MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 af21146a2dde58a679dc4186bdc6d4827caeb7150851da43aec36f4a662b4d01. 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: 9


Intelligence 9 IOCs YARA 2 File information Comments

SHA256 hash: af21146a2dde58a679dc4186bdc6d4827caeb7150851da43aec36f4a662b4d01
SHA3-384 hash: ced8bfd56c4c2ec65fe252ded73a2fa37434eb483274b46e9ba039b76d27c1d2a9b8f8aaf5926298a9172861f51c9135
SHA1 hash: 4eea886b3f34a71be23fd6f5877db438525e682d
MD5 hash: eff3e5107a8d2d0fe55c2a8ca29bd081
humanhash: yellow-freddie-pizza-floor
File name:51089742.exe
Download: download sample
Signature RemcosRAT
File size:18'432 bytes
First seen:2022-07-18 18:01:12 UTC
Last seen:2022-07-18 18:43:49 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 384:mWlQ7n4L760IAJ9yf0mSIISSSSSISSSpvKACPOQ:jl04X615VCGQ
Threatray 1'905 similar samples on MalwareBazaar
TLSH T16C82D7CB92F64A23FAA5D33C582A29474F35E96C78A1B25B35C151CE7823B8087DD358
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 0096cc714d86aa00 (18 x RemcosRAT, 14 x Formbook, 7 x AgentTesla)
Reporter GovCERT_CH
Tags:exe RemcosRAT

Intelligence


File Origin
# of uploads :
2
# of downloads :
241
Origin country :
n/a
Vendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Launching a process
Creating a process with a hidden window
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Creating a file in the %AppData% subdirectories
Creating a file
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Sending an HTTP GET request to an infection source
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
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.
Result
Threat name:
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Delayed program exit found
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 domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Snort IDS alert for network traffic
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected Generic Downloader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
behaviorgraph top1 signatures2 2 Behavior Graph ID: 668498 Sample: 51089742.exe Startdate: 18/07/2022 Architecture: WINDOWS Score: 100 56 Snort IDS alert for network traffic 2->56 58 Multi AV Scanner detection for domain / URL 2->58 60 Malicious sample detected (through community Yara rule) 2->60 62 8 other signatures 2->62 7 51089742.exe 16 7 2->7         started        12 Xcfeur.exe 14 4 2->12         started        14 Xcfeur.exe 3 2->14         started        process3 dnsIp4 46 45.137.22.118, 49753, 49771, 49804 ROOTLAYERNETNL Netherlands 7->46 38 C:\Users\user\AppData\Roaming\...\Xcfeur.exe, PE32 7->38 dropped 40 C:\Users\user\...\Xcfeur.exe:Zone.Identifier, ASCII 7->40 dropped 42 C:\Users\user\AppData\...\51089742.exe.log, ASCII 7->42 dropped 64 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 7->64 66 Encrypted powershell cmdline option found 7->66 68 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 7->68 16 InstallUtil.exe 7->16         started        19 InstallUtil.exe 2 7->19         started        22 powershell.exe 15 7->22         started        70 Multi AV Scanner detection for dropped file 12->70 72 Machine Learning detection for dropped file 12->72 24 powershell.exe 14 12->24         started        26 InstallUtil.exe 12->26         started        28 powershell.exe 14->28         started        30 InstallUtil.exe 14->30         started        file5 signatures6 process7 dnsIp8 48 Contains functionality to steal Chrome passwords or cookies 16->48 50 Contains functionality to inject code into remote processes 16->50 52 Contains functionality to steal Firefox passwords or cookies 16->52 54 Delayed program exit found 16->54 44 172.111.234.100, 5888 SOFTLAYERUS United States 19->44 32 conhost.exe 22->32         started        34 conhost.exe 24->34         started        36 conhost.exe 28->36         started        signatures9 process10
Threat name:
ByteCode-MSIL.Downloader.PsDownload
Status:
Malicious
First seen:
2022-07-15 10:02:45 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
20 of 26 (76.92%)
Threat level:
  3/5
Result
Malware family:
Score:
  10/10
Tags:
family:remcos botnet:remotehost persistence rat
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:
af21146a2dde58a679dc4186bdc6d4827caeb7150851da43aec36f4a662b4d01
MD5 hash:
eff3e5107a8d2d0fe55c2a8ca29bd081
SHA1 hash:
4eea886b3f34a71be23fd6f5877db438525e682d
Please note that we are no longer able to provide a coverage score for Virus Total.

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:pe_imphash
Rule name:Skystars_Malware_Imphash
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 af21146a2dde58a679dc4186bdc6d4827caeb7150851da43aec36f4a662b4d01

(this sample)

  
Delivery method
Distributed via e-mail attachment

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