MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 98b668f7457089866b6364c672e8dd35b12a24899eb80fdfcfc2a5aab8d9aa5b. 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: 17


Intelligence 17 IOCs YARA 13 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 98b668f7457089866b6364c672e8dd35b12a24899eb80fdfcfc2a5aab8d9aa5b
SHA3-384 hash: 17792bb405191e873cf059d208df3c369bc9ea3404c40c605c5523c26b27c6cf64d42773632c03986c09e2efd3b27797
SHA1 hash: 967e37264a5e0982b21b267211f9c5ccdc1662cf
MD5 hash: a5116c0a496d4b011dd2afc12147d1b2
humanhash: minnesota-table-saturn-montana
File name:Specification-Glycyrrhetic Acid 3-O-Glucuronide.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:948'868 bytes
First seen:2024-03-28 12:56:06 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
ssdeep 24576:8cKhi13lO4V99LzjUdKc7dJ3iPOgrNiFj2+:NKE1hLzjA7Z8Piz
Threatray 1'619 similar samples on MalwareBazaar
TLSH T1EA1523935C64B017CF268A7B3A68176E123F5E9EBEE1EA5FC40E729AC7732D40113485
TrID 44.4% (.EXE) Win64 Executable (generic) (10523/12/4)
21.3% (.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 4c33d8d4d4d8324c (40 x AgentTesla, 23 x RedLineStealer, 15 x RemcosRAT)
Reporter lowmal3
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
334
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
98b668f7457089866b6364c672e8dd35b12a24899eb80fdfcfc2a5aab8d9aa5b.exe
Verdict:
Malicious activity
Analysis date:
2024-03-28 12:56:52 UTC
Tags:
rat remcos stealer keylogger
Link:
https://app.any.run/tasks/6a509433-9203-4e76-a7b7-c270326f44a8

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a 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
Unauthorized injection to a recently created process by context flags manipulation
Stealing user critical data
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
overlay packed
Link:
https://www.filescan.io/uploads/660569251c5277edcec33e33/reports/6dfdccac-8181-48a3-867f-b1610d3e2d2d/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/98b668f7457089866b6364c672e8dd35b12a24899eb80fdfcfc2a5aab8d9aa5b
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
REMCOS
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/175ccbbf-352f-4531-b327-7a18968321ca
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/1417013
Signature
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
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
Drops PE files with benign system names
Found malware configuration
Injects a PE file into a foreign processes
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 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: Remcos
Sigma detected: Schedule system process
Sigma detected: Suspect Svchost Activity
Sigma detected: System File Execution Location Anomaly
Snort IDS alert for network traffic
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: 1417013 Sample: Specification-Glycyrrhetic ... Startdate: 28/03/2024 Architecture: WINDOWS Score: 100 75 geoplugin.net 2->75 81 Snort IDS alert for network traffic 2->81 83 Found malware configuration 2->83 85 Malicious sample detected (through community Yara rule) 2->85 87 17 other signatures 2->87 9 svchost.exe 2 2->9         started        12 Specification-Glycyrrhetic Acid 3-O-Glucuronide.exe 1 7 2->12         started        15 svchost.exe 2->15         started        17 7 other processes 2->17 signatures3 process4 dnsIp5 107 Antivirus detection for dropped file 9->107 109 Machine Learning detection for dropped file 9->109 111 Uses regedit.exe to modify the Windows registry 9->111 20 ilasm.exe 3 16 9->20         started        25 WerFault.exe 19 16 9->25         started        37 3 other processes 9->37 67 C:\Users\user\AppData\Roaming\svchost.exe, PE32+ 12->67 dropped 113 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 12->113 27 cmd.exe 1 12->27         started        29 cmd.exe 1 12->29         started        115 Writes to foreign memory regions 15->115 117 Allocates memory in foreign processes 15->117 119 Injects a PE file into a foreign processes 15->119 31 vbc.exe 15->31         started        33 WerFault.exe 15->33         started        73 127.0.0.1 unknown unknown 17->73 69 C:\Windows\Temp\zxbcf5kv.inf, Windows 17->69 dropped 71 C:\Windows\Temp\exscsthh.inf, Windows 17->71 dropped 35 WerFault.exe 2 17->35         started        39 5 other processes 17->39 file6 signatures7 process8 dnsIp9 77 172.245.208.13, 4445, 49702, 49704 AS-COLOCROSSINGUS United States 20->77 79 geoplugin.net 178.237.33.50, 49706, 80 ATOM86-ASATOM86NL Netherlands 20->79 65 C:\ProgramData\remcos\logs.dat, data 20->65 dropped 89 Detected Remcos RAT 20->89 91 Tries to steal Mail credentials (via file registry) 20->91 93 Maps a DLL or memory area into another process 20->93 95 Installs a global keyboard hook 20->95 41 ilasm.exe 20->41         started        44 ilasm.exe 20->44         started        46 ilasm.exe 20->46         started        58 2 other processes 20->58 48 svchost.exe 2 27->48         started        50 conhost.exe 27->50         started        52 timeout.exe 1 27->52         started        97 Uses schtasks.exe or at.exe to add and modify task schedules 29->97 54 conhost.exe 29->54         started        56 schtasks.exe 1 29->56         started        99 Contains functionality to bypass UAC (CMSTPLUA) 31->99 101 Contains functionalty to change the wallpaper 31->101 103 Contains functionality to steal Chrome passwords or cookies 31->103 105 2 other signatures 31->105 file10 signatures11 process12 signatures13 121 Tries to steal Instant Messenger accounts or passwords 41->121 123 Tries to steal Mail credentials (via file / registry access) 41->123 125 Tries to harvest and steal browser information (history, passwords, etc) 44->125 127 Writes to foreign memory regions 48->127 129 Allocates memory in foreign processes 48->129 131 Injects a PE file into a foreign processes 48->131 60 csc.exe 48->60         started        63 WerFault.exe 48->63         started        process14 signatures15 133 Contains functionality to bypass UAC (CMSTPLUA) 60->133 135 Detected Remcos RAT 60->135 137 Contains functionalty to change the wallpaper 60->137 139 4 other signatures 60->139
Score:
52%
Verdict:
Susipicious
File Type:
PE
Link:
https://malprob.io/report/98b668f7457089866b6364c672e8dd35b12a24899eb80fdfcfc2a5aab8d9aa5b
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/98b668f7457089866b6364c672e8dd35b12a24899eb80fdfcfc2a5aab8d9aa5b/
Threat name:
ByteCode-MSIL.Trojan.Znyonm
Create hunting rule
Status:
Malicious
First seen:
2024-03-28 11:36:05 UTC
File Type:
PE+ (.Net Exe)
Extracted files:
4
AV detection:
17 of 22 (77.27%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=tc3gr52foceym23dmtdhf2g5gwysujejt24a7x6pyks2vogzvjnq._file
Verdict:
malicious
Similar samples:
05bcef8138fe660e6b755afb54117d5872829732fa017f0eb13a5cb1007122f6
RemcosRAT
70060d2f81493d076b3865dd1401aec13a95e6ed6c69c97e2346113225f4c21a
RemcosRAT
74ab97b09af8d1277126ff92b065ce8f08c3dc28f17745e78c0d8fcf0e8b5447
RemcosRAT
92d7ef7804d5df94c5434397d1e5ae6c01c235e85dd5782e3532f12ce48eb10d
RemcosRAT
9f081f0f32e40b2a8079d05f5177f8edbd1ad58a60c18ddb705cc7609af6b8b8
RemcosRAT
a8c26eb8e471c8df04e6703e603795243821f457d9b9715afdaf0b1f481a3149
RemcosRAT
+ 1'609 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:jons collection persistence rat
Link:
https://tria.ge/reports/240328-p6xg1sfg67/
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
Runs regedit.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
NirSoft MailPassView
NirSoft WebBrowserPassView
Nirsoft
Remcos
Malware Config
C2 Extraction:
172.245.208.13:4445
Unpacked files
SH256 hash:
98b668f7457089866b6364c672e8dd35b12a24899eb80fdfcfc2a5aab8d9aa5b
MD5 hash:
a5116c0a496d4b011dd2afc12147d1b2
SHA1 hash:
967e37264a5e0982b21b267211f9c5ccdc1662cf
Link:
https://www.unpac.me/results/6b06f813-6907-4274-860a-3432261e23ec/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/98b668f74570/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/98b668f7457089866b6364c672e8dd35b12a24899eb80fdfcfc2a5aab8d9aa5b

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: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_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:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
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

File information

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

Malspam

RemcosRAT

Executable exe 98b668f7457089866b6364c672e8dd35b12a24899eb80fdfcfc2a5aab8d9aa5b

(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