MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 48773abdad4ef3e8339d4ed2aa02f9d41611e02aefd9e93b0833a2ab99a1619f. 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: 19


Intelligence 19 IOCs YARA 20 File information Comments
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SHA256 hash: 48773abdad4ef3e8339d4ed2aa02f9d41611e02aefd9e93b0833a2ab99a1619f
SHA3-384 hash: be662c614d9e006d970da7b0110f699936df40a0433f97bcb9d9a44c7ab10161880ab3022f99ff6bb416b6bd323e0bd6
SHA1 hash: 7813d8411e63c5599cd3c85ed306e2e04562c079
MD5 hash: 78c37a72c91559ed73b7cbec99534bfc
humanhash: equal-quiet-cold-white
File name:48773abdad4ef3e8339d4ed2aa02f9d41611e02aefd9e93b0833a2ab99a1619f
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:526'848 bytes
First seen:2025-01-10 14:12:50 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 86ca2c7441a7bc06fdbf2f953fda5780 (1 x RemcosRAT)
ssdeep 12288:do1AcqnUMOYXUDCe+NaxMVkb7LrTwrC+X:doGHUMOL1AawkLrYC+X
TLSH T1B7B401227684C132F2AA453489258BB50A7FBC324F745ACF7BD4166D5F213E39A3139B
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
File icon (PE):PE icon
dhash icon 61611c18182dc175 (1 x RemcosRAT)
Reporter adrian__luca
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
327
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
48773abdad4ef3e8339d4ed2aa02f9d41611e02aefd9e93b0833a2ab99a1619f
Verdict:
Malicious activity
Analysis date:
2025-01-09 14:20:55 UTC
Tags:
remcos rat
Link:
https://app.any.run/tasks/2e1a1413-c4d0-4193-a7a4-e3fe82d05514

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Packer.pkr_ce1a-9980177-0
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67812b042c8240e189bb8683
Tags:
cobalt remcos
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Searching for synchronization primitives
Launching the default Windows debugger (dwwin.exe)
Creating a process from a recently created file
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
fingerprint microsoft_visual_cc
Link:
https://www.filescan.io/uploads/67812af78d6076a4982b42e1/reports/65759bf8-9019-49cf-b8de-7cd3f5c8bf0b/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/48773abdad4ef3e8339d4ed2aa02f9d41611e02aefd9e93b0833a2ab99a1619f
Result
Verdict:
SUSPICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
REMCOS
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/34bc41b2-b97a-4380-acfa-80735b375ae7
Result
Threat name:
Remcos
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Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1588924
Signature
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
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
Creates autostart registry keys with suspicious names
Delayed program exit found
Detected Remcos RAT
Detected unpacking (changes PE section rights)
Found malware configuration
Machine Learning detection for sample
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
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1588924 Sample: Wk731bq71c.exe Startdate: 11/01/2025 Architecture: WINDOWS Score: 100 62 Suricata IDS alerts for network traffic 2->62 64 Found malware configuration 2->64 66 Malicious sample detected (through community Yara rule) 2->66 68 8 other signatures 2->68 7 Wk731bq71c.exe 1 4 2->7         started        11 yavascript.exe 2->11         started        13 yavascript.exe 2->13         started        process3 file4 48 C:\Users\user\AppData\...\yavascript.exe, PE32 7->48 dropped 50 C:\Users\...\yavascript.exe:Zone.Identifier, ASCII 7->50 dropped 70 Contains functionality to bypass UAC (CMSTPLUA) 7->70 72 Detected unpacking (changes PE section rights) 7->72 74 Detected Remcos RAT 7->74 76 6 other signatures 7->76 15 yavascript.exe 7->15         started        19 WerFault.exe 16 7->19         started        22 WerFault.exe 16 7->22         started        26 6 other processes 7->26 24 WerFault.exe 11->24         started        signatures5 process6 dnsIp7 52 198.23.227.212, 32583, 49704, 50739 AS-COLOCROSSINGUS United States 15->52 54 Multi AV Scanner detection for dropped file 15->54 56 Contains functionality to bypass UAC (CMSTPLUA) 15->56 58 Detected unpacking (changes PE section rights) 15->58 60 5 other signatures 15->60 28 WerFault.exe 15->28         started        30 WerFault.exe 15->30         started        32 WerFault.exe 15->32         started        34 4 other processes 15->34 36 C:\ProgramData\Microsoft\...\Report.wer, Unicode 19->36 dropped 38 C:\ProgramData\Microsoft\...\Report.wer, Unicode 22->38 dropped 40 C:\ProgramData\Microsoft\...\Report.wer, Unicode 26->40 dropped 42 C:\ProgramData\Microsoft\...\Report.wer, Unicode 26->42 dropped 44 C:\ProgramData\Microsoft\...\Report.wer, Unicode 26->44 dropped 46 3 other malicious files 26->46 dropped file8 signatures9 process10
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/48773abdad4ef3e8339d4ed2aa02f9d41611e02aefd9e93b0833a2ab99a1619f
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/48773abdad4ef3e8339d4ed2aa02f9d41611e02aefd9e93b0833a2ab99a1619f/
Threat name:
Win32.Trojan.LummaStealer
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Status:
Malicious
First seen:
2024-12-16 12:57:40 UTC
AV detection:
17 of 23 (73.91%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=jb3tvpnnj3z6qm45j3jkuaxz2qlbdybk57m6soyigorkxgnbmgpq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
error
RemcosRAT
Result
Malware family:
remcos
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Score:
  10/10
Tags:
family:remcos botnet:yavakosa discovery persistence rat
Link:
https://tria.ge/reports/250110-rjjnrawnfz/
Behaviour
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Remcos
Remcos family
Malware Config
C2 Extraction:
198.23.227.212:32583
Verdict:
Malicious
Tags:
Win.Packer.pkr_ce1a-9980177-0
YARA:
n/a
Link:
https://app.threat.zone/submission/ae204029-c344-421a-8053-a9d90fb94c5f
Unpacked files
SH256 hash:
7a9cf1b27f192c4e65b215b4a126fac4aa8d34397d020568ba4590a15502cf9c
MD5 hash:
d457d91b513ac2e3a4b539c28537da71
SHA1 hash:
9fd2aca60e95212de7ccc546dd82729b5d050f02
Detections:
Remcos
Create hunting rule
win_remcos_auto
Create hunting rule
win_remcos_w0
Create hunting rule
malware_windows_remcos_rat
Create hunting rule
win_remcos_rat_unpacked
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
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Link:
https://www.unpac.me/results/36633dc7-ea1b-4cb7-951d-ff4d0c258904/
Parent samples :
7a9cf1b27f192c4e65b215b4a126fac4aa8d34397d020568ba4590a15502cf9c
034b31656266ad9f80490a4fc983ac53bb3224ac88084069080ee2ba0a91fc20
8038ff6a41673eb151cdb7f03872c741dc762834c856d70030cd54af744e36a4
0e184edac45ddeaf7ca4681b65e7b4accafb6705032faf6d2f6a61d2ef6d1ded
ed1416c90a49177106cbea5b7551756e06fee46d77fde4879b8735ec56dd54b4
48773abdad4ef3e8339d4ed2aa02f9d41611e02aefd9e93b0833a2ab99a1619f
4d8f242a1d64b3b41748d2bd56ee6f7119434dedcdf793a83cea95fb31d13347
SH256 hash:
48773abdad4ef3e8339d4ed2aa02f9d41611e02aefd9e93b0833a2ab99a1619f
MD5 hash:
78c37a72c91559ed73b7cbec99534bfc
SHA1 hash:
7813d8411e63c5599cd3c85ed306e2e04562c079
Link:
https://www.unpac.me/results/36633dc7-ea1b-4cb7-951d-ff4d0c258904/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/48773abdad4e/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

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:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:golang_david_CSC846
Create hunting rule
Author:David
Description:CSC-846 Golang
Rule name:iexplorer_remcos
Create hunting rule
Author:iam-py-test
Description:Detect iexplorer being taken over by Remcos
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:lsi_remcos2
Create hunting rule
Author:anonym
Description:Remcos_V5 Payload
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:RansomPyShield_Antiransomware
Create hunting rule
Author:XiAnzheng
Description:Check for Suspicious String and Import combination that Ransomware mostly abuse(can create FP)
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
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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
Rule name:Windows_Trojan_Generic_2993e5a5
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_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.
Rule name:win_remcos_w0
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
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.

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high
CHECK_NXMissing Non-Executable Memory Protectioncritical
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh
Reviews
IDCapabilitiesEvidence
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CloseHandle
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::FindNextVolumeMountPointA
KERNEL32.dll::FindNextVolumeW
KERNEL32.dll::GetDevicePowerState
KERNEL32.dll::LoadLibraryW
KERNEL32.dll::LoadLibraryA
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::WriteConsoleInputW
KERNEL32.dll::WriteConsoleInputA
KERNEL32.dll::WriteConsoleA
KERNEL32.dll::WriteConsoleW
KERNEL32.dll::ReadConsoleInputW
KERNEL32.dll::SetStdHandle
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileA
KERNEL32.dll::CreateFileA
KERNEL32.dll::GetFileAttributesW
KERNEL32.dll::GetTempFileNameW
WIN_BASE_USER_APIRetrieves Account InformationKERNEL32.dll::GetComputerNameA

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