MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ecf20ba9055ef6e87d3c8565f3eedf67f02b068c844056d7a5c1d60bb9e67e5b. 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


RevCodeRAT


Vendor detections: 9


Intelligence 9 IOCs YARA File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ecf20ba9055ef6e87d3c8565f3eedf67f02b068c844056d7a5c1d60bb9e67e5b
SHA3-384 hash: 3ecfdb47b0fefe6331bef30c8e8b88a65f5cb2abeaf1cc0256e15d8d2af670e52a2e8002b30b7140d172167665d52809
SHA1 hash: c1147f87babcf9c0ce3e278ded158c1343dc7e92
MD5 hash: 432494553bb7b05ce1970f180968aac3
humanhash: wolfram-alpha-berlin-seventeen
File name:IMAGE20210406_490133692.exe
Download: download sample
Signature RevCodeRAT
Create hunting rule
File size:1'646'080 bytes
First seen:2021-04-06 08:18:10 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'608 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 24576:MGBA7RKB51dQyIERUtABZQ1X9wisS6Wxy4d17zncDu5303LvLZEczXK7eXZTbXey:qKTjQyILjX9uSd13iwELvLmcosnu0m8
Threatray 264 similar samples on MalwareBazaar
TLSH EE7512232618CF89C07923F41531916047F3BE45EA36D22E7EB4364EEAF7B458D95B82
Reporter abuse_ch
Tags:exe geo KOR RevCodeRAT


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: mail-smail-vm49.hanmail.net
Sending IP: 203.133.180.237
From: Agro-composite glass <anong5701@daum.net>
Subject: 생산 요청
Attachment: IMAGE20210406_490133692.cab (contains "IMAGE20210406_490133692.exe")

Intelligence

File Origin
# of uploads :
1
# of downloads :
137
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
IMAGE20210406_490133692.exe
Verdict:
Malicious activity
Analysis date:
2021-04-06 04:13:38 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/b9d3b850-0f33-4423-b4d7-3053ecc95811

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/132622/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.WZA.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Result
Verdict:
SUSPICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
WebMonitor RAT
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/667347
Signature
Adds a directory exclusion to Windows Defender
Contain functionality to detect virtual machines
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Potentially malicious time measurement code found
Sigma detected: Scheduled temp file as task from temp location
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected WebMonitor RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 382605 Sample: IMAGE20210406_490133692.exe Startdate: 06/04/2021 Architecture: WINDOWS Score: 100 37 Multi AV Scanner detection for dropped file 2->37 39 Sigma detected: Scheduled temp file as task from temp location 2->39 41 Multi AV Scanner detection for submitted file 2->41 43 6 other signatures 2->43 7 IMAGE20210406_490133692.exe 7 2->7         started        process3 file4 29 C:\Users\user\AppData\Roaming\nTLvOJ.exe, PE32 7->29 dropped 31 C:\Users\user\...\nTLvOJ.exe:Zone.Identifier, ASCII 7->31 dropped 33 C:\Users\user\AppData\Local\...\tmp48C5.tmp, XML 7->33 dropped 35 C:\Users\...\IMAGE20210406_490133692.exe.log, ASCII 7->35 dropped 45 Contain functionality to detect virtual machines 7->45 47 Uses schtasks.exe or at.exe to add and modify task schedules 7->47 49 Adds a directory exclusion to Windows Defender 7->49 51 2 other signatures 7->51 11 powershell.exe 24 7->11         started        13 powershell.exe 26 7->13         started        15 schtasks.exe 1 7->15         started        17 2 other processes 7->17 signatures5 process6 process7 19 conhost.exe 11->19         started        21 conhost.exe 13->21         started        23 conhost.exe 15->23         started        25 conhost.exe 17->25         started        27 WerFault.exe 17->27         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ecf20ba9055ef6e87d3c8565f3eedf67f02b068c844056d7a5c1d60bb9e67e5b/
Threat name:
Win32.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-04-06 07:55:25 UTC
AV detection:
15 of 48 (31.25%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=5tzaxkifl33oq7j4qvs7h3w7m7ycwbumqrafnv5fyhlaxopgpznq._file
Verdict:
suspicious
Similar samples:
05c1f772142b914a5761ae612fdd21cb2a5a7c8560f05b4410858024f6f2acc2
RevCodeRAT
74b724569a5927bac6986864470763a88854802f63eb19571569da6276d542d2
RevCodeRAT
7db918fd5b12da70b9084a2d452d94b9d6e8daa64a91f233e22ed2ee13551777
RevCodeRAT
8cfafa2cbc8c24afe00f82ca7beef18000cd3ad1a2f45c97a0a6e1921df0c92f
RevCodeRAT
97ceecc6a795a50bfc6238ebe7222f87f77de9348ee7a3c32f2f27bcdf68be4f
RevCodeRAT
b69927fbfd7eb038b59aa9b7e9f49cb02d127d48fcf6517e65a379e982e806bc
RevCodeRAT
bf694824d6cbf6fba77ce087678b03ee8243a245b4b730eb55fb83e83b8dff8e
RevCodeRAT
c6001e599745f9e8b432fcfdcb2d5001d1b2c56871db82ecea6882e2d48cd67f
RevCodeRAT
c9e605adb000dd5d2aa5dcd298c1b345d3ffec9d1db3adc40d18f149c4388bab
RevCodeRAT
db2bb3876a40bbde8eeb7416ffeba8daa35bc6cc4af24fcb440cc57effe904fa
RevCodeRAT
+ 254 additional samples on MalwareBazaar
Result
Malware family:
webmonitor
Create hunting rule
Score:
  10/10
Tags:
family:webmonitor backdoor infostealer persistence rat
Link:
https://tria.ge/reports/210406-g4593xal3e/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: RenamesItself
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
RevcodeRat, WebMonitorRat
Unpacked files
SH256 hash:
6590b9ec4fa84e44c372fda26f47d6d58859d74869621c6bdd4086e6ae411379
MD5 hash:
95dfa1a9015a17a1d49b4faa3f3d999d
SHA1 hash:
427b72727b28436554d0443d797f19b2ea37cc16
Link:
https://www.unpac.me/results/c15b0f61-1a0f-489d-8a9f-2f671cb06dcf/
SH256 hash:
ecf20ba9055ef6e87d3c8565f3eedf67f02b068c844056d7a5c1d60bb9e67e5b
MD5 hash:
432494553bb7b05ce1970f180968aac3
SHA1 hash:
c1147f87babcf9c0ce3e278ded158c1343dc7e92
Link:
https://www.unpac.me/results/c15b0f61-1a0f-489d-8a9f-2f671cb06dcf/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
AgentTesla
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/ecf20ba9055ef6e87d3c8565f3eedf67f02b068c844056d7a5c1d60bb9e67e5b

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

RevCodeRAT

cab 19fddcec9add9da51ecd1e3662e55f8c8ddf9973a8babb6ecfc1df8a02c63afa

RevCodeRAT

Executable exe ecf20ba9055ef6e87d3c8565f3eedf67f02b068c844056d7a5c1d60bb9e67e5b

(this sample)

  
Dropped by
MD5 730903458642e948f4a02142ae0981b2
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/132622/
  
Dropped by
SHA256 19fddcec9add9da51ecd1e3662e55f8c8ddf9973a8babb6ecfc1df8a02c63afa

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