SYMBOLCOMMON_NAMEaka. SYNONYMS
win.sendsafe (Back to overview)

SendSafe

URLhaus    

There is no description at this point.

References
2021-01-10Medium walmartglobaltechJason Reaves
@online{reaves:20210110:man1:54a4162, author = {Jason Reaves}, title = {{MAN1, Moskal, Hancitor and a side of Ransomware}}, date = {2021-01-10}, organization = {Medium walmartglobaltech}, url = {https://medium.com/walmartglobaltech/man1-moskal-hancitor-and-a-side-of-ransomware-d77b4d991618}, language = {English}, urldate = {2021-01-11} } MAN1, Moskal, Hancitor and a side of Ransomware
Cobalt Strike Hancitor SendSafe VegaLocker
2017-10-06CERT.PLMaciej Kotowicz, Jarosław Jedynak
@techreport{kotowicz:20171006:peering:668c82e, author = {Maciej Kotowicz and Jarosław Jedynak}, title = {{Peering into spam botnets}}, date = {2017-10-06}, institution = {CERT.PL}, url = {https://lokalhost.pl/txt/peering.into.spam.botnets.VirusBulletin2017.pdf}, language = {English}, urldate = {2020-04-06} } Peering into spam botnets
Emotet Kelihos Necurs SendSafe Tofsee
Yara Rules
[TLP:WHITE] win_sendsafe_auto (20210616 | Detects win.sendsafe.)
rule win_sendsafe_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.sendsafe."
        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.sendsafe"
        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 = { 8d841100400000 c1f80f b904000000 6bd138 8b4dfc 890411 8b55e8 }
            // n = 7, score = 200
            //   8d841100400000       | lea                 eax, dword ptr [ecx + edx + 0x4000]
            //   c1f80f               | sar                 eax, 0xf
            //   b904000000           | mov                 ecx, 4
            //   6bd138               | imul                edx, ecx, 0x38
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   890411               | mov                 dword ptr [ecx + edx], eax
            //   8b55e8               | mov                 edx, dword ptr [ebp - 0x18]

        $sequence_1 = { e8???????? 83c40c c7474400000000 83bf9001000002 753a 6a02 57 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   c7474400000000       | mov                 dword ptr [edi + 0x44], 0
            //   83bf9001000002       | cmp                 dword ptr [edi + 0x190], 2
            //   753a                 | jne                 0x3c
            //   6a02                 | push                2
            //   57                   | push                edi

        $sequence_2 = { e9???????? c645fc00 8d8dc0eeffff e8???????? 8b15???????? 52 8b4508 }
            // n = 7, score = 200
            //   e9????????           |                     
            //   c645fc00             | mov                 byte ptr [ebp - 4], 0
            //   8d8dc0eeffff         | lea                 ecx, dword ptr [ebp - 0x1140]
            //   e8????????           |                     
            //   8b15????????         |                     
            //   52                   | push                edx
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]

        $sequence_3 = { f7ff 55 8b6c2458 8bf0 33c0 89742414 83ff01 }
            // n = 7, score = 200
            //   f7ff                 | idiv                edi
            //   55                   | push                ebp
            //   8b6c2458             | mov                 ebp, dword ptr [esp + 0x58]
            //   8bf0                 | mov                 esi, eax
            //   33c0                 | xor                 eax, eax
            //   89742414             | mov                 dword ptr [esp + 0x14], esi
            //   83ff01               | cmp                 edi, 1

        $sequence_4 = { 8b4d08 51 e8???????? 83c410 e9???????? e9???????? e9???????? }
            // n = 7, score = 200
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   e9????????           |                     
            //   e9????????           |                     
            //   e9????????           |                     

        $sequence_5 = { e8???????? 8b45e8 8945c8 8b4dc8 894dec c745fc00000000 8b55ec }
            // n = 7, score = 200
            //   e8????????           |                     
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   8945c8               | mov                 dword ptr [ebp - 0x38], eax
            //   8b4dc8               | mov                 ecx, dword ptr [ebp - 0x38]
            //   894dec               | mov                 dword ptr [ebp - 0x14], ecx
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   8b55ec               | mov                 edx, dword ptr [ebp - 0x14]

        $sequence_6 = { 8b45bc 8b88c0000000 898d44ffffff 8b9544ffffff 83ea01 52 8b4dbc }
            // n = 7, score = 200
            //   8b45bc               | mov                 eax, dword ptr [ebp - 0x44]
            //   8b88c0000000         | mov                 ecx, dword ptr [eax + 0xc0]
            //   898d44ffffff         | mov                 dword ptr [ebp - 0xbc], ecx
            //   8b9544ffffff         | mov                 edx, dword ptr [ebp - 0xbc]
            //   83ea01               | sub                 edx, 1
            //   52                   | push                edx
            //   8b4dbc               | mov                 ecx, dword ptr [ebp - 0x44]

        $sequence_7 = { e8???????? 0fb6c8 85c9 750c c7854cffffff01000000 eb0a c7854cffffff00000000 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   0fb6c8               | movzx               ecx, al
            //   85c9                 | test                ecx, ecx
            //   750c                 | jne                 0xe
            //   c7854cffffff01000000     | mov    dword ptr [ebp - 0xb4], 1
            //   eb0a                 | jmp                 0xc
            //   c7854cffffff00000000     | mov    dword ptr [ebp - 0xb4], 0

        $sequence_8 = { ff15???????? 898568edffff 83bd68edffff00 750c c785bcedffff00000000 eb0c 8b85c4edffff }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   898568edffff         | mov                 dword ptr [ebp - 0x1298], eax
            //   83bd68edffff00       | cmp                 dword ptr [ebp - 0x1298], 0
            //   750c                 | jne                 0xe
            //   c785bcedffff00000000     | mov    dword ptr [ebp - 0x1244], 0
            //   eb0c                 | jmp                 0xe
            //   8b85c4edffff         | mov                 eax, dword ptr [ebp - 0x123c]

        $sequence_9 = { e8???????? 83c40c 85c0 0f84a4020000 ff742428 8b742440 33c0 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   0f84a4020000         | je                  0x2aa
            //   ff742428             | push                dword ptr [esp + 0x28]
            //   8b742440             | mov                 esi, dword ptr [esp + 0x40]
            //   33c0                 | xor                 eax, eax

    condition:
        7 of them and filesize < 3743744
}
Download all Yara Rules