MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a4da37e92ca54c8851ad144fba875b61e2018f69bbe43b11926d8f8d831b56f0. 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: 19


Intelligence 19 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a4da37e92ca54c8851ad144fba875b61e2018f69bbe43b11926d8f8d831b56f0
SHA3-384 hash: 2d045c572d23f350d4cbe862b64b6573c8f51b64b8c8218661a6584a5ef09bc655d34a9f2c82b4628d0c812243a96977
SHA1 hash: 77c96429d6facbd1900290c9cbfed378103b8e01
MD5 hash: 2b8f487213f3da1f42779e22d7b02d1a
humanhash: victor-nuts-kentucky-seventeen
File name:2b8f487213f3da1f42779e22d7b02d1a.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:486'912 bytes
First seen:2023-02-03 19:21:51 UTC
Last seen:2025-02-04 05:52:02 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash b1c8f7572a6db205362528e88fd3ff32 (21 x RemcosRAT)
ssdeep 6144:GGqPd7rxgdfHD0Tnt5eh+4CwineHvWyBKxrw/5ttwAMS6NZ0sAOZZ7QX3cUiKRq:GGAxQj0bTe04CLneHvW9rwbxs/Z7WRq
TLSH T12FA4AE01BAC2C072D57524344D2AF735DABCBC212925597BB3EA1D5BFE30190A72A7B3
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 abuse_ch
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
12
# of downloads :
186
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
a4da37e92ca54c8851ad144fba875b61e2018f69bbe43b11926d8f8d831b56f0
Verdict:
Malicious activity
Analysis date:
2023-02-02 04:25:22 UTC
Tags:
keylogger remcos
Link:
https://app.any.run/tasks/ae3cee6f-5b79-4263-9064-d42d23162c12

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/360025/
Detection(s):
Win.Trojan.Remcos-9841897-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Launching cmd.exe command interpreter
Creating a file in the %AppData% subdirectories
Enabling the 'hidden' option for recently created files
Launching a process
Changing a file
Creating a file
Creating a process from a recently created file
Setting a keyboard event handler
Searching for synchronization primitives
Creating a window
Creating a file in the %temp% subdirectories
Launching a service
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Blocking the User Account Control
Unauthorized injection to a system process
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/65113/overview
Behaviour
MalwareBazaar
MeasuringTime
CheckMutex
CheckCmdLine
EvasionQueryPerformanceCounter
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
cmd.exe exploit explorer.exe fingerprint greyware keylogger rat remcos shell32.dll
Link:
https://www.filescan.io/uploads/63dd5ede89bd67c10fdc6551/reports/559c761b-a2b5-4967-9e87-0c529254b52b/overview
Verdict:
Malicious
Labled as:
Remcos.Generic
Link:
https://www.hybrid-analysis.com/sample/a4da37e92ca54c8851ad144fba875b61e2018f69bbe43b11926d8f8d831b56f0
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/0a8cb7a9-424c-4415-8be4-a332d6be9a36
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1165542
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
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
Delayed program exit found
Deletes itself after installation
Disables UAC (registry)
Found stalling execution ending in API Sleep call
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
Uses cmd line tools excessively to alter registry or file data
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: 798313 Sample: 2xxUDXYnX9.exe Startdate: 03/02/2023 Architecture: WINDOWS Score: 100 86 Malicious sample detected (through community Yara rule) 2->86 88 Antivirus / Scanner detection for submitted sample 2->88 90 Multi AV Scanner detection for submitted file 2->90 92 10 other signatures 2->92 9 2xxUDXYnX9.exe 3 4 2->9         started        13 76y5trfed675ytg.exe 1 1 2->13         started        15 76y5trfed675ytg.exe 1 1 2->15         started        17 3 other processes 2->17 process3 file4 74 C:\Users\user\AppData\...\76y5trfed675ytg.exe, PE32 9->74 dropped 76 C:\...\76y5trfed675ytg.exe:Zone.Identifier, ASCII 9->76 dropped 120 Contains functionality to bypass UAC (CMSTPLUA) 9->120 122 Contains functionalty to change the wallpaper 9->122 124 Contains functionality to steal Chrome passwords or cookies 9->124 130 2 other signatures 9->130 19 76y5trfed675ytg.exe 2 1 9->19         started        22 cmd.exe 1 9->22         started        126 Writes to foreign memory regions 13->126 128 Maps a DLL or memory area into another process 13->128 24 iexplore.exe 1 18 13->24         started        27 cmd.exe 1 13->27         started        29 iexplore.exe 1 18 15->29         started        31 cmd.exe 1 15->31         started        signatures5 process6 dnsIp7 106 Antivirus detection for dropped file 19->106 108 Multi AV Scanner detection for dropped file 19->108 110 Machine Learning detection for dropped file 19->110 116 2 other signatures 19->116 33 iexplore.exe 2 20 19->33         started        37 cmd.exe 19->37         started        112 Uses cmd line tools excessively to alter registry or file data 22->112 39 reg.exe 1 22->39         started        41 conhost.exe 22->41         started        82 geoplugin.net 24->82 114 Installs a global keyboard hook 24->114 43 cmd.exe 1 24->43         started        45 conhost.exe 27->45         started        47 reg.exe 1 27->47         started        84 geoplugin.net 29->84 49 cmd.exe 1 29->49         started        51 2 other processes 31->51 signatures8 process9 dnsIp10 78 185.225.73.67, 1050, 49699, 49701 MAYAKBG Germany 33->78 80 geoplugin.net 178.237.33.50, 49714, 49715, 49716 ATOM86-ASATOM86NL Netherlands 33->80 94 Deletes itself after installation 33->94 96 Writes to foreign memory regions 33->96 98 Maps a DLL or memory area into another process 33->98 100 Installs a global keyboard hook 33->100 53 cmd.exe 1 33->53         started        56 svchost.exe 33->56         started        58 conhost.exe 37->58         started        60 reg.exe 1 37->60         started        102 Disables UAC (registry) 39->102 104 Uses cmd line tools excessively to alter registry or file data 43->104 62 conhost.exe 43->62         started        64 reg.exe 1 43->64         started        66 conhost.exe 49->66         started        68 reg.exe 1 49->68         started        signatures11 process12 signatures13 118 Uses cmd line tools excessively to alter registry or file data 53->118 70 conhost.exe 53->70         started        72 reg.exe 1 53->72         started        process14
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a4da37e92ca54c8851ad144fba875b61e2018f69bbe43b11926d8f8d831b56f0/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2023-02-02 08:13:04 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
24 of 26 (92.31%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=utndp2jmuvgiqunncrh3vb23mhradd3jxpsdwemsnwhy3ay3k3ya._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:crypt evasion persistence rat trojan
Link:
https://tria.ge/reports/230203-x28ngsac78/
Behaviour
Modifies registry class
Modifies registry key
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
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
Deletes itself
Executes dropped EXE
Loads dropped DLL
Remcos
UAC bypass
Malware Config
C2 Extraction:
185.225.73.67:1050
Unpacked files
SH256 hash:
a4da37e92ca54c8851ad144fba875b61e2018f69bbe43b11926d8f8d831b56f0
MD5 hash:
2b8f487213f3da1f42779e22d7b02d1a
SHA1 hash:
77c96429d6facbd1900290c9cbfed378103b8e01
Detections:
Remcos
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/ad885e9b-6b89-40eb-9c74-30ba8b3b5aec/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a4da37e92ca5/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/a4da37e92ca54c8851ad144fba875b61e2018f69bbe43b11926d8f8d831b56f0

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_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Author:ditekSHen
Description:Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
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.

Web download

RemcosRAT

Executable exe a4da37e92ca54c8851ad144fba875b61e2018f69bbe43b11926d8f8d831b56f0

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2529332/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/360025/

Comments