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Windows
Analysis Report
AsyncClient.exe
Overview
General Information
Detection
AsyncRAT, HVNC, PureLog Stealer
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Yara detected AsyncRAT
Yara detected HVNC
Yara detected Powershell download and execute
Yara detected PureLog Stealer
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains suspicious base64 encoded strings
.NET source code contains very large strings
AI detected suspicious sample
Bypasses PowerShell execution policy
Machine Learning detection for dropped file
Machine Learning detection for sample
Sigma detected: Explorer NOUACCHECK Flag
Sigma detected: Suspicious Script Execution From Temp Folder
Suspicious powershell command line found
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected Generic Downloader
AV process strings found (often used to terminate AV products)
Abnormal high CPU Usage
Allocates memory with a write watch (potentially for evading sandboxes)
Binary contains a suspicious time stamp
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Contains functionality for execution timing, often used to detect debuggers
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Creates files inside the system directory
Detected potential crypto function
Drops PE files
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found large amount of non-executed APIs
HTTP GET or POST without a user agent
IP address seen in connection with other malware
Internet Provider seen in connection with other malware
May check the online IP address of the machine
May sleep (evasive loops) to hinder dynamic analysis
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Queries disk information (often used to detect virtual machines)
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sample file is different than original file name gathered from version info
Stores large binary data to the registry
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)
Yara detected Credential Stealer
Yara signature match
Classification
- System is w10x64
- AsyncClient.exe (PID: 4300 cmdline:
"C:\Users\ user\Deskt op\AsyncCl ient.exe" MD5: DA0C2AB9E92A4D36B177AE380E91FEDA) - cmd.exe (PID: 4628 cmdline:
"C:\Window s\System32 \cmd.exe" /c start / b powershe ll Executi onPolicy B ypass Star t-Process -FilePath '"C:\Users \user\AppD ata\Local\ Temp\hklug q.exe"' & exit MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) - conhost.exe (PID: 6924 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - powershell.exe (PID: 2852 cmdline:
powershell Executio nPolicy By pass Start -Process - FilePath ' "C:\Users\ user\AppDa ta\Local\T emp\hklugq .exe"' MD5: C32CA4ACFCC635EC1EA6ED8A34DF5FAC) - hklugq.exe (PID: 3800 cmdline:
"C:\Users\ user\AppDa ta\Local\T emp\hklugq .exe" MD5: 5890798F97F9144206499433A5DB3011) - explorer.exe (PID: 2068 cmdline:
"C:\Window s\explorer .exe" MD5: 662F4F92FDE3557E86D110526BB578D5) - hklugq.exe (PID: 4268 cmdline:
"C:\Users\ user\AppDa ta\Local\T emp\hklugq .exe" MD5: 5890798F97F9144206499433A5DB3011) - conhost.exe (PID: 6992 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D)
- svchost.exe (PID: 500 cmdline:
C:\Windows \System32\ svchost.ex e -k netsv cs -p -s B ITS MD5: B7F884C1B74A263F746EE12A5F7C9F6A)
- explorer.exe (PID: 3392 cmdline:
C:\Windows \explorer. exe /NoUAC Check MD5: 662F4F92FDE3557E86D110526BB578D5)
- cleanup
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
AsyncRAT | AsyncRAT is a Remote Access Tool (RAT) designed to remotely monitor and control other computers through a secure encrypted connection. It is an open source remote administration tool, however, it could also be used maliciously because it provides functionality such as keylogger, remote desktop control, and many other functions that may cause harm to the victims computer. In addition, AsyncRAT can be delivered via various methods such as spear-phishing, malvertising, exploit kit and other techniques. | No Attribution |
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
Pandora RAT, Pandora hVNC RAT | No Attribution |
{"Server": "82.64.156.123", "Port": "80", "Version": "0.5.8", "MutexName": "9mzImB3NUR0Q", "Autorun": "false", "Group": "null"}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_AsyncRAT | Yara detected AsyncRAT | Joe Security | ||
JoeSecurity_GenericDownloader_1 | Yara detected Generic Downloader | Joe Security | ||
Windows_Trojan_Asyncrat_11a11ba1 | unknown | unknown |
| |
INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse | Detects file containing reversed ASEP Autorun registry keys | ditekSHen |
|
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_AsyncRAT | Yara detected AsyncRAT | Joe Security | ||
INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse | Detects file containing reversed ASEP Autorun registry keys | ditekSHen |
| |
JoeSecurity_HVNC | Yara detected HVNC | Joe Security | ||
JoeSecurity_CredentialStealer | Yara detected Credential Stealer | Joe Security | ||
JoeSecurity_GenericDownloader_1 | Yara detected Generic Downloader | Joe Security | ||
Click to see the 20 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_AsyncRAT | Yara detected AsyncRAT | Joe Security | ||
Windows_Trojan_Asyncrat_11a11ba1 | unknown | unknown |
| |
INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse | Detects file containing reversed ASEP Autorun registry keys | ditekSHen |
| |
JoeSecurity_PureLogStealer | Yara detected PureLog Stealer | Joe Security | ||
JoeSecurity_PureLogStealer | Yara detected PureLog Stealer | Joe Security | ||
Click to see the 14 entries |
System Summary |
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Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems), Max Altgelt (Nextron Systems), Tim Shelton: |
Source: | Author: Roberto Rodriguez @Cyb3rWard0g (rule), oscd.community (improvements): |
Source: | Author: vburov: |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-12-13T11:58:53.411663+0100 | 2035595 | 1 | Domain Observed Used for C2 Detected | 82.64.156.123 | 80 | 192.168.2.8 | 49704 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-12-13T11:58:53.411663+0100 | 2035607 | 1 | Domain Observed Used for C2 Detected | 82.64.156.123 | 80 | 192.168.2.8 | 49704 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-12-13T11:58:53.411663+0100 | 2842478 | 1 | Malware Command and Control Activity Detected | 82.64.156.123 | 80 | 192.168.2.8 | 49704 | TCP |
2024-12-13T11:59:02.195658+0100 | 2842478 | 1 | Malware Command and Control Activity Detected | 82.64.156.123 | 80 | 192.168.2.8 | 49706 | TCP |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Networking |
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Source: | HTTP traffic detected: |
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Source: | String found in binary or memory: | ||
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Key, Mouse, Clipboard, Microphone and Screen Capturing |
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System Summary |
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Source: | Base64 encoded string: | ||
Source: | Base64 encoded string: |
Source: | Long String: |
Source: | Process Stats: |
Source: | File created: | Jump to behavior |
Source: | Code function: | 0_2_028CC1A0 | |
Source: | Code function: | 0_2_028C65C0 | |
Source: | Code function: | 0_2_028CBE40 | |
Source: | Code function: | 0_2_028C5CF0 | |
Source: | Code function: | 0_2_028CC190 | |
Source: | Code function: | 0_2_028CA7A8 | |
Source: | Code function: | 0_2_028C59A8 | |
Source: | Code function: | 0_2_028CBE2F | |
Source: | Code function: | 0_2_06ABA2B8 | |
Source: | Code function: | 0_2_06AB9A98 | |
Source: | Code function: | 0_2_06ABA2A8 | |
Source: | Code function: | 0_2_06B68C98 | |
Source: | Code function: | 0_2_06B64A98 | |
Source: | Code function: | 0_2_06B67318 | |
Source: | Code function: | 0_2_06B6A090 | |
Source: | Code function: | 0_2_06B62948 | |
Source: | Code function: | 0_2_06B63F80 | |
Source: | Code function: | 0_2_06B6ADB0 | |
Source: | Code function: | 0_2_06B61170 | |
Source: | Code function: | 0_2_06BD0480 | |
Source: | Code function: | 0_2_06BD0410 | |
Source: | Code function: | 0_2_06BD49B1 | |
Source: | Code function: | 0_2_06BD4DE1 | |
Source: | Code function: | 0_2_06BD49C0 | |
Source: | Code function: | 0_2_06C3A000 | |
Source: | Code function: | 0_2_06C3A010 | |
Source: | Code function: | 0_2_06C3A010 | |
Source: | Code function: | 5_2_02CAD9DC | |
Source: | Code function: | 5_2_07327097 | |
Source: | Code function: | 5_2_073260C0 | |
Source: | Code function: | 5_2_0732A1C1 | |
Source: | Code function: | 11_2_012DA047 | |
Source: | Code function: | 11_2_012DA058 |
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Source: | Base64 encoded string: |