MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a4f1f9124305cce82a6b8c70ccde9b4d646103f5b320bd766ad53fcd5a19ff08. 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 8 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a4f1f9124305cce82a6b8c70ccde9b4d646103f5b320bd766ad53fcd5a19ff08
SHA3-384 hash: abb274ed4d78414ade614606fc8bf65ba2940c144a4e7b1fd8278eec3c1758e99c2322743005630280bb4d718baad86e
SHA1 hash: 7bf6b2159198dac24936893f4149a476c937340e
MD5 hash: b62d3d26fe0be00253dd5d11bee3bc82
humanhash: tennis-lima-papa-wolfram
File name:b62d3d26fe0be00253dd5d11bee3bc82
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:480'768 bytes
First seen:2022-09-16 08:13:36 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 5d354883fe6f15fcf48045037a99fb7a (118 x RemcosRAT)
ssdeep 12288:umnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSMn9:WiLJbpI7I2WhQqZ7M9
TLSH T1D7A4AE02BAD2C072D57161344D2AE735DABDBC212835997BB3E61D5BFD30180A73A7B2
TrID 32.2% (.EXE) Win64 Executable (generic) (10523/12/4)
20.1% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
15.4% (.EXE) Win16 NE executable (generic) (5038/12/1)
13.7% (.EXE) Win32 Executable (generic) (4505/5/1)
6.2% (.EXE) OS/2 Executable (generic) (2029/13)
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 :
305
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
b62d3d26fe0be00253dd5d11bee3bc82
Verdict:
Malicious activity
Analysis date:
2022-09-16 08:23:23 UTC
Tags:
keylogger remcos
Link:
https://app.any.run/tasks/a3396c58-ddb1-49ae-92b7-b7fae0b7d334

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/310481/
Detection(s):
Win.Trojan.Remcos-9841897-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a file in the %temp% subdirectories
Enabling the 'hidden' option for files in the %temp% directory
Creating a file
Creating a process from a recently created file
Creating a process with a hidden window
Creating a window
Running batch commands
Setting a keyboard event handler
Launching a process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a system process
Result
Malware family:
n/a
Score:
  6/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/37841/overview
Behaviour
MalwareBazaar
MeasuringTime
EvasionQueryPerformanceCounter
CheckCmdLine
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
cmd.exe eventvwr.exe fingerprint greyware keylogger rat remcos shell32.dll windows
Link:
https://www.filescan.io/uploads/6324309dba7b8113dd696e03/reports/ba316930-e74f-4991-b02b-a7d3f5b0f447/overview
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.
Malware family:
REMCOS
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/c324ea1e-c2df-4570-8120-c1e3cf5565ba
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1071487
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Delayed program exit found
Found evasive API chain (may stop execution after checking mutex)
Installs a global keyboard hook
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 dropped file
Multi AV Scanner detection for submitted file
Writes to foreign memory regions
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 704033 Sample: wNT8MGQBzy.exe Startdate: 16/09/2022 Architecture: WINDOWS Score: 100 38 Malicious sample detected (through community Yara rule) 2->38 40 Antivirus detection for dropped file 2->40 42 Antivirus / Scanner detection for submitted sample 2->42 44 4 other signatures 2->44 9 wNT8MGQBzy.exe 4 5 2->9         started        13 win6.exe 2->13         started        15 win6.exe 2->15         started        process3 file4 30 C:\Users\user\AppData\Local\Temp\...\win6.exe, PE32 9->30 dropped 32 C:\Users\user\...\win6.exe:Zone.Identifier, ASCII 9->32 dropped 34 C:\Users\user\AppData\Local\...\install.vbs, data 9->34 dropped 54 Contains functionalty to change the wallpaper 9->54 56 Contains functionality to steal Chrome passwords or cookies 9->56 58 Contains functionality to steal Firefox passwords or cookies 9->58 60 Delayed program exit found 9->60 17 wscript.exe 1 9->17         started        signatures5 process6 process7 19 cmd.exe 1 17->19         started        process8 21 win6.exe 3 4 19->21         started        25 conhost.exe 19->25         started        dnsIp9 36 51.210.137.26, 2404, 49712, 49713 OVHFR France 21->36 46 Antivirus detection for dropped file 21->46 48 Multi AV Scanner detection for dropped file 21->48 50 Machine Learning detection for dropped file 21->50 52 3 other signatures 21->52 27 svchost.exe 21->27         started        signatures10 process11 signatures12 62 Found evasive API chain (may stop execution after checking mutex) 27->62 64 Contains functionality to steal Chrome passwords or cookies 27->64 66 Contains functionality to steal Firefox passwords or cookies 27->66 68 Delayed program exit found 27->68
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a4f1f9124305cce82a6b8c70ccde9b4d646103f5b320bd766ad53fcd5a19ff08/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2022-09-16 08:14:09 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
23 of 26 (88.46%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=uty7sesdaxgoqktlrrymzxu3jvsgca7vwmql25tk2u742wqz74ea._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:win6 persistence rat
Link:
https://tria.ge/reports/220916-j4zlpsfbc2/
Behaviour
Modifies registry class
Suspicious behavior: MapViewOfSection
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
Loads dropped DLL
Executes dropped EXE
Remcos
Malware Config
C2 Extraction:
51.210.137.26:2404
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/63030f4e-1051-46e9-846f-e51d584f8a5c
Unpacked files
SH256 hash:
a4f1f9124305cce82a6b8c70ccde9b4d646103f5b320bd766ad53fcd5a19ff08
MD5 hash:
b62d3d26fe0be00253dd5d11bee3bc82
SHA1 hash:
7bf6b2159198dac24936893f4149a476c937340e
Detections:
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/053b09c3-08f2-4ea1-a83e-cbd4f7e7accc/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a4f1f9124305/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/a4f1f9124305cce82a6b8c70ccde9b4d646103f5b320bd766ad53fcd5a19ff08

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:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:RansomwareTest4
Create hunting rule
Author:Daoyuan Wu
Description:Test Ransomware YARA rules
Rule name:RansomwareTest5
Create hunting rule
Author:Daoyuan Wu
Description:Test Ransomware YARA rules
Rule name:RansomwareTest6
Create hunting rule
Author:Daoyuan Wu
Description:Test Ransomware YARA rules
Rule name:Record_Breaker_Similarities
Create hunting rule
Author:DigitalPanda
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
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.

Web download

RemcosRAT

Executable exe a4f1f9124305cce82a6b8c70ccde9b4d646103f5b320bd766ad53fcd5a19ff08

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2304973/
Cape
Cape
https://www.capesandbox.com/analysis/310481/

Comments


Avatar
zbet commented on 2022-09-16 08:13:43 UTC

url : hxxp://81.161.229.110/htdocs/dDBKZiWeAJLtEsY.exe