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Windows
Analysis Report
PEDIDO DE COMPRAS OC 1203 CRI234.xlsx.exe
Overview
General Information
Detection
AsyncRAT, PureLog Stealer
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 dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Scheduled temp file as task from temp location
Sigma detected: Suspicious Double Extension File Execution
Suricata IDS alerts for network traffic
Yara detected AntiVM3
Yara detected AsyncRAT
Yara detected PureLog Stealer
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
AI detected suspicious sample
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Injects a PE file into a foreign processes
Loading BitLocker PowerShell Module
Machine Learning detection for dropped file
Machine Learning detection for sample
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses an obfuscated file name to hide its real file extension (double extension)
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)
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Creates processes with suspicious names
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)
Internet Provider seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
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: Powershell Defender Exclusion
Sigma detected: Suspicious Add Scheduled Task Parent
Sigma detected: Suspicious Schtasks From Env Var Folder
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
- System is w10x64
- PEDIDO DE COMPRAS OC 1203 CRI234.xlsx.exe (PID: 5308 cmdline:
"C:\Users\ user\Deskt op\PEDIDO DE COMPRAS OC 1203 C RI234.xlsx .exe" MD5: 934331EDA0B472009322A97523B5BFDD) - powershell.exe (PID: 764 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" Add-MpPref erence -Ex clusionPat h "C:\User s\user\App Data\Roami ng\DpmrYee DGcj.exe" MD5: C32CA4ACFCC635EC1EA6ED8A34DF5FAC) - conhost.exe (PID: 2088 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - WmiPrvSE.exe (PID: 6888 cmdline:
C:\Windows \system32\ wbem\wmipr vse.exe -s ecured -Em bedding MD5: 60FF40CFD7FB8FE41EE4FE9AE5FE1C51) - schtasks.exe (PID: 3508 cmdline:
"C:\Window s\System32 \schtasks. exe" /Crea te /TN "Up dates\Dpmr YeeDGcj" / XML "C:\Us ers\user\A ppData\Loc al\Temp\tm pED50.tmp" MD5: 48C2FE20575769DE916F48EF0676A965) - conhost.exe (PID: 6560 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - vbc.exe (PID: 5484 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\vbc .exe" MD5: 0A7608DB01CAE07792CEA95E792AA866)
- DpmrYeeDGcj.exe (PID: 4136 cmdline:
C:\Users\u ser\AppDat a\Roaming\ DpmrYeeDGc j.exe MD5: 934331EDA0B472009322A97523B5BFDD) - schtasks.exe (PID: 3428 cmdline:
"C:\Window s\System32 \schtasks. exe" /Crea te /TN "Up dates\Dpmr YeeDGcj" / XML "C:\Us ers\user\A ppData\Loc al\Temp\tm pA9.tmp" MD5: 48C2FE20575769DE916F48EF0676A965) - conhost.exe (PID: 6844 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - vbc.exe (PID: 5624 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\vbc .exe" MD5: 0A7608DB01CAE07792CEA95E792AA866)
- 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 |
{"Server": "ergsea.ydns.eu", "Port": "7393", "Version": "0.5.8", "MutexName": "0Yn3xzTdlCbn", "Autorun": "false", "Group": "null"}
Source | Rule | Description | Author | Strings |
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JoeSecurity_PureLogStealer | Yara detected PureLog Stealer | Joe Security | ||
JoeSecurity_AsyncRAT | Yara detected AsyncRAT | Joe Security | ||
INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse | Detects file containing reversed ASEP Autorun registry keys | ditekSHen |
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JoeSecurity_PureLogStealer | Yara detected PureLog Stealer | Joe Security | ||
JoeSecurity_PureLogStealer | Yara detected PureLog Stealer | Joe Security | ||
Click to see the 14 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 |
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JoeSecurity_AsyncRAT | Yara detected AsyncRAT | Joe Security | ||
Click to see the 38 entries |
System Summary |
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Source: | Author: Florian Roth (Nextron Systems), @blu3_team (idea), Nasreddine Bencherchali (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Roberto Rodriguez @Cyb3rWard0g (rule), oscd.community (improvements): |
Persistence and Installation Behavior |
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Source: | Author: Joe Security: |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-01-08T12:30:40.757332+0100 | 2035595 | 1 | Domain Observed Used for C2 Detected | 67.203.7.171 | 7393 | 192.168.2.8 | 49712 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-01-08T12:30:40.757332+0100 | 2035607 | 1 | Domain Observed Used for C2 Detected | 67.203.7.171 | 7393 | 192.168.2.8 | 49712 | TCP |
Click to jump to signature section
Show All Signature Results
AV Detection |
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System Summary |
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Source: | Code function: | 0_2_030CD88C | |
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Source: | Code function: | 0_2_07A049B0 | |
Source: | Code function: | 0_2_07A06958 | |
Source: | Code function: | 7_2_00D665C0 | |
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Source: | Code function: | 7_2_00D659A8 | |
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Source: | Code function: | 9_2_025AD88C | |
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