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Windows
Analysis Report
rU6YAgkoAw.exe
Overview
General Information
| Sample name: | rU6YAgkoAw.exerenamed because original name is a hash value |
| Original sample name: | 1f2ec9232f191e28fa8d5fbcbfad3a4f.exe |
| Analysis ID: | 1417077 |
| MD5: | 1f2ec9232f191e28fa8d5fbcbfad3a4f |
| SHA1: | ee22f5b25185c5a6d37e16d3eb52f9515fd6964d |
| SHA256: | b3b1a41903116bbc9fedd6403c9ad1976eefdcd50c322859f993a822b3bbac08 |
| Tags: | 32exetrojan |
| Infos: |   |
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Detection
AsyncRAT
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Antivirus detection for dropped file
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Yara detected AsyncRAT
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Allocates memory in foreign processes
Contains functionality to log keystrokes (.Net Source)
Drops executable to a common third party application directory
Drops large PE files
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Sample uses process hollowing technique
Sigma detected: Invoke-Obfuscation CLIP+ Launcher
Sigma detected: Invoke-Obfuscation VAR+ Launcher
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected Generic Downloader
AV process strings found (often used to terminate AV products)
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)
Checks if the current process is being debugged
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected TCP or UDP traffic on non-standard ports
Downloads executable code via HTTP
Dropped file seen in connection with other malware
Drops PE files
Enables debug privileges
Enables security privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found dropped PE file which has not been started or loaded
HTTP GET or POST without a user agent
May sleep (evasive loops) to hinder dynamic analysis
One or more processes crash
PE file contains executable resources (Code or Archives)
PE file contains more sections than normal
PE file contains sections with non-standard names
PE file does not import any functions
Queries keyboard layouts
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
Sigma detected: Suspicious Schtasks From Env Var Folder
Sigma detected: Use Short Name Path in Command Line
Tries to load missing DLLs
Uses 32bit PE files
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
Yara signature match
Classification
| 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 |
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AV Detection |
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