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 (20230125 | Detects win.ranbyus.)
rule win_ranbyus_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { ff7608 e8???????? 89460c 8b06 59 894604 }
            // n = 6, score = 1100
            //   ff7608               | push                dword ptr [esi + 8]
            //   e8????????           |                     
            //   89460c               | mov                 dword ptr [esi + 0xc], eax
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   59                   | pop                 ecx
            //   894604               | mov                 dword ptr [esi + 4], eax

        $sequence_1 = { a1???????? 85c0 751c 6a04 e8???????? }
            // n = 5, score = 1100
            //   a1????????           |                     
            //   85c0                 | test                eax, eax
            //   751c                 | jne                 0x1e
            //   6a04                 | push                4
            //   e8????????           |                     

        $sequence_2 = { 59 ff7608 e8???????? 897e08 }
            // n = 4, score = 1100
            //   59                   | pop                 ecx
            //   ff7608               | push                dword ptr [esi + 8]
            //   e8????????           |                     
            //   897e08               | mov                 dword ptr [esi + 8], edi

        $sequence_3 = { e8???????? 59 8b4e05 89410b 8b4605 39780b 7407 }
            // n = 7, score = 1100
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8b4e05               | mov                 ecx, dword ptr [esi + 5]
            //   89410b               | mov                 dword ptr [ecx + 0xb], eax
            //   8b4605               | mov                 eax, dword ptr [esi + 5]
            //   39780b               | cmp                 dword ptr [eax + 0xb], edi
            //   7407                 | je                  9

        $sequence_4 = { a3???????? 8a4576 a2???????? 8b45e8 a3???????? }
            // n = 5, score = 1100
            //   a3????????           |                     
            //   8a4576               | mov                 al, byte ptr [ebp + 0x76]
            //   a2????????           |                     
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   a3????????           |                     

        $sequence_5 = { a3???????? 8a4576 a2???????? 8b45e8 a3???????? e8???????? }
            // n = 6, score = 1100
            //   a3????????           |                     
            //   8a4576               | mov                 al, byte ptr [ebp + 0x76]
            //   a2????????           |                     
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   a3????????           |                     
            //   e8????????           |                     

        $sequence_6 = { 0f84c5000000 3c5c 75f1 84c0 0f84b9000000 46 }
            // n = 6, score = 1100
            //   0f84c5000000         | je                  0xcb
            //   3c5c                 | cmp                 al, 0x5c
            //   75f1                 | jne                 0xfffffff3
            //   84c0                 | test                al, al
            //   0f84b9000000         | je                  0xbf
            //   46                   | inc                 esi

        $sequence_7 = { 751b 46 8a06 84c0 740c }
            // n = 5, score = 1100
            //   751b                 | jne                 0x1d
            //   46                   | inc                 esi
            //   8a06                 | mov                 al, byte ptr [esi]
            //   84c0                 | test                al, al
            //   740c                 | je                  0xe

        $sequence_8 = { 7405 48 75f7 eb01 }
            // n = 4, score = 1100
            //   7405                 | je                  7
            //   48                   | dec                 eax
            //   75f7                 | jne                 0xfffffff9
            //   eb01                 | jmp                 3

        $sequence_9 = { 5f eb03 83c8ff 5e 5b c3 e8???????? }
            // n = 7, score = 1100
            //   5f                   | pop                 edi
            //   eb03                 | jmp                 5
            //   83c8ff               | or                  eax, 0xffffffff
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   c3                   | ret                 
            //   e8????????           |                     

    condition:
        7 of them and filesize < 638976
}
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