MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 e661bc38b20992b846232fd3d6cbe914bb46ae68b39ce7e7a348be2ba5261851. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.
Database Entry
Neurevt
Vendor detections: 8
| SHA256 hash: | e661bc38b20992b846232fd3d6cbe914bb46ae68b39ce7e7a348be2ba5261851 |
|---|---|
| SHA3-384 hash: | 10d886248c54411e23fe1580df8c20f86b6b5f09180be7f3413a3fe5ee9fc2ba19e798eefb6ce2d848a2d19582ac8d16 |
| SHA1 hash: | 734cc56f3751a0f0beabbc07f8fbe8fc283a673d |
| MD5 hash: | ac33028112d71a5e86f61cb8e7a1be3c |
| humanhash: | montana-lima-berlin-purple |
| File name: | me.exe |
| Download: | download sample |
| Signature | Neurevt |
| File size: | 551'107 bytes |
| First seen: | 2020-08-28 06:18:13 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 24f4223e271413c25abad52fd456a9bc (21 x GuLoader, 15 x Loki, 10 x AgentTesla) |
| ssdeep | 12288:WtsAawuKMDfmgFprzhj6Ky+Ntgv4o9RufsBisx8z:WtsAwFHj6KU+mx8z |
| Threatray | 632 similar samples on MalwareBazaar |
| TLSH | D2C42304BB72E036DE24D475600B9A367EF2BF469960BF0F47642E38FAB41A6520D35D |
| Reporter |  abuse_ch |
| Tags: | exe Neurevt |
abuse_ch
Malspam distributing Neurevt:HELO: hwaidakhotels.com
Sending IP: 192.232.192.173
From: Brittany <karuppiah.kathiresan@gelind.co.in>
Subject: Fw: Provide Proforma Invoice
Attachment: New-order808AUG-SEP.xlsx
Neurevt payload URL:
http://brascase-br.com/~zadmin/div/me.exe
Neurevt C2:
http://brascase-br.com/~zadmin/lk/ndd/logout.php
Intelligence
File Origin
# of uploads :
1
# of downloads :
91
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a file in the %temp% directory
Creating a file in the %AppData% subdirectories
Creating a file
Launching a process
Sending a UDP request
Adding an access-denied ACE
Moving a system file
Creating a window
Unauthorized injection to a browser process
DNS request
Connection attempt
Sending an HTTP POST request
Changing a file
Forced shutdown of a system process
Enabling autorun for a service
Firewall traversal
Setting a single autorun event
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Changing settings of the browser security zones
Unauthorized injection to a system process
Enabling autorun
Result
Threat name:
Betabot
Detection:
malicious
Classification:
phis.troj.evad
Score:
100 / 100
Signature
Antivirus / Scanner detection for submitted sample
Contains functionality to create processes via WMI
Creates an undocumented autostart registry key
Hides that the sample has been downloaded from the Internet (zone.identifier)
Hides threads from debuggers
Hijacks the control flow in another process
Machine Learning detection for sample
Maps a DLL or memory area into another process
Modifies Internet Explorer zone settings
Multi AV Scanner detection for dropped file
Overwrites code with unconditional jumps - possibly settings hooks in foreign process
Overwrites Windows DLL code with PUSH RET codes
Sample uses process hollowing technique
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect sandboxes and other dynamic analysis tools (window names)
Writes to foreign memory regions
Yara detected Betabot
Behaviour
Behavior Graph:
Threat name:
Win32.Backdoor.Remcos
Status:
Malicious
First seen:
2020-08-28 06:20:07 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Similar samples:
+ 622 additional samples on MalwareBazaar
Result
Malware family:
betabot
Score:
10/10
Tags:
evasion trojan backdoor botnet family:betabot persistence
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of NtSetInformationThreadHideFromDebugger
Adds Run key to start application
Checks whether UAC is enabled
Drops desktop.ini file(s)
Checks BIOS information in registry
Loads dropped DLL
Sets file execution options in registry
BetaBot
Modifies firewall policy service
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
YARA Signatures
MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.
| Rule name: | win_betabot_auto |
|---|---|
| Author: | Felix Bilstein - yara-signator at cocacoding dot com |
| Description: | autogenerated rule brought to you by yara-signator |
| Rule name: | win_betabot_g0 |
|---|---|
| Author: | Slavo Greminger, SWITCH-CERT |
| Rule name: | win_betabot_w0 |
|---|---|
| Author: | Venom23 |
| Description: | Neurevt Malware Sig |
| Rule name: | win_nymaim_g0 |
|---|---|
| Author: | mak, msm, CERT.pl |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
xlsx Delivery method
Distributed via web download
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