SYMBOLCOMMON_NAMEaka. SYNONYMS
win.snifula (Back to overview)

Snifula

aka: Ursnif

There is no description at this point.

References
2021-05-11Mal-Eatsmal_eats
@online{maleats:20210511:campo:0305ab9, author = {mal_eats}, title = {{Campo, a New Attack Campaign Targeting Japan}}, date = {2021-05-11}, organization = {Mal-Eats}, url = {https://mal-eats.net/en/2021/05/11/campo_new_attack_campaign_targeting_japan/}, language = {English}, urldate = {2021-06-01} } Campo, a New Attack Campaign Targeting Japan
AnchorDNS BazarBackdoor campoloader Cobalt Strike Phobos Snifula TrickBot Zloader
2021-02-03ZDNetCharlie Osborne
@online{osborne:20210203:ursnif:936317a, author = {Charlie Osborne}, title = {{Ursnif Trojan has targeted over 100 Italian banks}}, date = {2021-02-03}, organization = {ZDNet}, url = {https://www.zdnet.com/article/ursnif-trojan-has-targeted-over-100-italian-banks/}, language = {English}, urldate = {2021-06-29} } Ursnif Trojan has targeted over 100 Italian banks
ISFB Snifula
2020-11-27malware.loveRobert Giczewski
@online{giczewski:20201127:having:7cd6ae8, author = {Robert Giczewski}, title = {{Having fun with a Ursnif VBS dropper}}, date = {2020-11-27}, organization = {malware.love}, url = {https://malware.love/malware_analysis/reverse_engineering/2020/11/27/analyzing-a-vbs-dropper.html}, language = {English}, urldate = {2020-12-01} } Having fun with a Ursnif VBS dropper
ISFB Snifula
2020-07-23DarktraceMax Heinemeyer
@online{heinemeyer:20200723:resurgence:75f36ef, author = {Max Heinemeyer}, title = {{The resurgence of the Ursnif banking trojan}}, date = {2020-07-23}, organization = {Darktrace}, url = {https://www.darktrace.com/en/blog/the-resurgence-of-the-ursnif-banking-trojan/}, language = {English}, urldate = {2021-06-29} } The resurgence of the Ursnif banking trojan
ISFB Snifula
2013-05-29CIRCLCIRCL
@techreport{circl:20130529:malware:cd9f6f8, author = {CIRCL}, title = {{Malware analysis report of a Backdoor.Snifula variant}}, date = {2013-05-29}, institution = {CIRCL}, url = {https://www.circl.lu/assets/files/tr-13/tr-13-snifula-analysis-report-v1.3.pdf}, language = {English}, urldate = {2019-07-11} } Malware analysis report of a Backdoor.Snifula variant
Snifula
Yara Rules
[TLP:WHITE] win_snifula_auto (20221125 | Detects win.snifula.)
rule win_snifula_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.snifula."
        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.snifula"
        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 = { 6805010000 53 ff35???????? ffd6 89442414 3bc3 7477 }
            // n = 7, score = 200
            //   6805010000           | push                0x105
            //   53                   | push                ebx
            //   ff35????????         |                     
            //   ffd6                 | call                esi
            //   89442414             | mov                 dword ptr [esp + 0x14], eax
            //   3bc3                 | cmp                 eax, ebx
            //   7477                 | je                  0x79

        $sequence_1 = { 56 33ff 57 ff35???????? 897dfc ff15???????? 8945f8 }
            // n = 7, score = 200
            //   56                   | push                esi
            //   33ff                 | xor                 edi, edi
            //   57                   | push                edi
            //   ff35????????         |                     
            //   897dfc               | mov                 dword ptr [ebp - 4], edi
            //   ff15????????         |                     
            //   8945f8               | mov                 dword ptr [ebp - 8], eax

        $sequence_2 = { ff742418 56 ff15???????? 6a5c 53 56 ff15???????? }
            // n = 7, score = 200
            //   ff742418             | push                dword ptr [esp + 0x18]
            //   56                   | push                esi
            //   ff15????????         |                     
            //   6a5c                 | push                0x5c
            //   53                   | push                ebx
            //   56                   | push                esi
            //   ff15????????         |                     

        $sequence_3 = { 833800 75f3 89993c010000 33c0 e9???????? 6a11 5f }
            // n = 7, score = 200
            //   833800               | cmp                 dword ptr [eax], 0
            //   75f3                 | jne                 0xfffffff5
            //   89993c010000         | mov                 dword ptr [ecx + 0x13c], ebx
            //   33c0                 | xor                 eax, eax
            //   e9????????           |                     
            //   6a11                 | push                0x11
            //   5f                   | pop                 edi

        $sequence_4 = { ff15???????? 89442410 ff742414 ff15???????? 5d ff742414 ff15???????? }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   89442410             | mov                 dword ptr [esp + 0x10], eax
            //   ff742414             | push                dword ptr [esp + 0x14]
            //   ff15????????         |                     
            //   5d                   | pop                 ebp
            //   ff742414             | push                dword ptr [esp + 0x14]
            //   ff15????????         |                     

        $sequence_5 = { ff15???????? ff742404 50 ff15???????? 8b4c2408 }
            // n = 5, score = 200
            //   ff15????????         |                     
            //   ff742404             | push                dword ptr [esp + 4]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b4c2408             | mov                 ecx, dword ptr [esp + 8]

        $sequence_6 = { 56 b8???????? 41 f00fc108 8b750c 85f6 0f84cb000000 }
            // n = 7, score = 200
            //   56                   | push                esi
            //   b8????????           |                     
            //   41                   | inc                 ecx
            //   f00fc108             | lock xadd           dword ptr [eax], ecx
            //   8b750c               | mov                 esi, dword ptr [ebp + 0xc]
            //   85f6                 | test                esi, esi
            //   0f84cb000000         | je                  0xd1

        $sequence_7 = { 2bf8 51 8bc6 e8???????? 5f 5b c9 }
            // n = 7, score = 200
            //   2bf8                 | sub                 edi, eax
            //   51                   | push                ecx
            //   8bc6                 | mov                 eax, esi
            //   e8????????           |                     
            //   5f                   | pop                 edi
            //   5b                   | pop                 ebx
            //   c9                   | leave               

        $sequence_8 = { 55 680c010000 8bd8 e8???????? 55 8b2d???????? 33db }
            // n = 7, score = 200
            //   55                   | push                ebp
            //   680c010000           | push                0x10c
            //   8bd8                 | mov                 ebx, eax
            //   e8????????           |                     
            //   55                   | push                ebp
            //   8b2d????????         |                     
            //   33db                 | xor                 ebx, ebx

        $sequence_9 = { c745f002000000 ff15???????? 85c0 7ed8 8d45f0 50 ff750c }
            // n = 7, score = 200
            //   c745f002000000       | mov                 dword ptr [ebp - 0x10], 2
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7ed8                 | jle                 0xffffffda
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax
            //   ff750c               | push                dword ptr [ebp + 0xc]

    condition:
        7 of them and filesize < 188416
}
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