MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4b052c0a60681008a7ebd4b9797badf24129a8710c0ec56fe560c14c61c44f79. 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 14 File information Comments
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SHA256 hash: 4b052c0a60681008a7ebd4b9797badf24129a8710c0ec56fe560c14c61c44f79
SHA3-384 hash: 19377337a3d0ffb022c959573ce22d1d8eea3d159ddc6265d9f4def0d9152610a29c9c6c340ca01ebdb4fbab5b190848
SHA1 hash: d5ff7d6eb1bd95ded17ec03ce532535a49592caa
MD5 hash: f5365ce5007ae68fd1dc7cd454b35b05
humanhash: leopard-london-bluebird-nine
File name:libcef.dll
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:4'413'440 bytes
First seen:2025-08-28 13:50:48 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 7d55bce71f04e2295549851ae8e8438c (1 x RemcosRAT, 1 x VIPKeylogger)
ssdeep 98304:sONQcVPQwswlYYyBPNHB5zBzy71xRsTkQ8:s0QqPQHA32X5zG
TLSH T18716BD1593A404B5E87BDA38CA59C333D6B07D925730D14F0A98E2061F73EA29B7F726
TrID 48.7% (.EXE) Win64 Executable (generic) (10522/11/4)
23.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
9.3% (.EXE) OS/2 Executable (generic) (2029/13)
9.2% (.EXE) Generic Win/DOS Executable (2002/3)
9.2% (.EXE) DOS Executable Generic (2000/1)
Magika pebin
Reporter lowmal3
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
103
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
libcef.dll
Verdict:
Malicious activity
Analysis date:
2025-08-28 13:52:57 UTC
Tags:
rat remcos stealer mpress
Link:
https://app.any.run/tasks/42e99388-1b59-4eee-8290-23ac9e9705f3

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/24041/
Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68b05ec0eb163e0ec182fe92
Tags:
emotet remcos
Result
Verdict:
Clean
Maliciousness:
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
adaptive-context crypto fingerprint masquerade microsoft_visual_cc packed remcos
Link:
https://www.filescan.io/uploads/68b05ebc8d7e23876184434c/reports/d9cd455b-24b6-4967-858a-22795718265d/overview
Verdict:
Malicious
Labled as:
Win64/Kryptik.FLP trojan
Link:
https://www.hybrid-analysis.com/sample/4b052c0a60681008a7ebd4b9797badf24129a8710c0ec56fe560c14c61c44f79
Verdict:
Malicious
File Type:
dll x64
First seen:
2025-08-27T22:54:00Z UTC
Last seen:
2025-08-27T22:54:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/4b052c0a60681008a7ebd4b9797badf24129a8710c0ec56fe560c14c61c44f79/results?tab=lookup
Malware family:
REMCOS
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/4367c6b5-9516-4a83-8f93-c5b2073bb146
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1767012
Signature
Allocates memory in foreign processes
Antivirus detection for dropped file
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
Detected Remcos RAT
Found hidden mapped module (file has been removed from disk)
Found malware configuration
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious 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: 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)
Writes to foreign memory regions
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: 1767012 Sample: libcef.dll.exe Startdate: 28/08/2025 Architecture: WINDOWS Score: 100 60 geoplugin.net 2->60 66 Suricata IDS alerts for network traffic 2->66 68 Found malware configuration 2->68 70 Malicious sample detected (through community Yara rule) 2->70 72 9 other signatures 2->72 9 loaddll64.exe 1 2->9         started        signatures3 process4 process5 11 rundll32.exe 9->11         started        14 cmd.exe 1 9->14         started        16 rundll32.exe 9->16         started        18 9 other processes 9->18 signatures6 98 Writes to foreign memory regions 11->98 100 Allocates memory in foreign processes 11->100 102 Injects a PE file into a foreign processes 11->102 20 aspnet_wp.exe 4 9 11->20         started        25 WerFault.exe 20 16 11->25         started        27 rundll32.exe 14->27         started        29 aspnet_wp.exe 16->29         started        31 WerFault.exe 16 16->31         started        33 aspnet_wp.exe 18->33         started        35 aspnet_wp.exe 18->35         started        37 aspnet_wp.exe 18->37         started        39 4 other processes 18->39 process7 dnsIp8 62 196.251.92.69, 28288, 49712, 49713 Web4AfricaZA Seychelles 20->62 64 geoplugin.net 178.237.33.50, 49714, 80 ATOM86-ASATOM86NL Netherlands 20->64 54 C:\Users\user\AppData\Local\Temp\TH75C6.tmp, MS-DOS 20->54 dropped 56 C:\Users\user\AppData\Local\Temp\TH7577.tmp, MS-DOS 20->56 dropped 58 C:\Users\user\AppData\Local\Temp\TH7557.tmp, PE32 20->58 dropped 74 Contains functionality to bypass UAC (CMSTPLUA) 20->74 76 Detected Remcos RAT 20->76 78 Contains functionalty to change the wallpaper 20->78 86 5 other signatures 20->86 41 RmClient.exe 1 20->41         started        44 RmClient.exe 1 20->44         started        46 RmClient.exe 2 20->46         started        48 RmClient.exe 20->48         started        80 Writes to foreign memory regions 27->80 82 Allocates memory in foreign processes 27->82 84 Injects a PE file into a foreign processes 27->84 50 aspnet_wp.exe 27->50         started        52 WerFault.exe 18 27->52         started        file9 signatures10 process11 signatures12 88 Tries to steal Instant Messenger accounts or passwords 41->88 90 Tries to steal Mail credentials (via file / registry access) 41->90 92 Tries to harvest and steal browser information (history, passwords, etc) 44->92 94 Tries to steal Mail credentials (via file registry) 48->94 96 Detected Remcos RAT 50->96
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4b052c0a60681008a7ebd4b9797badf24129a8710c0ec56fe560c14c61c44f79
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable PDB Path PE (Portable Executable) PE File Layout Win 64 Exe x64
Link:
https://app.malva.re/file/f5365ce5007ae68fd1dc7cd454b35b05
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4b052c0a60681008a7ebd4b9797badf24129a8710c0ec56fe560c14c61c44f79/
Threat name:
Win64.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2025-08-28 03:15:53 UTC
File Type:
PE+ (Dll)
AV detection:
16 of 24 (66.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jmcsyctanaiarj7l2s4xs65n6jastkdrbqhmk37fmdauyyoej54q._file
Verdict:
malicious
Label(s):
nirsoft
Create hunting rule
remcos
Create hunting rule
Similar samples:
error
RemcosRAT
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:enki collection defense_evasion discovery rat trojan
Link:
https://tria.ge/reports/250828-q5plfsgp2t/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Remcos
Remcos family
UAC bypass
Malware Config
C2 Extraction:
196.251.92.69:28288
Verdict:
Unknown
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/7339fc88-ece4-46e9-9f43-f50c480a58f5
Unpacked files
SH256 hash:
4b052c0a60681008a7ebd4b9797badf24129a8710c0ec56fe560c14c61c44f79
MD5 hash:
f5365ce5007ae68fd1dc7cd454b35b05
SHA1 hash:
d5ff7d6eb1bd95ded17ec03ce532535a49592caa
Link:
https://www.unpac.me/results/92a5b2fc-7da1-43d8-899e-fc921a01a0bc/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4b052c0a6068/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/4b052c0a60681008a7ebd4b9797badf24129a8710c0ec56fe560c14c61c44f79

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:CP_AllMal_Detector
Create hunting rule
Author:DiegoAnalytics
Description:CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication
Rule name:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__MemoryWorkingSet
Create hunting rule
Author:Fernando Mercês
Description:Anti-debug process memory working set size check
Reference:http://www.gironsec.com/blog/2015/06/anti-debugger-trick-quicky/
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:Jupyter_infostealer
Create hunting rule
Author:CD_R0M_
Description:Rule for Jupyter Infostealer/Solarmarker malware from september 2021-December 2022
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)
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)
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

File information

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

Malspam

RemcosRAT

Executable exe 4b052c0a60681008a7ebd4b9797badf24129a8710c0ec56fe560c14c61c44f79

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/24041/

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