asyncrat | 85ca4cd1bdc0b219e0513bca055913d18debf0e6ef752a5814cb9b87af2bd646

General

Target

a0.exe
Size

170KB
MD5

a0ce182a26b24adf936411f4ea796ab7
SHA1

a764ea86541665181d7080fe2a2c534a6acc6c5b
SHA256

85ca4cd1bdc0b219e0513bca055913d18debf0e6ef752a5814cb9b87af2bd646
SHA512

de9db377614cfead6043022d2413d47821cd38dd5e751a6e91d3e37db4965217c92607495e15dcee834afec4fd22490635cd0377ec6f510126bf65dd4824b69b
SSDEEP

3072:T+STW8djpN6izj8mZw24FBPBrL2eFcyZlVqIPu/i9bDq2cKk6+Wpn:w8XN6W8mm2anrL2eFcyvVXPSi9b+

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/bot5081755732:AAFIzASZTZ42XUhPubF2E6ugH8B5BoBq2GY/sendMessage?chat_id=1184265544

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/4608-133-0x00000000006E0000-0x0000000000710000-memory.dmp	family_stormkitty

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4608-133-0x00000000006E0000-0x0000000000710000-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) 9 IoCs

Processes:

a0.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Local\5c1b4d6bab16ab04fc923bd6105addbc\Admin@ROBKQPFG_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	a0.exe
File created	C:\Users\Admin\AppData\Local\5c1b4d6bab16ab04fc923bd6105addbc\Admin@ROBKQPFG_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	a0.exe
File opened for modification	C:\Users\Admin\AppData\Local\5c1b4d6bab16ab04fc923bd6105addbc\Admin@ROBKQPFG_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	a0.exe
File created	C:\Users\Admin\AppData\Local\5c1b4d6bab16ab04fc923bd6105addbc\Admin@ROBKQPFG_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	a0.exe
File opened for modification	C:\Users\Admin\AppData\Local\5c1b4d6bab16ab04fc923bd6105addbc\Admin@ROBKQPFG_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	a0.exe
File created	C:\Users\Admin\AppData\Local\5c1b4d6bab16ab04fc923bd6105addbc\Admin@ROBKQPFG_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	a0.exe
File created	C:\Users\Admin\AppData\Local\5c1b4d6bab16ab04fc923bd6105addbc\Admin@ROBKQPFG_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini	a0.exe
File opened for modification	C:\Users\Admin\AppData\Local\5c1b4d6bab16ab04fc923bd6105addbc\Admin@ROBKQPFG_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	a0.exe
File created	C:\Users\Admin\AppData\Local\5c1b4d6bab16ab04fc923bd6105addbc\Admin@ROBKQPFG_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini	a0.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

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

flow	ioc
30	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:

a0.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	a0.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	a0.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

Processes:

a0.exe

pid	process
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe
4608	a0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

a0.exe

description pid process

Token: SeDebugPrivilege 4608 a0.exe

description	pid	process
Token: SeDebugPrivilege	4608	a0.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

a0.execmd.execmd.exe

description	pid	process	target process
PID 4608 wrote to memory of 5032	4608	a0.exe	cmd.exe
PID 4608 wrote to memory of 5032	4608	a0.exe	cmd.exe
PID 4608 wrote to memory of 5032	4608	a0.exe	cmd.exe
PID 5032 wrote to memory of 3424	5032	cmd.exe	chcp.com
PID 5032 wrote to memory of 3424	5032	cmd.exe	chcp.com
PID 5032 wrote to memory of 3424	5032	cmd.exe	chcp.com
PID 5032 wrote to memory of 4224	5032	cmd.exe	netsh.exe
PID 5032 wrote to memory of 4224	5032	cmd.exe	netsh.exe
PID 5032 wrote to memory of 4224	5032	cmd.exe	netsh.exe
PID 5032 wrote to memory of 4216	5032	cmd.exe	findstr.exe
PID 5032 wrote to memory of 4216	5032	cmd.exe	findstr.exe
PID 5032 wrote to memory of 4216	5032	cmd.exe	findstr.exe
PID 4608 wrote to memory of 3476	4608	a0.exe	cmd.exe
PID 4608 wrote to memory of 3476	4608	a0.exe	cmd.exe
PID 4608 wrote to memory of 3476	4608	a0.exe	cmd.exe
PID 3476 wrote to memory of 4028	3476	cmd.exe	chcp.com
PID 3476 wrote to memory of 4028	3476	cmd.exe	chcp.com
PID 3476 wrote to memory of 4028	3476	cmd.exe	chcp.com
PID 3476 wrote to memory of 4464	3476	cmd.exe	netsh.exe
PID 3476 wrote to memory of 4464	3476	cmd.exe	netsh.exe
PID 3476 wrote to memory of 4464	3476	cmd.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\a0.exe
"C:\Users\Admin\AppData\Local\Temp\a0.exe"
1⤵
- Drops desktop.ini file(s)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4608

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
2⤵
- Suspicious use of WriteProcessMemory
PID:5032

C:\Windows\SysWOW64\chcp.com
chcp 65001
3⤵
PID:3424

C:\Windows\SysWOW64\netsh.exe
netsh wlan show profile
3⤵
PID:4224

C:\Windows\SysWOW64\findstr.exe
findstr All
3⤵
PID:4216

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
2⤵
- Suspicious use of WriteProcessMemory
PID:3476

C:\Windows\SysWOW64\chcp.com
chcp 65001
3⤵
PID:4028

C:\Windows\SysWOW64\netsh.exe
netsh wlan show networks mode=bssid
3⤵
PID:4464

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\5c1b4d6bab16ab04fc923bd6105addbc\Admin@ROBKQPFG_en-US\System\Process.txt
Filesize
4KB

MD5
5227152178d38972478d94d20dc00a6c

SHA1
55bf99c838f2d4008e37e6276a1b14d860cf6daf

SHA256
beb68c766870eedeabda216fee5bd4c593e1832f8c2b99f0bbc192fb5836dd5d

SHA512
50b91c86170fcf037408b435ddb26361cd7014581709a9cebb8389c02233114f9c98962b9641af438916b179653cf87ec84a9de81af5a7670393527af21e80d6

Download Submit
C:\Users\Admin\AppData\Local\c68c3832e6261ad2ce43d41b243d6c46\msgid.dat
Filesize
3B

MD5
0a113ef6b61820daa5611c870ed8d5ee

SHA1
eaa67f3a93d0acb08d8a5e8ff9866f51983b3c3b

SHA256
5e968ce47ce4a17e3823c29332a39d049a8d0afb08d157eb6224625f92671a51

SHA512
bb602aa6ebb8decd4a7293b1c428cf4889df083d0984378ceefc600a371ac96de20ed1fbc8adf3baa8e63a28d20b750b1dd2512c51cf78490b602b5bc50e47c1

Download Submit
memory/4608-133-0x00000000006E0000-0x0000000000710000-memory.dmp

Filesize
192KB

Download
memory/4608-134-0x00000000051A0000-0x00000000051B0000-memory.dmp

Filesize
64KB

Download
memory/4608-135-0x00000000053B0000-0x0000000005416000-memory.dmp

Filesize
408KB

Download
memory/4608-221-0x00000000051A0000-0x00000000051B0000-memory.dmp

Filesize
64KB

Download
memory/4608-279-0x0000000005FD0000-0x0000000006062000-memory.dmp

Filesize
584KB

Download
memory/4608-280-0x0000000006620000-0x0000000006BC4000-memory.dmp

Filesize
5.6MB

Download
memory/4608-282-0x00000000051A0000-0x00000000051B0000-memory.dmp

Filesize
64KB

Download
memory/4608-285-0x00000000060F0000-0x00000000060FA000-memory.dmp

Filesize
40KB

Download
memory/4608-291-0x0000000006110000-0x0000000006122000-memory.dmp

Filesize
72KB

Download
memory/4608-315-0x00000000051A0000-0x00000000051B0000-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