MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 05a341a2577c728e8a994775b17b8c5562539146d78a5de948e3534e1ae1c629. 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 16 File information Comments
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SHA256 hash: 05a341a2577c728e8a994775b17b8c5562539146d78a5de948e3534e1ae1c629
SHA3-384 hash: 3501c0e068da8be63138c2a36f70f682d0615b8f3577a266b328c1aa6841331e55cd7bf5e2296f71959f16d0282c0909
SHA1 hash: 4e5c18fcbf06212d952e084b1b455ecc136e4845
MD5 hash: 931254205cd64ad16b18fc9b318e2ca6
humanhash: montana-delta-avocado-ohio
File name:proof of payment.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:927'744 bytes
First seen:2024-05-03 11:11:16 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:ppB778QH0fay4iJDieHNq5lVnsUc/Nb2JF5xXwGp94GEXHMY1E7LgHPPkqM7E6:bBWkithtq5jsT/9mb9PUsv7LMPZM7E6
Threatray 3'989 similar samples on MalwareBazaar
TLSH T11B1523809058BBF1E57E4F762A6F0D9D4BA930191A41E3DE88A371DCCD927125F6332D
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)
File icon (PE):PE icon
dhash icon 4018f9e960e20464 (19 x AgentTesla, 6 x Formbook, 2 x PureLogsStealer)
Reporter TeamDreier
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
337
Origin country :
DK DK
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
05a341a2577c728e8a994775b17b8c5562539146d78a5de948e3534e1ae1c629.exe
Verdict:
Malicious activity
Analysis date:
2024-05-03 11:14:42 UTC
Tags:
rat remcos remote keylogger evasion
Link:
https://app.any.run/tasks/0d93ce9a-975d-4fb5-847d-61a4504e8eee

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Packed.Taskun-10029126-0
Create hunting rule

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
Sending a custom TCP request
DNS request
Sending an HTTP GET request
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
80%
Tags:
masquerade packed remcos
Link:
https://www.filescan.io/uploads/6634c68e0694596be92fcc4d/reports/65eedb11-032d-429d-8057-0f2de44e8f32/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/05a341a2577c728e8a994775b17b8c5562539146d78a5de948e3534e1ae1c629
Malware family:
Agent Tesla
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/9fefd810-ff77-41d9-ba37-ffe37f0465d4
Result
Threat name:
Remcos, PureLog Stealer
Create hunting rule
Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1435940
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
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
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)
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: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Remcos
Sigma detected: Scheduled temp file as task from temp location
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 schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected PureLog Stealer
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: 1435940 Sample: proof of payment.exe Startdate: 03/05/2024 Architecture: WINDOWS Score: 100 50 geoplugin.net 2->50 66 Found malware configuration 2->66 68 Malicious sample detected (through community Yara rule) 2->68 70 Antivirus detection for URL or domain 2->70 72 19 other signatures 2->72 8 proof of payment.exe 7 2->8         started        12 NvbYSEq.exe 5 2->12         started        signatures3 process4 file5 44 C:\Users\user\AppData\Roaming44vbYSEq.exe, PE32 8->44 dropped 46 C:\Users\user\AppData\Local\...\tmpCCF4.tmp, XML 8->46 dropped 74 Adds a directory exclusion to Windows Defender 8->74 14 proof of payment.exe 3 15 8->14         started        19 powershell.exe 20 8->19         started        21 schtasks.exe 1 8->21         started        76 Antivirus detection for dropped file 12->76 78 Multi AV Scanner detection for dropped file 12->78 80 Contains functionality to bypass UAC (CMSTPLUA) 12->80 82 7 other signatures 12->82 23 NvbYSEq.exe 12->23         started        25 schtasks.exe 1 12->25         started        signatures6 process7 dnsIp8 52 37.120.235.122, 2269, 49708, 49712 SECURE-DATA-ASRO Romania 14->52 54 geoplugin.net 178.237.33.50, 49715, 80 ATOM86-ASATOM86NL Netherlands 14->54 48 C:\ProgramData\remcos\logs.dat, data 14->48 dropped 56 Detected Remcos RAT 14->56 58 Tries to harvest and steal browser information (history, passwords, etc) 14->58 60 Maps a DLL or memory area into another process 14->60 62 Installs a global keyboard hook 14->62 27 proof of payment.exe 14->27         started        30 proof of payment.exe 14->30         started        32 proof of payment.exe 14 14->32         started        42 3 other processes 14->42 64 Loading BitLocker PowerShell Module 19->64 34 WmiPrvSE.exe 19->34         started        36 conhost.exe 19->36         started        38 conhost.exe 21->38         started        40 conhost.exe 25->40         started        file9 signatures10 process11 signatures12 84 Tries to steal Instant Messenger accounts or passwords 27->84 86 Tries to steal Mail credentials (via file / registry access) 27->86 88 Tries to harvest and steal browser information (history, passwords, etc) 30->88
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/05a341a2577c728e8a994775b17b8c5562539146d78a5de948e3534e1ae1c629
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/05a341a2577c728e8a994775b17b8c5562539146d78a5de948e3534e1ae1c629/
Threat name:
ByteCode-MSIL.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2024-05-01 00:57:18 UTC
File Type:
PE (.Net Exe)
Extracted files:
9
AV detection:
22 of 24 (91.67%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=awrudisxprzi5cuzi523c64mkvrfhekg26ff32ki4nju4gxbyyuq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
11db56471fe5f1c245d9fa8f6cfb9a86bd2aeb444c38cfd1c8ef159ec539c065
RemcosRAT
1fbac26d1db7fce1f1ddc5c552ab50ac44888d906e355f2a9187544a52cb8c94
RemcosRAT
a1fafc7d9825ebd9d7dc533f005452ce890bda0e668a05d9badadbfe08d2e22a
RemcosRAT
efbde8c3fc0f8f18b6b2c93fae4c7aaaa137f866a9d112ebdc534b8477485261
RemcosRAT
+ 3'979 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost collection execution rat spyware stealer
Link:
https://tria.ge/reports/240503-navg4sdb3z/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Checks computer location settings
Reads user/profile data of web browsers
Command and Scripting Interpreter: PowerShell
NirSoft MailPassView
NirSoft WebBrowserPassView
Nirsoft
Remcos
Malware Config
C2 Extraction:
37.120.235.122:2269
Unpacked files
SH256 hash:
4909093c1045073940daf73778f88ce3e5d4dcbc0d69e3498ad4672c2e699013
MD5 hash:
28b43a10958caef0465f7b93be0a0d77
SHA1 hash:
9c85c1cb7f6face0a6c8d0a2d2314a99092d6554
Link:
https://www.unpac.me/results/22fa70fb-dc1f-4591-8908-a46bcb7f3e51/
SH256 hash:
aed4a976a528f9472b707daae3bc4e722978bce7f0ac54b72cf1cfcd5981a5d8
MD5 hash:
9e4aea62ee76efb9013e6440afd8ffe6
SHA1 hash:
8d597f109698e7c74da0f20815fc4da575ce29c4
Link:
https://www.unpac.me/results/22fa70fb-dc1f-4591-8908-a46bcb7f3e51/
SH256 hash:
ecfcf7bf21fd1622c27d30c6a57ed9c362d2acdb2812a6f803b53e22d422eb32
MD5 hash:
a5192e30cc1ec9efbdf7fc4f91fc1475
SHA1 hash:
84cd8dc05061fb59bca5d3985227c8eaa264bf24
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/22fa70fb-dc1f-4591-8908-a46bcb7f3e51/
Parent samples :
1fbac26d1db7fce1f1ddc5c552ab50ac44888d906e355f2a9187544a52cb8c94
05a341a2577c728e8a994775b17b8c5562539146d78a5de948e3534e1ae1c629
SH256 hash:
ae441dfae019426a4236836fa281784421d075b5c25bada6a462bbb688642883
MD5 hash:
62614a19a57be7b515ae80067bf57e63
SHA1 hash:
04563a1f1bc52494607629284b6174c3806657d5
Link:
https://www.unpac.me/results/22fa70fb-dc1f-4591-8908-a46bcb7f3e51/
SH256 hash:
05a341a2577c728e8a994775b17b8c5562539146d78a5de948e3534e1ae1c629
MD5 hash:
931254205cd64ad16b18fc9b318e2ca6
SHA1 hash:
4e5c18fcbf06212d952e084b1b455ecc136e4845
Link:
https://www.unpac.me/results/22fa70fb-dc1f-4591-8908-a46bcb7f3e51/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/05a341a2577c/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/05a341a2577c728e8a994775b17b8c5562539146d78a5de948e3534e1ae1c629

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:NETexecutableMicrosoft
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 05a341a2577c728e8a994775b17b8c5562539146d78a5de948e3534e1ae1c629

(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