MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b. 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: 15


Intelligence 15 IOCs YARA 34 File information Comments
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SHA256 hash: 230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b
SHA3-384 hash: c9e629e73cb8c4f654e2d6a6f6d862a31cb6e57fbdda1398b5f8d2c691ec237ff9670776dee219b567943f58ec600ed2
SHA1 hash: 01a2a60c6ef3ed356172acd97a050600d38ecf74
MD5 hash: 983f094cf97faca11916d717b22b64ca
humanhash: don-stairway-river-nevada
File name:htm.exe
Download: download sample
Signature RemcosRAT
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File size:838'656 bytes
First seen:2024-05-09 09:20:21 UTC
Last seen:2024-05-09 10:31:59 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 193dcc23f0c4b3eebcdd62c20466f1b9 (3 x RemcosRAT)
ssdeep 24576:JfnYNSoeuTPZAX/LZNVgJEEEEEEEEEEEEEEEEEEEE:JMu+EEEEEEEEEEEEEEEEEEEE
TLSH T14A056C22A390883AD03112370F0E6FF4542F7E52297478865AEA5D4FCEF9B5DE826357
TrID 28.3% (.SCR) Windows screen saver (13097/50/3)
22.7% (.EXE) Win64 Executable (generic) (10523/12/4)
21.6% (.EXE) DOS Borland compiled Executable (generic) (10000/1/2)
9.7% (.EXE) Win32 Executable (generic) (4504/4/1)
4.4% (.EXE) Win16/32 Executable Delphi generic (2072/23)
File icon (PE):PE icon
dhash icon f8b2f4c4d4d4ccd4 (3 x RemcosRAT)
Reporter pr0xylife
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
360
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
remcos
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ID:
1
File name:
230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b.exe
Verdict:
Malicious activity
Analysis date:
2024-05-09 09:23:33 UTC
Tags:
fileshare rat remcos keylogger evasion stealer
Link:
https://app.any.run/tasks/a19b1fe2-d5fd-4207-b648-348475b5cb17

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
MiscreantPunch.SingleXOR.EXE.128.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a window
DNS request
Connection attempt
Sending a custom TCP request
Launching a process
Creating a process with a hidden window
Creating a file
Searching for the window
Setting a keyboard event handler
Sending an HTTP GET request
Unauthorized injection to a recently created process
Restart of the analyzed sample
Reading critical registry keys
Creating a file in the %temp% directory
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Stealing user critical data
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-vm fingerprint keylogger lolbin obfuscated shell32
Link:
https://www.filescan.io/uploads/663c958254aa07c307f1cfc1/reports/b06825b8-d5c3-4c41-974d-5e1d59df83d4/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/b7fcf96f-f5ac-491e-a801-e4ab3d6fc09b
Result
Threat name:
Remcos, DBatLoader, PrivateLoader
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Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1438841
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to inject code into remote processes
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Delayed program exit found
Detected Remcos RAT
Drops PE files with a suspicious file extension
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Found malware configuration
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Execution from Suspicious Folder
Sigma detected: New RUN Key Pointing to Suspicious Folder
Sigma detected: Remcos
Snort IDS alert for network traffic
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Tries to steal Mail credentials (via file registry)
Uses dynamic DNS services
Yara detected DBatLoader
Yara detected PrivateLoader
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1438841 Sample: htm.exe Startdate: 09/05/2024 Architecture: WINDOWS Score: 100 34 trutru.duckdns.org 2->34 36 web.fe.1drv.com 2->36 38 6 other IPs or domains 2->38 54 Snort IDS alert for network traffic 2->54 56 Found malware configuration 2->56 58 Malicious sample detected (through community Yara rule) 2->58 62 12 other signatures 2->62 7 htm.exe 4 18 2->7         started        12 Gtltrkrz.PIF 2->12         started        14 Gtltrkrz.PIF 2->14         started        signatures3 60 Uses dynamic DNS services 34->60 process4 dnsIp5 40 trutru.duckdns.org 103.186.117.184, 1199, 49707, 49708 AARNET-AS-APAustralianAcademicandResearchNetworkAARNe unknown 7->40 42 dual-spov-0006.spov-msedge.net 13.107.139.11, 443, 49704, 49705 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 7->42 44 geoplugin.net 178.237.33.50, 49710, 80 ATOM86-ASATOM86NL Netherlands 7->44 28 C:\Users\Public\Librariesbehaviorgraphtltrkrz, data 7->28 dropped 30 C:\Users\Publicbehaviorgraphtltrkrz.url, MS 7->30 dropped 32 C:\ProgramData\fdvfdge\logs.dat, data 7->32 dropped 64 Detected Remcos RAT 7->64 66 Tries to steal Mail credentials (via file registry) 7->66 68 Contains functionalty to change the wallpaper 7->68 76 6 other signatures 7->76 16 htm.exe 1 7->16         started        19 htm.exe 1 7->19         started        21 extrac32.exe 1 7->21         started        24 2 other processes 7->24 70 Multi AV Scanner detection for dropped file 12->70 72 Contains functionality to bypass UAC (CMSTPLUA) 12->72 74 Machine Learning detection for dropped file 12->74 78 3 other signatures 12->78 file6 signatures7 process8 file9 46 Tries to steal Instant Messenger accounts or passwords 16->46 48 Tries to steal Mail credentials (via file / registry access) 16->48 50 Tries to harvest and steal browser information (history, passwords, etc) 19->50 26 C:\Users\Public\Librariesbehaviorgraphtltrkrz.PIF, PE32 21->26 dropped 52 Drops PE files with a suspicious file extension 21->52 signatures10
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b/
Threat name:
Win32.Backdoor.Remcos
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Status:
Malicious
First seen:
2024-05-09 09:21:08 UTC
File Type:
PE (Exe)
Extracted files:
44
AV detection:
17 of 24 (70.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=emh3hxobq6j2hjjaqefnpv3ownrjkwgde7b4d4cbrrozgc6kannq._file
Verdict:
malicious
Result
Malware family:
remcos
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Score:
  10/10
Tags:
family:remcos botnet:remotehost collection persistence rat spyware stealer
Link:
https://tria.ge/reports/240509-lbbehsae8x/
Behaviour
Script User-Agent
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Program crash
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Adds Run key to start application
Reads user/profile data of web browsers
NirSoft MailPassView
NirSoft WebBrowserPassView
Nirsoft
Remcos
Malware Config
C2 Extraction:
trutru.duckdns.org:1199
Unpacked files
SH256 hash:
230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b
MD5 hash:
983f094cf97faca11916d717b22b64ca
SHA1 hash:
01a2a60c6ef3ed356172acd97a050600d38ecf74
Detections:
SUSP_XORed_MSDOS_Stub_Message
Create hunting rule
Link:
https://www.unpac.me/results/6f49101c-a788-4097-945f-56f899aa868e/
Malware family:
Remcos
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/230fb3ddc187/report/overview.html
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/230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b

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:BLOWFISH_Constants
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Author:phoul (@phoul)
Description:Look for Blowfish constants
Rule name:BobSoftMiniDelphiBoBBobSoft
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Author:malware-lu
Rule name:Borland
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Author:malware-lu
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerException__SetConsoleCtrl
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:iexplorer_remcos
Create hunting rule
Author:iam-py-test
Description:Detect iexplorer being taken over by Remcos
Rule name:INDICATOR_EXE_Packed_MPress
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Author:ditekSHen
Description:Detects executables built or packed with MPress PE compressor
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
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Author:ditekSHen
Description:Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
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Author:ditekSHen
Description:Detects executables referencing many email and collaboration clients. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
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Author:ditekSHen
Description:Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)
Rule name:maldoc_find_kernel32_base_method_1
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Author:Didier Stevens (https://DidierStevens.com)
Rule name:maldoc_getEIP_method_1
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Author:Didier Stevens (https://DidierStevens.com)
Rule name:MD5_Constants
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Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_get_eip
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Author:Willi Ballenthin
Rule name:meth_stackstrings
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Author:Willi Ballenthin
Rule name:NET
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Author:malware-lu
Rule name:QbotStuff
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Author:anonymous
Rule name:Remcos
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Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:shellcode
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Author:nex
Description:Matched shellcode byte patterns
Rule name:SUSP_XORed_MSDOS_Stub_Message
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Author:Florian Roth
Description:Detects suspicious XORed MSDOS stub message
Reference:https://yara.readthedocs.io/en/latest/writingrules.html#xor-strings
Rule name:TeslaCryptPackedMalware
Create hunting rule
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Windows_Trojan_Remcos_b296e965
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Author:Elastic Security
Reference:https://www.elastic.co/security-labs/exploring-the-ref2731-intrusion-set
Rule name:win_remcos_auto
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Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.
Rule name:win_remcos_w0
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Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:without_attachments
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Author:Antonio Sanchez <asanchez@hispasec.com>
Description:Rule to detect the no presence of any attachment
Reference:http://laboratorio.blogs.hispasec.com/
Rule name:without_urls
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Author:Antonio Sanchez <asanchez@hispasec.com>
Description:Rule to detect the no presence of any url
Reference:http://laboratorio.blogs.hispasec.com/
Rule name:yarahub_win_remcos_rat_unpacked_aug_2023
Create hunting rule
Author:Matthew @ Embee_Research
Rule name:yara_template
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File information

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

Web download

RemcosRAT

Executable exe 230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2845011/
  
Delivery method
Distributed via web download

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_NXMissing Non-Executable Memory Protectioncritical
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh
Reviews
IDCapabilitiesEvidence
WIN32_PROCESS_APICan Create Process and Threadskernel32.dll::CloseHandle
kernel32.dll::CreateThread
WIN_BASE_APIUses Win Base APIkernel32.dll::LoadLibraryExA
kernel32.dll::LoadLibraryA
kernel32.dll::GetStartupInfoA
kernel32.dll::GetDiskFreeSpaceA
kernel32.dll::GetCommandLineA
WIN_BASE_IO_APICan Create Fileskernel32.dll::CreateFileA
kernel32.dll::FindFirstFileA
version.dll::GetFileVersionInfoSizeA
version.dll::GetFileVersionInfoA
WIN_REG_APICan Manipulate Windows Registryadvapi32.dll::RegOpenKeyExA
advapi32.dll::RegQueryValueExA
WIN_USER_APIPerforms GUI Actionsuser32.dll::ActivateKeyboardLayout
user32.dll::CreateMenu
user32.dll::FindWindowA
user32.dll::PeekMessageA
user32.dll::PeekMessageW
user32.dll::CreateWindowExA

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