MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1c3b3bc408adc792bbc6401c8d304dbaaa34edfe61d8afce2379efbd2b7fbf95. 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: 16


Intelligence 16 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 1c3b3bc408adc792bbc6401c8d304dbaaa34edfe61d8afce2379efbd2b7fbf95
SHA3-384 hash: ada7b5593d8dcd07b899590cee1f6271548ad925f2ac0c2ae343bbb43892c17d9f32b93efdba45420a94d1a06ecfa983
SHA1 hash: f33c768d0fa29dadb1af7ea9776149d3b9a2944c
MD5 hash: e9b7f5ecd93494e4a0481c27f9049055
humanhash: cola-johnny-golf-lamp
File name:APPOINTMENT-LETTER-0002993-00033930-PDF.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:923'248 bytes
First seen:2025-08-27 07:05:19 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 46ce5c12b293febbeb513b196aa7f843 (12 x GuLoader, 5 x VIPKeylogger, 3 x LummaStealer)
ssdeep 24576:l4zL9eKZtc8fluDX7AaGOyrE0QtmMDYRYRmWajIk+GruMPfZuW:izL93Zy0uf4rEJbrRmn+wuMPfZuW
TLSH T1291523106FD5D84BE0901E71867387736BA2BE506B3587C79F04EFA07EE3A109C692E5
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
Reporter threatcat_ch
Tags:exe RemcosRAT signed

Code Signing Certificate

Organisation:gangtunnelen
Issuer:gangtunnelen
Algorithm:sha256WithRSAEncryption
Valid from:2025-07-05T04:17:01Z
Valid to:2026-07-05T04:17:01Z
Serial number: 747583e7d5965e4349043d3337e8626e8315d8c8
Thumbprint Algorithm:SHA256
Thumbprint: f489a8d121d4a3738f8ab9c6d24e383904a3dbf38a1fa3c94aad3a840ca6c638
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
92
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
APPOINTMENT-LETTER-0002993-00033930-PDF.exe
Verdict:
Malicious activity
Analysis date:
2025-08-27 07:06:13 UTC
Tags:
remcos rat remote
Link:
https://app.any.run/tasks/92a3d4d2-7bf8-4738-a78a-f7473e462f4b

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/23780/
Verdict:
Malicious
Score:
93.3%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68aeae5aeb163e0ec182d3b7
Tags:
injection obfusc virus
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Searching for the window
Creating a file in the %AppData% subdirectories
Launching a process
Using the Windows Management Instrumentation requests
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
installer microsoft_visual_cc obfuscated overlay packed packed packer_detected signed
Link:
https://www.filescan.io/uploads/68aeae584a87ed79676d75b1/reports/75256473-c0c2-48a9-965a-ed8a45a4627f/overview
Verdict:
Malicious
Labled as:
Malware_49.2
Link:
https://www.hybrid-analysis.com/sample/1c3b3bc408adc792bbc6401c8d304dbaaa34edfe61d8afce2379efbd2b7fbf95
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-08-26T23:50:00Z UTC
Last seen:
2025-08-26T23:50:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/1c3b3bc408adc792bbc6401c8d304dbaaa34edfe61d8afce2379efbd2b7fbf95/results?tab=lookup
Malware family:
WinEdt Team
Create hunting rule
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/799d597c-be4e-4619-807f-157bee1d4615
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1765956
Signature
AI detected suspicious PE digital signature
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Detected Remcos RAT
Early bird code injection technique detected
Found hidden mapped module (file has been removed from disk)
Found malware configuration
Found suspicious powershell code related to unpacking or dynamic code loading
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
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
Queues an APC in another process (thread injection)
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 WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1765956 Sample: APPOINTMENT-LETTER-0002993-... Startdate: 27/08/2025 Architecture: WINDOWS Score: 100 41 geoplugin.net 2->41 43 drive.usercontent.google.com 2->43 45 drive.google.com 2->45 61 Suricata IDS alerts for network traffic 2->61 63 Found malware configuration 2->63 65 Antivirus detection for dropped file 2->65 67 8 other signatures 2->67 9 APPOINTMENT-LETTER-0002993-00033930-PDF.exe 2 23 2->9         started        signatures3 process4 process5 11 powershell.exe 30 9->11         started        file6 37 APPOINTMENT-LETTER...93-00033930-PDF.exe, PE32 11->37 dropped 39 APPOINTMENT-LETTER...exe:Zone.Identifier, ASCII 11->39 dropped 77 Early bird code injection technique detected 11->77 79 Writes to foreign memory regions 11->79 81 Found suspicious powershell code related to unpacking or dynamic code loading 11->81 83 3 other signatures 11->83 15 msiexec.exe 4 16 11->15         started        20 conhost.exe 11->20         started        signatures7 process8 dnsIp9 47 160.25.72.95, 2404, 49696, 49697 GIGAINFRASoftbankBBCorpJP unknown 15->47 49 drive.usercontent.google.com 142.250.80.97, 443, 49695 GOOGLEUS United States 15->49 51 2 other IPs or domains 15->51 31 C:\Users\user\AppData\Local\Temp\TH87A8.tmp, MS-DOS 15->31 dropped 33 C:\Users\user\AppData\Local\Temp\TH8769.tmp, MS-DOS 15->33 dropped 35 C:\Users\user\AppData\Local\Temp\TH8749.tmp, PE32 15->35 dropped 53 Detected Remcos RAT 15->53 55 Writes to foreign memory regions 15->55 57 Found hidden mapped module (file has been removed from disk) 15->57 59 Maps a DLL or memory area into another process 15->59 22 RmClient.exe 14 15->22         started        25 RmClient.exe 1 15->25         started        27 RmClient.exe 1 15->27         started        29 RmClient.exe 15->29         started        file10 signatures11 process12 signatures13 69 Tries to steal Mail credentials (via file registry) 22->69 71 Tries to harvest and steal browser information (history, passwords, etc) 22->71 73 Tries to steal Instant Messenger accounts or passwords 25->73 75 Tries to steal Mail credentials (via file / registry access) 25->75
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/1c3b3bc408adc792bbc6401c8d304dbaaa34edfe61d8afce2379efbd2b7fbf95
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/1c3b3bc408adc792bbc6401c8d304dbaaa34edfe61d8afce2379efbd2b7fbf95/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2025-08-27 03:06:35 UTC
File Type:
PE (Exe)
Extracted files:
10
AV detection:
22 of 38 (57.89%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=dq5txraivxdzfo6giaoi2mcnxkvdj3p6mhmk7trdphx32k37x6kq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:guloader family:remcos defense_evasion discovery downloader execution rat
Link:
https://tria.ge/reports/250827-hws9aawzfw/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: PowerShell
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Badlisted process makes network request
Legitimate hosting services abused for malware hosting/C2
Modifies trusted root certificate store through registry
Guloader family
Guloader,Cloudeye
Remcos
Remcos family
Malware Config
C2 Extraction:
160.25.72.95:2404
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/649db266-fe1f-4113-8b97-910fc197150c
Unpacked files
SH256 hash:
1c3b3bc408adc792bbc6401c8d304dbaaa34edfe61d8afce2379efbd2b7fbf95
MD5 hash:
e9b7f5ecd93494e4a0481c27f9049055
SHA1 hash:
f33c768d0fa29dadb1af7ea9776149d3b9a2944c
Link:
https://www.unpac.me/results/9cc17f8f-6c29-483a-bb80-28f730fd3edd/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/1c3b3bc408ad/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/1c3b3bc408adc792bbc6401c8d304dbaaa34edfe61d8afce2379efbd2b7fbf95

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: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
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 1c3b3bc408adc792bbc6401c8d304dbaaa34edfe61d8afce2379efbd2b7fbf95

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/23780/

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