KPOT Stealer (Malware Family)

SYMBOL	COMMON_NAME	aka. SYNONYMS

win.kpot_stealer (Back to overview)

KPOT Stealer

aka: Khalesi, Kpot

URLhaus

There is no description at this point.

References

2021-07-07 ⋅ Medium s2wlab ⋅ Seunghoe Kim
Deep analysis of KPOT Stealer
KPOT Stealer

2021-04-12 ⋅ PTSecurity ⋅ PTSecurity
PaaS, or how hackers evade antivirus software
Amadey Bunitu Cerber Dridex ISFB KPOT Stealer Mailto Nemty Phobos Pony Predator The Thief QakBot Raccoon RTM SmokeLoader Zloader

2020-12-15 ⋅ Github (Dump-GUY) ⋅ Jiří Vinopal
Reverse engineering KPOT v2.0 Stealer
KPOT Stealer

2020-11-04 ⋅ ZDNet ⋅ Catalin Cimpanu
REvil ransomware gang 'acquires' KPOT malware
KPOT Stealer REvil

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

2020-04-26 ⋅ Nullteilerfrei Blog ⋅ Lars Wallenborn
use Ghidra to Decrypt Strings of KPOTstealer Malware
KPOT Stealer

2020-04-12 ⋅ InfoSec Handlers Diary Blog ⋅ Vinnie
Dynamic analysis technique to get decrypted KPOT Malware
KPOT Stealer

2020-04-01 ⋅ Cisco ⋅ Shyam Sundar Ramaswami, Andrea Kaiser
Navigating Cybersecurity During a Pandemic: Latest Malware and Threat Actors
Azorult CloudEyE Formbook KPOT Stealer Metamorfo Nanocore RAT NetWire RC TrickBot

2020-03-23 ⋅ SANS ISC ⋅ Didier Stevens
KPOT Deployed via AutoIt Script
KPOT Stealer

2019-05-09 ⋅ Proofpoint ⋅ Dennis Schwarz, Proofpoint Threat Insight Team
New KPOT v2.0 stealer brings zero persistence and in-memory features to silently steal credentials
KPOT Stealer

2019-04-11 ⋅ Dr.Web ⋅ Dr. Web
The official website of a popular video editing software was infected with a banking trojan
KPOT Stealer

2018-10-25 ⋅ enSilo ⋅ Chen Erlich, Yakov Goldberg
Game of Trojans: Dissecting the #Khalesi Infostealer Malware
KPOT Stealer

2018-09-12 ⋅ Flashpoint ⋅ Paul Burbage, Mike Mimoso
Malware Campaign Targeting Jaxx Cryptocurrency Wallet Users Shut Down
KPOT Stealer

Yara Rules

[TLP:WHITE] win_kpot_stealer_auto (20211008 | Detects win.kpot_stealer.)

rule win_kpot_stealer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-10-07"
        version = "1"
        description = "Detects win.kpot_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.kpot_stealer"
        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 = { 83f92f 7414 83f95c 740a 83f962 7560 c60008 }
            // n = 7, score = 500
            //   83f92f               | cmp                 ecx, 0x2f
            //   7414                 | je                  0x16
            //   83f95c               | cmp                 ecx, 0x5c
            //   740a                 | je                  0xc
            //   83f962               | cmp                 ecx, 0x62
            //   7560                 | jne                 0x62
            //   c60008               | mov                 byte ptr [eax], 8

        $sequence_1 = { 83c710 314df8 ff4d0c 0f85f7feffff e9???????? 83c770 c7450c08000000 }
            // n = 7, score = 500
            //   83c710               | add                 edi, 0x10
            //   314df8               | xor                 dword ptr [ebp - 8], ecx
            //   ff4d0c               | dec                 dword ptr [ebp + 0xc]
            //   0f85f7feffff         | jne                 0xfffffefd
            //   e9????????           |                     
            //   83c770               | add                 edi, 0x70
            //   c7450c08000000       | mov                 dword ptr [ebp + 0xc], 8

        $sequence_2 = { 23c6 33d0 03c0 33c8 8bc2 c1e808 33c1 }
            // n = 7, score = 500
            //   23c6                 | and                 eax, esi
            //   33d0                 | xor                 edx, eax
            //   03c0                 | add                 eax, eax
            //   33c8                 | xor                 ecx, eax
            //   8bc2                 | mov                 eax, edx
            //   c1e808               | shr                 eax, 8
            //   33c1                 | xor                 eax, ecx

        $sequence_3 = { 8d4408d0 42 8a1a 8945fc 8ac3 e8???????? }
            // n = 6, score = 500
            //   8d4408d0             | lea                 eax, dword ptr [eax + ecx - 0x30]
            //   42                   | inc                 edx
            //   8a1a                 | mov                 bl, byte ptr [edx]
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8ac3                 | mov                 al, bl
            //   e8????????           |                     

        $sequence_4 = { 53 56 33db c645ff00 395d08 7e23 }
            // n = 6, score = 500
            //   53                   | push                ebx
            //   56                   | push                esi
            //   33db                 | xor                 ebx, ebx
            //   c645ff00             | mov                 byte ptr [ebp - 1], 0
            //   395d08               | cmp                 dword ptr [ebp + 8], ebx
            //   7e23                 | jle                 0x25

        $sequence_5 = { 8906 85c0 740e 8b5604 }
            // n = 4, score = 500
            //   8906                 | mov                 dword ptr [esi], eax
            //   85c0                 | test                eax, eax
            //   740e                 | je                  0x10
            //   8b5604               | mov                 edx, dword ptr [esi + 4]

        $sequence_6 = { 50 ff7510 8b4508 8bcf e8???????? 8bc7 }
            // n = 6, score = 500
            //   50                   | push                eax
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8bcf                 | mov                 ecx, edi
            //   e8????????           |                     
            //   8bc7                 | mov                 eax, edi

        $sequence_7 = { 753b 8b45f4 8b08 8d55f8 52 }
            // n = 5, score = 500
            //   753b                 | jne                 0x3d
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   8d55f8               | lea                 edx, dword ptr [ebp - 8]
            //   52                   | push                edx

        $sequence_8 = { 250f0f0f0f 33d0 c1e004 33c8 8bc2 }
            // n = 5, score = 500
            //   250f0f0f0f           | and                 eax, 0xf0f0f0f
            //   33d0                 | xor                 edx, eax
            //   c1e004               | shl                 eax, 4
            //   33c8                 | xor                 ecx, eax
            //   8bc2                 | mov                 eax, edx

        $sequence_9 = { c1e108 ff7514 0bc1 0fb64f02 ff7510 c1e110 }
            // n = 6, score = 500
            //   c1e108               | shl                 ecx, 8
            //   ff7514               | push                dword ptr [ebp + 0x14]
            //   0bc1                 | or                  eax, ecx
            //   0fb64f02             | movzx               ecx, byte ptr [edi + 2]
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   c1e110               | shl                 ecx, 0x10

    condition:
        7 of them and filesize < 219136
}

[TLP:WHITE] win_kpot_stealer_w0 (20190106 | Kpot)

rule win_kpot_stealer_w0 {
    meta:
        description = "Kpot"
        type = "Stealer"
        author = "Fumik0_"
        date = "30/08/2018"

        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.kpot_stealer"
        malpedia_version = "20190106"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
    strings:
        $mz = { 4d 5a }

        // Variant 1
        $v1_s1 = "GET %s HTTP/1.1" wide ascii
        $v1_s2 = "Host: %s" wide ascii
        $v1_s3 = "%02d-%02d-%02d %d:%02d:%02d" wide ascii
        $v1_s4 = "%S/base64.php?_f=%S" wide ascii      
        $v1_s5 = "IP: %S" wide ascii
        $v1_s6 = "MachineGuid: %s" wide ascii
        $v1_s7 = "CPU: %S (%d cores)" wide ascii
        $v1_s8 = "RAM: %S MB" wide ascii
        $v1_s9 = "Screen: %dx%d" wide ascii
        $v1_s10 = "PC: %s" wide ascii
        $v1_s11 = "User: %s" wide ascii
        $v1_s12 = "LT: %S (UTC+%d:%d)" wide ascii
        $v1_s13 = "GPU:" wide ascii
        $v1_s14 = "regbot.php" wide ascii
        $v1_s15 = "ip.php" wide ascii

        // Variant 2
        $v2_s1 = "GET %s HTTP/1.1" wide ascii
        $v2_s2 = "%s/%s.php" wide ascii
        $v2_s3 = "%s/gate.php" wide ascii
        $v2_s4 = "RAM: %s MB" wide ascii
        $v2_s5 = "IP: %s" wide ascii
        $v2_s6 = "CPU: %s (%d cores)" wide ascii
        $v2_s7 = "RAM: %s MB" wide ascii
        $v2_s8 = "Screen: %dx%d" wide ascii
        $v2_s9 = "LT: %s (UTC+%d:%d)" wide ascii
        $v2_s10 = "GPU:" wide ascii
        $v2_s11 = "screen.png" wide ascii

    condition:
        ($mz at 0) and ( (all of ($v1_*)) or (all of ($v2_*)) )
}

Download all Yara Rules

KPOT Stealer Propose Change

References

Yara Rules

KPOT Stealer