SYMBOLCOMMON_NAMEaka. SYNONYMS
win.exaramel (Back to overview)

Exaramel

Actor(s): TeleBots


There is no description at this point.

References
2020-01-31Virus BulletinMichal Poslušný, Peter Kálnai
@online{poslun:20200131:rich:c25f156, author = {Michal Poslušný and Peter Kálnai}, title = {{Rich Headers: leveraging this mysterious artifact of the PE format}}, date = {2020-01-31}, organization = {Virus Bulletin}, url = {https://www.virusbulletin.com/virusbulletin/2020/01/vb2019-paper-rich-headers-leveraging-mysterious-artifact-pe-format/}, language = {English}, urldate = {2020-02-03} } Rich Headers: leveraging this mysterious artifact of the PE format
Dridex Exaramel Industroyer Neutrino RCS Sathurbot
2020-01DragosJoe Slowik
@techreport{slowik:202001:threat:d891011, author = {Joe Slowik}, title = {{Threat Intelligence and the Limits of Malware Analysis}}, date = {2020-01}, institution = {Dragos}, url = {https://pylos.co/wp-content/uploads/2020/02/Threat-Intelligence-and-the-Limits-of-Malware-Analysis.pdf}, language = {English}, urldate = {2020-06-10} } Threat Intelligence and the Limits of Malware Analysis
Exaramel Exaramel Industroyer Lookback NjRAT PlugX
2018-10-11ESET ResearchAnton Cherepanov, Robert Lipovsky
@online{cherepanov:20181011:new:8e588c3, author = {Anton Cherepanov and Robert Lipovsky}, title = {{New TeleBots backdoor: First evidence linking Industroyer to NotPetya}}, date = {2018-10-11}, organization = {ESET Research}, url = {https://www.welivesecurity.com/2018/10/11/new-telebots-backdoor-linking-industroyer-notpetya/}, language = {English}, urldate = {2019-11-14} } New TeleBots backdoor: First evidence linking Industroyer to NotPetya
Exaramel EternalPetya Exaramel Industroyer
Yara Rules
[TLP:WHITE] win_exaramel_auto (20200529 | autogenerated rule brought to you by yara-signator)
rule win_exaramel_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.exaramel"
        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 = { e8???????? 83c404 85c0 744a 8d85a0edffff }
            // n = 5, score = 100
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   85c0                 | test                eax, eax
            //   744a                 | je                  0x4c
            //   8d85a0edffff         | lea                 eax, [ebp - 0x1260]

        $sequence_1 = { 85ff 741a 8b75dc 8b1d???????? 4f 66833e08 7503 }
            // n = 7, score = 100
            //   85ff                 | test                edi, edi
            //   741a                 | je                  0x1c
            //   8b75dc               | mov                 esi, dword ptr [ebp - 0x24]
            //   8b1d????????         |                     
            //   4f                   | dec                 edi
            //   66833e08             | cmp                 word ptr [esi], 8
            //   7503                 | jne                 5

        $sequence_2 = { 8d85dcfeffff 740b 50 e8???????? 83c404 eb0b 6a00 }
            // n = 7, score = 100
            //   8d85dcfeffff         | lea                 eax, [ebp - 0x124]
            //   740b                 | je                  0xd
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   eb0b                 | jmp                 0xd
            //   6a00                 | push                0

        $sequence_3 = { 55 8bec 83ec1c 56 8b7508 c745fc00000000 85f6 }
            // n = 7, score = 100
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   83ec1c               | sub                 esp, 0x1c
            //   56                   | push                esi
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   85f6                 | test                esi, esi

        $sequence_4 = { 782e 8b35???????? 8d8320040000 50 c705????????00000000 ffd6 a3???????? }
            // n = 7, score = 100
            //   782e                 | js                  0x30
            //   8b35????????         |                     
            //   8d8320040000         | lea                 eax, [ebx + 0x420]
            //   50                   | push                eax
            //   c705????????00000000     |     
            //   ffd6                 | call                esi
            //   a3????????           |                     

        $sequence_5 = { ffb5e8fdffff ff15???????? 8b4dfc 8bc7 }
            // n = 4, score = 100
            //   ffb5e8fdffff         | push                dword ptr [ebp - 0x218]
            //   ff15????????         |                     
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   8bc7                 | mov                 eax, edi

        $sequence_6 = { 740b 891e 33f6 5b 5f 8bc6 }
            // n = 6, score = 100
            //   740b                 | je                  0xd
            //   891e                 | mov                 dword ptr [esi], ebx
            //   33f6                 | xor                 esi, esi
            //   5b                   | pop                 ebx
            //   5f                   | pop                 edi
            //   8bc6                 | mov                 eax, esi

        $sequence_7 = { 8d852cf8ffff 68???????? 50 ff15???????? 68???????? 8d852cf8ffff }
            // n = 6, score = 100
            //   8d852cf8ffff         | lea                 eax, [ebp - 0x7d4]
            //   68????????           |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   68????????           |                     
            //   8d852cf8ffff         | lea                 eax, [ebp - 0x7d4]

        $sequence_8 = { 83c404 ebb0 e8???????? 83c404 e8???????? }
            // n = 5, score = 100
            //   83c404               | add                 esp, 4
            //   ebb0                 | jmp                 0xffffffb2
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   e8????????           |                     

        $sequence_9 = { ff7510 ff75f8 e8???????? 83c408 8b45fc 50 8b08 }
            // n = 7, score = 100
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   50                   | push                eax
            //   8b08                 | mov                 ecx, dword ptr [eax]

    condition:
        7 of them and filesize < 294912
}
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