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Windows
Analysis Report
file.exe
Overview
General Information
| Sample name: | file.exe |
| Analysis ID: | 1565534 |
| MD5: | 9d2eed099096486e2ae388b2b220497c |
| SHA1: | c84457bca7db83641fd56925c6496b4c9a8c6c5b |
| SHA256: | 5d5a9d7c44e0dbd125b577319dcad5274121c38b6cde03658eb83c49e316d307 |
| Tags: | exeuser-Bitsight |
| Infos: |  |
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Detection
Nymaim
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Detected unpacking (changes PE section rights)
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Yara detected Nymaim
AI detected suspicious sample
C2 URLs / IPs found in malware configuration
Hides threads from debuggers
Machine Learning detection for dropped file
Machine Learning detection for sample
PE file contains section with special chars
Tries to detect process monitoring tools (Task Manager, Process Explorer etc.)
Tries to detect sandboxes / dynamic malware analysis system (registry check)
Tries to detect sandboxes and other dynamic analysis tools (window names)
Tries to detect virtualization through RDTSC time measurements
Tries to evade debugger and weak emulator (self modifying code)
AV process strings found (often used to terminate AV products)
Binary contains a suspicious time stamp
Checks for debuggers (devices)
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 check if a debugger is running (IsDebuggerPresent)
Contains functionality to check if a debugger is running (OutputDebugString,GetLastError)
Contains functionality to query CPU information (cpuid)
Contains functionality to read the PEB
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Detected potential crypto function
Downloads executable code via HTTP
Dropped file seen in connection with other malware
Drops PE files
Drops files with a non-matching file extension (content does not match file extension)
Entry point lies outside standard sections
Found dropped PE file which has not been started or loaded
Found potential string decryption / allocating functions
IP address seen in connection with other malware
Internet Provider seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
One or more processes crash
PE file contains an invalid checksum
PE file contains sections with non-standard names
Queries the volume information (name, serial number etc) of a device
Sample file is different than original file name gathered from version info
Uses 32bit PE files
Uses Microsoft's Enhanced Cryptographic Provider
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
- System is w10x64
file.exe (PID: 4708 cmdline: "C:\Users\ user\Deskt op\file.ex e" MD5: 9D2EED099096486E2AE388B2B220497C) 
WerFault.exe (PID: 7496 cmdline: C:\Windows \SysWOW64\ WerFault.e xe -u -p 4 708 -s 644 MD5: C31336C1EFC2CCB44B4326EA793040F2)
- cleanup
| Name | Description | Attribution | Blogpost URLs | Link |
|---|---|---|---|---|
| Nymaim | Nymaim is a trojan downloader. It downloads (and runs) other malware on affected systems and was one of the primary malware families hosted on Avalanche. Nymaim is different in that it displays a localized lockscreen while it downloads additional malware. Nymaim is usually delivered by exploit kits and malvertising. | No Attribution |
{"C2 addresses": ["185.156.72.65", "185.156.72.65", "185.156.72.65", "185.156.72.65"]}| Source | Rule | Description | Author | Strings |
|---|---|---|---|---|
| Windows_Trojan_RedLineStealer_ed346e4c | unknown | unknown |
| |
| JoeSecurity_Nymaim | Yara detected Nymaim | Joe Security | ||
| JoeSecurity_Nymaim | Yara detected Nymaim | Joe Security | ||
| JoeSecurity_Nymaim | Yara detected Nymaim | Joe Security | ||
| Windows_Trojan_Smokeloader_3687686f | unknown | unknown |
|
| Source | Rule | Description | Author | Strings |
|---|---|---|---|---|
| JoeSecurity_Nymaim | Yara detected Nymaim | Joe Security | ||
| JoeSecurity_Nymaim | Yara detected Nymaim | Joe Security | ||
| JoeSecurity_Nymaim | Yara detected Nymaim | Joe Security | ||
| JoeSecurity_Nymaim | Yara detected Nymaim | Joe Security |
⊘No Sigma rule has matched
⊘No Suricata rule has matched
Click to jump to signature section
Show All Signature Results
AV Detection |   |
|---|
| Source: | Malware Configuration Extractor: | ||
| Source: | ReversingLabs: | ||
| Source: | ReversingLabs: | ||
| Source: | ReversingLabs: | ||
| Source: | Integrated Neural Analysis Model: | ||
| Source: | Joe Sandbox ML: | ||
| Source: | Joe Sandbox ML: | ||
| Source: | Joe Sandbox ML: | ||
| Source: | Code function: | 1_2_004035D0 | |
| Source: | Code function: | 1_2_04933837 | |
| Source: | Static PE information: | ||
| Source: | File opened: | Jump to behavior | ||
| Source: | Code function: | 1_2_00417727 | |
| Source: | Code function: | 1_2_10007EA9 | |
| Source: | Code function: | 1_2_0494798E | |
Networking | |
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| Source: | IPs: | ||
| Source: | IPs: | ||
| Source: | IPs: | ||
| Source: | IPs: | ||
| Source: | HTTP traffic detected: | ||