asyncrat | f414e4465043ddc7e7d558b341d2fefaf62a379d8107c7bc7b39a3d3f4c55b56

Analysis

max time kernel
138s
max time network
126s
platform
windows10-1703_x64
resource
win10-20230220-en
resource tags

arch:x64arch:x86image:win10-20230220-enlocale:en-usos:windows10-1703-x64system
submitted
24-04-2023 15:39

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General

Target

Redline Stealer v24.2 cracked [XT_CH]/Kurome.Builder/Kurome.Builder v24.2.exe
Size

170KB
MD5

470a8267b5eba7eb998d9fa69532f849
SHA1

1152ddb2ab93aae9983e3e8b5c4f367875323e3e
SHA256

6cdb8d1af85d10ed3022ae0a183e3e9dff0ad1bc4a90915e7e41b600154a349e
SHA512

5f151230dc97e0804cbe7b36ce9a4570023bdaf0283ae2681732a835c26e540ec93f9c56cd78599c8deeeaed10b2b50f9c976c85ad95d4e36460e05083f7048d
SSDEEP

3072:O+STW8djpN6izj8mZwHQiWZqswqIPu/i9b+J2cOZTMi56+WpL:z8XN6W8mmdUwXPSi9b2c3

Score

10^/10

asyncrat stormkitty default rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Botnet

Default

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

https://api.telegram.org/bot6093966625:AAHk4dddHb8B1faCcFqL3um1gmB-f2mWhyc/sendMessage?chat_id=5529838804

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3616-117-0x00000000003A0000-0x00000000003D0000-memory.dmp	family_stormkitty

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/3616-117-0x00000000003A0000-0x00000000003D0000-memory.dmp	asyncrat

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Drops desktop.ini file(s) 8 IoCs

Processes:

Kurome.Builder v24.2.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Local\e4ef64c4776124f518e079b6b94c320d\Admin@RDOTXCCL_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Kurome.Builder v24.2.exe
File opened for modification	C:\Users\Admin\AppData\Local\e4ef64c4776124f518e079b6b94c320d\Admin@RDOTXCCL_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Kurome.Builder v24.2.exe
File created	C:\Users\Admin\AppData\Local\e4ef64c4776124f518e079b6b94c320d\Admin@RDOTXCCL_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	Kurome.Builder v24.2.exe
File opened for modification	C:\Users\Admin\AppData\Local\e4ef64c4776124f518e079b6b94c320d\Admin@RDOTXCCL_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	Kurome.Builder v24.2.exe
File created	C:\Users\Admin\AppData\Local\e4ef64c4776124f518e079b6b94c320d\Admin@RDOTXCCL_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	Kurome.Builder v24.2.exe
File created	C:\Users\Admin\AppData\Local\e4ef64c4776124f518e079b6b94c320d\Admin@RDOTXCCL_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	Kurome.Builder v24.2.exe
File created	C:\Users\Admin\AppData\Local\e4ef64c4776124f518e079b6b94c320d\Admin@RDOTXCCL_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini	Kurome.Builder v24.2.exe
File created	C:\Users\Admin\AppData\Local\e4ef64c4776124f518e079b6b94c320d\Admin@RDOTXCCL_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini	Kurome.Builder v24.2.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

2 icanhazip.com
Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.

flow	ioc
2	icanhazip.com

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Kurome.Builder v24.2.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	Kurome.Builder v24.2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Kurome.Builder v24.2.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

Processes:

Kurome.Builder v24.2.exe

pid	process
3616	Kurome.Builder v24.2.exe
3616	Kurome.Builder v24.2.exe
3616	Kurome.Builder v24.2.exe
3616	Kurome.Builder v24.2.exe
3616	Kurome.Builder v24.2.exe
3616	Kurome.Builder v24.2.exe
3616	Kurome.Builder v24.2.exe
3616	Kurome.Builder v24.2.exe
3616	Kurome.Builder v24.2.exe
3616	Kurome.Builder v24.2.exe
3616	Kurome.Builder v24.2.exe
3616	Kurome.Builder v24.2.exe
3616	Kurome.Builder v24.2.exe
3616	Kurome.Builder v24.2.exe
3616	Kurome.Builder v24.2.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Kurome.Builder v24.2.exe

description pid process

Token: SeDebugPrivilege 3616 Kurome.Builder v24.2.exe

description	pid	process
Token: SeDebugPrivilege	3616	Kurome.Builder v24.2.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

Kurome.Builder v24.2.execmd.execmd.exe

description	pid	process	target process
PID 3616 wrote to memory of 3872	3616	Kurome.Builder v24.2.exe	cmd.exe
PID 3616 wrote to memory of 3872	3616	Kurome.Builder v24.2.exe	cmd.exe
PID 3616 wrote to memory of 3872	3616	Kurome.Builder v24.2.exe	cmd.exe
PID 3872 wrote to memory of 4384	3872	cmd.exe	chcp.com
PID 3872 wrote to memory of 4384	3872	cmd.exe	chcp.com
PID 3872 wrote to memory of 4384	3872	cmd.exe	chcp.com
PID 3872 wrote to memory of 2948	3872	cmd.exe	netsh.exe
PID 3872 wrote to memory of 2948	3872	cmd.exe	netsh.exe
PID 3872 wrote to memory of 2948	3872	cmd.exe	netsh.exe
PID 3872 wrote to memory of 3544	3872	cmd.exe	findstr.exe
PID 3872 wrote to memory of 3544	3872	cmd.exe	findstr.exe
PID 3872 wrote to memory of 3544	3872	cmd.exe	findstr.exe
PID 3616 wrote to memory of 3468	3616	Kurome.Builder v24.2.exe	cmd.exe
PID 3616 wrote to memory of 3468	3616	Kurome.Builder v24.2.exe	cmd.exe
PID 3616 wrote to memory of 3468	3616	Kurome.Builder v24.2.exe	cmd.exe
PID 3468 wrote to memory of 2536	3468	cmd.exe	chcp.com
PID 3468 wrote to memory of 2536	3468	cmd.exe	chcp.com
PID 3468 wrote to memory of 2536	3468	cmd.exe	chcp.com
PID 3468 wrote to memory of 3684	3468	cmd.exe	netsh.exe
PID 3468 wrote to memory of 3684	3468	cmd.exe	netsh.exe
PID 3468 wrote to memory of 3684	3468	cmd.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\Redline Stealer v24.2 cracked [XT_CH]\Kurome.Builder\Kurome.Builder v24.2.exe
"C:\Users\Admin\AppData\Local\Temp\Redline Stealer v24.2 cracked [XT_CH]\Kurome.Builder\Kurome.Builder v24.2.exe"
1⤵
- Drops desktop.ini file(s)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3616

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
2⤵
- Suspicious use of WriteProcessMemory
PID:3872

C:\Windows\SysWOW64\chcp.com
chcp 65001
3⤵
PID:4384

C:\Windows\SysWOW64\netsh.exe
netsh wlan show profile
3⤵
PID:2948

C:\Windows\SysWOW64\findstr.exe
findstr All
3⤵
PID:3544

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
2⤵
- Suspicious use of WriteProcessMemory
PID:3468

C:\Windows\SysWOW64\chcp.com
chcp 65001
3⤵
PID:2536

C:\Windows\SysWOW64\netsh.exe
netsh wlan show networks mode=bssid
3⤵
PID:3684

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\e4ef64c4776124f518e079b6b94c320d\Admin@RDOTXCCL_en-US\System\Process.txt
Filesize
4KB

MD5
3971a31f1580a0518c6b3430fea9a600

SHA1
f08fd2d8d23e944570947d5f6a36932c2d233bef

SHA256
d69f0879546ba2172fb2554d223ab92df1762b8a27690ac603f652b753928abd

SHA512
b9394ff6723489393978423dd3eaebf46a08fc0fb8d077321c300e7fbd66ea1a1f05d00daf15aea787ff8615820c73c1b7042618e4f15a24e8a40e54cec82248

Download Submit
C:\Users\Admin\AppData\Local\e4ef64c4776124f518e079b6b94c320d\msgid.dat
Filesize
2B

MD5
d1fe173d08e959397adf34b1d77e88d7

SHA1
b74f5ee9461495ba5ca4c72a7108a23904c27a05

SHA256
98a3ab7c340e8a033e7b37b6ef9428751581760af67bbab2b9e05d4964a8874a

SHA512
7bf79737110a1d25ffc719d9a8df5f5caf32f9f270ba0a560cc320f3a30366a4b20bfad4a4b35119a0764a0130f96f0c505ef3537a2295f6ee8ac1acb8eb36d4

Download Submit
memory/3616-117-0x00000000003A0000-0x00000000003D0000-memory.dmp

Filesize
192KB

Download
memory/3616-118-0x0000000004D20000-0x0000000004D30000-memory.dmp

Filesize
64KB

Download
memory/3616-119-0x0000000004D30000-0x0000000004D96000-memory.dmp

Filesize
408KB

Download
memory/3616-201-0x0000000004D20000-0x0000000004D30000-memory.dmp

Filesize
64KB

Download
memory/3616-229-0x0000000004D20000-0x0000000004D30000-memory.dmp

Filesize
64KB

Download
memory/3616-230-0x00000000056C0000-0x0000000005752000-memory.dmp

Filesize
584KB

Download
memory/3616-231-0x0000000005C60000-0x000000000615E000-memory.dmp

Filesize
5.0MB

Download
memory/3616-235-0x00000000057E0000-0x00000000057EA000-memory.dmp

Filesize
40KB

Download
memory/3616-241-0x0000000006960000-0x0000000006972000-memory.dmp

Filesize
72KB

Download
memory/3616-264-0x0000000004D20000-0x0000000004D30000-memory.dmp

Filesize
64KB

Download