SYMBOLCOMMON_NAMEaka. SYNONYMS
win.pushdo (Back to overview)

Pushdo

URLhaus    

Pushdo is usually classified as a "downloader" trojan - meaning its true purpose is to download and install additional malicious software. There are dozens of downloader trojan families out there, but Pushdo is actually more sophisticated than most, but that sophistication lies in the Pushdo control server rather than the trojan.

References
2021-02-23CrowdStrikeCrowdStrike
@techreport{crowdstrike:20210223:2021:bf5bc4f, author = {CrowdStrike}, title = {{2021 Global Threat Report}}, date = {2021-02-23}, institution = {CrowdStrike}, url = {https://go.crowdstrike.com/rs/281-OBQ-266/images/Report2021GTR.pdf}, language = {English}, urldate = {2021-02-25} } 2021 Global Threat Report
RansomEXX Amadey Anchor Avaddon BazarBackdoor Clop Cobalt Strike Conti Cutwail DanaBot DarkSide DoppelPaymer Dridex Egregor Emotet Hakbit IcedID JSOutProx KerrDown LockBit Mailto Maze MedusaLocker Mespinoza Mount Locker NedDnLoader Nemty Pay2Key PlugX Pushdo PwndLocker PyXie QakBot Quasar RAT RagnarLocker Ragnarok RansomEXX REvil Ryuk Sekhmet ShadowPad SmokeLoader Snake SUNBURST SunCrypt TEARDROP TrickBot WastedLocker Winnti Zloader KNOCKOUT SPIDER OUTLAW SPIDER RIDDLE SPIDER SOLAR SPIDER VIKING SPIDER
2020-03-15The Shadowserver FoundationShadowserver Foundation
@online{foundation:20200315:has:80a92d5, author = {Shadowserver Foundation}, title = {{Has The Sun Set On The Necurs Botnet?}}, date = {2020-03-15}, organization = {The Shadowserver Foundation}, url = {https://www.shadowserver.org/news/has-the-sun-set-on-the-necurs-botnet/}, language = {English}, urldate = {2020-03-17} } Has The Sun Set On The Necurs Botnet?
Andromeda Cutwail Kelihos Necurs Pushdo
2020SecureworksSecureWorks
@online{secureworks:2020:gold:65f4550, author = {SecureWorks}, title = {{GOLD ESSEX}}, date = {2020}, organization = {Secureworks}, url = {http://www.secureworks.com/research/threat-profiles/gold-essex}, language = {English}, urldate = {2020-05-27} } GOLD ESSEX
Cutwail Pony Pushdo NARWHAL SPIDER
2017-04-03Malware Traffic AnalysisBrad Duncan
@online{duncan:20170403:dhl:b9c41a9, author = {Brad Duncan}, title = {{DHL Invoice Malspam/Photo Malspam}}, date = {2017-04-03}, organization = {Malware Traffic Analysis}, url = {http://malware-traffic-analysis.net/2017/04/03/index2.html}, language = {English}, urldate = {2020-01-13} } DHL Invoice Malspam/Photo Malspam
Pushdo
2016-02-01BluelivRaashid Bhat
@online{bhat:20160201:tracking:f5fa1f1, author = {Raashid Bhat}, title = {{Tracking the footprints of PushDo Trojan}}, date = {2016-02-01}, organization = {Blueliv}, url = {https://www.blueliv.com/research/tracking-the-footproints-of-pushdo-trojan/}, language = {English}, urldate = {2019-11-20} } Tracking the footprints of PushDo Trojan
Pushdo
2009-05-22Trend MicroAlice Decker, David Sancho, Loucif Kharouni, Max Goncharov, Robert McArdle
@techreport{decker:20090522:pushdo:518e04c, author = {Alice Decker and David Sancho and Loucif Kharouni and Max Goncharov and Robert McArdle}, title = {{Pushdo / Cutwail Botnet}}, date = {2009-05-22}, institution = {Trend Micro}, url = {https://www.trendmicro.de/cloud-content/us/pdfs/business/white-papers/wp_study-of-pushdo-cutwail-botnet.pdf}, language = {English}, urldate = {2020-01-13} } Pushdo / Cutwail Botnet
Pushdo
2007-12-16SecureworksJoe Stewart
@online{stewart:20071216:pushdo:6a66753, author = {Joe Stewart}, title = {{Pushdo - Analysis of a Modern Malware Distribution System}}, date = {2007-12-16}, organization = {Secureworks}, url = {https://www.secureworks.com/research/pushdo}, language = {English}, urldate = {2019-07-09} } Pushdo - Analysis of a Modern Malware Distribution System
Pushdo
Yara Rules
[TLP:WHITE] win_pushdo_auto (20211008 | Detects win.pushdo.)
rule win_pushdo_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-10-07"
        version = "1"
        description = "Detects win.pushdo."
        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.pushdo"
        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 ff15???????? 33d2 b9ffff0000 }
            // n = 4, score = 1200
            //   50                   | push                eax
            //   ff15????????         |                     
            //   33d2                 | xor                 edx, edx
            //   b9ffff0000           | mov                 ecx, 0xffff

        $sequence_1 = { f7f9 33c9 ba88020000 f7e2 0f90c1 f7d9 0bc8 }
            // n = 7, score = 1200
            //   f7f9                 | idiv                ecx
            //   33c9                 | xor                 ecx, ecx
            //   ba88020000           | mov                 edx, 0x288
            //   f7e2                 | mul                 edx
            //   0f90c1               | seto                cl
            //   f7d9                 | neg                 ecx
            //   0bc8                 | or                  ecx, eax

        $sequence_2 = { 60 8b45fc b10b d3c0 61 }
            // n = 5, score = 1100
            //   60                   | pushal              
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   b10b                 | mov                 cl, 0xb
            //   d3c0                 | rol                 eax, cl
            //   61                   | popal               

        $sequence_3 = { 8b4df4 0fbe940df0feffff 0395e8feffff 81e2ff000000 }
            // n = 4, score = 800
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   0fbe940df0feffff     | movsx               edx, byte ptr [ebp + ecx - 0x110]
            //   0395e8feffff         | add                 edx, dword ptr [ebp - 0x118]
            //   81e2ff000000         | and                 edx, 0xff

        $sequence_4 = { c745f400000000 c745fc00000000 eb09 8b55fc 83c201 8955fc 817dfc00010000 }
            // n = 7, score = 800
            //   c745f400000000       | mov                 dword ptr [ebp - 0xc], 0
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   eb09                 | jmp                 0xb
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   83c201               | add                 edx, 1
            //   8955fc               | mov                 dword ptr [ebp - 4], edx
            //   817dfc00010000       | cmp                 dword ptr [ebp - 4], 0x100

        $sequence_5 = { 0fbe1410 03ca 81e1ff000000 898de8feffff 8b85e8feffff 8a8c05f0feffff }
            // n = 6, score = 800
            //   0fbe1410             | movsx               edx, byte ptr [eax + edx]
            //   03ca                 | add                 ecx, edx
            //   81e1ff000000         | and                 ecx, 0xff
            //   898de8feffff         | mov                 dword ptr [ebp - 0x118], ecx
            //   8b85e8feffff         | mov                 eax, dword ptr [ebp - 0x118]
            //   8a8c05f0feffff       | mov                 cl, byte ptr [ebp + eax - 0x110]

        $sequence_6 = { 894dfc 8b55fc 3b5510 0f83a6000000 }
            // n = 4, score = 800
            //   894dfc               | mov                 dword ptr [ebp - 4], ecx
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   3b5510               | cmp                 edx, dword ptr [ebp + 0x10]
            //   0f83a6000000         | jae                 0xac

        $sequence_7 = { 888415f0feffff 8b4d08 034dfc 0fbe11 8b85e8feffff 0fbe8c05f0feffff }
            // n = 6, score = 800
            //   888415f0feffff       | mov                 byte ptr [ebp + edx - 0x110], al
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   034dfc               | add                 ecx, dword ptr [ebp - 4]
            //   0fbe11               | movsx               edx, byte ptr [ecx]
            //   8b85e8feffff         | mov                 eax, dword ptr [ebp - 0x118]
            //   0fbe8c05f0feffff     | movsx               ecx, byte ptr [ebp + eax - 0x110]

        $sequence_8 = { 8d45d8 6a10 50 e8???????? 59 59 6a10 }
            // n = 7, score = 500
            //   8d45d8               | lea                 eax, dword ptr [ebp - 0x28]
            //   6a10                 | push                0x10
            //   50                   | push                eax
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   6a10                 | push                0x10

        $sequence_9 = { 52 8d8588fbffff 50 e8???????? }
            // n = 4, score = 500
            //   52                   | push                edx
            //   8d8588fbffff         | lea                 eax, dword ptr [ebp - 0x478]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_10 = { 7e1a 8b842458020000 8b8c245c020000 0336 03c1 }
            // n = 5, score = 500
            //   7e1a                 | jle                 0x1c
            //   8b842458020000       | mov                 eax, dword ptr [esp + 0x258]
            //   8b8c245c020000       | mov                 ecx, dword ptr [esp + 0x25c]
            //   0336                 | add                 esi, dword ptr [esi]
            //   03c1                 | add                 eax, ecx

        $sequence_11 = { 85c0 7419 ff7508 57 ff7510 }
            // n = 5, score = 500
            //   85c0                 | test                eax, eax
            //   7419                 | je                  0x1b
            //   ff7508               | push                dword ptr [ebp + 8]
            //   57                   | push                edi
            //   ff7510               | push                dword ptr [ebp + 0x10]

        $sequence_12 = { eb13 53 8d4c2424 51 57 }
            // n = 5, score = 500
            //   eb13                 | jmp                 0x15
            //   53                   | push                ebx
            //   8d4c2424             | lea                 ecx, dword ptr [esp + 0x24]
            //   51                   | push                ecx
            //   57                   | push                edi

        $sequence_13 = { 8b45f8 69c00d661900 055ff36e3c 33d2 f77508 8bc2 c9 }
            // n = 7, score = 500
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   69c00d661900         | imul                eax, eax, 0x19660d
            //   055ff36e3c           | add                 eax, 0x3c6ef35f
            //   33d2                 | xor                 edx, edx
            //   f77508               | div                 dword ptr [ebp + 8]
            //   8bc2                 | mov                 eax, edx
            //   c9                   | leave               

        $sequence_14 = { 8945fc 8b45fc 8d8c059ffcffff 898d98fcffff eb09 8b5510 83ea01 }
            // n = 7, score = 200
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8d8c059ffcffff       | lea                 ecx, dword ptr [ebp + eax - 0x361]
            //   898d98fcffff         | mov                 dword ptr [ebp - 0x368], ecx
            //   eb09                 | jmp                 0xb
            //   8b5510               | mov                 edx, dword ptr [ebp + 0x10]
            //   83ea01               | sub                 edx, 1

        $sequence_15 = { 8bec 81ec70040000 8d8590fbffff 8985e4fdffff c78598fdffff44000000 }
            // n = 5, score = 200
            //   8bec                 | mov                 ebp, esp
            //   81ec70040000         | sub                 esp, 0x470
            //   8d8590fbffff         | lea                 eax, dword ptr [ebp - 0x470]
            //   8985e4fdffff         | mov                 dword ptr [ebp - 0x21c], eax
            //   c78598fdffff44000000     | mov    dword ptr [ebp - 0x268], 0x44

        $sequence_16 = { 817df48d000000 7e07 33c0 e9???????? c745ec00000000 837de400 }
            // n = 6, score = 200
            //   817df48d000000       | cmp                 dword ptr [ebp - 0xc], 0x8d
            //   7e07                 | jle                 9
            //   33c0                 | xor                 eax, eax
            //   e9????????           |                     
            //   c745ec00000000       | mov                 dword ptr [ebp - 0x14], 0
            //   837de400             | cmp                 dword ptr [ebp - 0x1c], 0

        $sequence_17 = { c745f401000000 c745ec00000000 eb09 8b55f4 83c201 8955f4 }
            // n = 6, score = 200
            //   c745f401000000       | mov                 dword ptr [ebp - 0xc], 1
            //   c745ec00000000       | mov                 dword ptr [ebp - 0x14], 0
            //   eb09                 | jmp                 0xb
            //   8b55f4               | mov                 edx, dword ptr [ebp - 0xc]
            //   83c201               | add                 edx, 1
            //   8955f4               | mov                 dword ptr [ebp - 0xc], edx

        $sequence_18 = { 899585fdffff 899589fdffff 89958dfdffff 899591fdffff }
            // n = 4, score = 200
            //   899585fdffff         | mov                 dword ptr [ebp - 0x27b], edx
            //   899589fdffff         | mov                 dword ptr [ebp - 0x277], edx
            //   89958dfdffff         | mov                 dword ptr [ebp - 0x273], edx
            //   899591fdffff         | mov                 dword ptr [ebp - 0x26f], edx

        $sequence_19 = { 52 ff15???????? 8b85e4fdffff 50 8d8df8fdffff }
            // n = 5, score = 200
            //   52                   | push                edx
            //   ff15????????         |                     
            //   8b85e4fdffff         | mov                 eax, dword ptr [ebp - 0x21c]
            //   50                   | push                eax
            //   8d8df8fdffff         | lea                 ecx, dword ptr [ebp - 0x208]

        $sequence_20 = { 8902 8b4dd8 83c104 894dd8 8b55dc 83c204 8955dc }
            // n = 7, score = 200
            //   8902                 | mov                 dword ptr [edx], eax
            //   8b4dd8               | mov                 ecx, dword ptr [ebp - 0x28]
            //   83c104               | add                 ecx, 4
            //   894dd8               | mov                 dword ptr [ebp - 0x28], ecx
            //   8b55dc               | mov                 edx, dword ptr [ebp - 0x24]
            //   83c204               | add                 edx, 4
            //   8955dc               | mov                 dword ptr [ebp - 0x24], edx

    condition:
        7 of them and filesize < 163840
}
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