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://securingtomorrow.mcafee.com/other-blogs/mcafee-labs/evolution-of-malware-sandbox-evasion-tactics-a-retrospective-study/}, language = {English}, urldate = {2020-01-10} } 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 (20200529 | autogenerated rule brought to you by yara-signator)
rule win_simda_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-05-30"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.simda"
        malpedia_rule_date = "20200529"
        malpedia_hash = "92c362319514e5a6da26204961446caa3a8b32a8"
        malpedia_version = "20200529"
        malpedia_license = "CC BY-NC-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 / approach 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 = { 8b15???????? 8b0d???????? 8945d4 a1???????? }
            // n = 4, score = 700
            //   8b15????????         |                     
            //   8b0d????????         |                     
            //   8945d4               | mov                 dword ptr [ebp - 0x2c], eax
            //   a1????????           |                     

        $sequence_2 = { 7301 42 8b75e4 8b3e 03cf 3bcf 7304 }
            // n = 7, score = 700
            //   7301                 | jae                 3
            //   42                   | inc                 edx
            //   8b75e4               | mov                 esi, dword ptr [ebp - 0x1c]
            //   8b3e                 | mov                 edi, dword ptr [esi]
            //   03cf                 | add                 ecx, edi
            //   3bcf                 | cmp                 ecx, edi
            //   7304                 | jae                 6

        $sequence_3 = { c7450800000000 ff15???????? 85c0 740d }
            // n = 4, score = 700
            //   c7450800000000       | mov                 dword ptr [ebp + 8], 0
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   740d                 | je                  0xf

        $sequence_4 = { 8b0c30 3b0e 750d 83ef04 83c604 83ff04 }
            // n = 6, score = 700
            //   8b0c30               | mov                 ecx, dword ptr [eax + esi]
            //   3b0e                 | cmp                 ecx, dword ptr [esi]
            //   750d                 | jne                 0xf
            //   83ef04               | sub                 edi, 4
            //   83c604               | add                 esi, 4
            //   83ff04               | cmp                 edi, 4

        $sequence_5 = { 52 ffd7 85c0 740c 68???????? }
            // n = 5, score = 700
            //   52                   | push                edx
            //   ffd7                 | call                edi
            //   85c0                 | test                eax, eax
            //   740c                 | je                  0xe
            //   68????????           |                     

        $sequence_6 = { 7518 d1e8 85d0 7515 d1e8 85d0 }
            // n = 6, score = 700
            //   7518                 | jne                 0x1a
            //   d1e8                 | shr                 eax, 1
            //   85d0                 | test                eax, edx
            //   7515                 | jne                 0x17
            //   d1e8                 | shr                 eax, 1
            //   85d0                 | test                eax, edx

        $sequence_7 = { 7c02 33c0 41 81f900010000 7ce2 }
            // n = 5, score = 700
            //   7c02                 | jl                  4
            //   33c0                 | xor                 eax, eax
            //   41                   | inc                 ecx
            //   81f900010000         | cmp                 ecx, 0x100
            //   7ce2                 | jl                  0xffffffe4

        $sequence_8 = { 81ec08010000 56 8d45fc 33f6 }
            // n = 4, score = 700
            //   81ec08010000         | sub                 esp, 0x108
            //   56                   | push                esi
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   33f6                 | xor                 esi, esi

        $sequence_9 = { 85c0 75dd 8b4d0c 8bc3 2bc2 }
            // n = 5, score = 700
            //   85c0                 | test                eax, eax
            //   75dd                 | jne                 0xffffffdf
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   8bc3                 | mov                 eax, ebx
            //   2bc2                 | sub                 eax, edx

    condition:
        7 of them and filesize < 1581056
}
Download all Yara Rules