SYMBOLCOMMON_NAMEaka. SYNONYMS
win.arkei_stealer (Back to overview)

Arkei Stealer

aka: ArkeiStealer
URLhaus    

Arkei is a stealer that appeared around May 2018. It collects data about browsers (saved passwords and autofill forms), cryptocurrency wallets, and steal files matching an attacker-defined pattern. It then exfiltrates everything in a zip file uploaded to the attacker's panel. Later, it was forked and used as a base to create Vidar stealer.

References
2022-10-13SpamhausSpamhaus Malware Labs
@techreport{labs:20221013:spamhaus:43e3190, author = {Spamhaus Malware Labs}, title = {{Spamhaus Botnet Threat Update Q3 2022}}, date = {2022-10-13}, institution = {Spamhaus}, url = {https://info.spamhaus.com/hubfs/Botnet%20Reports/2022%20Q3%20Botnet%20Threat%20Update.pdf}, language = {English}, urldate = {2022-10-17} } Spamhaus Botnet Threat Update Q3 2022
FluBot Loki Arkei Stealer AsyncRAT Ave Maria BumbleBee Cobalt Strike DCRat Dridex Emotet Nanocore RAT NetWire RC NjRAT QakBot RecordBreaker RedLine Stealer Remcos Socelars Tofsee Vjw0rm
2022-07-13KELAKELA Cyber Intelligence Center
@online{center:20220713:next:b2e43e4, author = {KELA Cyber Intelligence Center}, title = {{The Next Generation of Info Stealers}}, date = {2022-07-13}, organization = {KELA}, url = {https://ke-la.com/information-stealers-a-new-landscape/}, language = {English}, urldate = {2022-07-18} } The Next Generation of Info Stealers
Arkei Stealer Azorult BlackGuard Eternity Stealer Ginzo Stealer Mars Stealer MetaStealer Raccoon RedLine Stealer Vidar
2022-03-23InfoSec Handlers Diary BlogBrad Duncan
@online{duncan:20220323:arkei:b2a08f5, author = {Brad Duncan}, title = {{Arkei Variants: From Vidar to Mars Stealer}}, date = {2022-03-23}, organization = {InfoSec Handlers Diary Blog}, url = {https://isc.sans.edu/diary/rss/28468}, language = {English}, urldate = {2022-03-25} } Arkei Variants: From Vidar to Mars Stealer
Arkei Stealer Mars Stealer Vidar
2022-02-17BlackberryBlackBerry Research & Intelligence Team
@online{team:20220217:threat:899b90a, author = {BlackBerry Research & Intelligence Team}, title = {{Threat Thursday: Arkei Infostealer Expands Reach Using SmokeLoader to Target Crypto Wallets and MFA}}, date = {2022-02-17}, organization = {Blackberry}, url = {https://blogs.blackberry.com/en/2022/02/threat-thursday-arkei-infostealer}, language = {English}, urldate = {2022-02-26} } Threat Thursday: Arkei Infostealer Expands Reach Using SmokeLoader to Target Crypto Wallets and MFA
Arkei Stealer SmokeLoader
2022-02-12forensicitguyTony Lambert
@online{lambert:20220212:analyzing:cea05eb, author = {Tony Lambert}, title = {{Analyzing a Stealer MSI using msitools}}, date = {2022-02-12}, organization = {forensicitguy}, url = {https://forensicitguy.github.io/analyzing-stealer-msi-using-msitools/}, language = {English}, urldate = {2022-02-14} } Analyzing a Stealer MSI using msitools
Arkei Stealer
2021-11-23Minerva LabsNatalie Zargarov
@online{zargarov:20211123:long:6d3da55, author = {Natalie Zargarov}, title = {{A Long List Of Arkei Stealer's Crypto Browser Wallets}}, date = {2021-11-23}, organization = {Minerva Labs}, url = {https://blog.minerva-labs.com/a-long-list-of-arkei-stealers-browser-crypto-wallets}, language = {English}, urldate = {2022-01-12} } A Long List Of Arkei Stealer's Crypto Browser Wallets
Arkei Stealer
2020-07-30SpamhausSpamhaus Malware Labs
@techreport{labs:20200730:spamhaus:038546d, author = {Spamhaus Malware Labs}, title = {{Spamhaus Botnet Threat Update Q2 2020}}, date = {2020-07-30}, institution = {Spamhaus}, url = {https://www.spamhaus.org/news/images/botnet-report-2020-q2/2020-q2-spamhaus-botnet-threat-report.pdf}, language = {English}, urldate = {2020-07-30} } Spamhaus Botnet Threat Update Q2 2020
AdWind Agent Tesla Arkei Stealer AsyncRAT Ave Maria Azorult DanaBot Emotet IcedID ISFB KPOT Stealer Loki Password Stealer (PWS) Nanocore RAT NetWire RC NjRAT Pony Raccoon RedLine Stealer Remcos Zloader
2018-12-24fumik0 blogfumik0
@online{fumik0:20181224:lets:f7dfc2c, author = {fumik0}, title = {{Let’s dig into Vidar – An Arkei Copycat/Forked Stealer (In-depth analysis)}}, date = {2018-12-24}, organization = {fumik0 blog}, url = {https://fumik0.com/2018/12/24/lets-dig-into-vidar-an-arkei-copycat-forked-stealer-in-depth-analysis/}, language = {English}, urldate = {2022-01-12} } Let’s dig into Vidar – An Arkei Copycat/Forked Stealer (In-depth analysis)
Arkei Stealer Vidar
2018-06-15Bleeping ComputerCatalin Cimpanu
@online{cimpanu:20180615:hacker:e0452dd, author = {Catalin Cimpanu}, title = {{Hacker Breaches Syscoin GitHub Account and Poisons Official Client}}, date = {2018-06-15}, organization = {Bleeping Computer}, url = {https://www.bleepingcomputer.com/news/security/hacker-breaches-syscoin-github-account-and-poisons-official-client/}, language = {English}, urldate = {2019-12-20} } Hacker Breaches Syscoin GitHub Account and Poisons Official Client
Arkei Stealer
Yara Rules
[TLP:WHITE] win_arkei_stealer_auto (20221125 | Detects win.arkei_stealer.)
rule win_arkei_stealer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.arkei_stealer."
        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.arkei_stealer"
        malpedia_rule_date = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { 74aa 8b4dd6 0faf4dd4 0fb7c1 83f801 7507 8bd8 }
            // n = 7, score = 400
            //   74aa                 | je                  0xffffffac
            //   8b4dd6               | mov                 ecx, dword ptr [ebp - 0x2a]
            //   0faf4dd4             | imul                ecx, dword ptr [ebp - 0x2c]
            //   0fb7c1               | movzx               eax, cx
            //   83f801               | cmp                 eax, 1
            //   7507                 | jne                 9
            //   8bd8                 | mov                 ebx, eax

        $sequence_1 = { 6a08 57 8945e8 ffd3 }
            // n = 4, score = 400
            //   6a08                 | push                8
            //   57                   | push                edi
            //   8945e8               | mov                 dword ptr [ebp - 0x18], eax
            //   ffd3                 | call                ebx

        $sequence_2 = { 50 51 ff15???????? 85c0 0f84c4feffff 57 }
            // n = 6, score = 400
            //   50                   | push                eax
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f84c4feffff         | je                  0xfffffeca
            //   57                   | push                edi

        $sequence_3 = { 85c0 0f8437feffff 8b7614 6a00 8d45e4 }
            // n = 5, score = 400
            //   85c0                 | test                eax, eax
            //   0f8437feffff         | je                  0xfffffe3d
            //   8b7614               | mov                 esi, dword ptr [esi + 0x14]
            //   6a00                 | push                0
            //   8d45e4               | lea                 eax, [ebp - 0x1c]

        $sequence_4 = { 895608 668b45d4 6689460c 668b4dd6 66894e0e }
            // n = 5, score = 400
            //   895608               | mov                 dword ptr [esi + 8], edx
            //   668b45d4             | mov                 ax, word ptr [ebp - 0x2c]
            //   6689460c             | mov                 word ptr [esi + 0xc], ax
            //   668b4dd6             | mov                 cx, word ptr [ebp - 0x2a]
            //   66894e0e             | mov                 word ptr [esi + 0xe], cx

        $sequence_5 = { 8b16 8d448a0e 6a00 8d4de4 51 6a0e }
            // n = 6, score = 400
            //   8b16                 | mov                 edx, dword ptr [esi]
            //   8d448a0e             | lea                 eax, [edx + ecx*4 + 0xe]
            //   6a00                 | push                0
            //   8d4de4               | lea                 ecx, [ebp - 0x1c]
            //   51                   | push                ecx
            //   6a0e                 | push                0xe

        $sequence_6 = { 56 894590 ff15???????? 8bf8 897d94 83ffff }
            // n = 6, score = 400
            //   56                   | push                esi
            //   894590               | mov                 dword ptr [ebp - 0x70], eax
            //   ff15????????         |                     
            //   8bf8                 | mov                 edi, eax
            //   897d94               | mov                 dword ptr [ebp - 0x6c], edi
            //   83ffff               | cmp                 edi, -1

        $sequence_7 = { 6a0a 57 8bf0 ffd3 8bd8 53 56 }
            // n = 7, score = 400
            //   6a0a                 | push                0xa
            //   57                   | push                edi
            //   8bf0                 | mov                 esi, eax
            //   ffd3                 | call                ebx
            //   8bd8                 | mov                 ebx, eax
            //   53                   | push                ebx
            //   56                   | push                esi

        $sequence_8 = { 8b55e8 52 6a00 ffd6 }
            // n = 4, score = 400
            //   8b55e8               | mov                 edx, dword ptr [ebp - 0x18]
            //   52                   | push                edx
            //   6a00                 | push                0
            //   ffd6                 | call                esi

        $sequence_9 = { ff15???????? 85c0 0f840efeffff 53 }
            // n = 4, score = 400
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f840efeffff         | je                  0xfffffe14
            //   53                   | push                ebx

    condition:
        7 of them and filesize < 1744896
}
[TLP:WHITE] win_arkei_stealer_w0   (20181023 | Arkei Stealer)
rule win_arkei_stealer_w0 {
    meta:
        author = "Fumik0_"
        description = "Arkei Stealer"
        Date = "2018/07/10"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.arkei_stealer"
        malpedia_version = "20181023"
        malpedia_sharing = "TLP:WHITE"
        malpedia_license = ""
 
    strings:
        $s1 = "Arkei" wide ascii
        $s2 = "/server/gate" wide ascii
        $s3 = "/server/grubConfig" wide ascii
        $s4 = "\\files\\" wide ascii
        $s5 = "SQLite" wide ascii
 
    condition:
        all of ($s*)   
}
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