MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b12ca6670877a54a4762123516c35021e8ec9c5c231f31a134cde611fea65490. 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: 13


Intelligence 13 IOCs YARA 20 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b12ca6670877a54a4762123516c35021e8ec9c5c231f31a134cde611fea65490
SHA3-384 hash: 5f584ce10e22ec5c4de4ebfc696167b559a12bce0fc8b8ceca7dc96f7bc2abfbc9fc3508bdf35a26f4984690f785bc55
SHA1 hash: 8df4896d0686ba1fb6cb5ad04517019be7a46dde
MD5 hash: 795921061997e8c1fe2c61df65a8ba2a
humanhash: social-oranges-item-montana
File name:795921061997e8c1fe2c61df65a8ba2a
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:5'871'672 bytes
First seen:2024-02-26 08:46:45 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'663 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 49152:xLggQyNoVWo1AAP+TxjQV4tuTbBesknFLIxYB0lj81zcZs:6yN8gTxsaQ9wFLIuBI81Us
Threatray 2 similar samples on MalwareBazaar
TLSH T1BF465B01FEFA1E4AC149173F850385D363A2E9CC9393EB5F069CF96B0E513581EA96D2
TrID 70.8% (.CPL) Windows Control Panel Item (generic) (57583/11/19)
12.9% (.EXE) Win64 Executable (generic) (10523/12/4)
6.2% (.EXE) Win16 NE executable (generic) (5038/12/1)
2.5% (.ICL) Windows Icons Library (generic) (2059/9)
2.4% (.EXE) OS/2 Executable (generic) (2029/13)
Reporter zbetcheckin
Tags:64 exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
484
Origin country :
FR FR
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/477774/
Detection(s):
Win.Trojan.EmbeddedDotNetBinary-9940868-0
Create hunting rule

Win.Trojan.EmbeddedReversedDLL-9940922-0
Create hunting rule

Win.Trojan.Generic-10014419-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Launching a process
Creating a file
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a process with a hidden window
Сreating synchronization primitives
Enabling the 'hidden' option for recently created files
DNS request
Connection attempt
Sending a custom TCP request
Sending an HTTP GET request
Creating a window
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
keylogger overlay packed
Link:
https://www.filescan.io/uploads/65dc500a22703c3491b266e1/reports/e917c597-a891-450a-9940-ca4bf4bae8c0/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/b12ca6670877a54a4762123516c35021e8ec9c5c231f31a134cde611fea65490
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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/83a55ef1-d1e8-4925-a252-9221267112b3
Result
Threat name:
Remcos, PureLog Stealer
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1398613
Signature
.NET source code contains potential unpacker
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
Creates autostart registry keys with suspicious names
Delayed program exit found
Found evasive API chain (may stop execution after checking mutex)
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
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: Remcos
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)
Uses dynamic DNS services
Writes to foreign memory regions
Yara detected Costura Assembly Loader
Yara detected PureLog Stealer
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1398613 Sample: 4QXt34A1bX.exe Startdate: 26/02/2024 Architecture: WINDOWS Score: 100 31 gamemodz.duckdns.org 2->31 33 geoplugin.net 2->33 35 2 other IPs or domains 2->35 49 Multi AV Scanner detection for domain / URL 2->49 51 Found malware configuration 2->51 53 Malicious sample detected (through community Yara rule) 2->53 57 12 other signatures 2->57 10 4QXt34A1bX.exe 1 2->10         started        signatures3 55 Uses dynamic DNS services 31->55 process4 signatures5 75 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 10->75 77 Writes to foreign memory regions 10->77 79 Modifies the context of a thread in another process (thread injection) 10->79 81 Injects a PE file into a foreign processes 10->81 13 MSBuild.exe 1 10->13         started        process6 file7 29 C:\Users\user\AppData\Local\...\sms9999.tmp, PE32 13->29 dropped 16 sms9999.tmp 3 2 13->16         started        process8 file9 27 C:\ProgramData\RuntimeBroker.exe, PE32 16->27 dropped 41 Antivirus detection for dropped file 16->41 43 Multi AV Scanner detection for dropped file 16->43 45 Contains functionality to bypass UAC (CMSTPLUA) 16->45 47 6 other signatures 16->47 20 RuntimeBroker.exe 4 13 16->20         started        signatures10 process11 dnsIp12 37 gamemodz.duckdns.org 45.128.96.133, 2404, 49706 XXLNETNL Germany 20->37 39 geoplugin.net 178.237.33.50, 49707, 80 ATOM86-ASATOM86NL Netherlands 20->39 59 Antivirus detection for dropped file 20->59 61 Multi AV Scanner detection for dropped file 20->61 63 Machine Learning detection for dropped file 20->63 65 2 other signatures 20->65 24 svchost.exe 20->24         started        signatures13 process14 signatures15 67 Contains functionality to bypass UAC (CMSTPLUA) 24->67 69 Found evasive API chain (may stop execution after checking mutex) 24->69 71 Contains functionalty to change the wallpaper 24->71 73 3 other signatures 24->73
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b12ca6670877a54a4762123516c35021e8ec9c5c231f31a134cde611fea65490
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b12ca6670877a54a4762123516c35021e8ec9c5c231f31a134cde611fea65490/
Threat name:
Win64.Trojan.Remloader
Create hunting rule
Status:
Malicious
First seen:
2024-02-26 08:47:12 UTC
File Type:
PE+ (.Net Exe)
Extracted files:
5
AV detection:
20 of 24 (83.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wewkmzyio6suur3cci2rnq2qehuozhc4emptdijuzxtbd7vgksia._file
Verdict:
malicious
Similar samples:
552686b2265e72d6eb05add08edb3415b932393b65370d087660dff37d4616b8
RemcosRAT
Result
Malware family:
zgrat
Create hunting rule
Score:
  10/10
Tags:
family:remcos family:zgrat botnet:remotehost persistence rat
Link:
https://tria.ge/reports/240226-kpwf6shf22/
Behaviour
Enumerates system info in registry
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
Detect ZGRat V1
Remcos
ZGRat
Malware Config
C2 Extraction:
gamemodz.duckdns.org:2404
Unpacked files
SH256 hash:
b12ca6670877a54a4762123516c35021e8ec9c5c231f31a134cde611fea65490
MD5 hash:
795921061997e8c1fe2c61df65a8ba2a
SHA1 hash:
8df4896d0686ba1fb6cb5ad04517019be7a46dde
Detections:
Typical_Malware_String_Transforms
Create hunting rule
Link:
https://www.unpac.me/results/7bde2f97-e06c-4e49-80c2-bbc2cc57a619/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b12ca6670877/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.17
Link:
https://yomi.yoroi.company/submissions/b12ca6670877a54a4762123516c35021e8ec9c5c231f31a134cde611fea65490

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:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_imphash
Create hunting rule
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Typical_Malware_String_Transforms
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects typical strings in a reversed or otherwise modified form
Reference:Internal Research
Rule name:Typical_Malware_String_Transforms_RID3473
Create hunting rule
Author:Florian Roth
Description:Detects typical strings in a reversed or otherwise modified form
Reference:Internal Research
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.

Web download

RemcosRAT

Executable exe b12ca6670877a54a4762123516c35021e8ec9c5c231f31a134cde611fea65490

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2770721/
Cape
Cape
https://www.capesandbox.com/analysis/477774/

Comments


Avatar
zbet commented on 2024-02-26 08:46:46 UTC

url : hxxp://23.224.102.6:8001/StiHjCd8XI/RuntimeBroker.exe