SYMBOLCOMMON_NAMEaka. SYNONYMS
win.tinytyphon (Back to overview)

TinyTyphon

Actor(s): Dropping Elephant


There is no description at this point.

References
2016-08-08ForcepointNicholas Griffin
@online{griffin:20160808:monsoon:ac7eb5b, author = {Nicholas Griffin}, title = {{MONSOON - Analysis Of An APT Campaign}}, date = {2016-08-08}, organization = {Forcepoint}, url = {https://www.forcepoint.com/blog/x-labs/monsoon-analysis-apt-campaign}, language = {English}, urldate = {2020-04-06} } MONSOON - Analysis Of An APT Campaign
BadNews TinyTyphon QUILTED TIGER
2016-08-08ForcepointAndy Settle, Nicholas Griffin, Abel Toro
@techreport{settle:20160808:monsoon:c4f71cc, author = {Andy Settle and Nicholas Griffin and Abel Toro}, title = {{MONSOON – ANALYSIS OF AN APT CAMPAIGN}}, date = {2016-08-08}, institution = {Forcepoint}, url = {https://www.forcepoint.com/sites/default/files/resources/files/forcepoint-security-labs-monsoon-analysis-report.pdf}, language = {English}, urldate = {2020-01-07} } MONSOON – ANALYSIS OF AN APT CAMPAIGN
BadNews TinyTyphon QUILTED TIGER
Yara Rules
[TLP:WHITE] win_tinytyphon_auto (20221125 | Detects win.tinytyphon.)
rule win_tinytyphon_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.tinytyphon."
        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.tinytyphon"
        malpedia_rule_date = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { 50 8b4df4 8b5508 8d440a18 50 }
            // n = 5, score = 200
            //   50                   | push                eax
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   8d440a18             | lea                 eax, [edx + ecx + 0x18]
            //   50                   | push                eax

        $sequence_1 = { 52 ff15???????? 50 8b45f0 50 8b8de8feffff }
            // n = 6, score = 200
            //   52                   | push                edx
            //   ff15????????         |                     
            //   50                   | push                eax
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]
            //   50                   | push                eax
            //   8b8de8feffff         | mov                 ecx, dword ptr [ebp - 0x118]

        $sequence_2 = { 8b55e0 8d84022ac68747 8945e0 8b4de0 }
            // n = 4, score = 200
            //   8b55e0               | mov                 edx, dword ptr [ebp - 0x20]
            //   8d84022ac68747       | lea                 eax, [edx + eax + 0x4787c62a]
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   8b4de0               | mov                 ecx, dword ptr [ebp - 0x20]

        $sequence_3 = { c785a8fdffff00000000 6a00 6a08 6a00 8d85a4fdffff 50 8b8de8feffff }
            // n = 7, score = 200
            //   c785a8fdffff00000000     | mov    dword ptr [ebp - 0x258], 0
            //   6a00                 | push                0
            //   6a08                 | push                8
            //   6a00                 | push                0
            //   8d85a4fdffff         | lea                 eax, [ebp - 0x25c]
            //   50                   | push                eax
            //   8b8de8feffff         | mov                 ecx, dword ptr [ebp - 0x118]

        $sequence_4 = { e9???????? ebc2 8d8df8feffff 51 ff15???????? 83c00e 8945fc }
            // n = 7, score = 200
            //   e9????????           |                     
            //   ebc2                 | jmp                 0xffffffc4
            //   8d8df8feffff         | lea                 ecx, [ebp - 0x108]
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   83c00e               | add                 eax, 0xe
            //   8945fc               | mov                 dword ptr [ebp - 4], eax

        $sequence_5 = { ff15???????? 8d45ec 50 e8???????? 83c404 8945fc 833d????????00 }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   8d45ec               | lea                 eax, [ebp - 0x14]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   833d????????00       |                     

        $sequence_6 = { 8b45f8 8d8c08442229f4 894df8 8b55f8 }
            // n = 4, score = 200
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   8d8c08442229f4       | lea                 ecx, [eax + ecx - 0xbd6ddbc]
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]

        $sequence_7 = { 8b55f4 0fb6422d c1e008 0bc8 8b55f4 0fb6422e }
            // n = 6, score = 200
            //   8b55f4               | mov                 edx, dword ptr [ebp - 0xc]
            //   0fb6422d             | movzx               eax, byte ptr [edx + 0x2d]
            //   c1e008               | shl                 eax, 8
            //   0bc8                 | or                  ecx, eax
            //   8b55f4               | mov                 edx, dword ptr [ebp - 0xc]
            //   0fb6422e             | movzx               eax, byte ptr [edx + 0x2e]

        $sequence_8 = { 8b8df0feffff 83c101 898df0feffff 8b95dcfeffff 83c201 8995dcfeffff }
            // n = 6, score = 200
            //   8b8df0feffff         | mov                 ecx, dword ptr [ebp - 0x110]
            //   83c101               | add                 ecx, 1
            //   898df0feffff         | mov                 dword ptr [ebp - 0x110], ecx
            //   8b95dcfeffff         | mov                 edx, dword ptr [ebp - 0x124]
            //   83c201               | add                 edx, 1
            //   8995dcfeffff         | mov                 dword ptr [ebp - 0x124], edx

        $sequence_9 = { 8b4d0c 034dfc 0fbe512c 83fa2e 7506 8b45fc 8945e4 }
            // n = 7, score = 200
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   034dfc               | add                 ecx, dword ptr [ebp - 4]
            //   0fbe512c             | movsx               edx, byte ptr [ecx + 0x2c]
            //   83fa2e               | cmp                 edx, 0x2e
            //   7506                 | jne                 8
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax

    condition:
        7 of them and filesize < 90112
}
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