Windows
Analysis Report
PI1qW7yV9K.exe
Overview
General Information
Sample name: | PI1qW7yV9K.exerenamed because original name is a hash value |
Original sample name: | af8da7f9142ae9bdee1fa3be93f0c8c1.exe |
Analysis ID: | 1665177 |
MD5: | af8da7f9142ae9bdee1fa3be93f0c8c1 |
SHA1: | de5d591e4013f4fa6115a30e3c71d83b74c10bf9 |
SHA256: | 4a6389fb42a4918ca6b7aec6c86a4e945f85dfb6490f873f9be24fa5c7f9df06 |
Tags: | exeuser-abuse_ch |
Infos: | |
Detection
PureLog Stealer, Quasar
Score: | 100 |
Range: | 0 - 100 |
Confidence: | 100% |
Signatures
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
System process connects to network (likely due to code injection or exploit)
Yara detected PureLog Stealer
Yara detected Quasar RAT
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Bypasses PowerShell execution policy
Creates a thread in another existing process (thread injection)
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects code into the Windows Explorer (explorer.exe)
Joe Sandbox ML detected suspicious sample
Queries sensitive service information (via WMI, MSSMBios_RawSMBiosTables, often done to detect sandboxes)
Queries temperature or sensor information (via WMI often done to detect virtual machines)
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: Script Interpreter Execution From Suspicious Folder
Sigma detected: Suspicious Script Execution From Temp Folder
Suspicious powershell command line found
Writes to foreign memory regions
Allocates memory with a write watch (potentially for evading sandboxes)
Binary contains a suspicious time stamp
Compiles C# or VB.Net code
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Creates files inside the system directory
Deletes files inside the Windows folder
Detected TCP or UDP traffic on non-standard ports
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 dropped PE file which has not been started or loaded
Found inlined nop instructions (likely shell or obfuscated code)
IP address seen in connection with other malware
Internet Provider seen in connection with other malware
JA3 SSL client fingerprint seen in connection with other malware
May check the online IP address of the machine
May sleep (evasive loops) to hinder dynamic analysis
PE file contains executable resources (Code or Archives)
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive Operating System Information (via WMI, Win32_ComputerSystem, often done to detect virtual machines)
Queries sensitive processor information (via WMI, Win32_Processor, often done to detect virtual machines)
Queries the volume information (name, serial number etc) of a device
Sample file is different than original file name gathered from version info
Sigma detected: Alternate PowerShell Hosts - PowerShell Module
Sigma detected: Change PowerShell Policies to an Insecure Level
Sigma detected: Dynamic .NET Compilation Via Csc.EXE
Sigma detected: Uncommon Svchost Parent Process
Uses 32bit PE files
Uses a known web browser user agent for HTTP communication
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
- System is w10x64
PI1qW7yV9K.exe (PID: 7384 cmdline:
"C:\Users\ user\Deskt op\PI1qW7y V9K.exe" MD5: AF8DA7F9142AE9BDEE1FA3BE93F0C8C1) conhost.exe (PID: 7440 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) powershell.exe (PID: 7816 cmdline:
"C:\Window s\sysnativ e\WindowsP owerShell\ v1.0\power shell.exe" -Executio nPolicy By pass -Wind owStyle Hi dden -NonI nteractive -File "C: \Users\use r\AppData\ Local\Temp \ace9e5a3- 2f4b-4e08- b92c-ed7f0 e4c1ad2.ps 1" MD5: 04029E121A0CFA5991749937DD22A1D9) conhost.exe (PID: 7888 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) csc.exe (PID: 6192 cmdline:
"C:\Window s\Microsof t.NET\Fram ework64\v4 .0.30319\c sc.exe" /n oconfig /f ullpaths @ "C:\Users\ user\AppDa ta\Local\T emp\akylvh fm\akylvhf m.cmdline" MD5: F65B029562077B648A6A5F6A1AA76A66) cvtres.exe (PID: 6200 cmdline:
C:\Windows \Microsoft .NET\Frame work64\v4. 0.30319\cv tres.exe / NOLOGO /RE ADONLY /MA CHINE:IX86 "/OUT:C:\ Users\user \AppData\L ocal\Temp\ RESD89C.tm p" "c:\Use rs\user\Ap pData\Loca l\Temp\aky lvhfm\CSC1 5D32CA6BA7 24B45B0CB2 F57F81BE15 3.TMP" MD5: C877CBB966EA5939AA2A17B6A5160950) svchost.exe (PID: 2524 cmdline:
C:\Windows \system32\ svchost.ex e -k netsv cs -p -s W inmgmt MD5: B7F884C1B74A263F746EE12A5F7C9F6A) WMIADAP.exe (PID: 6200 cmdline:
wmiadap.ex e /F /T /R MD5: 1BFFABBD200C850E6346820E92B915DC) svchost.exe (PID: 3388 cmdline:
C:\Windows \System32\ svchost.ex e -k Local ServiceNoN etwork -p -s NcdAuto Setup MD5: B7F884C1B74A263F746EE12A5F7C9F6A) explorer.exe (PID: 3084 cmdline:
C:\Windows \Explorer. EXE MD5: 662F4F92FDE3557E86D110526BB578D5)
- cleanup
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
Quasar RAT, QuasarRAT | Quasar RAT is a malware family written in .NET which is used by a variety of attackers. The malware is fully functional and open source, and is often packed to make analysis of the source more difficult. |
⊘No configs have been found
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_PureLogStealer | Yara detected PureLog Stealer | Joe Security |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
Windows_Trojan_Donutloader_f40e3759 | unknown | unknown |
| |
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
MAL_QuasarRAT_May19_1 | Detects QuasarRAT malware | Florian Roth |
| |
MAL_BackNet_Nov18_1 | Detects BackNet samples | Florian Roth |
| |
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
Click to see the 7 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
MAL_QuasarRAT_May19_1 | Detects QuasarRAT malware | Florian Roth |
| |
MAL_BackNet_Nov18_1 | Detects BackNet samples | Florian Roth |
| |
Click to see the 8 entries |
System Summary |
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Source: | Author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems), Max Altgelt (Nextron Systems), Tim Shelton: |
Source: | Author: Roberto Rodriguez @Cyb3rWard0g: |