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Windows
Analysis Report
02107799.exe
Overview
General Information
| Sample Name: | 02107799.exe |
| Analysis ID: | 877000 |
| MD5: | 6017e7c6f19de9e3b0aae0965fe25603 |
| SHA1: | 605250b6dabafb86252272b757a1713078c6ae79 |
| SHA256: | c421418b410ea4bf78ef47c8edb75c8fc96220043573ba6d8268bca900a4c041 |
| Infos: |  |
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Detection
Amadey, Babuk, Clipboard Hijacker, Djvu, SmokeLoader, Vidar
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Yara detected Amadeys stealer DLL
Detected unpacking (overwrites its own PE header)
Found ransom note / readme
Yara detected Babuk Ransomware
Yara detected SmokeLoader
Yara detected Amadey bot
System process connects to network (likely due to code injection or exploit)
Detected unpacking (changes PE section rights)
Antivirus detection for URL or domain
Antivirus detection for dropped file
Yara detected Clipboard Hijacker
Found malware configuration
Multi AV Scanner detection for submitted file
Benign windows process drops PE files
Malicious sample detected (through community Yara rule)
Yara detected Djvu Ransomware
Yara detected Vidar stealer
Multi AV Scanner detection for dropped file
Maps a DLL or memory area into another process
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Machine Learning detection for sample
Modifies existing user documents (likely ransomware behavior)
Injects a PE file into a foreign processes
Deletes itself after installation
Writes a notice file (html or txt) to demand a ransom
Creates a thread in another existing process (thread injection)
Hides that the sample has been downloaded from the Internet (zone.identifier)
Sample uses string decryption to hide its real strings
Uses schtasks.exe or at.exe to add and modify task schedules
Checks if the current machine is a virtual machine (disk enumeration)
Tries to harvest and steal browser information (history, passwords, etc)
Sample uses process hollowing technique
Tries to harvest and steal ftp login credentials
Checks for kernel code integrity (NtQuerySystemInformation(CodeIntegrityInformation))
Creates an undocumented autostart registry key
Machine Learning detection for dropped file
C2 URLs / IPs found in malware configuration
Tries to steal Instant Messenger accounts or passwords
One or more processes crash
Contains functionality to query locales information (e.g. system language)
May sleep (evasive loops) to hinder dynamic analysis
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Uses code obfuscation techniques (call, push, ret)
Detected potential crypto function
Sample execution stops while process was sleeping (likely an evasion)
Contains functionality to dynamically determine API calls
Contains long sleeps (>= 3 min)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Drops files with a non-matching file extension (content does not match file extension)
Drops PE files
Contains functionality to read the PEB
Checks if the current process is being debugged
PE file contains more sections than normal
Dropped file seen in connection with other malware
Creates a process in suspended mode (likely to inject code)
Uses 32bit PE files
Queries the volume information (name, serial number etc) of a device
Yara signature match
Contains functionality to check if a debugger is running (IsDebuggerPresent)
PE file contains sections with non-standard names
Found potential string decryption / allocating functions
Yara detected Credential Stealer
Contains functionality to call native functions
Found dropped PE file which has not been started or loaded
PE file contains executable resources (Code or Archives)
IP address seen in connection with other malware
Contains functionality for execution timing, often used to detect debuggers
Creates a DirectInput object (often for capturing keystrokes)
PE file contains an invalid checksum
Uses cacls to modify the permissions of files
Connects to several IPs in different countries
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Classification
| Name | Description | Attribution | Blogpost URLs | Link |
|---|---|---|---|---|
| Amadey | Amadey is a botnet that appeared around October 2018 and is being sold for about $500 on Russian-speaking hacking forums. It periodically sends information about the system and installed AV software to its C2 server and polls to receive orders from it. Its main functionality is that it can load other payloads (called "tasks") for all or specifically targeted computers compromised by the malware. | No Attribution |
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| Name | Description | Attribution | Blogpost URLs | Link |
|---|---|---|---|---|
| Babuk | Babuk Ransomware is a sophisticated ransomware compiled for several platforms. Windows and ARM for Linux are the most used compiled versions, but ESX and a 32bit old PE executable were observed over time. as well It uses an Elliptic Curve Algorithm (Montgomery Algorithm) to build the encryption keys. | No Attribution |
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| Name | Description | Attribution | Blogpost URLs | Link |
|---|---|---|---|---|
| STOP, Djvu | STOP Djvu Ransomware it is a ransomware which encrypts user data through AES-256 and adds one of the dozen available extensions as marker to the encrypted file's name. It is not used to encrypt the entire file but only the first 5 MB. In its original version it was able to run offline and, in that case, it used a hard-coded key which could be extracted to decrypt files. | No Attribution |
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| Name | Description | Attribution | Blogpost URLs | Link |
|---|---|---|---|---|
| SmokeLoader | The SmokeLoader family is a generic backdoor with a range of capabilities which depend on the modules included in any given build of the malware. The malware is delivered in a variety of ways and is broadly associated with criminal activity. The malware frequently tries to hide its C2 activity by generating requests to legitimate sites such as microsoft.com, bing.com, adobe.com, and others. Typically the actual Download returns an HTTP 404 but still contains data in the Response Body. |
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| Name | Description | Attribution | Blogpost URLs | Link |
|---|---|---|---|---|
| Vidar | Vidar is a forked malware based on Arkei. It seems this stealer is one of the first that is grabbing information on 2FA Software and Tor Browser. | No Attribution |
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