0000040
            //   50                   | push                eax
            //   6a00                 | push                0

        $sequence_9 = { 753d 68080000f0 6a18 6a00 6a00 }
            // n = 5, score = 400
            //   753d                 | jne                 0x3f
            //   68080000f0           | push                0xf0000008
            //   6a18                 | push                0x18
            //   6a00                 | push                0
            //   6a00                 | push                0

        $sequence_10 = { 895608 ffd7 85c0 753c }
            // n = 4, score = 400
            //   895608               | mov                 dword ptr [esi + 8], edx
            //   ffd7                 | call                edi
            //   85c0                 | test                eax, eax
            //   753c                 | jne                 0x3e

        $sequence_11 = { ff15???????? 85c0 7510 6a78 50 68???????? e8???????? }
            // n = 7, score = 400
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7510                 | jne                 0x12
            //   6a78                 | push                0x78
            //   50                   | push                eax
            //   68????????           |                     
            //   e8????????           |                     

        $sequence_12 = { 85c0 751f ff15???????? 3d16000980 753d 68080000f0 }
            // n = 6, score = 400
            //   85c0                 | test                eax, eax
            //   751f                 | jne                 0x21
            //   ff15????????         |                     
            //   3d16000980           | cmp                 eax, 0x80090016
            //   753d                 | jne                 0x3f
            //   68080000f0           | push                0xf0000008

        $sequence_13 = { 6a00 68???????? ffd6 85c0 751f ff15???????? }
            // n = 6, score = 400
            //   6a00                 | push                0
            //   68????????           |                     
            //   ffd6                 | call                esi
            //   85c0                 | test                eax, eax
            //   751f                 | jne                 0x21
            //   ff15????????         |                     

        $sequence_14 = { 6a00 52 ffd6 a3???????? 85c0 }
            // n = 5, score = 400
            //   6a00                 | push                0
            //   52                   | push                edx
            //   ffd6                 | call                esi
            //   a3????????           |                     
            //   85c0                 | test                eax, eax

        $sequence_15 = { 68400000f0 50 6a00 6a00 68???????? ffd6 83f801 }
            // n = 7, score = 400
            //   68400000f0           | push                0xf0000040
            //   50                   | push                eax
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   68????????           |                     
            //   ffd6                 | call                esi
            //   83f801               | cmp                 eax, 1

    condition:
        7 of them and filesize < 933888
}
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