asyncrat | 6da2792e0500e75c0ce3b07c8cbfbc77d6b9e07260e5d28ca1a48d61df14c380

Analysis

max time kernel
148s
max time network
121s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
01-10-2024 19:13

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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

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

resource	yara_rule
behavioral1/memory/3056-1-0x0000000000D20000-0x0000000000D68000-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) 7 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\c63bf79521a4cce51b620c7d7be62ebb\Admin@MUYDDIIS_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	CrashSmash.exe
File opened for modification	C:\Users\Admin\AppData\Local\c63bf79521a4cce51b620c7d7be62ebb\Admin@MUYDDIIS_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	CrashSmash.exe
File created	C:\Users\Admin\AppData\Local\c63bf79521a4cce51b620c7d7be62ebb\Admin@MUYDDIIS_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	CrashSmash.exe
File opened for modification	C:\Users\Admin\AppData\Local\c63bf79521a4cce51b620c7d7be62ebb\Admin@MUYDDIIS_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	CrashSmash.exe
File created	C:\Users\Admin\AppData\Local\c63bf79521a4cce51b620c7d7be62ebb\Admin@MUYDDIIS_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	CrashSmash.exe
File created	C:\Users\Admin\AppData\Local\c63bf79521a4cce51b620c7d7be62ebb\Admin@MUYDDIIS_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	CrashSmash.exe
File opened for modification	C:\Users\Admin\AppData\Local\c63bf79521a4cce51b620c7d7be62ebb\Admin@MUYDDIIS_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\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.

flow	ioc
4	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

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

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

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

pid	Process
3040	cmd.exe
2888	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

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

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3056	CrashSmash.exe
3056	CrashSmash.exe
3056	CrashSmash.exe
3056	CrashSmash.exe
3056	CrashSmash.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3056	CrashSmash.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 3056 wrote to memory of 3040	3056	CrashSmash.exe	31
PID 3056 wrote to memory of 3040	3056	CrashSmash.exe	31
PID 3056 wrote to memory of 3040	3056	CrashSmash.exe	31
PID 3056 wrote to memory of 3040	3056	CrashSmash.exe	31
PID 3040 wrote to memory of 2688	3040	cmd.exe	33
PID 3040 wrote to memory of 2688	3040	cmd.exe	33
PID 3040 wrote to memory of 2688	3040	cmd.exe	33
PID 3040 wrote to memory of 2688	3040	cmd.exe	33
PID 3040 wrote to memory of 2888	3040	cmd.exe	34
PID 3040 wrote to memory of 2888	3040	cmd.exe	34
PID 3040 wrote to memory of 2888	3040	cmd.exe	34
PID 3040 wrote to memory of 2888	3040	cmd.exe	34
PID 3040 wrote to memory of 2904	3040	cmd.exe	35
PID 3040 wrote to memory of 2904	3040	cmd.exe	35
PID 3040 wrote to memory of 2904	3040	cmd.exe	35
PID 3040 wrote to memory of 2904	3040	cmd.exe	35
PID 3056 wrote to memory of 2984	3056	CrashSmash.exe	36
PID 3056 wrote to memory of 2984	3056	CrashSmash.exe	36
PID 3056 wrote to memory of 2984	3056	CrashSmash.exe	36
PID 3056 wrote to memory of 2984	3056	CrashSmash.exe	36
PID 2984 wrote to memory of 2968	2984	cmd.exe	38
PID 2984 wrote to memory of 2968	2984	cmd.exe	38
PID 2984 wrote to memory of 2968	2984	cmd.exe	38
PID 2984 wrote to memory of 2968	2984	cmd.exe	38
PID 2984 wrote to memory of 1680	2984	cmd.exe	39
PID 2984 wrote to memory of 1680	2984	cmd.exe	39
PID 2984 wrote to memory of 1680	2984	cmd.exe	39
PID 2984 wrote to memory of 1680	2984	cmd.exe	39

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:3056
- 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:3040
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2688
- - 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:2888
- - C:\Windows\SysWOW64\findstr.exe
    findstr All
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2904
- 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:2984
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2968
- - 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:1680

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Wi-Fi Discovery

T1016.002

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\2cb8d0861f660b8949bc96674c9dee2c\msgid.dat

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
C:\Users\Admin\AppData\Local\c63bf79521a4cce51b620c7d7be62ebb\Admin@MUYDDIIS_en-US\Browsers\Firefox\Bookmarks.txt

Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
memory/3056-0-0x0000000073F7E000-0x0000000073F7F000-memory.dmp

Filesize
4KB

Download
memory/3056-1-0x0000000000D20000-0x0000000000D68000-memory.dmp

Filesize
288KB

Download
memory/3056-2-0x0000000073F70000-0x000000007465E000-memory.dmp

Filesize
6.9MB

Download
memory/3056-72-0x0000000073F70000-0x000000007465E000-memory.dmp

Filesize
6.9MB

Download
memory/3056-76-0x0000000073F7E000-0x0000000073F7F000-memory.dmp

Filesize
4KB

Download
memory/3056-77-0x0000000073F70000-0x000000007465E000-memory.dmp

Filesize
6.9MB

Download
memory/3056-83-0x0000000073F70000-0x000000007465E000-memory.dmp

Filesize
6.9MB

Download