MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 efbde8c3fc0f8f18b6b2c93fae4c7aaaa137f866a9d112ebdc534b8477485261. 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 15 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: efbde8c3fc0f8f18b6b2c93fae4c7aaaa137f866a9d112ebdc534b8477485261
SHA3-384 hash: 2531c6f69503fa0c690483cd7e6e593d1825891de5661efcdcff9bf6dd7d51cf68035b67eb6e8d0b82627f73fd4b1c54
SHA1 hash: c300f31e8e67b4bd92504b94d5d2294b0f8ef5cb
MD5 hash: 3b8dd99d65b19a84a276a05804005790
humanhash: butter-saturn-michigan-four
File name:z1PROOFOFPAYMENT.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:986'112 bytes
First seen:2024-04-22 16:04:01 UTC
Last seen:2024-04-22 16:34:47 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:uC8wC9aeW7T4WfjBrAodA0bbwkTQ8NmCQN0iiLX:uCG9+FvbzaCQ1
Threatray 3'916 similar samples on MalwareBazaar
TLSH T17F25224C7ABAEF1AC13D47B454324A5587B3616EA371EB0B0ECA90D96D36FC48C41B93
TrID 69.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.0% (.EXE) Win64 Executable (generic) (10523/12/4)
6.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.2% (.EXE) Win32 Executable (generic) (4504/4/1)
1.9% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Reporter FXOLabs
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
360
Origin country :
BR BR
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
efbde8c3fc0f8f18b6b2c93fae4c7aaaa137f866a9d112ebdc534b8477485261.exe
Verdict:
Malicious activity
Analysis date:
2024-04-22 23:12:15 UTC
Tags:
remcos rat keylogger
Link:
https://app.any.run/tasks/ee893189-a76a-4761-9072-c2e25feafcfb

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
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a process with a hidden window
Creating a file in the %temp% directory
Launching a process
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Setting a keyboard event handler
Connection attempt
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
masquerade obfuscated packed
Link:
https://www.filescan.io/uploads/66268a7854bafb7d21d8eca1/reports/97f97fb2-2865-46cf-b6d0-07fd91d6dd1a/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/efbde8c3fc0f8f18b6b2c93fae4c7aaaa137f866a9d112ebdc534b8477485261
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/1aee1c3d-d65f-4456-936e-293fdf513d28
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1429806
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
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
Found malware configuration
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Installs a global keyboard hook
Loading BitLocker PowerShell Module
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: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Remcos
Sigma detected: Scheduled temp file as task from temp location
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1429806 Sample: z1PROOFOFPAYMENT.exe Startdate: 22/04/2024 Architecture: WINDOWS Score: 100 44 Found malware configuration 2->44 46 Malicious sample detected (through community Yara rule) 2->46 48 Antivirus detection for URL or domain 2->48 50 12 other signatures 2->50 7 VbYQdeNcfJk.exe 5 2->7         started        10 z1PROOFOFPAYMENT.exe 7 2->10         started        process3 file4 52 Multi AV Scanner detection for dropped file 7->52 54 Contains functionality to bypass UAC (CMSTPLUA) 7->54 56 Contains functionalty to change the wallpaper 7->56 64 5 other signatures 7->64 13 VbYQdeNcfJk.exe 7->13         started        16 schtasks.exe 1 7->16         started        38 C:\Users\user\AppData\...\VbYQdeNcfJk.exe, PE32 10->38 dropped 40 C:\Users\user\AppData\Local\...\tmp1746.tmp, XML 10->40 dropped 58 Uses schtasks.exe or at.exe to add and modify task schedules 10->58 60 Adds a directory exclusion to Windows Defender 10->60 62 Injects a PE file into a foreign processes 10->62 18 z1PROOFOFPAYMENT.exe 3 2 10->18         started        22 powershell.exe 23 10->22         started        24 schtasks.exe 1 10->24         started        26 z1PROOFOFPAYMENT.exe 10->26         started        signatures5 process6 dnsIp7 28 conhost.exe 16->28         started        42 89.249.73.162, 2479 M247GB United Kingdom 18->42 36 C:\ProgramData\remcos\logs.dat, data 18->36 dropped 66 Detected Remcos RAT 18->66 68 Installs a global keyboard hook 18->68 70 Loading BitLocker PowerShell Module 22->70 30 WmiPrvSE.exe 22->30         started        32 conhost.exe 22->32         started        34 conhost.exe 24->34         started        file8 signatures9 process10
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/efbde8c3fc0f8f18b6b2c93fae4c7aaaa137f866a9d112ebdc534b8477485261
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/efbde8c3fc0f8f18b6b2c93fae4c7aaaa137f866a9d112ebdc534b8477485261/
Threat name:
Win32.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2024-04-22 06:01:11 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
20 of 24 (83.33%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=5666rq74b6hrrnvsze724td2vkqtp6dgvhirf264knfyi52ikjqq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
11db56471fe5f1c245d9fa8f6cfb9a86bd2aeb444c38cfd1c8ef159ec539c065
RemcosRAT
27721c56187587669e9037d4c7379dade8d197db2be2c85bb56176f4e5834e63
RemcosRAT
344301a6f73b73afd98c763519d52548b0ee3a76824d033712ddf3ec0115f549
RemcosRAT
b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da
RemcosRAT
+ 3'906 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:sthost rat
Link:
https://tria.ge/reports/240422-thxv4add2s/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Remcos
Malware Config
C2 Extraction:
89.249.73.162:2479
Unpacked files
SH256 hash:
a31148f6b799d9d43fc2de982036aacc234c7a4fdbaf0856608787a559d27cd3
MD5 hash:
5458947ee8627f1466205fe32884f1ca
SHA1 hash:
ece8e460c0d2622bac8e3e2ace9c1dabd8e09b38
Link:
https://www.unpac.me/results/a03dc04e-c183-4656-9bd0-63648d5b1f45/
SH256 hash:
1c633f39a192f108f755e0bcf412e8489ad80781f3b7807c80892deb2526ff0d
MD5 hash:
e4b5d57e9e46a4e76075b5b92f71577f
SHA1 hash:
d76dc165724148193c6911cc75fc62c198737d3a
Link:
https://www.unpac.me/results/a03dc04e-c183-4656-9bd0-63648d5b1f45/
Parent samples :
d89ea6a01347b82f963ed7960583e5d76c6a07e91852fae83bc290e0f64a06b2
3f700fd41c6cca501d50cc2f62afd8e0d951efc1a918aa65ab3e84ee563ff1d6
26a36920e7a463398a4251828ec02fd965ad1d782f819b0c04904706efb083be
SH256 hash:
8189e988da906fda04938ff9f0e5958c5db04e32a1b7cea2272138a674c75bb2
MD5 hash:
e6d53293e343713c99ce85adb9423c85
SHA1 hash:
12399663f01e8c5b37854e31eaeba9d216c0a1f5
Link:
https://www.unpac.me/results/a03dc04e-c183-4656-9bd0-63648d5b1f45/
SH256 hash:
5f7e634c3e7e703beb1aff63e044e119060770a78e5e475623bdb4412b72abd2
MD5 hash:
52b845aced1e9e909338ae049d85a400
SHA1 hash:
082461a36d7acf1362cd8755a50d400575deb764
Detections:
Remcos
Create hunting rule
win_remcos_w0
Create hunting rule
win_remcos_auto
Create hunting rule
malware_windows_remcos_rat
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Link:
https://www.unpac.me/results/a03dc04e-c183-4656-9bd0-63648d5b1f45/
Parent samples :
c0b13c8cf91f75fb3ae9448b92656ccf90dbf374855d10add7d8a972bdc5d5b4
70543b4c967b3f474e895b299d778cd3b64e321f654ec02f580ff2d3ad7813e6
11db56471fe5f1c245d9fa8f6cfb9a86bd2aeb444c38cfd1c8ef159ec539c065
d973dd4c64c7534cceca0abcd0781742364ea652c6abcbe8206977345b738a57
2400e5356331123e2b6f8f27c824c7850acf55c92ba6554c81883b9dc94570d5
efbde8c3fc0f8f18b6b2c93fae4c7aaaa137f866a9d112ebdc534b8477485261
3dbe769bb2675de3bada40f257ce820b7356c2acb79bb3d4509d145fc9150772
SH256 hash:
efbde8c3fc0f8f18b6b2c93fae4c7aaaa137f866a9d112ebdc534b8477485261
MD5 hash:
3b8dd99d65b19a84a276a05804005790
SHA1 hash:
c300f31e8e67b4bd92504b94d5d2294b0f8ef5cb
Link:
https://www.unpac.me/results/a03dc04e-c183-4656-9bd0-63648d5b1f45/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/efbde8c3fc0f/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

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:NET
Create hunting rule
Author:malware-lu
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: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 efbde8c3fc0f8f18b6b2c93fae4c7aaaa137f866a9d112ebdc534b8477485261

(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 (HIGH_ENTROPY_VA)high

Comments