SYMBOLCOMMON_NAMEaka. SYNONYMS
win.rockloader (Back to overview)

Rockloader


There is no description at this point.

References
2021-09-03Trend MicroMohamad Mokbel
@techreport{mokbel:20210903:state:df86499, author = {Mohamad Mokbel}, title = {{The State of SSL/TLS Certificate Usage in Malware C&C Communications}}, date = {2021-09-03}, institution = {Trend Micro}, url = {https://www.trendmicro.com/content/dam/trendmicro/global/en/research/21/i/ssl-tls-technical-brief/ssl-tls-technical-brief.pdf}, language = {English}, urldate = {2021-09-19} } The State of SSL/TLS Certificate Usage in Malware C&C Communications
AdWind ostap AsyncRAT BazarBackdoor BitRAT Buer Chthonic CloudEyE Cobalt Strike DCRat Dridex FindPOS GootKit Gozi IcedID ISFB Nanocore RAT Orcus RAT PandaBanker Qadars QakBot Quasar RAT Rockloader ServHelper Shifu SManager TorrentLocker TrickBot Vawtrak Zeus Zloader
2020-05-21Intel 471Intel 471
@online{471:20200521:brief:048d164, author = {Intel 471}, title = {{A brief history of TA505}}, date = {2020-05-21}, organization = {Intel 471}, url = {https://intel471.com/blog/a-brief-history-of-ta505}, language = {English}, urldate = {2022-02-14} } A brief history of TA505
AndroMut Bart Dridex FlawedAmmyy FlawedGrace Gandcrab Get2 GlobeImposter Jaff Kegotip Locky Necurs Philadephia Ransom Pony QuantLoader Rockloader SDBbot ServHelper Shifu Snatch TrickBot
2016-04-06ProofpointChris Wakelin
@online{wakelin:20160406:locky:c653996, author = {Chris Wakelin}, title = {{Locky Ransomware Is Becoming More Sophisticated - Cybercriminals Continue Email Campaign Innovation}}, date = {2016-04-06}, organization = {Proofpoint}, url = {https://www.proofpoint.com/us/threat-insight/post/Locky-Ransomware-Cybercriminals-Introduce-New-RockLoader-Malware}, language = {English}, urldate = {2019-12-20} } Locky Ransomware Is Becoming More Sophisticated - Cybercriminals Continue Email Campaign Innovation
Rockloader
Yara Rules
[TLP:WHITE] win_rockloader_auto (20220516 | Detects win.rockloader.)
rule win_rockloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.rockloader."
        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.rockloader"
        malpedia_rule_date = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { 33c9 eb03 33c9 41 0bf1 40 8a08 }
            // n = 7, score = 300
            //   33c9                 | xor                 ecx, ecx
            //   eb03                 | jmp                 5
            //   33c9                 | xor                 ecx, ecx
            //   41                   | inc                 ecx
            //   0bf1                 | or                  esi, ecx
            //   40                   | inc                 eax
            //   8a08                 | mov                 cl, byte ptr [eax]

        $sequence_1 = { 2bc6 8b75f0 03f8 8d46ff 394514 }
            // n = 5, score = 300
            //   2bc6                 | sub                 eax, esi
            //   8b75f0               | mov                 esi, dword ptr [ebp - 0x10]
            //   03f8                 | add                 edi, eax
            //   8d46ff               | lea                 eax, [esi - 1]
            //   394514               | cmp                 dword ptr [ebp + 0x14], eax

        $sequence_2 = { 8d44c1c9 eb11 80f961 7c47 80f966 7f42 0fbec9 }
            // n = 7, score = 300
            //   8d44c1c9             | lea                 eax, [ecx + eax*8 - 0x37]
            //   eb11                 | jmp                 0x13
            //   80f961               | cmp                 cl, 0x61
            //   7c47                 | jl                  0x49
            //   80f966               | cmp                 cl, 0x66
            //   7f42                 | jg                  0x44
            //   0fbec9               | movsx               ecx, cl

        $sequence_3 = { f6c444 7a2f 6a02 85f6 7408 }
            // n = 5, score = 300
            //   f6c444               | test                ah, 0x44
            //   7a2f                 | jp                  0x31
            //   6a02                 | push                2
            //   85f6                 | test                esi, esi
            //   7408                 | je                  0xa

        $sequence_4 = { 75f9 2bc2 8945f4 6bc003 56 }
            // n = 5, score = 300
            //   75f9                 | jne                 0xfffffffb
            //   2bc2                 | sub                 eax, edx
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   6bc003               | imul                eax, eax, 3
            //   56                   | push                esi

        $sequence_5 = { 33c9 2bc2 394d0c 0f95c1 03c8 }
            // n = 5, score = 300
            //   33c9                 | xor                 ecx, ecx
            //   2bc2                 | sub                 eax, edx
            //   394d0c               | cmp                 dword ptr [ebp + 0xc], ecx
            //   0f95c1               | setne               cl
            //   03c8                 | add                 ecx, eax

        $sequence_6 = { 48 390424 7317 48 }
            // n = 4, score = 300
            //   48                   | dec                 eax
            //   390424               | cmp                 dword ptr [esp], eax
            //   7317                 | jae                 0x19
            //   48                   | dec                 eax

        $sequence_7 = { eb03 c60608 46 47 8a07 3c22 0f85a9feffff }
            // n = 7, score = 300
            //   eb03                 | jmp                 5
            //   c60608               | mov                 byte ptr [esi], 8
            //   46                   | inc                 esi
            //   47                   | inc                 edi
            //   8a07                 | mov                 al, byte ptr [edi]
            //   3c22                 | cmp                 al, 0x22
            //   0f85a9feffff         | jne                 0xfffffeaf

        $sequence_8 = { ff750c e8???????? 8b4d08 8bd6 }
            // n = 4, score = 300
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   e8????????           |                     
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   8bd6                 | mov                 edx, esi

        $sequence_9 = { 8945f8 b8???????? 8945fc 8b45fc 2b45f8 8b4d08 }
            // n = 6, score = 300
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   b8????????           |                     
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   2b45f8               | sub                 eax, dword ptr [ebp - 8]
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]

    condition:
        7 of them and filesize < 98304
}
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