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 (20201014 | autogenerated rule brought to you by yara-signator)
rule win_exaramel_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.exaramel"
        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 = { 57 8db844db4100 57 ff15???????? ff0d???????? }
            // n = 5, score = 100
            //   57                   | push                edi
            //   8db844db4100         | lea                 edi, [eax + 0x41db44]
            //   57                   | push                edi
            //   ff15????????         |                     
            //   ff0d????????         |                     

        $sequence_1 = { 7417 8b4508 50 6a00 ff15???????? 50 }
            // n = 6, score = 100
            //   7417                 | je                  0x19
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   50                   | push                eax

        $sequence_2 = { 8b8d9cf8ffff 85c9 0f8413050000 8b3c8d4c824100 85ff 755d }
            // n = 6, score = 100
            //   8b8d9cf8ffff         | mov                 ecx, dword ptr [ebp - 0x764]
            //   85c9                 | test                ecx, ecx
            //   0f8413050000         | je                  0x519
            //   8b3c8d4c824100       | mov                 edi, dword ptr [ecx*4 + 0x41824c]
            //   85ff                 | test                edi, edi
            //   755d                 | jne                 0x5f

        $sequence_3 = { 8bf0 ffb528f8ffff e8???????? 8b07 83c404 8b4020 6a01 }
            // n = 7, score = 100
            //   8bf0                 | mov                 esi, eax
            //   ffb528f8ffff         | push                dword ptr [ebp - 0x7d8]
            //   e8????????           |                     
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   83c404               | add                 esp, 4
            //   8b4020               | mov                 eax, dword ptr [eax + 0x20]
            //   6a01                 | push                1

        $sequence_4 = { 7719 ff2485897a4000 6a04 58 5d c3 }
            // n = 6, score = 100
            //   7719                 | ja                  0x1b
            //   ff2485897a4000       | jmp                 dword ptr [eax*4 + 0x407a89]
            //   6a04                 | push                4
            //   58                   | pop                 eax
            //   5d                   | pop                 ebp
            //   c3                   | ret                 

        $sequence_5 = { 85f6 740d 8d45e4 50 56 e8???????? }
            // n = 6, score = 100
            //   85f6                 | test                esi, esi
            //   740d                 | je                  0xf
            //   8d45e4               | lea                 eax, [ebp - 0x1c]
            //   50                   | push                eax
            //   56                   | push                esi
            //   e8????????           |                     

        $sequence_6 = { c745fc00000000 50 ff7510 ff750c 57 ff15???????? }
            // n = 6, score = 100
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   50                   | push                eax
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   57                   | push                edi
            //   ff15????????         |                     

        $sequence_7 = { c78528f8ffff00000000 ff35???????? ff15???????? 8bf8 85ff }
            // n = 5, score = 100
            //   c78528f8ffff00000000     | mov    dword ptr [ebp - 0x7d8], 0
            //   ff35????????         |                     
            //   ff15????????         |                     
            //   8bf8                 | mov                 edi, eax
            //   85ff                 | test                edi, edi

        $sequence_8 = { 56 50 e8???????? 83c408 85c0 7834 ff750c }
            // n = 7, score = 100
            //   56                   | push                esi
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   85c0                 | test                eax, eax
            //   7834                 | js                  0x36
            //   ff750c               | push                dword ptr [ebp + 0xc]

        $sequence_9 = { c70600000000 83ff08 7d79 8d4508 c7450800000000 50 6a00 }
            // n = 7, score = 100
            //   c70600000000         | mov                 dword ptr [esi], 0
            //   83ff08               | cmp                 edi, 8
            //   7d79                 | jge                 0x7b
            //   8d4508               | lea                 eax, [ebp + 8]
            //   c7450800000000       | mov                 dword ptr [ebp + 8], 0
            //   50                   | push                eax
            //   6a00                 | push                0

    condition:
        7 of them and filesize < 294912
}
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