MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070. 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: 14


Intelligence 14 IOCs YARA 27 File information Comments
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SHA256 hash: 5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070
SHA3-384 hash: 34f99adc0b1d32a3b640542cd3880b6cc12df587947e1acdca2fff0033f32470fe7bd6a8501f28533bf59b81f8a47580
SHA1 hash: cf230bc4206a1789858160a0f2d3a87ed14c36a9
MD5 hash: 1b8e229e83f21a946115606f54fe6b8d
humanhash: tango-mirror-william-wisconsin
File name:INQUIRY#46789-MAY_product_materials.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:930'732 bytes
First seen:2024-05-08 06:37:01 UTC
Last seen:2024-05-08 07:20:07 UTC
File type:Executable exe
MIME type:application/x-dosexec
ssdeep 24576:dzobfftwFNnnpXNihW/lZpM8fsp/vY6Jvui7Uxmt9H16OE:dcbXtANn1EhWxMW2+eUxmtV1XE
Threatray 227 similar samples on MalwareBazaar
TLSH T13415124BB61C0BAED39D97B3783913704668CF930541A99AFDE9ED6E123131CAD430DA
TrID 44.4% (.EXE) Win64 Executable (generic) (10523/12/4)
21.2% (.EXE) Win16 NE executable (generic) (5038/12/1)
8.7% (.ICL) Windows Icons Library (generic) (2059/9)
8.5% (.EXE) OS/2 Executable (generic) (2029/13)
8.4% (.EXE) Generic Win/DOS Executable (2002/3)
File icon (PE):PE icon
dhash icon e2ee8a8eb6d8ecf4 (56 x AgentTesla, 39 x RemcosRAT, 38 x GuLoader)
Reporter lowmal3
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
340
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070.exe
Verdict:
Malicious activity
Analysis date:
2024-05-08 06:39:31 UTC
Tags:
remcos
Link:
https://app.any.run/tasks/a44dc676-c4de-45e8-a270-24c4ca31e5f1

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win64.PWSX-gen.17159.387.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Creating a file
Launching a process
Creating a process from a recently created file
Searching for synchronization primitives
Connection attempt
Sending a custom TCP request
Launching the default Windows debugger (dwwin.exe)
DNS request
Sending an HTTP GET request
Reading critical registry keys
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process
Blocking the User Account Control
Unauthorized injection to a recently created process by context flags manipulation
Stealing user critical data
Enabling autorun by creating a file
Adding an exclusion to Microsoft Defender
Unauthorized injection to a system process
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/9c3f5ace-64a2-48f0-8880-f85eaef4a34d
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1437955
Signature
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
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
Disables UAC (registry)
Drops PE files with benign system names
Found malware configuration
Injects a PE file into a foreign processes
Loading BitLocker PowerShell Module
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 domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Files With System Process Name In Unsuspected Locations
Sigma detected: Invoke-Obfuscation CLIP+ Launcher
Sigma detected: Invoke-Obfuscation VAR+ Launcher
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Remcos
Sigma detected: Schedule system process
Sigma detected: Suspect Svchost Activity
Sigma detected: System File Execution Location Anomaly
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
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 regedit.exe to modify the Windows registry
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM3
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: 1437955 Sample: INQUIRY#46789-MAY_product_m... Startdate: 08/05/2024 Architecture: WINDOWS Score: 100 62 geoplugin.net 2->62 68 Multi AV Scanner detection for domain / URL 2->68 70 Found malware configuration 2->70 72 Malicious sample detected (through community Yara rule) 2->72 74 16 other signatures 2->74 9 svchost.exe 1 4 2->9         started        12 cmd.exe 1 2->12         started        14 svchost.exe 2->14         started        16 4 other processes 2->16 signatures3 process4 file5 118 Multi AV Scanner detection for dropped file 9->118 120 Uses regedit.exe to modify the Windows registry 9->120 122 Writes to foreign memory regions 9->122 124 Disables UAC (registry) 9->124 19 vbc.exe 9->19         started        23 powershell.exe 23 9->23         started        31 2 other processes 9->31 25 svchost.exe 4 12->25         started        33 2 other processes 12->33 126 Allocates memory in foreign processes 14->126 128 Adds a directory exclusion to Windows Defender 14->128 130 Injects a PE file into a foreign processes 14->130 27 aspnet_wp.exe 14->27         started        29 powershell.exe 14->29         started        35 2 other processes 14->35 60 C:\Users\user\AppData\Roaming\svchost.exe, PE32+ 16->60 dropped 132 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 16->132 134 Uses schtasks.exe or at.exe to add and modify task schedules 16->134 136 Drops PE files with benign system names 16->136 37 12 other processes 16->37 signatures6 process7 dnsIp8 64 64.188.26.202, 1604, 49730, 49733 ASN-QUADRANET-GLOBALUS United States 19->64 66 geoplugin.net 178.237.33.50, 49739, 80 ATOM86-ASATOM86NL Netherlands 19->66 76 Detected Remcos RAT 19->76 78 Tries to steal Mail credentials (via file registry) 19->78 80 Tries to harvest and steal browser information (history, passwords, etc) 19->80 82 Maps a DLL or memory area into another process 19->82 39 vbc.exe 19->39         started        42 vbc.exe 19->42         started        44 vbc.exe 19->44         started        84 Loading BitLocker PowerShell Module 23->84 46 conhost.exe 23->46         started        86 Writes to foreign memory regions 25->86 88 Allocates memory in foreign processes 25->88 90 Adds a directory exclusion to Windows Defender 25->90 92 Injects a PE file into a foreign processes 25->92 48 ngen.exe 25->48         started        50 powershell.exe 25->50         started        56 2 other processes 25->56 94 Contains functionality to bypass UAC (CMSTPLUA) 27->94 96 Contains functionalty to change the wallpaper 27->96 98 Contains functionality to steal Chrome passwords or cookies 27->98 100 2 other signatures 27->100 52 conhost.exe 29->52         started        54 conhost.exe 37->54         started        signatures9 process10 signatures11 102 Tries to steal Instant Messenger accounts or passwords 39->102 104 Tries to steal Mail credentials (via file / registry access) 39->104 106 Tries to harvest and steal browser information (history, passwords, etc) 42->106 108 Contains functionality to bypass UAC (CMSTPLUA) 48->108 110 Detected Remcos RAT 48->110 112 Contains functionalty to change the wallpaper 48->112 116 4 other signatures 48->116 114 Loading BitLocker PowerShell Module 50->114 58 conhost.exe 50->58         started        process12
Score:
86%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070/
Threat name:
Win64.Trojan.Malgent
Create hunting rule
Status:
Malicious
First seen:
2024-05-08 01:15:35 UTC
File Type:
PE+ (.Net Exe)
Extracted files:
3
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=kmi5qjods5lwlsnjuvxxykhzrnxzfsilegrkl3grxo5qvk6yebya._file
Verdict:
malicious
Similar samples:
05bcef8138fe660e6b755afb54117d5872829732fa017f0eb13a5cb1007122f6
RemcosRAT
1f36105fbca8245e77816446dac72f48a87dba68aa89c323ec655010764d0f2c
RemcosRAT
20f140b6b03ab5318a5c9ce920528c982184ea1fa5e4e51dd3925eedf36ea924
RemcosRAT
59c388b975d290fa525ffefe5aaecb011219ebd3121a7e79e913d980fb7af951
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612300066252c3151883d30f69a9b287c323a4a484a35ca553c5a73d3f7d0cfc
RemcosRAT
b1bf0f6717341cb605ebf48e85805282b77e5a3d610f211b90e4ec726b448331
RemcosRAT
bfcf6d5227339dcf5e3a724db318f0f4b1b1ffe0635a94bc4555bb4a690a2750
RemcosRAT
d0ef5d7c8fa467cca0626b576f96dc86a58293b859aa5ddd4aa0ff1304427d04
RemcosRAT
d562b3b44859f761645676e0c0e7daad1226c5b90f53b4fe5e5395bf77454ec7
RemcosRAT
+ 217 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:papi collection evasion execution persistence rat trojan
Link:
https://tria.ge/reports/240508-hdhd3aab54/
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System policy modification
Uses Task Scheduler COM API
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Adds Run key to start application
Checks whether UAC is enabled
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Uses the VBS compiler for execution
Windows security modification
Command and Scripting Interpreter: PowerShell
NirSoft MailPassView
NirSoft WebBrowserPassView
Nirsoft
Remcos
UAC bypass
Windows security bypass
Malware Config
C2 Extraction:
64.188.26.202:1604
Unpacked files
SH256 hash:
5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070
MD5 hash:
1b8e229e83f21a946115606f54fe6b8d
SHA1 hash:
cf230bc4206a1789858160a0f2d3a87ed14c36a9
Link:
https://www.unpac.me/results/7603922c-7028-46b1-bc73-058d83beb4bb/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/5311d825c397/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/5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070

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
Create hunting rule
Author:phoul (@phoul)
Description:Look for Blowfish constants
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:iexplorer_remcos
Create hunting rule
Author:iam-py-test
Description:Detect iexplorer being taken over by Remcos
Rule name:INDICATOR_EXE_Packed_MPress
Create hunting rule
Author:ditekSHen
Description:Detects executables built or packed with MPress PE compressor
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
Create hunting rule
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
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many email and collaboration clients. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Author:ditekSHen
Description:Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)
Rule name:maldoc_find_kernel32_base_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:maldoc_getEIP_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:QbotStuff
Create hunting rule
Author:anonymous
Rule name:Remcos
Create hunting rule
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: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
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/exploring-the-ref2731-intrusion-set
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.
Rule name:win_remcos_w0
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:yarahub_win_remcos_rat_unpacked_aug_2023
Create hunting rule
Author:Matthew @ Embee_Research
Rule name:yara_template
Create hunting rule

File information

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

Malspam

RemcosRAT

Executable exe 5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070

(this sample)

  
Delivery method
Distributed via e-mail attachment

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_DLL_CHARACTERISTICSMissing dll Security Characteristics (GUARD_CF)high

Comments