MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f66e675a6fd9b3b5d49c57fc4f7d07450c6ed7f7bd6ec985fdce5df7bd127cd4. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f66e675a6fd9b3b5d49c57fc4f7d07450c6ed7f7bd6ec985fdce5df7bd127cd4
SHA3-384 hash: df03f1b967b0b61e85df552936d3840dcfe2cac208c69463bec2672e920b55ba3bd2d556ef9ca11b1d9261d9b2c39c21
SHA1 hash: eb8e0d0ccb16a29ff1e914ea6af90b8d17e0b29d
MD5 hash: a272ed84a8f8a8d46c525f5a9598c9c3
humanhash: beryllium-moon-texas-north
File name:Ammu.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:756'504 bytes
First seen:2026-04-16 03:36:00 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 0293eec0b5432ad092f24065016203b2 (21 x GuLoader, 16 x RemcosRAT, 6 x Formbook)
ssdeep 12288:dSW9MrpT34uxqhxw3LX2+iNYeEkypUJYVkNn:dSW9MrpT3kbw3LXj2xypWYKNn
Threatray 2'382 similar samples on MalwareBazaar
TLSH T1BAF45C517670D3AEE6761A39B4CAC32E65547C30AD06038FF1B07E6847B2EAC5F86391
TrID 50.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
10.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
10.5% (.EXE) Win64 Executable (generic) (6522/11/2)
8.1% (.EXE) Win16 NE executable (generic) (5038/12/1)
7.2% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
dhash icon d4d878787024d0c0 (6 x RemcosRAT)
Reporter threatcat_ch
Tags:exe RemcosRAT signed

Code Signing Certificate

Organisation:Minded
Issuer:Minded
Algorithm:sha256WithRSAEncryption
Valid from:2026-03-14T04:54:40Z
Valid to:2027-03-14T04:54:40Z
Serial number: 7db0e236d19864f535e1247cecadfa7c6354d779
Thumbprint Algorithm:SHA256
Thumbprint: 0fb916db8d5d620f6865038935b1d3bc9349bc5c1da083b593c95e63d5fc8185
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
137
Origin country :
CH CH
Vendor Threat Intelligence
Malware configuration found for:
NSIS
Details
Link:
https://research.acce.ciphertechsolutions.com/results/5c796ada-87aa-41af-afaf-ce428e7573c3/
Malware family:
remcos
Create hunting rule
ID:
1
File name:
_f66e675a6fd9b3b5d49c57fc4f7d07450c6ed7f7bd6ec985fdce5df7bd127cd4.exe
Verdict:
Malicious activity
Analysis date:
2026-04-16 03:37:52 UTC
Tags:
auto-reg rat remcos
Link:
https://app.any.run/tasks/e1ad9c83-6a7c-4b60-be9e-d0d6ade6a6c9

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/61815/
Detection(s):
SecuriteInfo.com.FileRepMalware.15663484.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
81.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=69e0594f45787c53e53a2b38
Tags:
injection obfusc blic
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Searching for the window
Creating a file
Delayed reading of the file
Restart of the analyzed sample
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
adaptive-context anti-debug installer installer installer-heuristic microsoft_visual_cc nsis signed smb soft-404
Link:
https://www.filescan.io/uploads/69e05945fd15f1ca1cd02d00/reports/a870d5b4-f549-4d42-bc5a-22aabb46c0a6/overview
Verdict:
Suspicious
Labled as:
Injector.BYI.gen
Link:
https://www.hybrid-analysis.com/sample/f66e675a6fd9b3b5d49c57fc4f7d07450c6ed7f7bd6ec985fdce5df7bd127cd4
Result
Gathering data
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-04-15T22:42:00Z UTC
Last seen:
2026-04-16T00:34:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/f66e675a6fd9b3b5d49c57fc4f7d07450c6ed7f7bd6ec985fdce5df7bd127cd4/results?tab=lookup
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/a30c53f6-b7e3-4826-966d-cd0a05513ad0
Result
Threat name:
Remcos, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1899203
Signature
AI detected suspicious PE digital signature
C2 URLs / IPs found in malware configuration
Creates autostart registry keys with suspicious names
Detected Remcos RAT
Found malware configuration
Malicious sample detected (through community Yara rule)
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)
Unusual module load detection (module proxying)
Yara detected GuLoader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1899203 Sample: Ammu.exe Startdate: 16/04/2026 Architecture: WINDOWS Score: 100 60 drive.usercontent.google.com 2->60 62 drive.google.com 2->62 70 Suricata IDS alerts for network traffic 2->70 72 Found malware configuration 2->72 74 Malicious sample detected (through community Yara rule) 2->74 76 6 other signatures 2->76 10 Ammu.exe 7 46 2->10         started        14 remcos.exe 2->14         started        16 remcos.exe 2->16         started        signatures3 process4 file5 54 C:\Users\user\AppData\Local\...\System.dll, PE32 10->54 dropped 86 Tries to detect virtualization through RDTSC time measurements 10->86 88 Unusual module load detection (module proxying) 10->88 90 Switches to a custom stack to bypass stack traces 10->90 18 Ammu.exe 2 10 10->18         started        23 Ammu.exe 10->23         started        56 C:\Users\user\AppData\Local\...\System.dll, PE32 14->56 dropped 25 remcos.exe 14->25         started        27 remcos.exe 14->27         started        signatures6 process7 dnsIp8 64 drive.usercontent.google.com 142.251.214.97, 443, 49725, 49729 GOOGLEUS United States 18->64 66 drive.google.com 142.251.215.206, 443, 49724, 49728 GOOGLEUS United States 18->66 44 C:\ProgramData\Remcos\remcos.exe, PE32 18->44 dropped 46 C:\ProgramData\...\remcos.exe:Zone.Identifier, ASCII 18->46 dropped 78 Detected Remcos RAT 18->78 80 Creates autostart registry keys with suspicious names 18->80 29 remcos.exe 34 18->29         started        33 Ammu.exe 18->33         started        file9 signatures10 process11 file12 58 C:\Users\user\AppData\Local\...\System.dll, PE32 29->58 dropped 92 Multi AV Scanner detection for dropped file 29->92 94 Tries to detect virtualization through RDTSC time measurements 29->94 96 Unusual module load detection (module proxying) 29->96 98 Switches to a custom stack to bypass stack traces 29->98 35 remcos.exe 29->35         started        40 remcos.exe 29->40         started        signatures13 process14 dnsIp15 68 192.227.135.226, 2404, 49730, 49731 AS-COLOCROSSINGUS United States 35->68 48 C:\Users\user\AppData\...\Login Data.tmp, SQLite 35->48 dropped 50 C:\Users\user\AppData\...\Login Data.tmp, SQLite 35->50 dropped 52 C:\Users\user\...\Login Data For Account.tmp, SQLite 35->52 dropped 82 Detected Remcos RAT 35->82 84 Tries to harvest and steal browser information (history, passwords, etc) 35->84 42 remcos.exe 35->42         started        file16 signatures17 process18
Score:
90%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/f66e675a6fd9b3b5d49c57fc4f7d07450c6ed7f7bd6ec985fdce5df7bd127cd4
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f66e675a6fd9b3b5d49c57fc4f7d07450c6ed7f7bd6ec985fdce5df7bd127cd4/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/f66e675a6fd9b3b5d49c57fc4f7d07450c6ed7f7bd6ec985fdce5df7bd127cd4
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=6zxgowtp3gz3lve4k76e67ihiugg5v7xxvxmtbp5zzo7ppisptka._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
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0eaa4f2b818c69f113d4b98d4840c827c76a407fed4653c5f9b8114c7d815261
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37fb059d66f036d9fcbde38eae1f577e5c214713ed0f2c2ff42f893c3b16e035
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a2238a0f89af592106694a80c7388219a038b46ee3a8f4c241433d126b87befd
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ade9874ddc5fb64c27f3eecddeeabdddb4b62e341e1ec06f09fea29ac9e6baa5
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error
RemcosRAT
f66e675a6fd9b3b5d49c57fc4f7d07450c6ed7f7bd6ec985fdce5df7bd127cd4
RemcosRAT
+ 2'372 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost discovery installer persistence rat spyware stealer
Link:
https://tria.ge/reports/260416-d59v6sez3r/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
NSIS installer
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Adds Run key to start application
Checks installed software on the system
Contacts third-party web service commonly abused for C2
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Reads user/profile data of web browsers
Family: Remcos
Malware Config
C2 Extraction:
192.227.135.226:2404
Unpacked files
SH256 hash:
f66e675a6fd9b3b5d49c57fc4f7d07450c6ed7f7bd6ec985fdce5df7bd127cd4
MD5 hash:
a272ed84a8f8a8d46c525f5a9598c9c3
SHA1 hash:
eb8e0d0ccb16a29ff1e914ea6af90b8d17e0b29d
Link:
https://www.unpac.me/results/41446848-c041-4473-8606-6a9f213931b1/
SH256 hash:
014f1dfeb842cf7265a3644bc6903c592abe9049bfc7396829172d3d72c4d042
MD5 hash:
12b140583e3273ee1f65016becea58c4
SHA1 hash:
92df24d11797fefd2e1f8d29be9dfd67c56c1ada
Link:
https://www.unpac.me/results/41446848-c041-4473-8606-6a9f213931b1/
SH256 hash:
b2699fdfdab6a018fcc972806d12f71972de1861660bb6578935d62b1da06504
MD5 hash:
3cea4c9994912d8f3c3e8b6a814e810e
SHA1 hash:
c48d34a0981d4ab576c7a3ab566f5ddb94af5d86
Link:
https://www.unpac.me/results/41446848-c041-4473-8606-6a9f213931b1/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.52
Link:
https://yomi.yoroi.company/submissions/f66e675a6fd9b3b5d49c57fc4f7d07450c6ed7f7bd6ec985fdce5df7bd127cd4

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:Ins_NSIS_Buer_Nov_2020_1
Create hunting rule
Author:Arkbird_SOLG
Description:Detect NSIS installer used for Buer loader
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:VECT_Ransomware
Create hunting rule
Author:Mustafa Bakhit
Description:Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments.

File information

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

Malspam

RemcosRAT

Executable exe f66e675a6fd9b3b5d49c57fc4f7d07450c6ed7f7bd6ec985fdce5df7bd127cd4

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/61815/

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