MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b20763ef2da523cc3f4dba41af4d4248bae939b8834c5a746bbff398431989d0. 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


RemcosRAT


Vendor detections: 11


Intelligence 11 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b20763ef2da523cc3f4dba41af4d4248bae939b8834c5a746bbff398431989d0
SHA3-384 hash: 656183937d647d1bff1aced869bf2251fee8f32e2d4457763255dd39d785bb68839faad6ba6adff750fbd7d9312e3eb1
SHA1 hash: d072bac24e5e674fb1de979c72dd90c67f3521a7
MD5 hash: 6aa2322441883ae8dce5403dc0de0c83
humanhash: hot-idaho-diet-romeo
File name:6aa2322441883ae8dce5403dc0de0c83.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'975'456 bytes
First seen:2020-12-19 12:42:47 UTC
Last seen:2020-12-19 14:33:53 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:Fwk8aMp3MhP2a6bScdBkkg/Dscie16ozdt0TNrT/UvjUUVmlxh:Hvh+zSvV/DszpcwUw5
Threatray 1'249 similar samples on MalwareBazaar
TLSH A2956C54F850355F7A8A40F09EDB56E8E2D6301925721B3A8C2369BCDA1E14B7CEF873
Reporter abuse_ch
Tags:exe RAT RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
234
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
6aa2322441883ae8dce5403dc0de0c83.exe
Verdict:
Malicious activity
Analysis date:
2020-12-19 12:49:23 UTC
Tags:
rat remcos keylogger
Link:
https://app.any.run/tasks/7a07fa45-f4b7-4604-9104-fab7d88aad3d

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/108550/
Detection(s):
SecuriteInfo.com.Artemis6AA232244188.2787.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Adding an access-denied ACE
Sending a UDP request
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Creating a file in the %temp% directory
Launching the default Windows debugger (dwwin.exe)
Creating a process from a recently created file
Creating a process with a hidden window
Deleting a recently created file
Running batch commands
DNS request
Creating a file
Connection attempt
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process by context flags manipulation
Setting a global event handler for the keyboard
Result
Verdict:
UNKNOWN
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:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/566787
Signature
Contains functionality to capture and log keystrokes
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Country aware sample found (crashes after keyboard check)
Detected Remcos RAT
Hides threads from debuggers
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Sigma detected: Remcos
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 332477 Sample: xa5dKwRnfh.exe Startdate: 19/12/2020 Architecture: WINDOWS Score: 100 54 Multi AV Scanner detection for domain / URL 2->54 56 Malicious sample detected (through community Yara rule) 2->56 58 Detected Remcos RAT 2->58 60 4 other signatures 2->60 10 xa5dKwRnfh.exe 2 2->10         started        13 vlc.exe 2 2->13         started        15 vlc.exe 2 2->15         started        process3 signatures4 62 Contains functionality to steal Chrome passwords or cookies 10->62 64 Contains functionality to capture and log keystrokes 10->64 66 Contains functionality to inject code into remote processes 10->66 68 Contains functionality to steal Firefox passwords or cookies 10->68 17 xa5dKwRnfh.exe 4 4 10->17         started        21 WerFault.exe 23 9 10->21         started        23 xa5dKwRnfh.exe 10->23         started        25 xa5dKwRnfh.exe 10->25         started        70 Hides threads from debuggers 13->70 72 Injects a PE file into a foreign processes 13->72 process5 dnsIp6 50 192.168.2.1 unknown unknown 17->50 42 C:\Users\user\AppData\Roaming\vlc.exe, PE32 17->42 dropped 44 C:\Users\user\...\vlc.exe:Zone.Identifier, ASCII 17->44 dropped 27 wscript.exe 1 17->27         started        46 C:\ProgramData\Microsoft\...\Report.wer, Little-endian 21->46 dropped file7 process8 process9 29 cmd.exe 1 27->29         started        process10 31 vlc.exe 2 29->31         started        34 conhost.exe 29->34         started        signatures11 74 Machine Learning detection for dropped file 31->74 76 Contains functionality to steal Chrome passwords or cookies 31->76 78 Contains functionality to capture and log keystrokes 31->78 80 2 other signatures 31->80 36 WerFault.exe 17 9 31->36         started        39 vlc.exe 2 1 31->39         started        process12 dnsIp13 48 C:\ProgramData\Microsoft\...\Report.wer, Little-endian 36->48 dropped 52 swryijgrvcsgkopnmcdertvgdswbvmophtfdczxs.ydns.eu 192.253.246.143, 2017 LEASEWEB-USA-NYC-11US United States 39->52 file14
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b20763ef2da523cc3f4dba41af4d4248bae939b8834c5a746bbff398431989d0/
Threat name:
ByteCode-MSIL.Packed.Generic
Create hunting rule
Status:
Suspicious
First seen:
2020-12-19 12:43:07 UTC
AV detection:
10 of 29 (34.48%)
Threat level:
  1/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=widwh3znuur4yp2nxja26tkcjc5osonyqngfu5dlx7zzqqyzrhia._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
4791861118e0be776fd14153e2feca7d25f5a91a6c32a997385f5ae272e3d7c8
RemcosRAT
4a94b062dbb9df940520146d100df5b019795d0f508d7ba89d24eb18725e1608
RemcosRAT
54c9967a2b3467f1a5961630d0bd429400e781de19866a383267c40e0f9acf2f
RemcosRAT
5b10f4a23880b51923a0df3e9e3c37f40eb0d3cc93de7b463da62f936a501385
RemcosRAT
843326e8aabda8025975ae55e6d36fcd8bb79e2e1a5f25e86303b82f16c3bac5
RemcosRAT
b8bcf3a59b89b2ebc0fb7cfba5f8f726de83b08acd072b55c557cf89d16210c9
RemcosRAT
c14895a7d0ca2633b565af7c08e77aef32397f4fdc78fd3560d2f23d89aa6d6a
RemcosRAT
e1865abf21c3b8f3b3d15e6c6e477468941f9e65700ceaaa0f4cb269d967c83e
RemcosRAT
f6c8f18b6a8db8307ea07c171236d118f91924e497027eeb305800ba2eee4fbe
RemcosRAT
f7e29cbf47c9804eb341836873ea6837be7a46639978f44d9ba2670d47e68d56
RemcosRAT
+ 1'239 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/201219-vymvsmxyaj/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious behavior: GetForegroundWindowSpam
Program crash
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Executes dropped EXE
ServiceHost packer
Remcos
Malware Config
C2 Extraction:
swryijgrvcsgkopnmcdertvgdswbvmophtfdczxs.ydns.eu:2017
Unpacked files
SH256 hash:
b20763ef2da523cc3f4dba41af4d4248bae939b8834c5a746bbff398431989d0
MD5 hash:
6aa2322441883ae8dce5403dc0de0c83
SHA1 hash:
d072bac24e5e674fb1de979c72dd90c67f3521a7
Link:
https://www.unpac.me/results/91f60af8-4b7f-48c5-bd00-dee6c8c18bdd/
SH256 hash:
fb1fe44f76bd9899e11ed3cac1935ee9cecc4da8261b117a622885da2d8fe925
MD5 hash:
3c043d6b7914a2fef39cf101996a6e3f
SHA1 hash:
1ee909d8047e77040b0e0251ee7ddfea38b9159c
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/91f60af8-4b7f-48c5-bd00-dee6c8c18bdd/
SH256 hash:
4972d30ec839d384ec3d6f56c9e824ea4785684ce47b2b48ad15f384c8d29d21
MD5 hash:
d445e73a52699e3df29b815e4e71933b
SHA1 hash:
e5892534a02318239169f69745d9a907fa55fff0
Link:
https://www.unpac.me/results/91f60af8-4b7f-48c5-bd00-dee6c8c18bdd/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.37
Link:
https://yomi.yoroi.company/submissions/b20763ef2da523cc3f4dba41af4d4248bae939b8834c5a746bbff398431989d0

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:ach_RemcosRAT
Create hunting rule
Author:abuse.ch
Rule name:Chrome_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Chrome in files like avemaria
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:Keylog_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Contains Keylog
Rule name:Parallax
Create hunting rule
Author:@bartblaze
Description:Identifies Parallax RAT.
Rule name:Remcos
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Remcos in memory
Rule name:remcos_rat
Create hunting rule
Author:jeFF0Falltrades
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator

File information

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

Web download

RemcosRAT

Executable exe b20763ef2da523cc3f4dba41af4d4248bae939b8834c5a746bbff398431989d0

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/929851/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/108550/

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