asyncrat | 54bff116750016cbac31b375618ba2ac2c48ffcd4e5f3a9ed17fb47dc643f0b2

General

Target

Yahoo vip main.exe
Size

170KB
MD5

6d87862930811eb7b0ba7b9bf4ebe206
SHA1

b5157f5388f62b179d163201c330be0e8cada959
SHA256

54bff116750016cbac31b375618ba2ac2c48ffcd4e5f3a9ed17fb47dc643f0b2
SHA512

6e946c573b5d352612a382eb121d7973df1a62608d6a2c95644ac57066102c0c1d1902d4233baa20c737acf090ceeb975c8afd1b5d0eac3be39105192cf27d39
SSDEEP

3072:W3ST4aYp5zZb2faAaVZURF4AUwUMonU/4okDVqIPu/i9b4J2curxy+Wp6:AaozZQ7aVOwZXPSi9b04

Score

10^/10

asyncrat stormkitty default rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

https://api.telegram.org/bot5447971983:AAEyGzmpMnfnOMFAs-AZ8bfDhMbyzlgiMGU/sendMessage?chat_id=1996494138

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
behavioral2/memory/956-133-0x0000000000FC0000-0x0000000000FF0000-memory.dmp	family_stormkitty

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/956-133-0x0000000000FC0000-0x0000000000FF0000-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:

Yahoo vip main.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Local\8a6b6763f78719979d9a0eccad4af00e\Admin@UXINIZSV_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	Yahoo vip main.exe
File created	C:\Users\Admin\AppData\Local\8a6b6763f78719979d9a0eccad4af00e\Admin@UXINIZSV_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	Yahoo vip main.exe
File created	C:\Users\Admin\AppData\Local\8a6b6763f78719979d9a0eccad4af00e\Admin@UXINIZSV_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini	Yahoo vip main.exe
File created	C:\Users\Admin\AppData\Local\8a6b6763f78719979d9a0eccad4af00e\Admin@UXINIZSV_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini	Yahoo vip main.exe
File created	C:\Users\Admin\AppData\Local\8a6b6763f78719979d9a0eccad4af00e\Admin@UXINIZSV_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	Yahoo vip main.exe
File opened for modification	C:\Users\Admin\AppData\Local\8a6b6763f78719979d9a0eccad4af00e\Admin@UXINIZSV_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	Yahoo vip main.exe
File created	C:\Users\Admin\AppData\Local\8a6b6763f78719979d9a0eccad4af00e\Admin@UXINIZSV_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Yahoo vip main.exe
File opened for modification	C:\Users\Admin\AppData\Local\8a6b6763f78719979d9a0eccad4af00e\Admin@UXINIZSV_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Yahoo vip main.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

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

flow	ioc
25	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:

Yahoo vip main.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	Yahoo vip main.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Yahoo vip main.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

Processes:

Yahoo vip main.exe

pid	process
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe
956	Yahoo vip main.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Yahoo vip main.exe

description pid process

Token: SeDebugPrivilege 956 Yahoo vip main.exe

description	pid	process
Token: SeDebugPrivilege	956	Yahoo vip main.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

Yahoo vip main.execmd.execmd.exe

description	pid	process	target process
PID 956 wrote to memory of 3800	956	Yahoo vip main.exe	cmd.exe
PID 956 wrote to memory of 3800	956	Yahoo vip main.exe	cmd.exe
PID 956 wrote to memory of 3800	956	Yahoo vip main.exe	cmd.exe
PID 3800 wrote to memory of 1640	3800	cmd.exe	chcp.com
PID 3800 wrote to memory of 1640	3800	cmd.exe	chcp.com
PID 3800 wrote to memory of 1640	3800	cmd.exe	chcp.com
PID 3800 wrote to memory of 3704	3800	cmd.exe	netsh.exe
PID 3800 wrote to memory of 3704	3800	cmd.exe	netsh.exe
PID 3800 wrote to memory of 3704	3800	cmd.exe	netsh.exe
PID 3800 wrote to memory of 4232	3800	cmd.exe	findstr.exe
PID 3800 wrote to memory of 4232	3800	cmd.exe	findstr.exe
PID 3800 wrote to memory of 4232	3800	cmd.exe	findstr.exe
PID 956 wrote to memory of 4364	956	Yahoo vip main.exe	cmd.exe
PID 956 wrote to memory of 4364	956	Yahoo vip main.exe	cmd.exe
PID 956 wrote to memory of 4364	956	Yahoo vip main.exe	cmd.exe
PID 4364 wrote to memory of 4976	4364	cmd.exe	chcp.com
PID 4364 wrote to memory of 4976	4364	cmd.exe	chcp.com
PID 4364 wrote to memory of 4976	4364	cmd.exe	chcp.com
PID 4364 wrote to memory of 3532	4364	cmd.exe	netsh.exe
PID 4364 wrote to memory of 3532	4364	cmd.exe	netsh.exe
PID 4364 wrote to memory of 3532	4364	cmd.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\Yahoo vip main.exe
"C:\Users\Admin\AppData\Local\Temp\Yahoo vip main.exe"
1⤵
- Drops desktop.ini file(s)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:956

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
2⤵
- Suspicious use of WriteProcessMemory
PID:3800

C:\Windows\SysWOW64\chcp.com
chcp 65001
3⤵
PID:1640

C:\Windows\SysWOW64\netsh.exe
netsh wlan show profile
3⤵
PID:3704

C:\Windows\SysWOW64\findstr.exe
findstr All
3⤵
PID:4232

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
2⤵
- Suspicious use of WriteProcessMemory
PID:4364

C:\Windows\SysWOW64\chcp.com
chcp 65001
3⤵
PID:4976

C:\Windows\SysWOW64\netsh.exe
netsh wlan show networks mode=bssid
3⤵
PID:3532

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\8a6b6763f78719979d9a0eccad4af00e\Admin@UXINIZSV_en-US\Browsers\Firefox\Bookmarks.txt
Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
C:\Users\Admin\AppData\Local\8a6b6763f78719979d9a0eccad4af00e\Admin@UXINIZSV_en-US\System\Process.txt
Filesize
4KB

MD5
80aa4be556d9f68987a8605cb6da5d64

SHA1
535876b45c91929cf17c5594583b17e7c2c9a416

SHA256
d8af19c00698468cf7a1f3840169f8edf3dd24ff348b32a61511f8d53ea47c81

SHA512
e1de02960d92bcdcfa8641c39bf818e9f40f64336e4d4637bb2fe89f37d1b105aaaaad9f03e9cffe5ac70361df9bf001024a188f17f90026705e27ed94516f0c

Download Submit
C:\Users\Admin\AppData\Local\9ea04b89ddac6a813ae4bd70415105ec\msgid.dat
Filesize
4B

MD5
0060ef47b12160b9198302ebdb144dcf

SHA1
b74721f0cd0cd21b1ce967f427280881fe9132fb

SHA256
9652ec3b28f1be86a028807d42b718b02493202a3a3ab9b0dab54846e3f57b60

SHA512
f9f3f2d259ad3afb20eaa0b13d3f3344da0f2de70144a6a805077a94973e2d46f40b70e1e05dbb2dad73d1153cc518ed885f8dcb1ea7db9aa250ad2b1575e8eb

Download Submit
memory/956-277-0x00000000068B0000-0x0000000006942000-memory.dmp

Filesize
584KB

Download
memory/956-219-0x0000000005970000-0x0000000005980000-memory.dmp

Filesize
64KB

Download
memory/956-135-0x0000000005A80000-0x0000000005AE6000-memory.dmp

Filesize
408KB

Download
memory/956-133-0x0000000000FC0000-0x0000000000FF0000-memory.dmp

Filesize
192KB

Download
memory/956-278-0x0000000006F00000-0x00000000074A4000-memory.dmp

Filesize
5.6MB

Download
memory/956-280-0x0000000005970000-0x0000000005980000-memory.dmp

Filesize
64KB

Download
memory/956-283-0x0000000006AF0000-0x0000000006AFA000-memory.dmp

Filesize
40KB

Download
memory/956-134-0x0000000005970000-0x0000000005980000-memory.dmp

Filesize
64KB

Download
memory/956-289-0x0000000007770000-0x0000000007782000-memory.dmp

Filesize
72KB

Download
memory/956-312-0x0000000005970000-0x0000000005980000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads