SYMBOLCOMMON_NAMEaka. SYNONYMS
win.arkei_stealer (Back to overview)

Arkei Stealer

aka: ArkeiStealer
VTCollection     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
2023-07-24 ⋅ M4lcode ⋅ Mostafa Farghaly
Deep Analysis of Vidar Stealer
Arkei Stealer Vidar
2022-12-18 ⋅ ZAYOTEM ⋅ Celal Doğan DURAN, Emre TÜRKYILMAZ
Arkei Stealer Technical Analysis Report
Arkei Stealer
2022-11-07 ⋅ ThreatMon ⋅ ThreatMon Malware Research Team
Arkei Staler Analysis
Arkei Stealer
2022-10-13 ⋅ Spamhaus ⋅ Spamhaus Malware Labs
Spamhaus Botnet Threat Update Q3 2022
FluBot Arkei Stealer AsyncRAT Ave Maria BumbleBee Cobalt Strike DCRat Dridex Emotet Loki Password Stealer (PWS) Nanocore RAT NetWire RC NjRAT QakBot RecordBreaker RedLine Stealer Remcos Socelars Tofsee Vjw0rm
2022-07-13 ⋅ KELA ⋅ KELA Cyber Intelligence Center
The Next Generation of Info Stealers
Arkei Stealer Azorult BlackGuard Eternity Stealer Ginzo Stealer Mars Stealer MetaStealer Raccoon RedLine Stealer Vidar
2022-03-23 ⋅ InfoSec Handlers Diary Blog ⋅ Brad Duncan
Arkei Variants: From Vidar to Mars Stealer
Arkei Stealer Mars Stealer Vidar
2022-03-23 ⋅ InfoSec Handlers Diary Blog ⋅ Brad Duncan
Arkei Variants: From Vidar to Mars Stealer
Arkei Stealer Mars Stealer Oski Stealer Vidar
2022-02-17 ⋅ Blackberry ⋅ BlackBerry Research & Intelligence Team
Threat Thursday: Arkei Infostealer Expands Reach Using SmokeLoader to Target Crypto Wallets and MFA
Arkei Stealer SmokeLoader
2022-02-12 ⋅ forensicitguy ⋅ Tony Lambert
Analyzing a Stealer MSI using msitools
Arkei Stealer
2021-11-23 ⋅ Minerva Labs ⋅ Natalie Zargarov
A Long List Of Arkei Stealer's Crypto Browser Wallets
Arkei Stealer
2020-07-30 ⋅ Spamhaus ⋅ Spamhaus Malware Labs
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
2018-12-24 ⋅ fumik0 blog ⋅ fumik0
Let’s dig into Vidar – An Arkei Copycat/Forked Stealer (In-depth analysis)
Arkei Stealer Vidar
2018-06-15 ⋅ Bleeping Computer ⋅ Catalin Cimpanu
Hacker Breaches Syscoin GitHub Account and Poisons Official Client
Arkei Stealer
Yara Rules
[TLP:WHITE] win_arkei_stealer_auto (20230808 | Detects win.arkei_stealer.)
rule win_arkei_stealer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-12-06"
        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 = "20231130"
        malpedia_hash = "fc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351"
        malpedia_version = "20230808"
        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 = { 8d55c4 52 6a18 50 ff15???????? 85c0 }
            // n = 6, score = 400
            //   8d55c4               | lea                 edx, [ebp - 0x3c]
            //   52                   | push                edx
            //   6a18                 | push                0x18
            //   50                   | push                eax
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax

        $sequence_1 = { 8be5 5d c3 50 8b45e8 }
            // n = 5, score = 400
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   50                   | push                eax
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]

        $sequence_2 = { 894614 897e24 ff15???????? 8bd8 3bdf 0f84e3feffff }
            // n = 6, score = 400
            //   894614               | mov                 dword ptr [esi + 0x14], eax
            //   897e24               | mov                 dword ptr [esi + 0x24], edi
            //   ff15????????         |                     
            //   8bd8                 | mov                 ebx, eax
            //   3bdf                 | cmp                 ebx, edi
            //   0f84e3feffff         | je                  0xfffffee9

        $sequence_3 = { 8bf0 ffd3 8bd8 53 56 }
            // n = 5, score = 400
            //   8bf0                 | mov                 esi, eax
            //   ffd3                 | call                ebx
            //   8bd8                 | mov                 ebx, eax
            //   53                   | push                ebx
            //   56                   | push                esi

        $sequence_4 = { 56 53 52 57 50 51 ff15???????? }
            // n = 7, score = 400
            //   56                   | push                esi
            //   53                   | push                ebx
            //   52                   | push                edx
            //   57                   | push                edi
            //   50                   | push                eax
            //   51                   | push                ecx
            //   ff15????????         |                     

        $sequence_5 = { 8b00 50 ff15???????? 83f8ff 740b a810 7507 }
            // n = 7, score = 400
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   83f8ff               | cmp                 eax, -1
            //   740b                 | je                  0xd
            //   a810                 | test                al, 0x10
            //   7507                 | jne                 9

        $sequence_6 = { 85c0 0f8458feffff 8b4e20 6a00 8d45e4 50 8d148d28000000 }
            // n = 7, score = 400
            //   85c0                 | test                eax, eax
            //   0f8458feffff         | je                  0xfffffe5e
            //   8b4e20               | mov                 ecx, dword ptr [esi + 0x20]
            //   6a00                 | push                0
            //   8d45e4               | lea                 eax, [ebp - 0x1c]
            //   50                   | push                eax
            //   8d148d28000000       | lea                 edx, [ecx*4 + 0x28]

        $sequence_7 = { 8bf0 c70628000000 8b4dc8 894e04 8b55cc 895608 668b45d4 }
            // n = 7, score = 400
            //   8bf0                 | mov                 esi, eax
            //   c70628000000         | mov                 dword ptr [esi], 0x28
            //   8b4dc8               | mov                 ecx, dword ptr [ebp - 0x38]
            //   894e04               | mov                 dword ptr [esi + 4], ecx
            //   8b55cc               | mov                 edx, dword ptr [ebp - 0x34]
            //   895608               | mov                 dword ptr [esi + 8], edx
            //   668b45d4             | mov                 ax, word ptr [ebp - 0x2c]

        $sequence_8 = { 8b7614 6a00 8d45e4 50 56 }
            // n = 5, score = 400
            //   8b7614               | mov                 esi, dword ptr [esi + 0x14]
            //   6a00                 | push                0
            //   8d45e4               | lea                 eax, [ebp - 0x1c]
            //   50                   | push                eax
            //   56                   | push                esi

        $sequence_9 = { 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

    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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