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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b77ed7438b345a429533f19323007a167c0de39d3ff71f7b46bc07a94d2a8ed4. 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: 15


Intelligence 15 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b77ed7438b345a429533f19323007a167c0de39d3ff71f7b46bc07a94d2a8ed4
SHA3-384 hash: 19a35f0996398d154ebdc70a208faa6beb5f96bfbd77d524e5c31e8cabfd2fe3c4d603fbc65aac6b5b4c73b97d411a5a
SHA1 hash: 9e5617c0cefe0a4729581ea79f0fc09b2eeb112f
MD5 hash: 046e7d9c32af5bfdc289ccdbd93df50b
humanhash: wyoming-minnesota-oklahoma-jersey
File name:2801026.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:467'944 bytes
First seen:2026-01-29 08:12:47 UTC
Last seen:2026-01-29 08:35:14 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 6e7f9a29f2c85394521a08b9f31f6275 (326 x GuLoader, 65 x AgentTesla, 63 x RemcosRAT)
ssdeep 6144:RMm4CCOkXvVPZCvwriZs10D9+RTDHTYTwB2f7EnYoj1vNBecvay1VnCi8hNFlq2w:RMwtn9q1S+1TqUYojrB1a88PFlq2khB
TLSH T147A4CFBDFE1CE4E1D016437538366825FB69DF26E0B8462EB9B8721819326CB2417D4F
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10522/11/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
dhash icon b8f4727478ce86e6 (5 x GuLoader, 3 x RemcosRAT)
Reporter lowmal3
Tags:exe RemcosRAT signed

Code Signing Certificate

Organisation:Drggendes
Issuer:Drggendes
Algorithm:sha256WithRSAEncryption
Valid from:2025-12-28T01:47:30Z
Valid to:2026-12-28T01:47:30Z
Serial number: 43712cca00d4f508f853ac280674c1af3007da0e
Thumbprint Algorithm:SHA256
Thumbprint: 13cf402cfa43b529d150305ffc32e186a17cae4561bc78f388212b2ff21029d4
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
3
# of downloads :
161
Origin country :
DE DE
Vendor Threat Intelligence
Malware configuration found for:
GuLoader NSIS
Details
GuLoader
a c2 URL, a useragent string, and a string XOR key
GuLoader
an XOR decryption key and an extracted component
NSIS
extracted archive contents
Link:
https://research.acce.ciphertechsolutions.com/results/582a47c9-4935-4704-9ae1-e72a91c99e65/
Malware family:
remcos
Create hunting rule
ID:
1
File name:
4ace1a92a1389eecdd494abd25d1bd6a8d16568364c387c68cec269bb844f320.zip
Verdict:
Malicious activity
Analysis date:
2026-01-29 01:55:29 UTC
Tags:
arch-exec remcos rat auto-reg
Link:
https://app.any.run/tasks/6719518e-0284-4592-88e6-5b9dba271cb7

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/50620/
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=697abe106fa3eed165300db0
Tags:
injection virus blic
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
adaptive-context anti-debug blackhole guloader installer installer installer-heuristic microsoft_visual_cc nsis signed soft-404
Link:
https://www.filescan.io/uploads/697b16a312c4ad8c08597f3b/reports/0a7d5ad3-74f0-4402-a5ef-521cce72feb6/overview
Verdict:
Malicious
Labled as:
Malware_52.7
Link:
https://www.hybrid-analysis.com/sample/b77ed7438b345a429533f19323007a167c0de39d3ff71f7b46bc07a94d2a8ed4
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-01-28T21:00:00Z UTC
Last seen:
2026-01-31T05:58:00Z UTC
Hits:
~1000
Detections:
UDS:DangerousObject.Multi.Generic HEUR:Trojan.Win32.Makoob.gen Trojan.NSIS.Makoob.sba Backdoor.Win32.Remcos.sb VHO:Trojan.Win32.GuLoader.gen Trojan-Downloader.Win32.Minix.sb Trojan.Win32.Guloader.sb Trojan.NSIS.Makoob.sbe Trojan.NSIS.Makoob.sbb
Link:
https://opentip.kaspersky.com/b77ed7438b345a429533f19323007a167c0de39d3ff71f7b46bc07a94d2a8ed4/results?tab=lookup
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/ab8e6978-be89-4bd2-b947-3891486d7e87
Result
Threat name:
GuLoader, Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.evad.phis.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1859592
Signature
AI detected suspicious PE digital signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Creates autostart registry keys with suspicious names
Detected Remcos RAT
Found direct / indirect Syscall (likely to bypass EDR)
Found hidden mapped module (file has been removed from disk)
Found malware configuration
Joe Sandbox ML detected suspicious sample
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
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
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)
Unusual module load detection (module proxying)
Writes to foreign memory regions
Yara detected GuLoader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1859592 Sample: 2801026.exe Startdate: 29/01/2026 Architecture: WINDOWS Score: 100 81 drive.usercontent.google.com 2->81 83 drive.google.com 2->83 91 Suricata IDS alerts for network traffic 2->91 93 Found malware configuration 2->93 95 Antivirus detection for dropped file 2->95 97 9 other signatures 2->97 10 2801026.exe 3 33 2->10         started        14 remcos.exe 2->14         started        16 remcos.exe 2->16         started        18 rundll32.exe 2->18         started        signatures3 process4 file5 67 C:\Users\user\AppData\Local\...\System.dll, PE32 10->67 dropped 69 C:\Users\user\AppData\Local\...\Fv.Bes, data 10->69 dropped 121 Tries to detect virtualization through RDTSC time measurements 10->121 123 Unusual module load detection (module proxying) 10->123 125 Switches to a custom stack to bypass stack traces 10->125 20 2801026.exe 2 10 10->20         started        25 2801026.exe 10->25         started        71 C:\Users\user\AppData\Local\...\System.dll, PE32 14->71 dropped 127 Found direct / indirect Syscall (likely to bypass EDR) 14->127 27 remcos.exe 14->27         started        29 remcos.exe 14->29         started        73 C:\Users\user\AppData\Local\...\System.dll, PE32 16->73 dropped 31 remcos.exe 16->31         started        33 remcos.exe 16->33         started        signatures6 process7 dnsIp8 85 drive.usercontent.google.com 142.250.64.97, 443, 49742, 49745 GOOGLEUS United States 20->85 87 drive.google.com 142.251.40.142, 443, 49741, 49744 GOOGLEUS United States 20->87 63 C:\ProgramData\Remcos\remcos.exe, PE32 20->63 dropped 65 C:\ProgramData\...\remcos.exe:Zone.Identifier, ASCII 20->65 dropped 115 Detected Remcos RAT 20->115 117 Creates autostart registry keys with suspicious names 20->117 35 remcos.exe 23 20->35         started        39 2801026.exe 20->39         started        119 Found direct / indirect Syscall (likely to bypass EDR) 27->119 41 remcos.exe 27->41         started        43 remcos.exe 31->43         started        file9 signatures10 process11 file12 61 C:\Users\user\AppData\Local\...\System.dll, PE32 35->61 dropped 99 Antivirus detection for dropped file 35->99 101 Multi AV Scanner detection for dropped file 35->101 103 Found hidden mapped module (file has been removed from disk) 35->103 105 4 other signatures 35->105 45 remcos.exe 4 10 35->45         started        50 remcos.exe 35->50         started        signatures13 process14 dnsIp15 89 130.12.182.224, 2404, 49746, 49748 DATAHOPDatahop-SixDegreesGB Canada 45->89 75 C:\Users\user\AppData\Local\Temp\TH1165.tmp, MS-DOS 45->75 dropped 77 C:\Users\user\AppData\Local\Temp\TH1115.tmp, MS-DOS 45->77 dropped 79 C:\Users\user\AppData\Local\Temp\TH10E6.tmp, MS-DOS 45->79 dropped 129 Detected Remcos RAT 45->129 131 Writes to foreign memory regions 45->131 133 Maps a DLL or memory area into another process 45->133 52 RmClient.exe 45->52         started        55 RmClient.exe 45->55         started        57 RmClient.exe 45->57         started        59 2 other processes 45->59 file16 signatures17 process18 signatures19 107 Tries to harvest and steal browser information (history, passwords, etc) 52->107 109 Unusual module load detection (module proxying) 52->109 111 Tries to steal Instant Messenger accounts or passwords 55->111 113 Tries to steal Mail credentials (via file / registry access) 55->113
Score:
98%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b77ed7438b345a429533f19323007a167c0de39d3ff71f7b46bc07a94d2a8ed4
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b77ed7438b345a429533f19323007a167c0de39d3ff71f7b46bc07a94d2a8ed4/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Suspicious
First seen:
2026-01-29 01:55:30 UTC
File Type:
PE (Exe)
Extracted files:
5
AV detection:
12 of 24 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=w57noq4lgrneffjt6gjsgad2cz6a3y45h73r662gxqd2stjkr3ka._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:guloader family:remcos botnet:remotehost collection discovery downloader persistence rat
Link:
https://tria.ge/reports/260129-j4mbdabt5g/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Adds Run key to start application
Contacts third-party web service commonly abused for C2
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Detected Nirsoft tools
NirSoft MailPassView
Guloader family
Guloader,Cloudeye
Remcos
Remcos family
Malware Config
C2 Extraction:
130.12.182.224:2404
Unpacked files
SH256 hash:
b77ed7438b345a429533f19323007a167c0de39d3ff71f7b46bc07a94d2a8ed4
MD5 hash:
046e7d9c32af5bfdc289ccdbd93df50b
SHA1 hash:
9e5617c0cefe0a4729581ea79f0fc09b2eeb112f
Link:
https://www.unpac.me/results/ec9af68a-49ed-4d35-84e1-eec0f1b11e55/
SH256 hash:
acf90ab6f4edc687e94aaf604d05e16e6cfb5e35873783b50c66f307a35c6506
MD5 hash:
6e55a6e7c3fdbd244042eb15cb1ec739
SHA1 hash:
070ea80e2192abc42f358d47b276990b5fa285a9
Link:
https://www.unpac.me/results/ec9af68a-49ed-4d35-84e1-eec0f1b11e55/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b77ed7438b34/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/b77ed7438b345a429533f19323007a167c0de39d3ff71f7b46bc07a94d2a8ed4

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:Detect_NSIS_Nullsoft_Installer
Create hunting rule
Author:Obscurity Labs LLC
Description:Detects NSIS installers by .ndata section + NSIS header string
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits

File information

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

Malspam

RemcosRAT

Executable exe b77ed7438b345a429533f19323007a167c0de39d3ff71f7b46bc07a94d2a8ed4

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/50620/

Comments