Overview
overview
10Static
static
10kayflock-b...nt.dll
windows7-x64
1kayflock-b...nt.dll
windows10-2004-x64
1kayflock-b...on.exe
windows7-x64
1kayflock-b...on.exe
windows10-2004-x64
1kayflock-b...ck.exe
windows7-x64
1kayflock-b...ck.exe
windows10-2004-x64
7kayflock-b...us.dll
windows7-x64
1kayflock-b...us.dll
windows10-2004-x64
1kayflock-b...ne.exe
windows10-2004-x64
1kayflock-b...vc.exe
windows10-2004-x64
1kayflock-b...er.exe
windows10-2004-x64
1kayflock-b...ic.exe
windows7-x64
8kayflock-b...ic.exe
windows10-2004-x64
8kayflock-b...hh.exe
windows10-2004-x64
1kayflock-b...ad.exe
windows10-2004-x64
1kayflock-b...64.exe
windows10-2004-x64
1kayflock-b...32.dll
windows10-2004-x64
1kayflock-b...32.exe
windows10-2004-x64
1kayflock-b...te.exe
windows10-2004-x64
7Analysis
- max time kernel
149s - max time network
154s - platform
windows10-2004_x64 - resource
win10v2004-20240412-en - resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system - submitted
13/04/2024, 17:32
Behavioral task
behavioral1
Sample
kayflock-beta/System.Management.dll
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
kayflock-beta/System.Management.dll
Resource
win10v2004-20240412-en
Behavioral task
behavioral3
Sample
kayflock-beta/byfron.exe
Resource
win7-20240221-en
Behavioral task
behavioral4
Sample
kayflock-beta/byfron.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral5
Sample
kayflock-beta/kayflock.exe
Resource
win7-20240221-en
Behavioral task
behavioral6
Sample
kayflock-beta/kayflock.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral7
Sample
kayflock-beta/nexus.dll
Resource
win7-20231129-en
Behavioral task
behavioral8
Sample
kayflock-beta/nexus.dll
Resource
win10v2004-20240412-en
Behavioral task
behavioral9
Sample
kayflock-beta/packages/ranks/HelpPane.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral10
Sample
kayflock-beta/packages/ranks/bfsvc.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral11
Sample
kayflock-beta/packages/ranks/explorer.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral12
Sample
kayflock-beta/packages/ranks/fullstack-magic.exe
Resource
win7-20240221-en
Behavioral task
behavioral13
Sample
kayflock-beta/packages/ranks/fullstack-magic.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral14
Sample
kayflock-beta/packages/ranks/hh.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral15
Sample
kayflock-beta/packages/ranks/notepad.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral16
Sample
kayflock-beta/packages/ranks/splwow64.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral17
Sample
kayflock-beta/packages/ranks/twain_32.dll
Resource
win10v2004-20240412-en
Behavioral task
behavioral18
Sample
kayflock-beta/packages/ranks/winhlp32.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral19
Sample
kayflock-beta/packages/ranks/write.exe
Resource
win10v2004-20240412-en
General
- Target kayflock-beta/packages/ranks/fullstack-magic.exe
- Size 1.4MB
- Sample240413-v4rrmsab8v
- SHA256 7e01d1f8f33c2df815d95078825da15efdeaa5cbd6a8556d8323c0d39ad0cd53
- MD5 4a629a32c3cc21b2276bb0785713eb1e
- SHA1 7888df74655fcbd13b80cf614098f1a773596438
- SHA512 1f1765b9699aa1da93763d956b2cc110228a74f492fde210e27b4ec4b7b26c55fefc6dd5a4e73c8e324b2208be28f52b8261a64247cb42f8330c9cfea451570d
- SSDEEP 24576:Mc8sHmuATYC2ts1BsuZYrPNVfBAmNvf26ikntJMVoUx8AI8AKwsKI2+Xf:z3Hmu+B2ts1BsEYhVHpfCKMVoUiAI8Y
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
- Sets service image path in registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\frAQBc8Wsa1xVPfv\ImagePath = "\\??\\C:\\Users\\Admin\\AppData\\Local\\Temp\\frAQBc8Wsa1xVPfv" fullstack-magic.exe - Suspicious behavior: LoadsDriver 1 IoCs
pid Process 4396 fullstack-magic.exe - Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeLoadDriverPrivilege 4396 fullstack-magic.exe - Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 4396 wrote to memory of 2204 4396 fullstack-magic.exe 85 PID 4396 wrote to memory of 2204 4396 fullstack-magic.exe 85 PID 2204 wrote to memory of 1656 2204 cmd.exe 86 PID 2204 wrote to memory of 1656 2204 cmd.exe 86 PID 2204 wrote to memory of 1100 2204 cmd.exe 87 PID 2204 wrote to memory of 1100 2204 cmd.exe 87 PID 2204 wrote to memory of 4568 2204 cmd.exe 88 PID 2204 wrote to memory of 4568 2204 cmd.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\kayflock-beta\packages\ranks\fullstack-magic.exe"C:\Users\Admin\AppData\Local\Temp\kayflock-beta\packages\ranks\fullstack-magic.exe"1⤵
- Sets service image path in registry
- Suspicious behavior: LoadsDriver
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4396 -
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\kayflock-beta\packages\ranks\fullstack-magic.exe" MD5 | find /i /v "md5" | find /i /v "certutil"2⤵
- Suspicious use of WriteProcessMemory
PID:2204 -
C:\Windows\system32\certutil.execertutil -hashfile "C:\Users\Admin\AppData\Local\Temp\kayflock-beta\packages\ranks\fullstack-magic.exe" MD53⤵PID:1656
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C:\Windows\system32\find.exefind /i /v "md5"3⤵PID:1100
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C:\Windows\system32\find.exefind /i /v "certutil"3⤵PID:4568
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