MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a99b033ba05647d37a7e1e9de591fb6cb27495cd0368a1b165fbf8fde3785e2f. 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 33 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a99b033ba05647d37a7e1e9de591fb6cb27495cd0368a1b165fbf8fde3785e2f
SHA3-384 hash: f0dd4321ada7aeb670f3b4ebb0765eac3ce93b3eee27d47fc27585846e173883b11ea6b034ba2d3a8e8dad31c1748055
SHA1 hash: 5c6d43d7969ffc9a22553e9b4eb0b03ae2889b3d
MD5 hash: 7fa7511894c2792a3709f4e8ef4ec6b4
humanhash: item-indigo-uncle-kilo
File name:New P.O.scr
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'476'096 bytes
First seen:2026-02-16 08:40:59 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
ssdeep 24576:ZZqu2V78UkAL+aJwNTvOAiH7BED9iNPP2ZMDuq11NNIV/D837NxM4bCQ:DeV7ES+aUTmyCFDuqXNNIVb8ZxM4bT
Threatray 120 similar samples on MalwareBazaar
TLSH T172651250371EEC03D8925EB12AB5E3F41BB81E5D9901E383DFEA7EDBB53960428442D2
TrID 33.1% (.EXE) Win64 Executable (generic) (6522/11/2)
25.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
10.4% (.ICL) Windows Icons Library (generic) (2059/9)
10.3% (.EXE) OS/2 Executable (generic) (2029/13)
10.1% (.EXE) Generic Win/DOS Executable (2002/3)
Magika pebin
Reporter lowmal3
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
123
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Malware family:
remcos
Create hunting rule
ID:
1
File name:
f283467b9a160042ad483066dd8d826e4779556bf6e65782b744b4cc2a673632.zip
Verdict:
Malicious activity
Analysis date:
2026-02-16 08:41:30 UTC
Tags:
arch-exec remcos rat auto-sch-xml
Link:
https://app.any.run/tasks/48419006-65da-46ac-9439-04b7658c394f

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/53397/
Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6992d8322715406c647a0991
Tags:
injection stration shell
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a process with a hidden window
Launching a process
Adding an exclusion to Microsoft Defender
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
formbook krypt masquerade packed soft-404 vbnet
Link:
https://www.filescan.io/uploads/6992d82ac9bfb60ece202d44/reports/04683fdb-aec5-4e0d-801e-05303405035a/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/a99b033ba05647d37a7e1e9de591fb6cb27495cd0368a1b165fbf8fde3785e2f
Verdict:
Malicious
File Type:
exe x64
Detections:
Trojan.Win32.Agent.sb Trojan.MSIL.Crypt.sb HEUR:Trojan.MSIL.Taskun.sb UDS:DangerousObject.Multi.Generic Trojan.MSIL.Taskun.sb PDM:Trojan.Win32.Generic HEUR:Trojan-Spy.MSIL.SnakeLogger.gen
Link:
https://opentip.kaspersky.com/a99b033ba05647d37a7e1e9de591fb6cb27495cd0368a1b165fbf8fde3785e2f/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/3f20c436-b68f-4fe9-ba30-cbcfa07246b8
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1869792
Signature
Adds a directory exclusion to Windows Defender
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
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
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Remcos
Sigma detected: Scheduled temp file as task from temp location
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
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)
Unusual module load detection (module proxying)
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1869792 Sample: New P.O.scr.exe Startdate: 16/02/2026 Architecture: WINDOWS Score: 100 67 Suricata IDS alerts for network traffic 2->67 69 Found malware configuration 2->69 71 Malicious sample detected (through community Yara rule) 2->71 73 15 other signatures 2->73 7 New P.O.scr.exe 7 2->7         started        11 FmtqwKZIDwW.exe 5 2->11         started        process3 file4 47 C:\Users\user\AppData\...\FmtqwKZIDwW.exe, PE32+ 7->47 dropped 49 C:\Users\...\FmtqwKZIDwW.exe:Zone.Identifier, ASCII 7->49 dropped 51 C:\Users\user\AppData\Local\...\tmp55E6.tmp, XML 7->51 dropped 53 C:\Users\user\AppData\...53ew P.O.scr.exe.log, CSV 7->53 dropped 75 Modifies the context of a thread in another process (thread injection) 7->75 77 Adds a directory exclusion to Windows Defender 7->77 79 Injects a PE file into a foreign processes 7->79 13 New P.O.scr.exe 5 10 7->13         started        18 powershell.exe 23 7->18         started        20 powershell.exe 23 7->20         started        22 schtasks.exe 1 7->22         started        81 Multi AV Scanner detection for dropped file 11->81 83 Contains functionality to bypass UAC (CMSTPLUA) 11->83 85 Contains functionality to steal Chrome passwords or cookies 11->85 87 2 other signatures 11->87 24 FmtqwKZIDwW.exe 11->24         started        26 schtasks.exe 11->26         started        signatures5 process6 dnsIp7 63 64.89.160.91, 49689, 49690, 49691 DIXIE-NETUS United States 13->63 65 127.0.0.1 unknown unknown 13->65 55 C:\Users\user\AppData\Local\Temp\TH89EF.tmp, PE32+ 13->55 dropped 57 C:\Users\user\AppData\Local\Temp\TH8700.tmp, MS-DOS 13->57 dropped 59 C:\Users\user\AppData\Local\Temp\TH86A1.tmp, MS-DOS 13->59 dropped 61 2 other malicious files 13->61 dropped 99 Detected Remcos RAT 13->99 101 Tries to harvest and steal browser information (history, passwords, etc) 13->101 103 Writes to foreign memory regions 13->103 107 2 other signatures 13->107 28 userinit.exe 13->28         started        31 userinit.exe 13->31         started        33 userinit.exe 13->33         started        35 chrome.exe 13->35         started        105 Loading BitLocker PowerShell Module 18->105 37 conhost.exe 18->37         started        39 WmiPrvSE.exe 18->39         started        41 conhost.exe 20->41         started        43 conhost.exe 22->43         started        45 conhost.exe 26->45         started        file8 signatures9 process10 signatures11 89 Tries to steal Mail credentials (via file registry) 28->89 91 Tries to harvest and steal browser information (history, passwords, etc) 28->91 93 Unusual module load detection (module proxying) 28->93 95 Tries to steal Instant Messenger accounts or passwords 31->95 97 Tries to steal Mail credentials (via file / registry access) 31->97
Score:
85%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a99b033ba05647d37a7e1e9de591fb6cb27495cd0368a1b165fbf8fde3785e2f
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.37 Win 64 Exe x64
Link:
https://app.malva.re/file/7fa7511894c2792a3709f4e8ef4ec6b4
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a99b033ba05647d37a7e1e9de591fb6cb27495cd0368a1b165fbf8fde3785e2f/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/a99b033ba05647d37a7e1e9de591fb6cb27495cd0368a1b165fbf8fde3785e2f
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2026-02-16 07:08:06 UTC
AV detection:
17 of 37 (45.95%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=vgnqgo5akzd5g6t6d2o6lep3nszhjfonanukdmlf7p4p3y3ylyxq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
392e729b28d037014cdd3f76d81c04d2a6eb877b38b10b6422b98c9bdf1fc437
RemcosRAT
3b416b770ff0a3b807935b5a6ec00a87684d2b12bb2095dd2cd3d80dcce9064d
RemcosRAT
77b015bc671a8973f4860bd55352b39c681ecdad4ac48a7348c6bb6fee204898
RemcosRAT
94c2d49590ae927fc6e983517b1eab54ea02b25eef72683527b127eb7add7a91
RemcosRAT
error
RemcosRAT
f2f54c1f70d2ad1d4deeadfdf3c9d27efbfbb9e09fb9beaabbfb7cf51d9eb4c3
RemcosRAT
+ 110 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remote collection credential_access discovery execution persistence rat spyware stealer
Link:
https://tria.ge/reports/260216-klj9qsat5b/
Behaviour
Enumerates system info in registry
Modifies data under HKEY_USERS
Modifies registry class
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Browser Information Discovery
Enumerates physical storage devices
System Location Discovery: System Language Discovery
System Time Discovery
Drops file in Windows directory
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Checks computer location settings
Executes dropped EXE
Reads user/profile data of web browsers
Command and Scripting Interpreter: PowerShell
Uses browser remote debugging
Detected Nirsoft tools
Remcos
Remcos family
Malware Config
C2 Extraction:
64.89.160.91:8080
Unpacked files
SH256 hash:
a99b033ba05647d37a7e1e9de591fb6cb27495cd0368a1b165fbf8fde3785e2f
MD5 hash:
7fa7511894c2792a3709f4e8ef4ec6b4
SHA1 hash:
5c6d43d7969ffc9a22553e9b4eb0b03ae2889b3d
Link:
https://www.unpac.me/results/45c486c4-d42e-4fba-82ca-ef31291c9db9/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a99b033ba056/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/a99b033ba05647d37a7e1e9de591fb6cb27495cd0368a1b165fbf8fde3785e2f

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:Check_OutputDebugStringA_iat
Create hunting rule
Rule name:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
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__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:Disable_Defender
Create hunting rule
Author:iam-py-test
Description:Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen
Rule name:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:INDICATOR_EXE_Packed_MPress
Create hunting rule
Author:ditekSHen
Description:Detects executables built or packed with MPress PE compressor
Rule name:INDICATOR_SUSPICIOUS_EXE_SQLQuery_ConfidentialDataStore
Create hunting rule
Author:ditekSHen
Description:Detects executables containing SQL queries to confidential data stores. Observed in infostealers
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Author:ditekSHen
Description:Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:Remcos_unpacked_PulseIntel
Create hunting rule
Author:PulseIntel
Description:Remcos Payload
Rule name:Sus_All_Windows_PE_Malware
Create hunting rule
Author:DiegoAnalytics
Description:Detects Windows PE malware of all types, avoids non-executables like .html
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:TeslaCryptPackedMalware
Create hunting rule
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Windows_Trojan_Remcos_921ef449
Create hunting rule
Author:Elastic Security
Rule name:Windows_Trojan_Remcos_b296e965
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/exploring-the-ref2731-intrusion-set
Rule name:win_remcos_rat_unpacked
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:win_remcos_w0
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:WIN_WebSocket_Base64_C2_20250726
Create hunting rule
Author:dogsafetyforeverone
Description:Detects configuration strings used by malware to specify WebSocket command-and-control endpoints inside Base64-encoded data. It looks for prefixes such as '#ws://' or '#wss://' that were found in QuasarRAT configuration data.
Rule name:yarahub_win_remcos_rat_unpacked_aug_2023
Create hunting rule
Author:Matthew @ Embee_Research

File information

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

Malspam

RemcosRAT

Executable exe a99b033ba05647d37a7e1e9de591fb6cb27495cd0368a1b165fbf8fde3785e2f

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/53397/

Comments