MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 280945c850b2ee81256b36dacdec35b2bbc147c3cba57b344cd50bf464d74f97. 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 27 File information Comments
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SHA256 hash: 280945c850b2ee81256b36dacdec35b2bbc147c3cba57b344cd50bf464d74f97
SHA3-384 hash: b4e2850f18db49e9c4828510a22d6c69f2922fd78709001d719285f89d80c73fa756abdfd43dd13ba37eb8621111d01f
SHA1 hash: c64eeaa0ddf23d176d9bb3a3ed4854baa9e240af
MD5 hash: 8aacb5bffc09002fafded8c5c251af07
humanhash: carolina-alpha-three-august
File name:fatu0009876500.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:628'717 bytes
First seen:2023-10-18 15:57:09 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f4639a0b3116c2cfc71144b88a929cfd (96 x GuLoader, 53 x Formbook, 37 x VIPKeylogger)
ssdeep 12288:RfL0Xs3uxBCvT5hwCRn50bw/POLjrtYdWMoLn1iZZxUW5:RfL0Xs9vT7pRebw/POPiNoLn4I8
Threatray 434 similar samples on MalwareBazaar
TLSH T1D1D423A5B272D1B6CCE322B1886DE1512EA5D97C94CC970793C13F0C68B3911A47FE6B
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon d2e8ecb2b2a2b282 (106 x AgentTesla, 106 x Formbook, 24 x RedLineStealer)
Reporter abuse_ch
Tags:exe RAT RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
345
Origin country :
NL NL
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/455739/
Detection(s):
SecuriteInfo.com.FileRepMalware.25961.24328.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Delayed reading of the file
Creating a window
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a file in the %AppData% subdirectories
Сreating synchronization primitives
Setting a keyboard event handler
Sending a custom TCP request
DNS request
Creating a file
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 by context flags manipulation
Unauthorized injection to a recently created process
Stealing user critical data
Gathering data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control installer lolbin overlay packed remcos shell32
Link:
https://www.filescan.io/uploads/6530008e31e7dae3d7a763d7/reports/0f82334c-4623-4f1d-81ef-e8e3ea7e57bb/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/280945c850b2ee81256b36dacdec35b2bbc147c3cba57b344cd50bf464d74f97
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
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/a33df4f9-7778-49f5-998e-6392d61fa571
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
n/a
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1328141
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to inject code into remote processes
Contains functionality to modify clipboard data
Contains functionality to register a low level keyboard hook
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
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Found malware configuration
Installs a global keyboard hook
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
Sigma detected: Remcos
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Tries to steal Mail credentials (via file registry)
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1328141 Sample: fatu0009876500.exe Startdate: 18/10/2023 Architecture: WINDOWS Score: 100 47 geoplugin.net 2->47 67 Found malware configuration 2->67 69 Malicious sample detected (through community Yara rule) 2->69 71 Antivirus detection for URL or domain 2->71 73 7 other signatures 2->73 9 fatu0009876500.exe 17 2->9         started        12 nwwrbbkgg.exe 2->12         started        15 nwwrbbkgg.exe 2->15         started        signatures3 process4 file5 43 C:\Users\user\AppData\Local\Temp\omwgn.exe, PE32 9->43 dropped 17 omwgn.exe 1 2 9->17         started        75 Multi AV Scanner detection for dropped file 12->75 77 Contains functionality to bypass UAC (CMSTPLUA) 12->77 79 Contains functionalty to change the wallpaper 12->79 83 5 other signatures 12->83 21 nwwrbbkgg.exe 12->21         started        81 Maps a DLL or memory area into another process 15->81 23 nwwrbbkgg.exe 15->23         started        25 nwwrbbkgg.exe 15->25         started        signatures6 process7 file8 41 C:\Users\user\AppData\...\nwwrbbkgg.exe, PE32 17->41 dropped 59 Multi AV Scanner detection for dropped file 17->59 61 Contains functionality to bypass UAC (CMSTPLUA) 17->61 63 Tries to steal Mail credentials (via file registry) 17->63 65 9 other signatures 17->65 27 omwgn.exe 3 16 17->27         started        signatures9 process10 dnsIp11 49 80.76.51.172, 49712, 49713, 8087 CLOUDCOMPUTINGDE Bulgaria 27->49 51 geoplugin.net 178.237.33.50, 49714, 80 ATOM86-ASATOM86NL Netherlands 27->51 45 C:\ProgramData\remcos\logs.dat, data 27->45 dropped 85 Maps a DLL or memory area into another process 27->85 87 Installs a global keyboard hook 27->87 32 omwgn.exe 1 27->32         started        35 omwgn.exe 1 27->35         started        37 omwgn.exe 2 27->37         started        39 omwgn.exe 27->39         started        file12 signatures13 process14 signatures15 53 Tries to steal Instant Messenger accounts or passwords 32->53 55 Tries to steal Mail credentials (via file / registry access) 32->55 57 Tries to harvest and steal browser information (history, passwords, etc) 35->57
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/280945c850b2ee81256b36dacdec35b2bbc147c3cba57b344cd50bf464d74f97
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/280945c850b2ee81256b36dacdec35b2bbc147c3cba57b344cd50bf464d74f97/
Threat name:
Win32.Backdoor.Remcos
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Status:
Malicious
First seen:
2023-10-18 11:27:10 UTC
File Type:
PE (Exe)
Extracted files:
3
AV detection:
21 of 34 (61.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=faeulscqwlxicjllg3nm33bvwk54cr6dzosxwncm2uf7izgxj6lq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
13c527233819f76ce94c4ab839838a213acd727de5cae5660222a5c4ddd8d5b4
RemcosRAT
1b06a2398764f23e43dd171d49500cdaa3251ea195ce2c6fc4dfc1067955bf3e
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1ce13b1a107d66487c04da7180452270eebd76b7f0bcd1df37512fd1306d6656
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3bdd69de010f0f5eab2291127a6645fb8ed19f279276a6e7bf1122cf1937d61c
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483d7f7379d43c9fb3effb226cb58a443f48105bda3a9a6310a76729d7c1b3bd
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4f4a8ff83672c8134227742b12e228e512d32e3c3dabb8e96bdc6b28628d3d26
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887171e762ec83f7c3f9d12c11742c7e05e9382db50a9fe3268d266215708bf4
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b96df82e2a9e14b2854a68e6645598e494aa818801a18384f2d81a2ff514824e
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ea9723cd4dfeb319cedc75c0dd4cb5fa326b995580aee939085780092aafcda9
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f578f28a8a61cc7c6aa866daeb630e2f7d7a6bf4ab54a5a9a3962bcb1a5ed931
RemcosRAT
+ 424 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost collection persistence rat spyware stealer
Link:
https://tria.ge/reports/231018-tehl1afh21/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Adds Run key to start application
Reads user/profile data of web browsers
Executes dropped EXE
Loads dropped DLL
NirSoft MailPassView
NirSoft WebBrowserPassView
Nirsoft
Remcos
Malware Config
C2 Extraction:
80.76.51.172:8087
Unpacked files
SH256 hash:
280945c850b2ee81256b36dacdec35b2bbc147c3cba57b344cd50bf464d74f97
MD5 hash:
8aacb5bffc09002fafded8c5c251af07
SHA1 hash:
c64eeaa0ddf23d176d9bb3a3ed4854baa9e240af
Link:
https://www.unpac.me/results/c966c7e4-10d8-44d7-88e6-2f2829c6a1f9/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/280945c850b2/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/280945c850b2ee81256b36dacdec35b2bbc147c3cba57b344cd50bf464d74f97

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:BLOWFISH_Constants
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Author:phoul (@phoul)
Description:Look for Blowfish constants
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:iexplorer_remcos
Create hunting rule
Author:iam-py-test
Description:Detect iexplorer being taken over by Remcos
Rule name:INDICATOR_EXE_Packed_MPress
Create hunting rule
Author:ditekSHen
Description:Detects executables built or packed with MPress PE compressor
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
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Author:ditekSHen
Description:Detects executables referencing many email and collaboration clients. Observed in information stealers
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:maldoc_find_kernel32_base_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:maldoc_getEIP_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:QbotStuff
Create hunting rule
Author:anonymous
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:TeslaCryptPackedMalware
Create hunting rule
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
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.
Rule name:win_remcos_rat_unpacked
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:win_remcos_w0
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:yarahub_win_remcos_rat_unpacked_aug_2023
Create hunting rule
Author:Matthew @ Embee_Research
Rule name:yara_template
Create hunting rule

File information

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

Malspam

RemcosRAT

Executable exe 280945c850b2ee81256b36dacdec35b2bbc147c3cba57b344cd50bf464d74f97

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/455739/

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