MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4138dc6d4ea9f822aa3bac00c6304b9675c13b140fadb75736f21dd33e8dcba6. 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 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4138dc6d4ea9f822aa3bac00c6304b9675c13b140fadb75736f21dd33e8dcba6
SHA3-384 hash: 87c6295270eb638d38f89358a82743350677d06b00a93d86bbc3e19eb17933b4dd27a45f273040a85e26fea7e49b148b
SHA1 hash: c3e350932b41dcb054d7a9f13bbc2737556c4a33
MD5 hash: 74aeb06e0794803d32da34d34bd3c53a
humanhash: william-black-tango-steak
File name:z1567890987655700765678.bat
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:896'000 bytes
First seen:2023-12-20 00:26:07 UTC
Last seen:2023-12-20 02:15:35 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 12288:4SPiI08xMcAljwnazxDSFofcKWV6FFr83qyyW9cukKvaVZAjo/V:PPil8icEjwnCx1TWV6oc7w
Threatray 6 similar samples on MalwareBazaar
TLSH T1D715029023A1C4BAF94606BAF4F2C290372F2D56BBA6CD0C716EAD5FB8C2C171541E57
TrID 27.3% (.SCR) Windows screen saver (13097/50/3)
22.0% (.EXE) Win64 Executable (generic) (10523/12/4)
13.7% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
10.5% (.EXE) Win16 NE executable (generic) (5038/12/1)
9.4% (.EXE) Win32 Executable (generic) (4505/5/1)
Reporter FXOLabs
Tags:bat exe RemcosRAT

Intelligence

File Origin
# of uploads :
6
# of downloads :
319
Origin country :
BR BR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
z1567890987655700765678.bat
Verdict:
Malicious activity
Analysis date:
2023-12-20 00:27:37 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/ddd1a4e0-98a8-4f68-9968-deabb70c7513

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/468575/
Detection(s):
Porcupine.MSIL.GenKryptik.GRKD.199794.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Using the Windows Management Instrumentation requests
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Creating a file
Launching a process
Creating a process from a recently created file
Sending a custom TCP request
DNS request
Sending an HTTP GET request
Reading critical registry keys
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process
Blocking the User Account Control
Forced shutdown of a system process
Stealing user critical data
Enabling autorun by creating a file
Adding exclusions to Windows Defender
Adding an exclusion to Microsoft Defender
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
89%
Tags:
masquerade packed remcos
Link:
https://www.filescan.io/uploads/658234d6f4b6e5e16350ff72/reports/cb8eef1d-932f-40b1-b1d3-3f70636c00e6/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/4138dc6d4ea9f822aa3bac00c6304b9675c13b140fadb75736f21dd33e8dcba6
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.
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/173abe5e-0fd7-4e57-9070-e1cde65b47e9
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1364857
Signature
.NET source code contains process injector
.NET source code contains very large array initializations
.NET source code references suspicious native API functions
Adds a directory exclusion to Windows Defender
Adds extensions / path to Windows Defender exclusion list (Registry)
Allocates memory in foreign processes
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Disables UAC (registry)
Drops PE files with benign system names
Found malware configuration
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)
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
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: Remcos
Sigma detected: Schedule system process
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
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: 1364857 Sample: z1567890987655700765678.bat.exe Startdate: 20/12/2023 Architecture: WINDOWS Score: 100 59 Multi AV Scanner detection for domain / URL 2->59 61 Found malware configuration 2->61 63 Malicious sample detected (through community Yara rule) 2->63 65 11 other signatures 2->65 10 z1567890987655700765678.bat.exe 1 7 2->10         started        14 svchost.exe 2 4 2->14         started        16 svchost.exe 2->16         started        process3 file4 57 C:\Users\user\AppData\Roaming\svchost.exe, PE32 10->57 dropped 69 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 10->69 71 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 10->71 73 Drops PE files with benign system names 10->73 18 cmd.exe 1 10->18         started        20 cmd.exe 1 10->20         started        75 Multi AV Scanner detection for dropped file 14->75 77 Machine Learning detection for dropped file 14->77 79 Adds extensions / path to Windows Defender exclusion list (Registry) 14->79 81 Disables UAC (registry) 14->81 23 powershell.exe 22 14->23         started        25 CasPol.exe 14->25         started        83 Adds a directory exclusion to Windows Defender 16->83 27 powershell.exe 16->27         started        29 CasPol.exe 16->29         started        signatures5 process6 signatures7 31 svchost.exe 3 18->31         started        34 conhost.exe 18->34         started        36 timeout.exe 1 18->36         started        67 Uses schtasks.exe or at.exe to add and modify task schedules 20->67 38 conhost.exe 20->38         started        40 schtasks.exe 1 20->40         started        42 conhost.exe 23->42         started        44 conhost.exe 27->44         started        process8 signatures9 89 Writes to foreign memory regions 31->89 91 Allocates memory in foreign processes 31->91 93 Adds a directory exclusion to Windows Defender 31->93 95 Injects a PE file into a foreign processes 31->95 46 CasPol.exe 31->46         started        49 powershell.exe 31->49         started        process10 signatures11 85 Writes to foreign memory regions 46->85 87 Maps a DLL or memory area into another process 46->87 51 iexplore.exe 46->51         started        53 conhost.exe 49->53         started        process12 process13 55 conhost.exe 51->55         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4138dc6d4ea9f822aa3bac00c6304b9675c13b140fadb75736f21dd33e8dcba6
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4138dc6d4ea9f822aa3bac00c6304b9675c13b140fadb75736f21dd33e8dcba6/
Threat name:
Win32.Trojan.Remcos
Create hunting rule
Status:
Malicious
First seen:
2023-12-16 22:50:56 UTC
File Type:
PE (.Net Exe)
Extracted files:
28
AV detection:
18 of 37 (48.65%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ie4ny3kovh4cfkr3vqammmclsz24coyub6w3ovzw6io5gpunzota._file
Verdict:
malicious
Similar samples:
220be96884f744741958b96b4eb85d3b23637f457a71e836190b9b4546e45574
RemcosRAT
a297bb26a4850a94e38947f33b8419668d63d8b79922459b335f466d9fe653e1
RemcosRAT
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:dollar evasion persistence rat trojan
Link:
https://tria.ge/reports/231220-arrkwsfab8/
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
System policy modification
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Checks whether UAC is enabled
Maps connected drives based on registry
Checks BIOS information in registry
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Windows security modification
Looks for VMWare Tools registry key
Looks for VirtualBox Guest Additions in registry
Remcos
UAC bypass
Windows security bypass
Malware Config
C2 Extraction:
107.175.229.139:8087
Unpacked files
SH256 hash:
cbde5d184d8a0d52f5b6402ae26d37b982097ebee47103174110958320df0f60
MD5 hash:
faf38a7b81d314343edb6ea6a1d7a2c4
SHA1 hash:
6a13b745d8a34267868c05b8a7be181fee058fc8
Link:
https://www.unpac.me/results/f952d63c-82d5-4d4b-b444-7e85f91f43eb/
SH256 hash:
4138dc6d4ea9f822aa3bac00c6304b9675c13b140fadb75736f21dd33e8dcba6
MD5 hash:
74aeb06e0794803d32da34d34bd3c53a
SHA1 hash:
c3e350932b41dcb054d7a9f13bbc2737556c4a33
Link:
https://www.unpac.me/results/f952d63c-82d5-4d4b-b444-7e85f91f43eb/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4138dc6d4ea9/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/4138dc6d4ea9f822aa3bac00c6304b9675c13b140fadb75736f21dd33e8dcba6

File information

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

Malspam

RemcosRAT

Executable exe 4138dc6d4ea9f822aa3bac00c6304b9675c13b140fadb75736f21dd33e8dcba6

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/468575/

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