SYMBOLCOMMON_NAMEaka. SYNONYMS
win.ranbyus (Back to overview)

Ranbyus


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References
2022-04-27ANSSIANSSI
@techreport{anssi:20220427:le:5d47343, author = {ANSSI}, title = {{LE GROUPE CYBERCRIMINEL FIN7}}, date = {2022-04-27}, institution = {ANSSI}, url = {https://cert.ssi.gouv.fr/uploads/20220427_NP_TLPWHITE_ANSSI_FIN7.pdf}, language = {French}, urldate = {2022-05-05} } LE GROUPE CYBERCRIMINEL FIN7
Bateleur BELLHOP Griffon SQLRat POWERSOURCE Andromeda BABYMETAL BlackCat BlackMatter BOOSTWRITE Carbanak Cobalt Strike DNSMessenger Dridex DRIFTPIN Gameover P2P MimiKatz Murofet Qadars Ranbyus SocksBot
2016Group-IBGroup-IB
@techreport{groupib:2016:analysis:1fb7334, author = {Group-IB}, title = {{Analysis of Attacks against Trading and Bank Card Systems}}, date = {2016}, institution = {Group-IB}, url = {https://www.group-ib.ru/brochures/Group-IB-Corkow-Report-EN.pdf}, language = {English}, urldate = {2021-02-09} } Analysis of Attacks against Trading and Bank Card Systems
Ranbyus
2015-05-22Johannes Bader BlogJohannes Bader
@online{bader:20150522:dga:9ba1744, author = {Johannes Bader}, title = {{The DGA of Ranbyus}}, date = {2015-05-22}, organization = {Johannes Bader Blog}, url = {https://www.johannesbader.ch/2015/05/the-dga-of-ranbyus/}, language = {English}, urldate = {2020-01-06} } The DGA of Ranbyus
Ranbyus
2013-01-27Xylibox BlogXylitol
@online{xylitol:20130127:trojanwin32spyranbyus:79423b2, author = {Xylitol}, title = {{Trojan.Win32/Spy.Ranbyus}}, date = {2013-01-27}, organization = {Xylibox Blog}, url = {http://www.xylibox.com/2013/01/trojanwin32spyranbyus.html}, language = {English}, urldate = {2019-10-23} } Trojan.Win32/Spy.Ranbyus
Ranbyus
2012-12-19ESET ResearchAleksandr Matrosov
@online{matrosov:20121219:win32spyranbyus:955d383, author = {Aleksandr Matrosov}, title = {{Win32/Spy.Ranbyus modifying Java code in RBS Ukraine systems}}, date = {2012-12-19}, organization = {ESET Research}, url = {https://www.welivesecurity.com/2012/12/19/win32spy-ranbyus-modifying-java-code-in-rbs/}, language = {English}, urldate = {2019-11-14} } Win32/Spy.Ranbyus modifying Java code in RBS Ukraine systems
Ranbyus
2012-06-05ESET ResearchAleksandr Matrosov
@online{matrosov:20120605:smartcard:88d7163, author = {Aleksandr Matrosov}, title = {{Smartcard vulnerabilities in modern banking malware}}, date = {2012-06-05}, organization = {ESET Research}, url = {https://www.welivesecurity.com/2012/06/05/smartcard-vulnerabilities-in-modern-banking-malware/}, language = {English}, urldate = {2019-11-14} } Smartcard vulnerabilities in modern banking malware
Ranbyus
Yara Rules
[TLP:WHITE] win_ranbyus_auto (20221125 | Detects win.ranbyus.)
rule win_ranbyus_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.ranbyus."
        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.ranbyus"
        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 = { 803c3e5c 75f5 8bc6 46 85c0 }
            // n = 5, score = 1100
            //   803c3e5c             | cmp                 byte ptr [esi + edi], 0x5c
            //   75f5                 | jne                 0xfffffff7
            //   8bc6                 | mov                 eax, esi
            //   46                   | inc                 esi
            //   85c0                 | test                eax, eax

        $sequence_1 = { 8bec 51 837d0c00 7513 68???????? ff7508 }
            // n = 6, score = 1100
            //   8bec                 | mov                 ebp, esp
            //   51                   | push                ecx
            //   837d0c00             | cmp                 dword ptr [ebp + 0xc], 0
            //   7513                 | jne                 0x15
            //   68????????           |                     
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_2 = { 8b4c2408 2b4c2404 0fafc1 c1e80f }
            // n = 4, score = 1100
            //   8b4c2408             | mov                 ecx, dword ptr [esp + 8]
            //   2b4c2404             | sub                 ecx, dword ptr [esp + 4]
            //   0fafc1               | imul                eax, ecx
            //   c1e80f               | shr                 eax, 0xf

        $sequence_3 = { e8???????? 50 e8???????? 59 33c0 c3 55 }
            // n = 7, score = 1100
            //   e8????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   33c0                 | xor                 eax, eax
            //   c3                   | ret                 
            //   55                   | push                ebp

        $sequence_4 = { 6a10 e8???????? 8bf0 59 85f6 741a }
            // n = 6, score = 1100
            //   6a10                 | push                0x10
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   59                   | pop                 ecx
            //   85f6                 | test                esi, esi
            //   741a                 | je                  0x1c

        $sequence_5 = { e8???????? 59 33c0 eb03 83c8ff }
            // n = 5, score = 1100
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   33c0                 | xor                 eax, eax
            //   eb03                 | jmp                 5
            //   83c8ff               | or                  eax, 0xffffffff

        $sequence_6 = { 85c0 7427 8b4818 85c9 740f 3b4c2404 }
            // n = 6, score = 1100
            //   85c0                 | test                eax, eax
            //   7427                 | je                  0x29
            //   8b4818               | mov                 ecx, dword ptr [eax + 0x18]
            //   85c9                 | test                ecx, ecx
            //   740f                 | je                  0x11
            //   3b4c2404             | cmp                 ecx, dword ptr [esp + 4]

        $sequence_7 = { e8???????? 59 897304 682c010000 }
            // n = 4, score = 1100
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   897304               | mov                 dword ptr [ebx + 4], esi
            //   682c010000           | push                0x12c

        $sequence_8 = { 740c 803c305c 7405 48 75f7 eb01 40 }
            // n = 7, score = 1100
            //   740c                 | je                  0xe
            //   803c305c             | cmp                 byte ptr [eax + esi], 0x5c
            //   7405                 | je                  7
            //   48                   | dec                 eax
            //   75f7                 | jne                 0xfffffff9
            //   eb01                 | jmp                 3
            //   40                   | inc                 eax

        $sequence_9 = { 8bc8 e8???????? 50 8d8500fcffff }
            // n = 4, score = 1100
            //   8bc8                 | mov                 ecx, eax
            //   e8????????           |                     
            //   50                   | push                eax
            //   8d8500fcffff         | lea                 eax, [ebp - 0x400]

    condition:
        7 of them and filesize < 638976
}
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