asyncrat | 6da2792e0500e75c0ce3b07c8cbfbc77d6b9e07260e5d28ca1a48d61df14c380

General

Target

CrashSmash.exe
Size

264KB
MD5

7c64ffb6d4b7fed10d9bc6c136ddcec4
SHA1

47b489693fe17be57f35abf272497f0d6abc1ca2
SHA256

6da2792e0500e75c0ce3b07c8cbfbc77d6b9e07260e5d28ca1a48d61df14c380
SHA512

5f48d0b4375e583582196b09cd8cb6c600b35e1df1607a4757aa91656312400dbe6a6fa1a71e4a525ae6830271c949746d27b6465bb9cb8ae8aaf8698d1ea261
SSDEEP

6144:qXtb5KcXr7XmfgqtjhAxZ0b2lDG/PHhiZC:EKcXrCf/QlZ

Score

10^/10

asyncrat stormkitty default discovery persistence privilege_escalation 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/bot6986026812:AAGMUhHJ6YNAvj-9EfaA1qFoj4rdW5DHGwo/sendMessage?chat_id=5912565656

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/3336-1-0x00000000005D0000-0x0000000000618000-memory.dmp	family_stormkitty

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Drops desktop.ini file(s) 8 IoCs

Processes:

CrashSmash.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Local\7d4e116d7913a9dab7bf3ab58c16012d\Admin@ERHQJVYQ_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	CrashSmash.exe
File created	C:\Users\Admin\AppData\Local\7d4e116d7913a9dab7bf3ab58c16012d\Admin@ERHQJVYQ_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	CrashSmash.exe
File opened for modification	C:\Users\Admin\AppData\Local\7d4e116d7913a9dab7bf3ab58c16012d\Admin@ERHQJVYQ_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	CrashSmash.exe
File opened for modification	C:\Users\Admin\AppData\Local\7d4e116d7913a9dab7bf3ab58c16012d\Admin@ERHQJVYQ_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	CrashSmash.exe
File created	C:\Users\Admin\AppData\Local\7d4e116d7913a9dab7bf3ab58c16012d\Admin@ERHQJVYQ_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	CrashSmash.exe
File created	C:\Users\Admin\AppData\Local\7d4e116d7913a9dab7bf3ab58c16012d\Admin@ERHQJVYQ_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	CrashSmash.exe
File created	C:\Users\Admin\AppData\Local\7d4e116d7913a9dab7bf3ab58c16012d\Admin@ERHQJVYQ_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini	CrashSmash.exe
File created	C:\Users\Admin\AppData\Local\7d4e116d7913a9dab7bf3ab58c16012d\Admin@ERHQJVYQ_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini	CrashSmash.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

24 icanhazip.com
Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.
Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217

flow	ioc
24	icanhazip.com

Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

Processes:

netsh.exenetsh.exe

description	ioc	process
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

chcp.comnetsh.exeCrashSmash.execmd.exechcp.comfindstr.exenetsh.execmd.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CrashSmash.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	findstr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

System Network Configuration Discovery: Wi-Fi Discovery 1 TTPs 2 IoCs
Adversaries may search for information about Wi-Fi networks, such as network names and passwords, on compromised systems.
discovery

Wi-Fi Discovery
T1016.002

Processes:

cmd.exenetsh.exe

pid process

1512 cmd.exe
824 netsh.exe

pid	process
1512	cmd.exe
824	netsh.exe

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:

CrashSmash.exe

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

Suspicious behavior: EnumeratesProcesses 25 IoCs

Processes:

CrashSmash.exe

pid	process
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe
3336	CrashSmash.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

CrashSmash.exe

description pid process

Token: SeDebugPrivilege 3336 CrashSmash.exe

description	pid	process
Token: SeDebugPrivilege	3336	CrashSmash.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

CrashSmash.execmd.execmd.exe

description	pid	process	target process
PID 3336 wrote to memory of 1512	3336	CrashSmash.exe	cmd.exe
PID 3336 wrote to memory of 1512	3336	CrashSmash.exe	cmd.exe
PID 3336 wrote to memory of 1512	3336	CrashSmash.exe	cmd.exe
PID 1512 wrote to memory of 4620	1512	cmd.exe	chcp.com
PID 1512 wrote to memory of 4620	1512	cmd.exe	chcp.com
PID 1512 wrote to memory of 4620	1512	cmd.exe	chcp.com
PID 1512 wrote to memory of 824	1512	cmd.exe	netsh.exe
PID 1512 wrote to memory of 824	1512	cmd.exe	netsh.exe
PID 1512 wrote to memory of 824	1512	cmd.exe	netsh.exe
PID 1512 wrote to memory of 932	1512	cmd.exe	findstr.exe
PID 1512 wrote to memory of 932	1512	cmd.exe	findstr.exe
PID 1512 wrote to memory of 932	1512	cmd.exe	findstr.exe
PID 3336 wrote to memory of 996	3336	CrashSmash.exe	cmd.exe
PID 3336 wrote to memory of 996	3336	CrashSmash.exe	cmd.exe
PID 3336 wrote to memory of 996	3336	CrashSmash.exe	cmd.exe
PID 996 wrote to memory of 1084	996	cmd.exe	chcp.com
PID 996 wrote to memory of 1084	996	cmd.exe	chcp.com
PID 996 wrote to memory of 1084	996	cmd.exe	chcp.com
PID 996 wrote to memory of 2684	996	cmd.exe	netsh.exe
PID 996 wrote to memory of 2684	996	cmd.exe	netsh.exe
PID 996 wrote to memory of 2684	996	cmd.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\CrashSmash.exe
"C:\Users\Admin\AppData\Local\Temp\CrashSmash.exe"
1⤵
- Drops desktop.ini file(s)
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3336

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
2⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Wi-Fi Discovery
- Suspicious use of WriteProcessMemory
PID:1512

C:\Windows\SysWOW64\chcp.com
chcp 65001
3⤵
- System Location Discovery: System Language Discovery
PID:4620

C:\Windows\SysWOW64\netsh.exe
netsh wlan show profile
3⤵
- Event Triggered Execution: Netsh Helper DLL
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Wi-Fi Discovery
PID:824

C:\Windows\SysWOW64\findstr.exe
findstr All
3⤵
- System Location Discovery: System Language Discovery
PID:932

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:996

C:\Windows\SysWOW64\chcp.com
chcp 65001
3⤵
- System Location Discovery: System Language Discovery
PID:1084

C:\Windows\SysWOW64\netsh.exe
netsh wlan show networks mode=bssid
3⤵
- Event Triggered Execution: Netsh Helper DLL
- System Location Discovery: System Language Discovery
PID:2684

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Browser Information Discovery

Query Registry

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Wi-Fi Discovery

1

T1016.002

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\7d4e116d7913a9dab7bf3ab58c16012d\Admin@ERHQJVYQ_en-US\Browsers\Firefox\Bookmarks.txt

Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
C:\Users\Admin\AppData\Local\7d4e116d7913a9dab7bf3ab58c16012d\Admin@ERHQJVYQ_en-US\System\Process.txt

Filesize
4KB

MD5
c41cf3b22f221c3218ccae767e6b9b24

SHA1
b4246bb011b934223f3f9d9c4e9ad78e4d5fcbb2

SHA256
57ff73e5fd36b273f2e6d881bffdadb20551d3aeb1ce9341bdfcd434b8090e09

SHA512
4bcc7d7534646cb27f81e362ef603e3c654e3034df4fc6bee6deabaf22a036ad34243e3284cda5a359b09793e6dc3b61f1cf4fb96ce061e5d80afd7cbe649f8a

Download Submit
C:\Users\Admin\AppData\Local\8fb59d67cfe559e22530d7f5a0ec92bd\msgid.dat

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/3336-3-0x0000000004FE0000-0x0000000005046000-memory.dmp

Filesize
408KB

Download
memory/3336-0-0x0000000074ABE000-0x0000000074ABF000-memory.dmp

Filesize
4KB

Download
memory/3336-124-0x0000000074ABE000-0x0000000074ABF000-memory.dmp

Filesize
4KB

Download
memory/3336-2-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/3336-144-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/3336-145-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/3336-147-0x0000000005B30000-0x0000000005BC2000-memory.dmp

Filesize
584KB

Download
memory/3336-148-0x0000000006180000-0x0000000006724000-memory.dmp

Filesize
5.6MB

Download
memory/3336-152-0x0000000005C60000-0x0000000005C6A000-memory.dmp

Filesize
40KB

Download
memory/3336-1-0x00000000005D0000-0x0000000000618000-memory.dmp

Filesize
288KB

Download
memory/3336-158-0x0000000005CF0000-0x0000000005D02000-memory.dmp

Filesize
72KB

Download
memory/3336-183-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads