MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 81ac4a76d124f1620701c887de816c1d0a70d32a780525e7fcaabd7b829bc17a. 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: 11


Intelligence 11 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 81ac4a76d124f1620701c887de816c1d0a70d32a780525e7fcaabd7b829bc17a
SHA3-384 hash: 0f442f87b81bd82605dc4e66f1b2cf96fbd2f4f45cf24f8453612ff4ae2a25ddd909d648bbecb21864b5bae7dac8d53b
SHA1 hash: 91f23a8aba9acf564e048877c2a6442a7c01a0c3
MD5 hash: 69c2d78d263a8340074b5d1c4375dd07
humanhash: lemon-island-eighteen-delta
File name:Quote 290417.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:62'464 bytes
First seen:2022-09-01 00:19:55 UTC
Last seen:2022-09-01 00:30:41 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'610 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 1536:O9XMNK9uDUaQl+kzdC9GiZQWSwi/fUpS/fX/MNL:OiQ9uis1Jy///f/M5
TLSH T10653C0103BD4A93EF65E0A32ABE5C547667893412E574A263F7758872CA334E0EFC91C
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon 0c3259796961b24c (12 x RemcosRAT, 11 x Formbook, 6 x AgentTesla)
Reporter GovCERT_CH
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
292
Origin country :
n/a
Vendor Threat Intelligence
Detection:
zgRAT
Create hunting rule
Link:
https://www.capesandbox.com/analysis/307027/
Detection(s):
SecuriteInfo.com.Variant.Lazy.238897.12804.26498.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Sending an HTTP GET request
Launching a process
Creating a process with a hidden window
Sending a custom TCP request
Creating a file in the %AppData% subdirectories
Creating a file
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Forced shutdown of a system process
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/630ffacba7450371f693daea/reports/5c501af1-b4b7-4b6d-8801-ed54e9d1db35/overview
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/f2b9ea4d-83ef-4d05-951f-7f73bb0322eb
Result
Threat name:
AsyncRAT, Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1062162
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Encrypted powershell cmdline option found
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
Snort IDS alert for network traffic
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected AsyncRAT
Yara detected Generic Downloader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 694688 Sample: Quote 290417.exe Startdate: 01/09/2022 Architecture: WINDOWS Score: 100 47 Snort IDS alert for network traffic 2->47 49 Malicious sample detected (through community Yara rule) 2->49 51 Antivirus detection for URL or domain 2->51 53 9 other signatures 2->53 7 Quote 290417.exe 16 7 2->7         started        12 Owlwi.exe 14 4 2->12         started        14 Owlwi.exe 3 2->14         started        process3 dnsIp4 45 172.245.142.35, 49751, 49756, 49761 AS-COLOCROSSINGUS United States 7->45 37 C:\Users\user\AppData\Roaming\...\Owlwi.exe, PE32 7->37 dropped 39 C:\Users\user\...\Owlwi.exe:Zone.Identifier, ASCII 7->39 dropped 41 C:\Users\user\...\Quote 290417.exe.log, ASCII 7->41 dropped 55 Encrypted powershell cmdline option found 7->55 16 InstallUtil.exe 2 7->16         started        19 powershell.exe 18 7->19         started        21 InstallUtil.exe 7->21         started        57 Multi AV Scanner detection for dropped file 12->57 59 Machine Learning detection for dropped file 12->59 23 powershell.exe 14 12->23         started        25 InstallUtil.exe 12->25         started        27 powershell.exe 14->27         started        29 InstallUtil.exe 14->29         started        file5 signatures6 process7 dnsIp8 43 172.111.234.100, 5888 SOFTLAYERUS United States 16->43 31 conhost.exe 19->31         started        33 conhost.exe 23->33         started        35 conhost.exe 27->35         started        process9
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/81ac4a76d124f1620701c887de816c1d0a70d32a780525e7fcaabd7b829bc17a/
Threat name:
ByteCode-MSIL.Downloader.PsDownload
Create hunting rule
Status:
Malicious
First seen:
2022-08-31 18:25:49 UTC
File Type:
PE (.Net Exe)
Extracted files:
10
AV detection:
22 of 26 (84.62%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qgweu5wretywebybzcd55almdufhbuzkpacslz74vk6xxau3yf5a._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost persistence rat
Link:
https://tria.ge/reports/220901-amrp4afea2/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
Remcos
Malware Config
C2 Extraction:
172.111.234.100:5888
Unpacked files
SH256 hash:
81ac4a76d124f1620701c887de816c1d0a70d32a780525e7fcaabd7b829bc17a
MD5 hash:
69c2d78d263a8340074b5d1c4375dd07
SHA1 hash:
91f23a8aba9acf564e048877c2a6442a7c01a0c3
Link:
https://www.unpac.me/results/0ee269a9-e10f-4aa7-8b06-d251f8e00ca1/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/81ac4a76d124/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.35
Link:
https://yomi.yoroi.company/submissions/81ac4a76d124f1620701c887de816c1d0a70d32a780525e7fcaabd7b829bc17a

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:INDICATOR_EXE_Packed_SmartAssembly
Create hunting rule
Author:ditekSHen
Description:Detects executables packed with SmartAssembly
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

RemcosRAT

Executable exe 81ac4a76d124f1620701c887de816c1d0a70d32a780525e7fcaabd7b829bc17a

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/307027/

Comments