MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87. 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: 18


Intelligence 18 IOCs YARA 7 File information Comments
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SHA256 hash: 4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87
SHA3-384 hash: e45cc8c351239627fe44ab87c6cee6ec9b5028611f9aa1cf7857e4c23b8436df43550d022c3e90114068806fc0cbeede
SHA1 hash: 8cb39de97c36eb8328436ffe21be24742925e652
MD5 hash: b7b504ea022610fe69940fd54fd2bc27
humanhash: music-triple-angel-chicken
File name:FAT6789098700900.scr
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:877'056 bytes
First seen:2024-12-03 00:53:52 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:KdeRzboLmkwWQ6Q2l/4SPTIXkORnLeV35YryHC:CyO37l5TkzRLePYryHC
Threatray 1'016 similar samples on MalwareBazaar
TLSH T19A15F111A3E8E689E5FB0B7FD9B4D6560B3EBA4E8D66D34D6297C4FD0097780C148322
TrID 35.4% (.EXE) Win64 Executable (generic) (10522/11/4)
22.1% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
15.1% (.EXE) Win32 Executable (generic) (4504/4/1)
6.9% (.ICL) Windows Icons Library (generic) (2059/9)
6.8% (.EXE) OS/2 Executable (generic) (2029/13)
Magika pebin
Reporter threatcat_ch
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
482
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
FAT6789098700900.scr
Verdict:
Malicious activity
Analysis date:
2024-12-03 00:55:02 UTC
Tags:
rat remcos evasion stealer mpress
Link:
https://app.any.run/tasks/7d19a5f0-a1d0-442f-a418-fb54ff747dd3

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.MalwareX-gen.5549.7631.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=674e582504c232bff3b63210
Tags:
autorun remcos gumen lien
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Launching a process
Unauthorized injection to a recently created process
Restart of the analyzed sample
Сreating synchronization primitives
Setting a keyboard event handler
Connection attempt
Sending a custom TCP request
DNS request
Sending an HTTP GET request
Reading critical registry keys
Creating a file
Creating a file in the %temp% directory
Stealing user critical data
Enabling autorun by creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
crypto dotnet hacktool lolbin masquerade obfuscated packed packed packer_detected remcos
Link:
https://www.filescan.io/uploads/674e56aac14b5f71b2f5d542/reports/19e2f898-6ef3-47c9-8df3-c8b7aeaca720/overview
Verdict:
Malicious
Labled as:
Trojan.GenericS
Link:
https://www.hybrid-analysis.com/sample/4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87
Malware family:
REMCOS
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/eaf8413f-3714-4bbe-ac1c-f383291f5d7c
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.spre.phis.troj.adwa.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1567061
Signature
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
AI detected suspicious sample
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
Contains functionality to inject code into remote processes
Contains functionality to register a low level keyboard hook
Contains functionalty to change the wallpaper
Creates executable files without a name
Delayed program exit found
Detected Remcos RAT
Drops PE files to the startup folder
Found malware configuration
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 dropped file
Multi AV Scanner detection for submitted file
Powershell drops PE file
Sigma detected: Copy file to startup via Powershell
Sigma detected: Remcos
Suricata IDS alerts for network traffic
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)
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: 1567061 Sample: FAT6789098700900.scr.exe Startdate: 03/12/2024 Architecture: WINDOWS Score: 100 52 geoplugin.net 2->52 68 Suricata IDS alerts for network traffic 2->68 70 Found malware configuration 2->70 72 Malicious sample detected (through community Yara rule) 2->72 74 18 other signatures 2->74 8 .exe 2 2->8         started        10 FAT6789098700900.scr.exe 2 2->10         started        13 svchost.exe 1 1 2->13         started        signatures3 process4 dnsIp5 16 .exe 3 16 8->16         started        21 powershell.exe 11 8->21         started        76 Bypasses PowerShell execution policy 10->76 23 powershell.exe 13 10->23         started        25 FAT6789098700900.scr.exe 10->25         started        54 127.0.0.1 unknown unknown 13->54 signatures6 process7 dnsIp8 48 192.210.150.26, 49742, 49744, 8787 AS-COLOCROSSINGUS United States 16->48 50 geoplugin.net 178.237.33.50, 49745, 80 ATOM86-ASATOM86NL Netherlands 16->50 42 C:\ProgramData\remcos\logs.dat, data 16->42 dropped 56 Detected Remcos RAT 16->56 58 Maps a DLL or memory area into another process 16->58 60 Installs a global keyboard hook 16->60 27 .exe 16->27         started        30 .exe 16->30         started        32 .exe 16->32         started        40 2 other processes 16->40 34 conhost.exe 21->34         started        44 C:\Users\user\AppData\Roaming\...\.exe, PE32 23->44 dropped 46 C:\Users\user\...\.exe:Zone.Identifier, ASCII 23->46 dropped 62 Creates executable files without a name 23->62 64 Drops PE files to the startup folder 23->64 66 Powershell drops PE file 23->66 36 conhost.exe 23->36         started        38 WerFault.exe 21 16 25->38         started        file9 signatures10 process11 signatures12 78 Tries to steal Instant Messenger accounts or passwords 27->78 80 Tries to steal Mail credentials (via file / registry access) 27->80 82 Tries to harvest and steal browser information (history, passwords, etc) 30->82
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87/
Threat name:
Win32.Trojan.Remcos
Create hunting rule
Status:
Malicious
First seen:
2024-12-02 09:31:31 UTC
File Type:
PE (.Net Exe)
Extracted files:
5
AV detection:
21 of 38 (55.26%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=jrn6uh5f7bkh3yvahrqrpyikai6xn3obpx4shrpyamn7u5hbf2dq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
admintool_mailpassview
Create hunting rule
nirsoft
Create hunting rule
Similar samples:
27e9d8399b11830c69e45b1d2f37dbde869ff3ec1185ea640c209399fb1d737b
RemcosRAT
37749c2d24301276a9b1a9d1b39ab49c3037dd9ed6f1f90e895658a5d0ada16f
RemcosRAT
552c5a019f7e7f260e599ccb6a3be509b0a62739547d0d5250288fbdf4569cf5
RemcosRAT
79c7358a9ac82f4d547e027ec64b8a9854ef445ff7d1e85a2b39c0e60bc00c99
RemcosRAT
aea9253a5f1a4e0f59325f84c015b3980a1573e1873643fce09e084a76e0047b
RemcosRAT
e9572c9f7e9e395025837bce834ffa5694f39e7c7646b7a309bad4efe31aedaf
RemcosRAT
error
RemcosRAT
+ 1'006 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost collection discovery execution rat spyware stealer
Link:
https://tria.ge/reports/241203-a87nfaxmfm/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: PowerShell
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Drops startup file
Reads user/profile data of web browsers
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Remcos
Remcos family
Malware Config
C2 Extraction:
192.210.150.26:8787
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/9e11aa4f-bee2-4756-808d-9a424654fc9a
Unpacked files
SH256 hash:
9c4882adfa17ec028c25dcaf26fd4ee7bfa32d9774002855e0751bd2714ed91d
MD5 hash:
13f1e382a5c234586c9cce829216588f
SHA1 hash:
fe19f5b66aa9cb94a7a8c01fb1e63a9a18793654
Link:
https://www.unpac.me/results/837e9327-365e-44d6-83a9-e77ccd24b51a/
SH256 hash:
45c7b64a55dca23ee1239649e03a7c361813dbcfc2a0817b0d8e94c907d6ed4b
MD5 hash:
fb1bc19121c4e190d83672bc71b493f0
SHA1 hash:
c3488b969ba578e28ee360be24b6416425a224a0
Link:
https://www.unpac.me/results/837e9327-365e-44d6-83a9-e77ccd24b51a/
SH256 hash:
665cecbb82e0047fbfce4f8f09bea69415715f87be95b6721ba09ad10b531fea
MD5 hash:
e524310a02dfe470f2f9ad81fa30fd57
SHA1 hash:
5442b037e5aa5c965bdefcf9f0d5381d72013c44
Detections:
malware_windows_remcos_rat
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
win_remcos_rat_unpacked
Create hunting rule
Link:
https://www.unpac.me/results/837e9327-365e-44d6-83a9-e77ccd24b51a/
Parent samples :
4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87
49e8a1f12fb5202470604efe01c0d60949d20d302a76aed85b2a049e91266366
e51f50b3f520e3de0f0916e0291ad093aa0c50f6c81010001ce5aa2aee88f7b0
28331e2705bf58bd76a9f8ba0f0a431b762eaf6e4284dbf12f1453dd3fecf281
8c5312bbccde4babcfbcb4d079b6063cf023777affca10a479891833925d4118
4108277feb47e70ea76dea706b8a8e7ed1dc94575c1ed200e78073b4d97185a2
9c1047801b38650382f68beedae4bcbd47bba142abad7405cac530f4e09f47ee
199ab84d301b4914a7eb23a40a575e2622928e58d3672da79e43c77e453c4a3d
SH256 hash:
4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87
MD5 hash:
b7b504ea022610fe69940fd54fd2bc27
SHA1 hash:
8cb39de97c36eb8328436ffe21be24742925e652
Link:
https://www.unpac.me/results/837e9327-365e-44d6-83a9-e77ccd24b51a/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4c5bea1fa5f8/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
iSpy Keylogger
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87

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:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:RansomPyShield_Antiransomware
Create hunting rule
Author:XiAnzheng
Description:Check for Suspicious String and Import combination that Ransomware mostly abuse(can create FP)
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

File information

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

Malspam

RemcosRAT

Executable exe 4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87

(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

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