MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 631e26376c6eec5070da9a40c576e0aa99fdc91cc53d0e0ee96d68b8cf3f97e6. 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 10 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 631e26376c6eec5070da9a40c576e0aa99fdc91cc53d0e0ee96d68b8cf3f97e6
SHA3-384 hash: 90ba9700532e1667e023af41f4de213a6ac3e83d0d2abd4f203123f9bc53212c58aedf3c2a3a38b7a13efd9812e1a445
SHA1 hash: f11bf551264fce42609dc6f9d7e3ee8d07ce7fc0
MD5 hash: 03fc9038c0848033b60c4b7b44f350bb
humanhash: spring-michigan-floor-stream
File name:судовий лист, інформація щодо заборгування.pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:796'816 bytes
First seen:2023-02-06 14:28:33 UTC
Last seen:2023-02-06 16:40:11 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'658 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:RqeSPxZHRI0aF3IBXDPdQWatLHNn63r/iyAAb8T3rUUUIyP:RaPhITRA+XtLtn6NAAgT3ZyP
TLSH T1A5051317379DFE5EE5AB11BB48F359A20326C05D1922CB23A59C112E6E233DE6707B13
TrID 67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.7% (.EXE) Win64 Executable (generic) (10523/12/4)
6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.1% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon c4dadadad2f492c2 (25 x GuLoader, 14 x RemcosRAT, 7 x AgentTesla)
Reporter 0xToxin
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
190
Origin country :
IL IL
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
судовий лист, інформація щодо заборгування.pdf.exe
Verdict:
Malicious activity
Analysis date:
2023-02-06 14:32:04 UTC
Tags:
keylogger remcos trojan rat
Link:
https://app.any.run/tasks/f8a8d2d6-2c67-45de-a571-208809dddf16

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/360908/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.1821.28425.6542.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a file in the %temp% directory
Сreating synchronization primitives
Creating a process from a recently created file
Creating a file
Enabling the 'hidden' option for recently created files
Sending a custom TCP request
DNS request
Sending an HTTP GET request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-vm obfuscated overlay packed
Link:
https://www.filescan.io/uploads/63e10eb01c9cbf7d62562371/reports/a3acc589-168e-4069-ab94-2e477cca94ee/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/631e26376c6eec5070da9a40c576e0aa99fdc91cc53d0e0ee96d68b8cf3f97e6
Result
Verdict:
UNKNOWN
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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/5ae341d2-d86b-4232-8d3a-3356bb9468f3
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1166926
Signature
Antivirus detection for dropped file
Antivirus detection for URL or domain
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
Contains functionalty to change the wallpaper
Creates an undocumented autostart registry key
Delayed program exit found
Initial sample is a PE file and has a suspicious name
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Uses an obfuscated file name to hide its real file extension (double extension)
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: 799697 Sample: 044f.pdf.exe Startdate: 06/02/2023 Architecture: WINDOWS Score: 100 46 Multi AV Scanner detection for domain / URL 2->46 48 Malicious sample detected (through community Yara rule) 2->48 50 Antivirus detection for URL or domain 2->50 52 12 other signatures 2->52 8 044f.pdf.exe 3 2->8         started        11 sql.exe 1 1 2->11         started        14 sql.exe 1 1 2->14         started        16 4 other processes 2->16 process3 file4 36 C:\Users\user\AppData\Local\Temp\2.exe, PE32 8->36 dropped 38 C:\Users\user\AppData\...\044f.pdf.exe.log, ASCII 8->38 dropped 18 2.exe 3 3 8->18         started        62 Writes to foreign memory regions 11->62 64 Maps a DLL or memory area into another process 11->64 22 iexplore.exe 11->22         started        24 iexplore.exe 14->24         started        26 iexplore.exe 16->26         started        signatures5 process6 file7 34 C:\Users\user\sql\sql.exe, PE32 18->34 dropped 54 Antivirus detection for dropped file 18->54 56 Multi AV Scanner detection for dropped file 18->56 58 Creates an undocumented autostart registry key 18->58 60 Machine Learning detection for dropped file 18->60 28 sql.exe 2 1 18->28         started        signatures8 process9 signatures10 66 Antivirus detection for dropped file 28->66 68 Multi AV Scanner detection for dropped file 28->68 70 Machine Learning detection for dropped file 28->70 72 2 other signatures 28->72 31 iexplore.exe 1 28->31         started        process11 dnsIp12 40 101.99.91.158, 5222 SHINJIRU-MY-AS-APShinjiruTechnologySdnBhdMY Malaysia 31->40 42 94.131.99.153, 5222, 8080 NASSIST-ASGI Ukraine 31->42 44 4 other IPs or domains 31->44
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/631e26376c6eec5070da9a40c576e0aa99fdc91cc53d0e0ee96d68b8cf3f97e6/
Threat name:
ByteCode-MSIL.Backdoor.Androm
Create hunting rule
Status:
Malicious
First seen:
2023-02-06 14:29:06 UTC
File Type:
PE (.Net Exe)
Extracted files:
17
AV detection:
18 of 26 (69.23%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=mmpcmn3mn3wfa4g2tjamk5xavkm73si4yu6q4dxjnvulrtz7s7ta._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:hosts persistence rat
Link:
https://tria.ge/reports/230206-rtkc2ahf31/
Behaviour
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Adds policy Run key to start application
Remcos
Unpacked files
SH256 hash:
ca408a4f313a8dc8afe42b490e74b345d758bc319c0b5b251f03fed84e8deb0e
MD5 hash:
ee42511075de43ee5be1f719b9d821f3
SHA1 hash:
ee98bfb1daca038e3d9be04941f962d1050fc7d9
Detections:
Remcos
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/a28aa41c-b41b-4419-a781-28185dcdbf74/
SH256 hash:
631e26376c6eec5070da9a40c576e0aa99fdc91cc53d0e0ee96d68b8cf3f97e6
MD5 hash:
03fc9038c0848033b60c4b7b44f350bb
SHA1 hash:
f11bf551264fce42609dc6f9d7e3ee8d07ce7fc0
Link:
https://www.unpac.me/results/a28aa41c-b41b-4419-a781-28185dcdbf74/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/631e26376c6e/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/631e26376c6eec5070da9a40c576e0aa99fdc91cc53d0e0ee96d68b8cf3f97e6

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:iexplorer_remcos
Create hunting rule
Author:iam-py-test
Description:Detect iexplorer being taken over by Remcos
Rule name:INDICATOR_EXE_Packed_SmartAssembly
Create hunting rule
Author:ditekSHen
Description:Detects executables packed with SmartAssembly
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:pe_imphash
Create hunting rule
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Windows_Trojan_Remcos_b296e965
Create hunting rule
Author:Elastic Security
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/360908/

Comments