MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1b8733a553b25ca6338c13d25d938778f515f4c87229f3b632077c450c36ea98. 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: 10


Intelligence 10 IOCs YARA 12 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 1b8733a553b25ca6338c13d25d938778f515f4c87229f3b632077c450c36ea98
SHA3-384 hash: 660a22bd8f1eb951f1133189ee7e441ff4558def748f289e1b5d83c4859ca63e61db09ec4b700c3b6b97b33231918c0b
SHA1 hash: 2f93c1e73f9a5470903663ecf1212789f95c8227
MD5 hash: 623b957f20ce6053878bcc86fc8b073e
humanhash: bakerloo-freddie-seven-fillet
File name:SecuriteInfo.com.Trojan.PackedNET.726.12479.23271
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'795'072 bytes
First seen:2021-05-11 12:08:41 UTC
Last seen:2021-05-11 12:52:39 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'741 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 1536:vXDZwHrOtSNJqi9pNmVsGCA5QIzTHchUUCKFGicXQlKnUHBUppHxPcQE6ONU0NKR:b
Threatray 1'768 similar samples on MalwareBazaar
TLSH F2852030A7247A55B7E668F49C9E30C52787FBF663B1DA4C910A209C2F793265C72387
Reporter SecuriteInfoCom
Tags:RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
147
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/155072/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.726.12479.23271.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Running batch commands
Creating a process with a hidden window
Launching a process
Adding an access-denied ACE
Creating a file
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a window
Deleting a recently created file
DNS request
Connection attempt
Sending a UDP request
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/778587
Signature
.NET source code contains very large strings
C2 URLs / IPs found in malware configuration
Contains functionality to capture and log keystrokes
Contains functionality to hide a thread from the debugger
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
Found malware configuration
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 dropped file
Multi AV Scanner detection for submitted file
Sigma detected: WScript or CScript Dropper
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 410982 Sample: SecuriteInfo.com.Trojan.Pac... Startdate: 11/05/2021 Architecture: WINDOWS Score: 100 73 ghdyuienah123.freedynamicdns.org 2->73 79 Found malware configuration 2->79 81 Malicious sample detected (through community Yara rule) 2->81 83 Multi AV Scanner detection for submitted file 2->83 85 7 other signatures 2->85 12 SecuriteInfo.com.Trojan.PackedNET.726.12479.exe 3 2->12         started        15 win.exe 2->15         started        17 win.exe 2->17         started        signatures3 process4 signatures5 95 Contains functionality to steal Chrome passwords or cookies 12->95 97 Contains functionality to capture and log keystrokes 12->97 99 Contains functionality to inject code into remote processes 12->99 101 Contains functionality to steal Firefox passwords or cookies 12->101 19 SecuriteInfo.com.Trojan.PackedNET.726.12479.exe 4 4 12->19         started        22 cmd.exe 1 12->22         started        24 WerFault.exe 23 9 12->24         started        103 Hides threads from debuggers 15->103 105 Injects a PE file into a foreign processes 15->105 27 cmd.exe 15->27         started        29 win.exe 15->29         started        31 WerFault.exe 15->31         started        33 cmd.exe 17->33         started        process6 dnsIp7 67 C:\Users\user\AppData\Roaming\win.exe, PE32 19->67 dropped 69 C:\Users\user\...\win.exe:Zone.Identifier, ASCII 19->69 dropped 71 C:\Users\user\AppData\Local\...\install.vbs, data 19->71 dropped 35 wscript.exe 1 19->35         started        37 conhost.exe 22->37         started        39 timeout.exe 1 22->39         started        75 192.168.2.1 unknown unknown 24->75 41 conhost.exe 27->41         started        43 timeout.exe 27->43         started        45 conhost.exe 33->45         started        47 timeout.exe 33->47         started        file8 process9 process10 49 cmd.exe 35->49         started        process11 51 win.exe 49->51         started        54 conhost.exe 49->54         started        signatures12 87 Multi AV Scanner detection for dropped file 51->87 89 Machine Learning detection for dropped file 51->89 91 Hides threads from debuggers 51->91 93 Contains functionality to hide a thread from the debugger 51->93 56 win.exe 51->56         started        59 cmd.exe 51->59         started        61 WerFault.exe 51->61         started        process13 dnsIp14 77 ghdyuienah123.freedynamicdns.org 46.243.248.86, 2006 M247GB Netherlands 56->77 63 conhost.exe 59->63         started        65 timeout.exe 59->65         started        process15
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/1b8733a553b25ca6338c13d25d938778f515f4c87229f3b632077c450c36ea98/
Threat name:
ByteCode-MSIL.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2021-05-11 07:34:15 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
26 of 47 (55.32%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=dodthjktwjokmm4mcpjf3e4hpd2rl5gioiu7hnrsa56ekdbw5kma._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
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RemcosRAT
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4579780c18fb273fd0884237c7a4021dbbb38494194d8c1840449e8a62d29251
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833b575dac3a049ede0d27e2ff801d2e8d647cf04006f0037e1a9c71d7c8ace4
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ab9041fe7e0a4a439521d6eb01cc16d74c00a0427c86b067120ac453ba7329d9
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c39bdd8f7c69c3140ef920e2b1d5965310058c5fa425b871f4d7751d8291d55e
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cee5cdde8972799268ab97a77880793470dfc0d93c5e697bb66f83b6675f51ba
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e0d4ce0316734fce0ea0d950f0ff1b4182f1364d581c549a199ac041cfe68ebb
RemcosRAT
+ 1'758 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/210511-htw5x5sbyn/
Behaviour
Delays execution with timeout.exe
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Executes dropped EXE
Remcos
Malware Config
C2 Extraction:
ghdyuienah123.freedynamicdns.org:2006
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/1b8733a553b25ca6338c13d25d938778f515f4c87229f3b632077c450c36ea98

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:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
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:pe_imphash
Create hunting rule
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:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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 1b8733a553b25ca6338c13d25d938778f515f4c87229f3b632077c450c36ea98

(this sample)

Cape
Cape
https://www.capesandbox.com/analysis/155072/
  
URLhaus
https://urlhaus.abuse.ch/url/1220166/
  
Delivery method
Distributed via web download

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