SYMBOLCOMMON_NAMEaka. SYNONYMS
win.simda (Back to overview)

Simda

aka: iBank

There is no description at this point.

References
2020-04-03Josh Stroschein
@online{stroschein:20200403:unpacking:f2daf3d, author = {Josh Stroschein}, title = {{Unpacking a Trojan with Ghidra and x64dbg}}, date = {2020-04-03}, url = {https://www.youtube.com/watch?v=u2HEGDzd8KM}, language = {English}, urldate = {2020-04-06} } Unpacking a Trojan with Ghidra and x64dbg
Simda
2019-09-09McAfeeThomas Roccia, Marc Rivero López, Chintan Shah
@online{roccia:20190909:evolution:baf3b6c, author = {Thomas Roccia and Marc Rivero López and Chintan Shah}, title = {{Evolution of Malware Sandbox Evasion Tactics – A Retrospective Study}}, date = {2019-09-09}, organization = {McAfee}, url = {https://www.mcafee.com/blogs/other-blogs/mcafee-labs/evolution-of-malware-sandbox-evasion-tactics-a-retrospective-study/}, language = {English}, urldate = {2020-08-30} } Evolution of Malware Sandbox Evasion Tactics – A Retrospective Study
Cutwail Dridex Dyre Kovter Locky Phorpiex Simda
2018-03-19SecraryLasha Khasaia
@online{khasaia:20180319:reversing:f6a3e7c, author = {Lasha Khasaia}, title = {{Reversing iBank Trojan [Injection Phase]}}, date = {2018-03-19}, organization = {Secrary}, url = {https://secrary.com/ReversingMalware/iBank/}, language = {English}, urldate = {2019-10-29} } Reversing iBank Trojan [Injection Phase]
Simda
2015-04-12Trend MicroTrend Micro
@online{micro:20150412:simda:162eaad, author = {Trend Micro}, title = {{SIMDA: A Botnet Takedown}}, date = {2015-04-12}, organization = {Trend Micro}, url = {https://blog.trendmicro.com/trendlabs-security-intelligence/simda-a-botnet-takedown/}, language = {English}, urldate = {2020-01-10} } SIMDA: A Botnet Takedown
Simda
Yara Rules
[TLP:WHITE] win_simda_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_simda_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.simda"
        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 = { 5b 7404 48 034d10 }
            // n = 4, score = 700
            //   5b                   | pop                 ebx
            //   7404                 | je                  6
            //   48                   | dec                 eax
            //   034d10               | add                 ecx, dword ptr [ebp + 0x10]

        $sequence_1 = { c1ef1f 03ce c1ea1f 0bc7 3bce }
            // n = 5, score = 700
            //   c1ef1f               | shr                 edi, 0x1f
            //   03ce                 | add                 ecx, esi
            //   c1ea1f               | shr                 edx, 0x1f
            //   0bc7                 | or                  eax, edi
            //   3bce                 | cmp                 ecx, esi

        $sequence_2 = { 894d08 8b5508 57 ff15???????? }
            // n = 4, score = 700
            //   894d08               | mov                 dword ptr [ebp + 8], ecx
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   57                   | push                edi
            //   ff15????????         |                     

        $sequence_3 = { 85db 7508 6a01 ff15???????? 8bc6 }
            // n = 5, score = 700
            //   85db                 | test                ebx, ebx
            //   7508                 | jne                 0xa
            //   6a01                 | push                1
            //   ff15????????         |                     
            //   8bc6                 | mov                 eax, esi

        $sequence_4 = { 8d85f8feffff 50 ffd7 8b1d???????? 6a00 }
            // n = 5, score = 700
            //   8d85f8feffff         | lea                 eax, [ebp - 0x108]
            //   50                   | push                eax
            //   ffd7                 | call                edi
            //   8b1d????????         |                     
            //   6a00                 | push                0

        $sequence_5 = { 80f903 7536 8b8de4feffff 83f905 750d 3985e8feffff 7523 }
            // n = 7, score = 700
            //   80f903               | cmp                 cl, 3
            //   7536                 | jne                 0x38
            //   8b8de4feffff         | mov                 ecx, dword ptr [ebp - 0x11c]
            //   83f905               | cmp                 ecx, 5
            //   750d                 | jne                 0xf
            //   3985e8feffff         | cmp                 dword ptr [ebp - 0x118], eax
            //   7523                 | jne                 0x25

        $sequence_6 = { 3bd0 7301 41 8b4508 0faff3 03f1 }
            // n = 6, score = 700
            //   3bd0                 | cmp                 edx, eax
            //   7301                 | jae                 3
            //   41                   | inc                 ecx
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   0faff3               | imul                esi, ebx
            //   03f1                 | add                 esi, ecx

        $sequence_7 = { 8d85b1feffff 6a00 50 a4 c685b0feffff00 e8???????? 8b5508 }
            // n = 7, score = 700
            //   8d85b1feffff         | lea                 eax, [ebp - 0x14f]
            //   6a00                 | push                0
            //   50                   | push                eax
            //   a4                   | movsb               byte ptr es:[edi], byte ptr [esi]
            //   c685b0feffff00       | mov                 byte ptr [ebp - 0x150], 0
            //   e8????????           |                     
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]

        $sequence_8 = { 8b38 f7d9 3b3c18 7301 41 }
            // n = 5, score = 700
            //   8b38                 | mov                 edi, dword ptr [eax]
            //   f7d9                 | neg                 ecx
            //   3b3c18               | cmp                 edi, dword ptr [eax + ebx]
            //   7301                 | jae                 3
            //   41                   | inc                 ecx

        $sequence_9 = { 8b1d???????? 83c40c 57 6a08 ffd3 8bf0 }
            // n = 6, score = 700
            //   8b1d????????         |                     
            //   83c40c               | add                 esp, 0xc
            //   57                   | push                edi
            //   6a08                 | push                8
            //   ffd3                 | call                ebx
            //   8bf0                 | mov                 esi, eax

    condition:
        7 of them and filesize < 1581056
}
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