Windows
Analysis Report
250427-yfs7ca1my6.bin.exe
Overview
General Information
Detection
AsyncRAT
Score: | 100 |
Range: | 0 - 100 |
Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Yara detected AsyncRAT
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Joe Sandbox ML detected suspicious sample
Protects its processes via BreakOnTermination flag
Sample uses string decryption to hide its real strings
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 schtasks.exe or at.exe to add and modify task schedules
Allocates memory with a write watch (potentially for evading sandboxes)
Checks if the current process is being debugged
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
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)
May sleep (evasive loops) to hinder dynamic analysis
Queries sensitive Operating System Information (via WMI, Win32_ComputerSystem, often done 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
Sigma detected: Suspicious Schtasks From Env Var Folder
Tries to resolve domain names, but no domain seems valid (expired dropper behavior)
Uses 32bit PE files
Yara signature match
Classification
- System is w10x64
250427-yfs7ca1my6.bin.exe (PID: 8188 cmdline:
"C:\Users\ user\Deskt op\250427- yfs7ca1my6 .bin.exe" MD5: 618432B575574E0A4C43EB072FDAD14C) cmd.exe (PID: 940 cmdline:
"C:\Window s\System32 \cmd.exe" /c schtask s /create /f /sc onl ogon /rl h ighest /tn "AntiViru s" /tr '"C :\Users\us er\AppData \Roaming\A ntiVirus.e xe"' & exi t MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) conhost.exe (PID: 3096 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) schtasks.exe (PID: 7972 cmdline:
schtasks / create /f /sc onlogo n /rl high est /tn "A ntiVirus" /tr '"C:\U sers\user\ AppData\Ro aming\Anti Virus.exe" ' MD5: 48C2FE20575769DE916F48EF0676A965) cmd.exe (PID: 8084 cmdline:
C:\Windows \system32\ cmd.exe /c ""C:\User s\user\App Data\Local \Temp\tmpF 95D.tmp.ba t"" MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) conhost.exe (PID: 2916 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) timeout.exe (PID: 7904 cmdline:
timeout 3 MD5: 976566BEEFCCA4A159ECBDB2D4B1A3E3) AntiVirus.exe (PID: 1488 cmdline:
"C:\Users\ user\AppDa ta\Roaming \AntiVirus .exe" MD5: 618432B575574E0A4C43EB072FDAD14C)
AntiVirus.exe (PID: 7568 cmdline:
C:\Users\u ser\AppDat a\Roaming\ AntiVirus. exe MD5: 618432B575574E0A4C43EB072FDAD14C)
- cleanup
Name | Description | Attribution | Blogpost URLs | Link |
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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.AsyncRAT as delivered by MintsLoader includes a PowerShell module with a DGA. The DGA is similar to MintsLoader's DGA, but generates more domains and uses more than one TLD. | No Attribution |
⊘No configs have been found
Source | Rule | Description | Author | Strings |
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JoeSecurity_AsyncRAT | Yara detected AsyncRAT | Joe Security | ||
Windows_Trojan_Asyncrat_11a11ba1 | unknown | unknown |
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rat_win_asyncrat | Detect AsyncRAT based on specific strings | Sekoia.io |
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INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse | Detects file containing reversed ASEP Autorun registry keys | ditekSHen |
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Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_AsyncRAT | Yara detected AsyncRAT | Joe Security | ||
Windows_Trojan_Asyncrat_11a11ba1 | unknown | unknown |
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rat_win_asyncrat | Detect AsyncRAT based on specific strings | Sekoia.io |
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INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse | Detects file containing reversed ASEP Autorun registry keys | ditekSHen |
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Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_AsyncRAT | Yara detected AsyncRAT | Joe Security | ||
Windows_Trojan_Asyncrat_11a11ba1 | unknown | unknown |
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INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse | Detects file containing reversed ASEP Autorun registry keys | ditekSHen |
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JoeSecurity_AsyncRAT | Yara detected AsyncRAT | Joe Security | ||
INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse | Detects file containing reversed ASEP Autorun registry keys | ditekSHen |
| |
Click to see the 8 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_AsyncRAT | Yara detected AsyncRAT | Joe Security | ||
Windows_Trojan_Asyncrat_11a11ba1 | unknown | unknown |
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rat_win_asyncrat | Detect AsyncRAT based on specific strings | Sekoia.io |
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INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse | Detects file containing reversed ASEP Autorun registry keys | ditekSHen |
| |
JoeSecurity_AsyncRAT | Yara detected AsyncRAT | Joe Security | ||
Click to see the 6 entries |
System Summary |
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Source: | Author: Jonathan Cheong, oscd.community: |
Source: | Author: Jonathan Cheong, oscd.community: |
Source: | Author: Florian Roth (Nextron Systems): |
⊘No Suricata rule has matched
- • AV Detection
- • Compliance
- • Networking
- • Key, Mouse, Clipboard, Microphone and Screen Capturing
- • Operating System Destruction
- • System Summary
- • Data Obfuscation
- • Persistence and Installation Behavior
- • Boot Survival
- • Hooking and other Techniques for Hiding and Protection
- • Malware Analysis System Evasion
- • Anti Debugging
- • HIPS / PFW / Operating System Protection Evasion
- • Language, Device and Operating System Detection
- • Lowering of HIPS / PFW / Operating System Security Settings
Click to jump to signature section
Show All Signature Results
AV Detection |
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Key, Mouse, Clipboard, Microphone and Screen Capturing |
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Operating System Destruction |
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Source: | Process information set: | Jump to behavior | ||
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System Summary |
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Source: | Code function: | 0_2_00CB4088 | |
Source: | Code function: | 0_2_00CB4958 | |
Source: | Code function: | 0_2_00CB5B20 | |
Source: | Code function: | 0_2_00CB3D40 | |
Source: | Code function: | 12_2_00C04088 | |
Source: | Code function: | 12_2_00C04958 | |
Source: | Code function: | 12_2_00C05B20 | |
Source: | Code function: | 12_2_00C03D40 |
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