SYMBOLCOMMON_NAMEaka. SYNONYMS
win.rapid_ransom (Back to overview)

Rapid Ransom


There is no description at this point.

References
2020-02-28Financial Security InstituteFinancial Security Institute
@online{institute:20200228:profiling:ebaa39b, author = {Financial Security Institute}, title = {{Profiling of TA505 Threat Group That Continues to Attack the Financial Sector}}, date = {2020-02-28}, organization = {Financial Security Institute}, url = {https://www.fsec.or.kr/common/proc/fsec/bbs/163/fileDownLoad/2297.do}, language = {English}, urldate = {2020-02-28} } Profiling of TA505 Threat Group That Continues to Attack the Financial Sector
Amadey Clop FlawedAmmyy Rapid Ransom SDBbot TinyMet
2020-02-25RSA ConferenceJoel DeCapua
@online{decapua:20200225:feds:423f929, author = {Joel DeCapua}, title = {{Feds Fighting Ransomware: How the FBI Investigates and How You Can Help}}, date = {2020-02-25}, organization = {RSA Conference}, url = {https://www.youtube.com/watch?v=LUxOcpIRxmg}, language = {English}, urldate = {2020-03-04} } Feds Fighting Ransomware: How the FBI Investigates and How You Can Help
FastCash Cerber Defray Dharma FriedEx Gandcrab GlobeImposter Mamba Phobos Rapid Ransom REvil Ryuk SamSam Zeus
2019-07-24IBM X-Force ExchangeJohn Kuhn
@online{kuhn:20190724:guesswho:1b23cb0, author = {John Kuhn}, title = {{GuessWho Ransomware – A Variant of Rapid Ransomware}}, date = {2019-07-24}, organization = {IBM X-Force Exchange}, url = {https://exchange.xforce.ibmcloud.com/collection/GuessWho-Ransomware-A-Variant-of-Rapid-Ransomware-ef226b9792fa4c1e34fa4c587db04145}, language = {English}, urldate = {2020-01-10} } GuessWho Ransomware – A Variant of Rapid Ransomware
Rapid Ransom
2018-05-19Twitter (@malwrhunterteam)malwrhunterteam
@online{malwrhunterteam:20180519:rapid:b25afd8, author = {malwrhunterteam}, title = {{Tweet on Rapid 2 ransomware}}, date = {2018-05-19}, organization = {Twitter (@malwrhunterteam)}, url = {https://twitter.com/malwrhunterteam/status/997748495888076800}, language = {English}, urldate = {2020-01-06} } Tweet on Rapid 2 ransomware
Rapid Ransom
2018-03-23Twitter (MalwareHunterTeam)MalwareHunterTeam
@online{malwarehunterteam:20180323:rapid:31feb13, author = {MalwareHunterTeam}, title = {{Tweet on Rapid Ransomware 2.0}}, date = {2018-03-23}, organization = {Twitter (MalwareHunterTeam)}, url = {https://twitter.com/malwrhunterteam/status/977275481765613569}, language = {English}, urldate = {2019-12-10} } Tweet on Rapid Ransomware 2.0
Rapid Ransom
Yara Rules
[TLP:WHITE] win_rapid_ransom_auto (20211008 | Detects win.rapid_ransom.)
rule win_rapid_ransom_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-10-07"
        version = "1"
        description = "Detects win.rapid_ransom."
        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.rapid_ransom"
        malpedia_rule_date = "20211007"
        malpedia_hash = "e5b790e0f888f252d49063a1251ca60ec2832535"
        malpedia_version = "20211008"
        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 6801000004 6800a40000 ff75f8 ff15???????? }
            // n = 5, score = 300
            //   50                   | push                eax
            //   6801000004           | push                0x4000001
            //   6800a40000           | push                0xa400
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff15????????         |                     

        $sequence_1 = { 884de0 ff15???????? 83c410 8bc6 5f 5e 5b }
            // n = 7, score = 200
            //   884de0               | mov                 byte ptr [ebp - 0x20], cl
            //   ff15????????         |                     
            //   83c410               | add                 esp, 0x10
            //   8bc6                 | mov                 eax, esi
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx

        $sequence_2 = { 751d eb04 8b5c2410 8d442438 50 ff742420 ff15???????? }
            // n = 7, score = 200
            //   751d                 | jne                 0x1f
            //   eb04                 | jmp                 6
            //   8b5c2410             | mov                 ebx, dword ptr [esp + 0x10]
            //   8d442438             | lea                 eax, dword ptr [esp + 0x38]
            //   50                   | push                eax
            //   ff742420             | push                dword ptr [esp + 0x20]
            //   ff15????????         |                     

        $sequence_3 = { ffd6 50 57 53 e8???????? 83c40c 53 }
            // n = 7, score = 200
            //   ffd6                 | call                esi
            //   50                   | push                eax
            //   57                   | push                edi
            //   53                   | push                ebx
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   53                   | push                ebx

        $sequence_4 = { 50 6a10 6a01 8974243c e8???????? 83c410 5f }
            // n = 7, score = 200
            //   50                   | push                eax
            //   6a10                 | push                0x10
            //   6a01                 | push                1
            //   8974243c             | mov                 dword ptr [esp + 0x3c], esi
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   5f                   | pop                 edi

        $sequence_5 = { 50 ff75ec 6a00 6a01 6a00 ff75fc }
            // n = 6, score = 200
            //   50                   | push                eax
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   6a00                 | push                0
            //   6a01                 | push                1
            //   6a00                 | push                0
            //   ff75fc               | push                dword ptr [ebp - 4]

        $sequence_6 = { 56 57 33ff be???????? ffd3 57 }
            // n = 6, score = 200
            //   56                   | push                esi
            //   57                   | push                edi
            //   33ff                 | xor                 edi, edi
            //   be????????           |                     
            //   ffd3                 | call                ebx
            //   57                   | push                edi

        $sequence_7 = { 6a00 6a00 ff75ec ff75e8 }
            // n = 4, score = 200
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   ff75e8               | push                dword ptr [ebp - 0x18]

        $sequence_8 = { 53 ff15???????? 6840010000 8d44243c 6a00 50 }
            // n = 6, score = 200
            //   53                   | push                ebx
            //   ff15????????         |                     
            //   6840010000           | push                0x140
            //   8d44243c             | lea                 eax, dword ptr [esp + 0x3c]
            //   6a00                 | push                0
            //   50                   | push                eax

        $sequence_9 = { 803800 7419 41 83c01c 3bca 7cf3 }
            // n = 6, score = 100
            //   803800               | cmp                 byte ptr [eax], 0
            //   7419                 | je                  0x1b
            //   41                   | inc                 ecx
            //   83c01c               | add                 eax, 0x1c
            //   3bca                 | cmp                 ecx, edx
            //   7cf3                 | jl                  0xfffffff5

        $sequence_10 = { 8b8e78040000 8d0441 3bc8 7320 0fb748fe 8bd1 83fa2f }
            // n = 7, score = 100
            //   8b8e78040000         | mov                 ecx, dword ptr [esi + 0x478]
            //   8d0441               | lea                 eax, dword ptr [ecx + eax*2]
            //   3bc8                 | cmp                 ecx, eax
            //   7320                 | jae                 0x22
            //   0fb748fe             | movzx               ecx, word ptr [eax - 2]
            //   8bd1                 | mov                 edx, ecx
            //   83fa2f               | cmp                 edx, 0x2f

        $sequence_11 = { 5d e9???????? e9???????? 55 8bec eb0d ff7508 }
            // n = 7, score = 100
            //   5d                   | pop                 ebp
            //   e9????????           |                     
            //   e9????????           |                     
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   eb0d                 | jmp                 0xf
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_12 = { 894de0 c745e484824100 e9???????? c745e003000000 }
            // n = 4, score = 100
            //   894de0               | mov                 dword ptr [ebp - 0x20], ecx
            //   c745e484824100       | mov                 dword ptr [ebp - 0x1c], 0x418284
            //   e9????????           |                     
            //   c745e003000000       | mov                 dword ptr [ebp - 0x20], 3

        $sequence_13 = { 83c404 33c0 5e 5f 5b 8b4dfc }
            // n = 6, score = 100
            //   83c404               | add                 esp, 4
            //   33c0                 | xor                 eax, eax
            //   5e                   | pop                 esi
            //   5f                   | pop                 edi
            //   5b                   | pop                 ebx
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]

        $sequence_14 = { 6805010000 51 6805010000 8d45f8 }
            // n = 4, score = 100
            //   6805010000           | push                0x105
            //   51                   | push                ecx
            //   6805010000           | push                0x105
            //   8d45f8               | lea                 eax, dword ptr [ebp - 8]

    condition:
        7 of them and filesize < 286720
}
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