MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15. 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 3 File information Comments 1

SHA256 hash: aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15
SHA3-384 hash: a7524407498cfcd054d821d4a0ded4f8792b9bf8874c42844e4fd4e2c6030f731522622791a233d3cedac485c69e7528
SHA1 hash: 71bdec8e589a0af4823c87a7f3fb2158f5ec33a5
MD5 hash: da104509d31179c8b183b72ab096b9c2
humanhash: crazy-hotel-william-iowa
File name:da104509d31179c8b183b72ab096b9c2
Download: download sample
Signature RemcosRAT
File size:1'985'536 bytes
First seen:2024-11-07 14:15:39 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 2eabe9054cad5152567f0699947a2c5b (2'852 x LummaStealer, 1'312 x Stealc, 1'026 x Healer)
ssdeep 49152:VnMA5X2hFShTVb+JzPPBsJnEPsn6wzJtvwSHgG+GMj8l:aA5mLQxyBsusnnvwYKj
TLSH T18D95334D2F72E46CC8088AF19449CBF4BE2AAC71A4DDE123E1E47F17F197D65AE16840
TrID 29.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
22.7% (.EXE) Win16 NE executable (generic) (5038/12/1)
20.3% (.EXE) Win32 Executable (generic) (4504/4/1)
9.1% (.EXE) OS/2 Executable (generic) (2029/13)
9.0% (.EXE) Generic Win/DOS Executable (2002/3)
Magika pebin
File icon (PE):PE icon
dhash icon c4d48eaa8ad4d4f8 (1'000 x RemcosRAT, 1 x Worm.Ramnit, 1 x Vjw0rm)
Reporter zbetcheckin
Tags:32 exe RemcosRAT

Intelligence


File Origin
# of uploads :
1
# of downloads :
314
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
ID:
1
File name:
da104509d31179c8b183b72ab096b9c2
Verdict:
Malicious activity
Analysis date:
2024-11-07 14:34:35 UTC
Tags:
rat remcos remote evasion themida

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
91.7%
Tags:
vmdetect backdoor keylog word
Result
Verdict:
Clean
Maliciousness:

Behaviour
Сreating synchronization primitives
Searching for analyzing tools
Searching for the window
Setting a keyboard event handler
DNS request
Connecting to a non-recommended domain
Connection attempt
Sending a custom TCP request
Creating a file
Sending an HTTP GET request
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
anti-vm microsoft_visual_cc packed packed packer_detected
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Signature
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
Detected Remcos RAT
Hides threads from debuggers
Installs a global keyboard hook
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
PE file contains section with special chars
Sigma detected: Remcos
Suricata IDS alerts for network traffic
Tries to detect process monitoring tools (Task Manager, Process Explorer etc.)
Tries to detect sandboxes / dynamic malware analysis system (registry check)
Tries to detect sandboxes and other dynamic analysis tools (window names)
Tries to detect virtualization through RDTSC time measurements
Tries to evade debugger and weak emulator (self modifying code)
Uses dynamic DNS services
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Threat name:
Win32.Trojan.Remcos
Status:
Malicious
First seen:
2024-11-07 14:16:05 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
16 of 38 (42.11%)
Threat level:
  5/5
Result
Malware family:
Score:
  10/10
Tags:
family:remcos botnet:ms-office discovery evasion rat
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
System Location Discovery: System Language Discovery
Suspicious use of NtSetInformationThreadHideFromDebugger
Checks BIOS information in registry
Identifies Wine through registry keys
Identifies VirtualBox via ACPI registry values (likely anti-VM)
Remcos
Remcos family
Malware Config
C2 Extraction:
ms-office.duckdns.org:39438
ms-office1.duckdns.org:39439
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
edd3ef98eb33607786ea05e99b10d249e86cbcb727267f94f48479538fe523a0
MD5 hash:
185fa261408322e8478f9b4d465e76a4
SHA1 hash:
495f6285de299f391e6871e62de5783ba2883338
Detections:
Remcos win_remcos_w0 malware_windows_remcos_rat INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM win_remcos_rat_unpacked
SH256 hash:
aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15
MD5 hash:
da104509d31179c8b183b72ab096b9c2
SHA1 hash:
71bdec8e589a0af4823c87a7f3fb2158f5ec33a5
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:pe_detect_tls_callbacks
Rule name:vmdetect
Author:nex
Description:Possibly employs anti-virtualization techniques

File information


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

Web download

RemcosRAT

Executable exe aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15

(this sample)

  
Delivery method
Distributed via web download

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

Comments



Avatar
zbet commented on 2024-11-07 14:15:41 UTC

url : hxxp://31.41.244.10/files/remcos_a.exe