MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fd16b4767d7764fde593f6b7d6449ccb233c18270bf45d67edde500c5028dc94. 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: 13


Intelligence 13 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fd16b4767d7764fde593f6b7d6449ccb233c18270bf45d67edde500c5028dc94
SHA3-384 hash: a21fe26137660400b1adde5a34ba6a0bdda054f84128070524d583a4ee5c5d0ea27ef8549891d49e77a32deed373895d
SHA1 hash: 97e59f85f0bcc0bdd6635ad21d1c43d4dfc28676
MD5 hash: 1ba47e918f50f837096de2379c5d5150
humanhash: robert-west-uncle-hotel
File name:Oral-Action.scr
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'765'888 bytes
First seen:2021-01-06 07:17:00 UTC
Last seen:2021-01-06 08:34:02 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 3072:2TgYDscwoO+AqFLpr/70CzBKcJ2XO9rISUyuo1KP1:tc8zqFtNKK2e1ISUs6
Threatray 1'316 similar samples on MalwareBazaar
TLSH 068583056FD3254EF2F7E07612B19ADAAF78FB7A32409A0D865D2A550C03F462F93D06
Reporter abuse_ch
Tags:Rackspace RAT RemcosRAT scr


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: smtp79.iad3a.emailsrvr.com
Sending IP: 173.203.187.79
From: starrsmill@snapfitness.com
Subject: Payroll Correction
Attachment: Pay check error.img (contains "Oral-Action.scr")

Intelligence

File Origin
# of uploads :
2
# of downloads :
208
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Oral-Action.scr
Verdict:
Malicious activity
Analysis date:
2021-01-06 07:23:22 UTC
Tags:
rat remcos keylogger
Link:
https://app.any.run/tasks/caa7b7a5-69e0-413c-a635-b43592aa825a

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/110677/
Detection(s):
SecuriteInfo.com.BehavesLike.Win32.Backdoor.tz.31847.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file
Launching cmd.exe command interpreter
Creating a file in the %AppData% subdirectories
Creating a file in the %temp% directory
Sending a UDP request
Launching a process
Creating a process from a recently created file
Creating a process with a hidden window
Deleting a recently created file
Running batch commands
DNS request
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Blocking the User Account Control
Unauthorized injection to a recently created process by context flags manipulation
Setting a global event handler for the keyboard
Sending a TCP request to an infection source
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:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/574838
Signature
Contains functionality to capture and log keystrokes
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Detected Remcos RAT
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Icon mismatch, binary includes an icon from a different legit application in order to fool users
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
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
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 336477 Sample: Oral-Action.scr Startdate: 06/01/2021 Architecture: WINDOWS Score: 100 65 Malicious sample detected (through community Yara rule) 2->65 67 Icon mismatch, binary includes an icon from a different legit application in order to fool users 2->67 69 Multi AV Scanner detection for submitted file 2->69 71 3 other signatures 2->71 12 Oral-Action.exe 3 2->12         started        16 start.exe 2 2->16         started        18 start.exe 2->18         started        process3 file4 61 C:\Users\user\AppData\...\Oral-Action.exe.log, ASCII 12->61 dropped 77 Detected unpacking (changes PE section rights) 12->77 79 Detected unpacking (overwrites its own PE header) 12->79 81 Contains functionalty to change the wallpaper 12->81 85 4 other signatures 12->85 20 Oral-Action.exe 4 5 12->20         started        23 Oral-Action.exe 12->23         started        83 Injects a PE file into a foreign processes 16->83 25 start.exe 16->25         started        27 start.exe 16->27         started        29 start.exe 18->29         started        signatures5 process6 file7 57 C:\Users\user\AppData\Roaming\...\start.exe, PE32 20->57 dropped 59 C:\Users\user\...\start.exe:Zone.Identifier, ASCII 20->59 dropped 31 wscript.exe 1 20->31         started        33 cmd.exe 1 20->33         started        process8 process9 35 cmd.exe 1 31->35         started        37 conhost.exe 33->37         started        39 reg.exe 1 33->39         started        process10 41 start.exe 3 35->41         started        44 conhost.exe 35->44         started        signatures11 73 Multi AV Scanner detection for dropped file 41->73 75 Machine Learning detection for dropped file 41->75 46 start.exe 2 192 41->46         started        49 start.exe 41->49         started        process12 dnsIp13 63 masters4733.sytes.net 79.134.225.8, 49732, 8686 FINK-TELECOM-SERVICESCH Switzerland 46->63 51 cmd.exe 1 46->51         started        process14 process15 53 conhost.exe 51->53         started        55 reg.exe 51->55         started       
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/fd16b4767d7764fde593f6b7d6449ccb233c18270bf45d67edde500c5028dc94/
Threat name:
ByteCode-MSIL.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2021-01-05 22:01:35 UTC
AV detection:
10 of 29 (34.48%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=7ulli5t5o5sp3zmt6235mre4zmrtygbhbp2f2z7n3ziayubi3ska._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
3f1a2ec195c60a1f8789ac36368ae30a2b187858c957115bf88f40344bf0e6fa
RemcosRAT
4791861118e0be776fd14153e2feca7d25f5a91a6c32a997385f5ae272e3d7c8
RemcosRAT
4a94b062dbb9df940520146d100df5b019795d0f508d7ba89d24eb18725e1608
RemcosRAT
54c9967a2b3467f1a5961630d0bd429400e781de19866a383267c40e0f9acf2f
RemcosRAT
5b10f4a23880b51923a0df3e9e3c37f40eb0d3cc93de7b463da62f936a501385
RemcosRAT
86992692d34557946a1fd9a96b11789d1ba43b74eb41eeb99181c53ec8c0840c
RemcosRAT
b8bcf3a59b89b2ebc0fb7cfba5f8f726de83b08acd072b55c557cf89d16210c9
RemcosRAT
e1865abf21c3b8f3b3d15e6c6e477468941f9e65700ceaaa0f4cb269d967c83e
RemcosRAT
f6c8f18b6a8db8307ea07c171236d118f91924e497027eeb305800ba2eee4fbe
RemcosRAT
f7e29cbf47c9804eb341836873ea6837be7a46639978f44d9ba2670d47e68d56
RemcosRAT
+ 1'306 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos evasion persistence rat trojan
Link:
https://tria.ge/reports/210106-51ddby827j/
Behaviour
Modifies registry key
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Executes dropped EXE
Remcos
UAC bypass
Malware Config
C2 Extraction:
masters4733.sytes.net:8686
Unpacked files
SH256 hash:
fd16b4767d7764fde593f6b7d6449ccb233c18270bf45d67edde500c5028dc94
MD5 hash:
1ba47e918f50f837096de2379c5d5150
SHA1 hash:
97e59f85f0bcc0bdd6635ad21d1c43d4dfc28676
Link:
https://www.unpac.me/results/969b55eb-8036-44d4-bb7d-60a2c5d52796/
SH256 hash:
b2247baac9d03f499d81dac70d46acca8ca3ff9481412ca47096754958493b0b
MD5 hash:
3dc88b6003c1a9145b9a6e930b7fa6b3
SHA1 hash:
d1a7ce36dc517229a3b8644440883d07e8d6a0c7
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/969b55eb-8036-44d4-bb7d-60a2c5d52796/
SH256 hash:
43c7495932b285ba4208f4ae098a5800cf75e46887adccb7fd24b0ae4be2d40e
MD5 hash:
3173370e938e73024f1782a94747ad4a
SHA1 hash:
37b36dc80c036dc528953654b1513115628813c6
Link:
https://www.unpac.me/results/969b55eb-8036-44d4-bb7d-60a2c5d52796/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/fd16b4767d7764fde593f6b7d6449ccb233c18270bf45d67edde500c5028dc94

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:ach_RemcosRAT
Create hunting rule
Author:abuse.ch
Rule name:Chrome_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Chrome in files like avemaria
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:Keylog_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Contains Keylog
Rule name:Parallax
Create hunting rule
Author:@bartblaze
Description:Identifies Parallax RAT.
Rule name:Remcos
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Remcos in memory
Rule name:remcos_rat
Create hunting rule
Author:jeFF0Falltrades
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:autogenerated rule brought to you by yara-signator

File information

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

Malspam

RemcosRAT

img 01cca1f337c187c205f8d9eb483f3e9af291b3c6309eaf0b48c1a2964564eb6c

RemcosRAT

Executable exe fd16b4767d7764fde593f6b7d6449ccb233c18270bf45d67edde500c5028dc94

(this sample)

  
Dropped by
MD5 c7a84d9e0d14f35ca6fbccd7038015f3
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 01cca1f337c187c205f8d9eb483f3e9af291b3c6309eaf0b48c1a2964564eb6c
Cape
Cape
https://www.capesandbox.com/analysis/110677/

Comments