MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5644ffdefed81871ac28af49ae9bf45eee20fe6742da2b07f2c71badac020c1c. 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: 10


Intelligence 10 IOCs 1 YARA 12 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 5644ffdefed81871ac28af49ae9bf45eee20fe6742da2b07f2c71badac020c1c
SHA3-384 hash: 18109e4a11c436b322af307c53281378cfa6660434a2e2189a32863493493101d6e003d2b279b3b6f89f20023a76db93
SHA1 hash: 6acaffd1dd94af1f93a625158a6cf96797363d20
MD5 hash: 3b36fe43f9384fcbdfe4e1072890dd97
humanhash: london-yellow-twenty-eleven
File name:Factura Serfinanza023854786775241209783648129.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:3'455'488 bytes
First seen:2021-05-06 02:40:31 UTC
Last seen:2021-05-06 04:13:39 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'741 x AgentTesla, 19'604 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 3072:xLGzBa8q0ZTfkTTSK69IXUIFtLLk4+6UUdZ:xLGzkg7yTh69tSdp5dZ
TLSH EEF5E70A65F5BABEF1E61A240F89E2671B0F77E46934F93C04C577CAC35511A8AE6330
Reporter abuse_ch
Tags:exe RAT RemcosRAT


Avatar
abuse_ch
RemcosRAT C2:
186.169.43.144:3521

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
186.169.43.144:3521 https://threatfox.abuse.ch/ioc/29934/

Intelligence

File Origin
# of uploads :
3
# of downloads :
137
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Spynet
Create hunting rule
Link:
https://www.capesandbox.com/analysis/151177/
Detection(s):
SecuriteInfo.com.Artemis3B36FE43F938.1530.28310.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% subdirectories
Creating a process from a recently created file
Creating a process with a hidden window
Launching a service
Sending a custom TCP request
Deleting a recently created file
Launching a process
Running batch commands
Sending a UDP request
Adding an access-denied ACE
Creating a file in the %AppData% subdirectories
Enabling the 'hidden' option for recently created files
Creating a file
Launching the default Windows debugger (dwwin.exe)
Creating a window
DNS request
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process by context flags manipulation
Setting a global event handler for the keyboard
Connection attempt to an infection source
Adding exclusions to Windows Defender
Result
Verdict:
UNKNOWN
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:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/713313
Signature
.NET source code contains very large strings
Adds a directory exclusion to Windows Defender
C2 URLs / IPs found in malware configuration
Contains functionality to capture and log keystrokes
Contains functionality to hide a thread from the debugger
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Country aware sample found (crashes after keyboard check)
Detected Remcos RAT
Found malware configuration
Hides threads from debuggers
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
Sigma detected: WScript or CScript Dropper
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 405582 Sample: Factura Serfinanza023854786... Startdate: 06/05/2021 Architecture: WINDOWS Score: 100 80 databasepropersonombrecomercialideasearchwords.services 2->80 84 Found malware configuration 2->84 86 Malicious sample detected (through community Yara rule) 2->86 88 Multi AV Scanner detection for submitted file 2->88 90 14 other signatures 2->90 12 Factura Serfinanza023854786775241209783648129.exe 6 6 2->12         started        16 PxxoServicesTrialNet1.exe 2->16         started        18 PxxoServicesTrialNet1.exe 2->18         started        signatures3 process4 file5 74 C:\Users\user\AppData\...\AdvancedRun.exe, PE32 12->74 dropped 100 Adds a directory exclusion to Windows Defender 12->100 102 Hides threads from debuggers 12->102 104 Injects a PE file into a foreign processes 12->104 20 Factura Serfinanza023854786775241209783648129.exe 12->20         started        23 AdvancedRun.exe 1 12->23         started        25 cmd.exe 1 12->25         started        35 2 other processes 12->35 76 C:\Users\user\AppData\...\AdvancedRun.exe, PE32 16->76 dropped 27 AdvancedRun.exe 16->27         started        29 powershell.exe 16->29         started        31 cmd.exe 16->31         started        78 C:\Users\user\AppData\...\AdvancedRun.exe, PE32 18->78 dropped 33 AdvancedRun.exe 18->33         started        signatures6 process7 file8 66 C:\Users\user\...\PxxoServicesTrialNet1.exe, PE32 20->66 dropped 68 PxxoServicesTrialN...exe:Zone.Identifier, ASCII 20->68 dropped 70 C:\Users\user\AppData\Local\...\install.vbs, data 20->70 dropped 37 wscript.exe 20->37         started        39 AdvancedRun.exe 23->39         started        42 conhost.exe 25->42         started        44 timeout.exe 25->44         started        46 AdvancedRun.exe 27->46         started        48 conhost.exe 29->48         started        50 conhost.exe 31->50         started        52 conhost.exe 35->52         started        process9 dnsIp10 54 cmd.exe 37->54         started        82 192.168.2.1 unknown unknown 39->82 process11 process12 56 PxxoServicesTrialNet1.exe 54->56         started        60 conhost.exe 54->60         started        file13 72 C:\Users\user\AppData\...\AdvancedRun.exe, PE32 56->72 dropped 92 Multi AV Scanner detection for dropped file 56->92 94 Machine Learning detection for dropped file 56->94 96 Adds a directory exclusion to Windows Defender 56->96 98 2 other signatures 56->98 62 AdvancedRun.exe 56->62         started        signatures14 process15 process16 64 AdvancedRun.exe 62->64         started       
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/5644ffdefed81871ac28af49ae9bf45eee20fe6742da2b07f2c71badac020c1c/
Threat name:
ByteCode-MSIL.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2021-05-06 02:41:06 UTC
AV detection:
7 of 47 (14.89%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=kzcp7xx63amhdlbiv5e25g7ul3xcb7thilncwb7sy4n23lacbqoa._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos evasion persistence rat trojan
Link:
https://tria.ge/reports/210506-vefn775atx/
Behaviour
Delays execution with timeout.exe
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Windows security modification
Executes dropped EXE
Nirsoft
Modifies Windows Defender Real-time Protection settings
Remcos
Turns off Windows Defender SpyNet reporting
Windows security bypass
Malware Config
C2 Extraction:
databasepropersonombrecomercialideasearchwords.services:3521
Unpacked files
SH256 hash:
3da80bd8e18bf2ef5e28f5e2e0d2095b0d4e65391800ce18f9a18859d7beb220
MD5 hash:
5dbed7594d4c8d71c1882692e6776bf0
SHA1 hash:
8552a2f2afca501945fe57c1875970b6f777f709
Link:
https://www.unpac.me/results/cc7600f7-f3a5-4dba-b19b-6df3acfb9005/
SH256 hash:
a5f80d8bf75d584aecb0b9b7ce87534b530bb144239fcf0b7c3614176520f039
MD5 hash:
7396e52753ed658bed3607df742453ca
SHA1 hash:
8189aac93e109cca453358ecb0893697216647c3
Link:
https://www.unpac.me/results/cc7600f7-f3a5-4dba-b19b-6df3acfb9005/
SH256 hash:
af07fdbd4f929f6e83cf21fc8fb6569182fc03783fbbfa09d1d6a0afe5b13609
MD5 hash:
5928077f7cca2e3534ce66e261ddce82
SHA1 hash:
10c5562a91e043ba1b2f18bf572168a6e42c9a97
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/cc7600f7-f3a5-4dba-b19b-6df3acfb9005/
SH256 hash:
5644ffdefed81871ac28af49ae9bf45eee20fe6742da2b07f2c71badac020c1c
MD5 hash:
3b36fe43f9384fcbdfe4e1072890dd97
SHA1 hash:
6acaffd1dd94af1f93a625158a6cf96797363d20
Link:
https://www.unpac.me/results/cc7600f7-f3a5-4dba-b19b-6df3acfb9005/
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/5644ffdefed81871ac28af49ae9bf45eee20fe6742da2b07f2c71badac020c1c

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:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
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:pe_imphash
Create hunting rule
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:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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.

Cape
Cape
https://www.capesandbox.com/analysis/151177/

Comments