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://blog.intel471.com/2020/05/21/a-brief-history-of-ta505/}, language = {English}, urldate = {2020-05-23} } 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 (20210616 | Detects win.rockloader.)
rule win_rockloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        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 = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 50 be04010000 56 ff15???????? 33ff }
            // n = 5, score = 300
            //   50                   | push                eax
            //   be04010000           | mov                 esi, 0x104
            //   56                   | push                esi
            //   ff15????????         |                     
            //   33ff                 | xor                 edi, edi

        $sequence_1 = { 59 8bc1 03f1 48 742d 48 }
            // n = 6, score = 300
            //   59                   | pop                 ecx
            //   8bc1                 | mov                 eax, ecx
            //   03f1                 | add                 esi, ecx
            //   48                   | dec                 eax
            //   742d                 | je                  0x2f
            //   48                   | dec                 eax

        $sequence_2 = { 8a06 3c22 750c ff7508 8bc6 e8???????? }
            // n = 6, score = 300
            //   8a06                 | mov                 al, byte ptr [esi]
            //   3c22                 | cmp                 al, 0x22
            //   750c                 | jne                 0xe
            //   ff7508               | push                dword ptr [ebp + 8]
            //   8bc6                 | mov                 eax, esi
            //   e8????????           |                     

        $sequence_3 = { 53 53 53 53 53 8d8590fdffff }
            // n = 6, score = 300
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   8d8590fdffff         | lea                 eax, dword ptr [ebp - 0x270]

        $sequence_4 = { 83ec18 48 c7042400000000 eb0b 48 8b0424 48 }
            // n = 7, score = 300
            //   83ec18               | sub                 esp, 0x18
            //   48                   | dec                 eax
            //   c7042400000000       | mov                 dword ptr [esp], 0
            //   eb0b                 | jmp                 0xd
            //   48                   | dec                 eax
            //   8b0424               | mov                 eax, dword ptr [esp]
            //   48                   | dec                 eax

        $sequence_5 = { e8???????? 33f6 53 8975f8 }
            // n = 4, score = 300
            //   e8????????           |                     
            //   33f6                 | xor                 esi, esi
            //   53                   | push                ebx
            //   8975f8               | mov                 dword ptr [ebp - 8], esi

        $sequence_6 = { 8b4f10 83671000 894f20 80383a 7407 }
            // n = 5, score = 300
            //   8b4f10               | mov                 ecx, dword ptr [edi + 0x10]
            //   83671000             | and                 dword ptr [edi + 0x10], 0
            //   894f20               | mov                 dword ptr [edi + 0x20], ecx
            //   80383a               | cmp                 byte ptr [eax], 0x3a
            //   7407                 | je                  9

        $sequence_7 = { 3b75f4 7ce9 ff75f8 ff15???????? e9???????? }
            // n = 5, score = 300
            //   3b75f4               | cmp                 esi, dword ptr [ebp - 0xc]
            //   7ce9                 | jl                  0xffffffeb
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff15????????         |                     
            //   e9????????           |                     

        $sequence_8 = { 83c706 81f9ff030000 0f8796000000 b9ff030000 23d9 c1e30a 23c1 }
            // n = 7, score = 300
            //   83c706               | add                 edi, 6
            //   81f9ff030000         | cmp                 ecx, 0x3ff
            //   0f8796000000         | ja                  0x9c
            //   b9ff030000           | mov                 ecx, 0x3ff
            //   23d9                 | and                 ebx, ecx
            //   c1e30a               | shl                 ebx, 0xa
            //   23c1                 | and                 eax, ecx

        $sequence_9 = { dfe0 f6c441 7a54 dd05???????? dc5df8 dfe0 }
            // n = 6, score = 300
            //   dfe0                 | fnstsw              ax
            //   f6c441               | test                ah, 0x41
            //   7a54                 | jp                  0x56
            //   dd05????????         |                     
            //   dc5df8               | fcomp               qword ptr [ebp - 8]
            //   dfe0                 | fnstsw              ax

    condition:
        7 of them and filesize < 98304
}
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