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Analysis Report RFL_PO 69002.doc
Overview
General Information
| Sample Name: | RFL_PO 69002.doc |
| Analysis ID: | 433026 |
| MD5: | ee4431e2c986dcac3fc8078c674ba65e |
| SHA1: | 64aa75122963e38f52739ba819788e4bfcfb3651 |
| SHA256: | 4219dd0fbae4f8d9e9964eac82293fefc6a7f1b75242473f6347daed349198a2 |
| Tags: | doc |
| Infos: | |
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Most interesting Screenshot:  |
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Detection
FormBook
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Yara detected FormBook
C2 URLs / IPs found in malware configuration
Document contains an embedded VBA macro which may execute processes
Document contains an embedded VBA macro with suspicious strings
Document exploit detected (process start blacklist hit)
Machine Learning detection for dropped file
Machine Learning detection for sample
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Sigma detected: Execution from Suspicious Folder
Sigma detected: Microsoft Office Product Spawning Windows Shell
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected Costura Assembly Loader
Abnormal high CPU Usage
Allocates a big amount of memory (probably used for heap spraying)
Antivirus or Machine Learning detection for unpacked file
Binary contains a suspicious time stamp
Checks if the current process is being debugged
Contains capabilities to detect virtual machines
Contains functionality for execution timing, often used to detect debuggers
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality to call native functions
Contains functionality to read the PEB
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected potential crypto function
Document contains an embedded VBA macro which executes code when the document is opened / closed
Document contains embedded VBA macros
Downloads executable code via HTTP
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 inlined nop instructions (likely shell or obfuscated code)
Found potential string decryption / allocating functions
Internet Provider seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
Potential document exploit detected (performs HTTP gets)
Potential document exploit detected (unknown TCP traffic)
Queries the volume information (name, serial number etc) of a device
Sigma detected: Non Interactive PowerShell
Sigma detected: Suspicious Bitsadmin Job via PowerShell
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
AV Detection: |
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| Found malware configuration |
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| Multi AV Scanner detection for dropped file |
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Metadefender: |
Perma Link | ||
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ReversingLabs: |
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| Multi AV Scanner detection for submitted file |
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Virustotal: |
Perma Link | ||
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| Yara detected FormBook |
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| Machine Learning detection for dropped file |
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| Machine Learning detection for sample |
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| Antivirus or Machine Learning detection for unpacked file |
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File opened: |
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Software Vulnerabilities: |
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| Document exploit detected (process start blacklist hit) |
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Process created: |
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| Allocates a big amount of memory (probably used for heap spraying) |
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Memory has grown: |
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| Found inlined nop instructions (likely shell or obfuscated code) |
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Code function: |
9_2_03021500 | |
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Code function: |
28_2_004172E4 | |
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Code function: |
28_2_00417D55 | |
| Potential document exploit detected (performs HTTP gets) |
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TCP traffic: |
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| Potential document exploit detected (unknown TCP traffic) |
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| C2 URLs / IPs found in malware configuration |
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| Downloads executable code via HTTP |
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