MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4e1899294fcd9043ed50cb9f02a7085b4c243deb30e3c2d5bdaeac2569fe0e6e. 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: 20


Intelligence 20 IOCs YARA 16 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4e1899294fcd9043ed50cb9f02a7085b4c243deb30e3c2d5bdaeac2569fe0e6e
SHA3-384 hash: 3e556cf2f8536339c5aaaab98e649e44890282dff577345691b46903d0076fa2fd9afb498efaa20222cfc4efe9d3d7f0
SHA1 hash: 96efd40a135165d2acd001b94260ca7f8eeb798a
MD5 hash: 1f8592e9abe87ea5cc2f6c302e100819
humanhash: quiet-carbon-lion-july
File name:SKM-2752024.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'028'096 bytes
First seen:2024-05-27 12:13:11 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'658 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:Ahyf9ZdV4g0lR9xR6q2Bu5lC/CjZBTFa/+O:AhylZsg0vk5kY8ZBTFa2O
Threatray 4'141 similar samples on MalwareBazaar
TLSH T1EA2522067358AF00ED39ABF1987872D5A7BAB03A2470FE0D9DD674CC49BAF106651327
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 00d0d070d0607000 (6 x AgentTesla, 6 x Formbook, 1 x RemcosRAT)
Reporter threatcat_ch
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
436
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
4e1899294fcd9043ed50cb9f02a7085b4c243deb30e3c2d5bdaeac2569fe0e6e.exe
Verdict:
Malicious activity
Analysis date:
2024-05-27 12:13:59 UTC
Tags:
rat remcos remote evasion
Link:
https://app.any.run/tasks/fa270167-67dd-4113-a8bc-b6ab33933f67

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6654791c121317197511fe8fwin7simulatehigh_evasion
Tags:
Banker Encryption Execution Network Stealth Heur Dexter
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Сreating synchronization primitives
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
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:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/66547910c062667a2240d1fa/reports/2a348d46-7de6-4cc2-90ea-71b99379225a/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/4e1899294fcd9043ed50cb9f02a7085b4c243deb30e3c2d5bdaeac2569fe0e6e
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/6accf0f6-e018-486a-b532-348c258fc6e7
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1448014
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
AI detected suspicious sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Detected Remcos RAT
Found malware configuration
Injects a PE file into a foreign processes
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
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1448014 Sample: SKM-2752024.exe Startdate: 27/05/2024 Architecture: WINDOWS Score: 100 38 geoplugin.net 2->38 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 11 other signatures 2->50 8 SKM-2752024.exe 7 2->8         started        12 TqcSXSH.exe 5 2->12         started        signatures3 process4 file5 34 C:\Users\user\AppData\Roaming\TqcSXSH.exe, PE32 8->34 dropped 36 C:\Users\user\AppData\Local\...\tmp2E07.tmp, XML 8->36 dropped 52 Uses schtasks.exe or at.exe to add and modify task schedules 8->52 54 Adds a directory exclusion to Windows Defender 8->54 56 Injects a PE file into a foreign processes 8->56 14 SKM-2752024.exe 2 13 8->14         started        18 powershell.exe 23 8->18         started        20 schtasks.exe 1 8->20         started        58 Multi AV Scanner detection for dropped file 12->58 60 Machine Learning detection for dropped file 12->60 22 TqcSXSH.exe 12->22         started        24 schtasks.exe 1 12->24         started        signatures6 process7 dnsIp8 40 103.150.8.12, 49733, 5689 XTOM-AS-JPxTomJP unknown 14->40 42 geoplugin.net 178.237.33.50, 49735, 80 ATOM86-ASATOM86NL Netherlands 14->42 62 Detected Remcos RAT 14->62 64 Loading BitLocker PowerShell Module 18->64 26 WmiPrvSE.exe 18->26         started        28 conhost.exe 18->28         started        30 conhost.exe 20->30         started        32 conhost.exe 24->32         started        signatures9 process10
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4e1899294fcd9043ed50cb9f02a7085b4c243deb30e3c2d5bdaeac2569fe0e6e
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4e1899294fcd9043ed50cb9f02a7085b4c243deb30e3c2d5bdaeac2569fe0e6e/
Threat name:
ByteCode-MSIL.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2024-05-27 10:36:53 UTC
File Type:
PE (.Net Exe)
Extracted files:
24
AV detection:
18 of 24 (75.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=jymjskkpzwieh3kqzopqfjyilngcipplgdr4fvn5v2wck2p6bzxa._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
27721c56187587669e9037d4c7379dade8d197db2be2c85bb56176f4e5834e63
RemcosRAT
40a32c20b9e9576ce7f8d4342ad24b9f9aa0805bdc43aa781bc3b2626287d740
RemcosRAT
47fef22842a3bd3769c9c78461cf85cc940167e58f96bccac4870e9acaae0159
RemcosRAT
963c914d288dcc6fd4be76a109feecfe6ade32cb802ef799affed99c39f7185f
RemcosRAT
+ 4'131 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:76364 execution rat
Link:
https://tria.ge/reports/240527-pea5psbd3s/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Remcos
Malware Config
C2 Extraction:
103.150.8.12:5689
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/5117f740-a571-4d45-ac8c-bcfe6b1e6500
Unpacked files
SH256 hash:
069f47985f724b566c83e7eb437c354061660a8b6968c425cc9b4733ba6c74e2
MD5 hash:
890c477349c232c5ab2c8aa2d6f64545
SHA1 hash:
ea26dbbfa464c1094d50c4ea5be2eb6619be563f
Link:
https://www.unpac.me/results/921cee37-06ff-4df4-a18f-e472ecad4007/
SH256 hash:
f80ef6d3aba9cc2a3f1b369285a32be4b48b614fc5d5b2e92168e45fda3a7971
MD5 hash:
0cf0b5052eee16711e158e1d4d75c380
SHA1 hash:
bf5408a8ab921779b70c33380aeb6487522b6928
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_EventViewer
Create hunting rule
Link:
https://www.unpac.me/results/921cee37-06ff-4df4-a18f-e472ecad4007/
Parent samples :
e0d74fa44286f3a4c4c4c2fc151a339f487c2af644fb9691016dcf057b3bd343
47fef22842a3bd3769c9c78461cf85cc940167e58f96bccac4870e9acaae0159
b1801e102f5cb5dce9e2628bd80932a39bd57ff68d32c824ad4443f7bd00ea2d
f80ef6d3aba9cc2a3f1b369285a32be4b48b614fc5d5b2e92168e45fda3a7971
70029840a2c10f707e5b6bee6a48c4c7fb1fc3efe79215d7bb01c5e2967848cb
4e1899294fcd9043ed50cb9f02a7085b4c243deb30e3c2d5bdaeac2569fe0e6e
747ea71ee4743ed14b66b6a88371819a04350632aeb3ed66e4d40ec53a9ba5ec
ea838ad000acd44a3a8abc21a9e131f32ecd9a197383782b516dda22d6047105
effb59e562e566570fbd4dc5df959dd14ad9f0a181b65189644fdfe9425692a4
caeb39e11b7af2a2c1cc8d0eb89886f570246d95e366aac9f153d9e1441297dc
SH256 hash:
1a1de9f3fe4c3a7ea7cd547cdd9d78b3873d6e243e544e5bb647452d6d9f6cfe
MD5 hash:
ceb52a5c98659e8905ea76737fe00c01
SHA1 hash:
bb7b30ff84d6aa26eaa0021c9fa3cd2c5a08e694
Link:
https://www.unpac.me/results/921cee37-06ff-4df4-a18f-e472ecad4007/
SH256 hash:
32c209f2a6369f5bd203a36263a9c243947f0e61da9ef0de068ad1117a9108f0
MD5 hash:
8d1fa59e56a1e6a12aa52f40c4890050
SHA1 hash:
2064eb9d04cb6ca22390df04ec7c214a5642b3ae
Link:
https://www.unpac.me/results/921cee37-06ff-4df4-a18f-e472ecad4007/
SH256 hash:
4e1899294fcd9043ed50cb9f02a7085b4c243deb30e3c2d5bdaeac2569fe0e6e
MD5 hash:
1f8592e9abe87ea5cc2f6c302e100819
SHA1 hash:
96efd40a135165d2acd001b94260ca7f8eeb798a
Link:
https://www.unpac.me/results/921cee37-06ff-4df4-a18f-e472ecad4007/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4e1899294fcd/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/4e1899294fcd9043ed50cb9f02a7085b4c243deb30e3c2d5bdaeac2569fe0e6e

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:iexplorer_remcos
Create hunting rule
Author:iam-py-test
Description:Detect iexplorer being taken over by Remcos
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
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_rat_unpacked
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
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 4e1899294fcd9043ed50cb9f02a7085b4c243deb30e3c2d5bdaeac2569fe0e6e

(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