SYMBOLCOMMON_NAMEaka. SYNONYMS
win.simplefilemover (Back to overview)

SimpleFileMover


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References
2014-02-14SecureworksCounter Threat Unit ResearchTeam
@online{researchteam:20140214:analysis:0417082, author = {Counter Threat Unit ResearchTeam}, title = {{Analysis of DHS NCCIC Indicators}}, date = {2014-02-14}, organization = {Secureworks}, url = {https://www.secureworks.com/research/analysis-of-dhs-nccic-indicators}, language = {English}, urldate = {2020-05-26} } Analysis of DHS NCCIC Indicators
jspRAT BeepService DDKeylogger LinseningSvr ONHAT SimpleFileMover ZiyangRAT
Yara Rules
[TLP:WHITE] win_simplefilemover_auto (20201023 | autogenerated rule brought to you by yara-signator)
rule win_simplefilemover_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.simplefilemover"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { 8bfc f3a5 e8???????? 81c420020000 }
            // n = 4, score = 500
            //   8bfc                 | mov                 edi, esp
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   e8????????           |                     
            //   81c420020000         | add                 esp, 0x220

        $sequence_1 = { 7d07 33c0 e9???????? 6820020000 ff15???????? }
            // n = 5, score = 400
            //   7d07                 | jge                 9
            //   33c0                 | xor                 eax, eax
            //   e9????????           |                     
            //   6820020000           | push                0x220
            //   ff15????????         |                     

        $sequence_2 = { e8???????? 81c420020000 85c0 7407 }
            // n = 4, score = 300
            //   e8????????           |                     
            //   81c420020000         | add                 esp, 0x220
            //   85c0                 | test                eax, eax
            //   7407                 | je                  9

        $sequence_3 = { b988000000 8bf3 8bfc f3a5 }
            // n = 4, score = 300
            //   b988000000           | mov                 ecx, 0x88
            //   8bf3                 | mov                 esi, ebx
            //   8bfc                 | mov                 edi, esp
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]

        $sequence_4 = { 5b c9 c3 56 8b742410 57 56 }
            // n = 7, score = 200
            //   5b                   | pop                 ebx
            //   c9                   | leave               
            //   c3                   | ret                 
            //   56                   | push                esi
            //   8b742410             | mov                 esi, dword ptr [esp + 0x10]
            //   57                   | push                edi
            //   56                   | push                esi

        $sequence_5 = { 668b4102 83c102 42 6685c0 75ea 85f6 7417 }
            // n = 7, score = 200
            //   668b4102             | mov                 ax, word ptr [ecx + 2]
            //   83c102               | add                 ecx, 2
            //   42                   | inc                 edx
            //   6685c0               | test                ax, ax
            //   75ea                 | jne                 0xffffffec
            //   85f6                 | test                esi, esi
            //   7417                 | je                  0x19

        $sequence_6 = { 0f8c54ffffff 8a4c242c 5d 5b 5f }
            // n = 5, score = 200
            //   0f8c54ffffff         | jl                  0xffffff5a
            //   8a4c242c             | mov                 cl, byte ptr [esp + 0x2c]
            //   5d                   | pop                 ebp
            //   5b                   | pop                 ebx
            //   5f                   | pop                 edi

        $sequence_7 = { ebc2 ebc0 ebbe ebbc ebba ebb8 ebb6 }
            // n = 7, score = 200
            //   ebc2                 | jmp                 0xffffffc4
            //   ebc0                 | jmp                 0xffffffc2
            //   ebbe                 | jmp                 0xffffffc0
            //   ebbc                 | jmp                 0xffffffbe
            //   ebba                 | jmp                 0xffffffbc
            //   ebb8                 | jmp                 0xffffffba
            //   ebb6                 | jmp                 0xffffffb8

        $sequence_8 = { ebc8 ebc6 ebc4 ebc2 ebc0 }
            // n = 5, score = 200
            //   ebc8                 | jmp                 0xffffffca
            //   ebc6                 | jmp                 0xffffffc8
            //   ebc4                 | jmp                 0xffffffc6
            //   ebc2                 | jmp                 0xffffffc4
            //   ebc0                 | jmp                 0xffffffc2

        $sequence_9 = { 898508daffff 81bd08daffff40270000 7407 33c0 }
            // n = 4, score = 200
            //   898508daffff         | mov                 dword ptr [ebp - 0x25f8], eax
            //   81bd08daffff40270000     | cmp    dword ptr [ebp - 0x25f8], 0x2740
            //   7407                 | je                  9
            //   33c0                 | xor                 eax, eax

        $sequence_10 = { 68???????? 8d85a4ddffff 56 50 }
            // n = 4, score = 200
            //   68????????           |                     
            //   8d85a4ddffff         | lea                 eax, [ebp - 0x225c]
            //   56                   | push                esi
            //   50                   | push                eax

        $sequence_11 = { 56 8b74241c 57 8a8800010000 8a9001010000 33ff 884c2408 }
            // n = 7, score = 200
            //   56                   | push                esi
            //   8b74241c             | mov                 esi, dword ptr [esp + 0x1c]
            //   57                   | push                edi
            //   8a8800010000         | mov                 cl, byte ptr [eax + 0x100]
            //   8a9001010000         | mov                 dl, byte ptr [eax + 0x101]
            //   33ff                 | xor                 edi, edi
            //   884c2408             | mov                 byte ptr [esp + 8], cl

        $sequence_12 = { 8b542414 53 52 ff15???????? 83c408 5f }
            // n = 6, score = 200
            //   8b542414             | mov                 edx, dword ptr [esp + 0x14]
            //   53                   | push                ebx
            //   52                   | push                edx
            //   ff15????????         |                     
            //   83c408               | add                 esp, 8
            //   5f                   | pop                 edi

        $sequence_13 = { 50 ff15???????? 898510daffff 6a00 6a00 8b8d10daffff }
            // n = 6, score = 200
            //   50                   | push                eax
            //   ff15????????         |                     
            //   898510daffff         | mov                 dword ptr [ebp - 0x25f0], eax
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   8b8d10daffff         | mov                 ecx, dword ptr [ebp - 0x25f0]

        $sequence_14 = { ff75f0 ff15???????? 8b45e8 0345d4 8945e8 }
            // n = 5, score = 200
            //   ff75f0               | push                dword ptr [ebp - 0x10]
            //   ff15????????         |                     
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   0345d4               | add                 eax, dword ptr [ebp - 0x2c]
            //   8945e8               | mov                 dword ptr [ebp - 0x18], eax

        $sequence_15 = { 8d8d54daffff 51 e8???????? 83c408 6a04 }
            // n = 5, score = 200
            //   8d8d54daffff         | lea                 ecx, [ebp - 0x25ac]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   6a04                 | push                4

        $sequence_16 = { ff15???????? 83c404 c78508daffff00000000 e9???????? 6a00 6a04 8d8d54daffff }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   83c404               | add                 esp, 4
            //   c78508daffff00000000     | mov    dword ptr [ebp - 0x25f8], 0
            //   e9????????           |                     
            //   6a00                 | push                0
            //   6a04                 | push                4
            //   8d8d54daffff         | lea                 ecx, [ebp - 0x25ac]

        $sequence_17 = { 8bcb 663d5c00 7503 8bfa 46 668b4102 }
            // n = 6, score = 200
            //   8bcb                 | mov                 ecx, ebx
            //   663d5c00             | cmp                 ax, 0x5c
            //   7503                 | jne                 5
            //   8bfa                 | mov                 edi, edx
            //   46                   | inc                 esi
            //   668b4102             | mov                 ax, word ptr [ecx + 2]

        $sequence_18 = { 3bf7 88542424 897c2410 0f8eda000000 8b4c2408 }
            // n = 5, score = 200
            //   3bf7                 | cmp                 esi, edi
            //   88542424             | mov                 byte ptr [esp + 0x24], dl
            //   897c2410             | mov                 dword ptr [esp + 0x10], edi
            //   0f8eda000000         | jle                 0xe0
            //   8b4c2408             | mov                 ecx, dword ptr [esp + 8]

        $sequence_19 = { 888801010000 5e 83c410 c3 5f 888800010000 }
            // n = 6, score = 200
            //   888801010000         | mov                 byte ptr [eax + 0x101], cl
            //   5e                   | pop                 esi
            //   83c410               | add                 esp, 0x10
            //   c3                   | ret                 
            //   5f                   | pop                 edi
            //   888800010000         | mov                 byte ptr [eax + 0x100], cl

        $sequence_20 = { ff15???????? 83f8ff 7463 8b35???????? 53 8d85a4ddffff }
            // n = 6, score = 200
            //   ff15????????         |                     
            //   83f8ff               | cmp                 eax, -1
            //   7463                 | je                  0x65
            //   8b35????????         |                     
            //   53                   | push                ebx
            //   8d85a4ddffff         | lea                 eax, [ebp - 0x225c]

        $sequence_21 = { 81cb00ffffff 43 885c242c 8a5c241c }
            // n = 4, score = 200
            //   81cb00ffffff         | or                  ebx, 0xffffff00
            //   43                   | inc                 ebx
            //   885c242c             | mov                 byte ptr [esp + 0x2c], bl
            //   8a5c241c             | mov                 bl, byte ptr [esp + 0x1c]

    condition:
        7 of them and filesize < 57344
}
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