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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a0911f69ebcbc93540e63bf007fcab0bbece1a9f55c780ea29fc0a4935e2b93b. 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: 15


Intelligence 15 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a0911f69ebcbc93540e63bf007fcab0bbece1a9f55c780ea29fc0a4935e2b93b
SHA3-384 hash: 677dc1d42d01e91314fe205639a73edf083e38553bb5408a3c9e67bcc1e92ff12c076216df12d6edbc4d17aed2ff1f84
SHA1 hash: f35faaa0884f2124d15172e22e889f306a6ab4dc
MD5 hash: 909b5860cad8562a6908b2e043e89da8
humanhash: nine-early-august-seventeen
File name:rrXcTwCT.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:126'976 bytes
First seen:2022-08-10 19:51:51 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 5f0c90c109d16124e83cb7a25caef54f (28 x RemcosRAT, 1 x FormBook, 1 x NetWire)
ssdeep 3072:mpgk9sZwnSD9Pb0CR36oWdHZ8xyicFtsnal5OzqhPL9tn:Cgk9EySD9z0CjeHyxyicFtsnavOzqhPb
TLSH T12DC3E867F24B80A3D863027056507B72ADBCFC321A5D5157E7E8D8811DF588E902AAFF
TrID 33.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
17.6% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
14.0% (.SCR) Windows screen saver (13101/52/3)
11.2% (.EXE) Win64 Executable (generic) (10523/12/4)
7.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
File icon (PE):PE icon
dhash icon d4a22b2e0792f0f0 (26 x RemcosRAT, 1 x NetWire)
Reporter pmelson
Tags:exe remcos RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
283
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
rrXcTwCT.exe
Verdict:
Malicious activity
Analysis date:
2022-08-10 19:52:49 UTC
Tags:
rat remcos keylogger
Link:
https://app.any.run/tasks/c7c60b7f-9418-4ab4-803c-187463b977ba

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/297746/
Detection(s):
Win.Trojan.Remcos-9763891-0
Create hunting rule

Win.Trojan.Remcos-9841897-0
Create hunting rule

Win.Malware.Rescoms-6598304-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Launching cmd.exe command interpreter
Creating a file in the Windows subdirectories
Enabling the 'hidden' option for recently created files
Creating a file in the %temp% directory
Launching a process
Changing a file
Creating a file
Creating a process from a recently created file
Creating a process with a hidden window
Creating a window
Running batch commands
Creating a file in the %AppData% subdirectories
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Blocking the User Account Control
Setting a global event handler for the keyboard
Unauthorized injection to a system process
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/28565/overview
Behaviour
MalwareBazaar
Malware family:
REMCOS
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/1bd16744-59fe-47a8-a27b-1b79bf349d3c
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1049470
Signature
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
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
Creates an autostart registry key pointing to binary in C:\Windows
Deletes itself after installation
Detected Remcos RAT
Disables UAC (registry)
Drops executables to the windows directory (C:\Windows) and starts them
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
Uses cmd line tools excessively to alter registry or file data
Writes to foreign memory regions
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 681961 Sample: rrXcTwCT.exe Startdate: 10/08/2022 Architecture: WINDOWS Score: 100 66 Malicious sample detected (through community Yara rule) 2->66 68 Antivirus detection for dropped file 2->68 70 Antivirus / Scanner detection for submitted sample 2->70 72 5 other signatures 2->72 10 rrXcTwCT.exe 4 5 2->10         started        14 srchost.exe 1 1 2->14         started        16 srchost.exe 1 1 2->16         started        process3 file4 60 C:\Windows\SysWOW64\srchost\srchost.exe, PE32 10->60 dropped 62 C:\Windows\...\srchost.exe:Zone.Identifier, ASCII 10->62 dropped 64 C:\Users\user\AppData\Local\...\install.vbs, data 10->64 dropped 80 Contains functionality to steal Chrome passwords or cookies 10->80 82 Contains functionality to capture and log keystrokes 10->82 84 Contains functionality to inject code into remote processes 10->84 94 2 other signatures 10->94 18 wscript.exe 1 10->18         started        21 cmd.exe 1 10->21         started        86 Detected Remcos RAT 14->86 88 Writes to foreign memory regions 14->88 90 Allocates memory in foreign processes 14->90 23 cmd.exe 1 14->23         started        25 iexplore.exe 14->25         started        92 Injects a PE file into a foreign processes 16->92 27 cmd.exe 1 16->27         started        29 iexplore.exe 16->29         started        signatures5 process6 signatures7 74 Deletes itself after installation 18->74 31 cmd.exe 1 18->31         started        76 Uses cmd line tools excessively to alter registry or file data 21->76 34 reg.exe 1 21->34         started        36 conhost.exe 21->36         started        38 conhost.exe 23->38         started        40 reg.exe 1 23->40         started        42 conhost.exe 27->42         started        44 reg.exe 1 27->44         started        process8 signatures9 104 Drops executables to the windows directory (C:\Windows) and starts them 31->104 46 srchost.exe 3 1 31->46         started        49 conhost.exe 31->49         started        106 Disables UAC (registry) 34->106 process10 signatures11 96 Antivirus detection for dropped file 46->96 98 Multi AV Scanner detection for dropped file 46->98 100 Detected Remcos RAT 46->100 102 7 other signatures 46->102 51 cmd.exe 1 46->51         started        54 iexplore.exe 46->54         started        process12 signatures13 78 Uses cmd line tools excessively to alter registry or file data 51->78 56 conhost.exe 51->56         started        58 reg.exe 1 51->58         started        process14
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a0911f69ebcbc93540e63bf007fcab0bbece1a9f55c780ea29fc0a4935e2b93b/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2022-08-10 19:52:10 UTC
File Type:
PE (Exe)
Extracted files:
2
AV detection:
25 of 26 (96.15%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ucir62plzpetkqhghpyap7flbo7m4gu7kxdyb2rj7qfesnpcxe5q._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost evasion persistence rat trojan
Link:
https://tria.ge/reports/220810-yldnvaecdj/
Behaviour
Modifies registry class
Modifies registry key
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in System32 directory
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
Deletes itself
Loads dropped DLL
Executes dropped EXE
Remcos
UAC bypass
Malware Config
C2 Extraction:
67.211.213.207:444
Unpacked files
SH256 hash:
a0911f69ebcbc93540e63bf007fcab0bbece1a9f55c780ea29fc0a4935e2b93b
MD5 hash:
909b5860cad8562a6908b2e043e89da8
SHA1 hash:
f35faaa0884f2124d15172e22e889f306a6ab4dc
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/d5875b0c-4518-4ce9-a9bf-c5743f415d09/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a0911f69ebcb/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/a0911f69ebcbc93540e63bf007fcab0bbece1a9f55c780ea29fc0a4935e2b93b

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:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:malware_Remcos_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Remcos in memory
Rule name:Parallax
Create hunting rule
Author:@bartblaze
Description:Identifies Parallax RAT.
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:remcos_rat
Create hunting rule
Author:jeFF0Falltrades
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:SUSP_VBS_Wscript_Shell
Create hunting rule
Author:SECUINFRA Falcon Team
Description:Detects the definition of 'Wscript.Shell' which is often used by Malware, FPs are possible and commmon
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 a0911f69ebcbc93540e63bf007fcab0bbece1a9f55c780ea29fc0a4935e2b93b

(this sample)

  
Link
https://www.virustotal.com/gui/file/a0911f69ebcbc93540e63bf007fcab0bbece1a9f55c780ea29fc0a4935e2b93b/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/297746/

Comments