MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f31a1a4253e9c3ba4ca22968b9f6f805984346464e10910bb8c3dfd84b028558. 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: 13


Intelligence 13 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f31a1a4253e9c3ba4ca22968b9f6f805984346464e10910bb8c3dfd84b028558
SHA3-384 hash: 5b11b424af584afdd4e9d45e2f8f6334421e1417c1af657594d03525ef96cc4fb6b8b2cf1e3e5f1943033c326d1fce9a
SHA1 hash: fdfb4d5ef58f1571abf9c58a5aa653b6c17db758
MD5 hash: cafb43c9227c12d667df390b49f0055b
humanhash: king-butter-carbon-uranus
File name:f31a1a4253e9c3ba4ca22968b9f6f805984346464e10910bb8c3dfd84b028558
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'458'688 bytes
First seen:2024-04-05 11:40:40 UTC
Last seen:2024-04-05 12:24:37 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 948cc502fe9226992dce9417f952fce3 (1'182 x CredentialFlusher, 446 x Formbook, 231 x AgentTesla)
ssdeep 24576:uqDEvCTbMWu7rQYlBQcBiT6rprG8aeBTNlITfqKm/H5DwIn7hWiQGbSRTw:uTvC/MTQYxsWR7aeBT3SYHSYbSp
TLSH T14665D00233D1C062FFAB91734F5AF6115ABC69260123E62F13A81D7ABD705B1563E7A3
TrID 68.8% (.CPL) Windows Control Panel Item (generic) (57583/11/19)
12.5% (.EXE) Win64 Executable (generic) (10523/12/4)
6.0% (.EXE) Win16 NE executable (generic) (5038/12/1)
5.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.4% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon aae2f3e38383b629 (2'034 x Formbook, 1'183 x CredentialFlusher, 666 x AgentTesla)
Reporter adrian__luca
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
336
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
f31a1a4253e9c3ba4ca22968b9f6f805984346464e10910bb8c3dfd84b028558
Verdict:
No threats detected
Analysis date:
2024-04-05 11:40:20 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/38c77090-ec9c-424d-ab2e-b2602794bc9a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% directory
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
autoit fingerprint keylogger lolbin packed shell32
Link:
https://www.filescan.io/uploads/660fe35215f64ac50351d8c7/reports/d42210c1-0fb9-43c5-80b1-2aca97ce04d2/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/f31a1a4253e9c3ba4ca22968b9f6f805984346464e10910bb8c3dfd84b028558
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:
Malicious
Link:
https://analyze.intezer.com/analyses/f9dea0e7-cec5-48c8-a36f-1ed53da395a8
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1420812
Signature
Antivirus detection for URL or domain
Binary is likely a compiled AutoIt script file
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to inject code into remote processes
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
Detected Remcos RAT
Drops VBS files to the startup folder
Found API chain indicative of sandbox detection
Found malware configuration
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 submitted file
Sigma detected: Drops script at startup location
Sigma detected: Remcos
Sigma detected: WScript or CScript Dropper
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)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
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: 1420812 Sample: YHZj3QW0oh.exe Startdate: 05/04/2024 Architecture: WINDOWS Score: 100 36 many.ydns.eu 2->36 38 geoplugin.net 2->38 52 Multi AV Scanner detection for domain / URL 2->52 54 Found malware configuration 2->54 56 Malicious sample detected (through community Yara rule) 2->56 58 11 other signatures 2->58 8 YHZj3QW0oh.exe 6 2->8         started        12 wscript.exe 1 2->12         started        signatures3 process4 file5 30 C:\Users\user\AppData\Local\...\snails.exe, PE32 8->30 dropped 68 Binary is likely a compiled AutoIt script file 8->68 70 Found API chain indicative of sandbox detection 8->70 14 snails.exe 3 19 8->14         started        72 Windows Scripting host queries suspicious COM object (likely to drop second stage) 12->72 19 snails.exe 2 12->19         started        signatures6 process7 dnsIp8 40 many.ydns.eu 23.106.121.144, 1144, 49737, 49738 LEASEWEB-APAC-SIN-11LeasewebAsiaPacificpteltdSG Singapore 14->40 42 geoplugin.net 178.237.33.50, 49740, 80 ATOM86-ASATOM86NL Netherlands 14->42 32 C:\Users\user\AppData\Roaming\...\snails.vbs, data 14->32 dropped 34 C:\ProgramData\remcos\logs.dat, data 14->34 dropped 44 Contains functionality to bypass UAC (CMSTPLUA) 14->44 46 Detected Remcos RAT 14->46 48 Binary is likely a compiled AutoIt script file 14->48 50 11 other signatures 14->50 21 snails.exe 1 14->21         started        24 snails.exe 1 14->24         started        26 snails.exe 2 14->26         started        28 snails.exe 14->28         started        file9 signatures10 process11 signatures12 60 Binary is likely a compiled AutoIt script file 21->60 62 Tries to steal Instant Messenger accounts or passwords 21->62 64 Tries to steal Mail credentials (via file / registry access) 21->64 66 Tries to harvest and steal browser information (history, passwords, etc) 24->66
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/f31a1a4253e9c3ba4ca22968b9f6f805984346464e10910bb8c3dfd84b028558
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f31a1a4253e9c3ba4ca22968b9f6f805984346464e10910bb8c3dfd84b028558/
Threat name:
Win32.Trojan.Strab
Create hunting rule
Status:
Malicious
First seen:
2024-03-26 10:19:37 UTC
File Type:
PE (Exe)
Extracted files:
28
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=6mnbuqst5hb3utfcffult5xyawmegrsgjyijcc5yypp5qsycqvma._file
Verdict:
malicious
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:jnmanymen collection rat spyware stealer
Link:
https://tria.ge/reports/240405-ntek1aag7t/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
AutoIT Executable
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Drops startup file
Executes dropped EXE
Reads user/profile data of web browsers
NirSoft MailPassView
NirSoft WebBrowserPassView
Nirsoft
Remcos
Malware Config
C2 Extraction:
many.ydns.eu:1144
Unpacked files
SH256 hash:
8e9544745a9e84ab286e3076ef3716b89f703317736394950c9be81f84727967
MD5 hash:
4b749d6b8aba318a668cdafd7f315c60
SHA1 hash:
5b712a32010b275b6f43b907eda2ee75ffbfcbbc
Detections:
Remcos
Create hunting rule
win_remcos_w0
Create hunting rule
win_remcos_auto
Create hunting rule
malware_windows_remcos_rat
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Link:
https://www.unpac.me/results/49305f04-fa1f-4a45-9014-7db9a1155e8d/
Parent samples :
d81731825aace0973b57c123b8a3a625181e30927e2cbd5b429dc8fcf5b7617c
013c86c9eb7691e645d32336f93e0374552ed3b1674bbf3f7217c765db3bfb51
1b5ba1755ed43689d38dd0ece8c01b5fa25a21a16834eb9ce13ce7d7da8d1982
a4355c61babedeffc4ada9f90d46b5c526882a19ae18771733c7e05122a86500
f31a1a4253e9c3ba4ca22968b9f6f805984346464e10910bb8c3dfd84b028558
SH256 hash:
f31a1a4253e9c3ba4ca22968b9f6f805984346464e10910bb8c3dfd84b028558
MD5 hash:
cafb43c9227c12d667df390b49f0055b
SHA1 hash:
fdfb4d5ef58f1571abf9c58a5aa653b6c17db758
Detections:
AutoIT_Compiled
Create hunting rule
Link:
https://www.unpac.me/results/49305f04-fa1f-4a45-9014-7db9a1155e8d/
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/f31a1a4253e9c3ba4ca22968b9f6f805984346464e10910bb8c3dfd84b028558

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:AutoIT_Compiled
Create hunting rule
Author:@bartblaze
Description:Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious.
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:maldoc_find_kernel32_base_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)

File information

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

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high
CHECK_NXMissing Non-Executable Memory Protectioncritical
Reviews
IDCapabilitiesEvidence
AUTH_APIManipulates User AuthorizationADVAPI32.dll::AllocateAndInitializeSid
ADVAPI32.dll::CopySid
ADVAPI32.dll::FreeSid
ADVAPI32.dll::GetLengthSid
ADVAPI32.dll::GetTokenInformation
ADVAPI32.dll::GetAce
COM_BASE_APICan Download & Execute componentsole32.dll::CLSIDFromProgID
ole32.dll::CoCreateInstance
ole32.dll::CoCreateInstanceEx
ole32.dll::CoInitializeSecurity
ole32.dll::CreateStreamOnHGlobal
MULTIMEDIA_APICan Play MultimediaWINMM.dll::mciSendStringW
WINMM.dll::timeGetTime
WINMM.dll::waveOutSetVolume
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AddAce
ADVAPI32.dll::AdjustTokenPrivileges
ADVAPI32.dll::CheckTokenMembership
ADVAPI32.dll::DuplicateTokenEx
ADVAPI32.dll::GetAclInformation
ADVAPI32.dll::GetSecurityDescriptorDacl
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteExW
SHELL32.dll::ShellExecuteW
SHELL32.dll::SHFileOperationW
WIN32_PROCESS_APICan Create Process and ThreadsADVAPI32.dll::CreateProcessAsUserW
KERNEL32.dll::CreateProcessW
ADVAPI32.dll::CreateProcessWithLogonW
KERNEL32.dll::OpenProcess
ADVAPI32.dll::OpenProcessToken
ADVAPI32.dll::OpenThreadToken
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::SetSystemPowerState
KERNEL32.dll::LoadLibraryA
KERNEL32.dll::LoadLibraryW
KERNEL32.dll::LoadLibraryExW
KERNEL32.dll::GetDriveTypeW
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::WriteConsoleW
KERNEL32.dll::ReadConsoleW
KERNEL32.dll::SetStdHandle
KERNEL32.dll::GetConsoleCP
KERNEL32.dll::GetConsoleMode
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileExW
KERNEL32.dll::CopyFileW
KERNEL32.dll::CreateDirectoryW
KERNEL32.dll::CreateHardLinkW
IPHLPAPI.DLL::IcmpCreateFile
KERNEL32.dll::CreateFileW
WIN_BASE_USER_APIRetrieves Account InformationKERNEL32.dll::GetComputerNameW
ADVAPI32.dll::GetUserNameW
ADVAPI32.dll::LogonUserW
ADVAPI32.dll::LookupPrivilegeValueW
WIN_NETWORK_APISupports Windows NetworkingMPR.dll::WNetAddConnection2W
MPR.dll::WNetUseConnectionW
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegConnectRegistryW
ADVAPI32.dll::RegCreateKeyExW
ADVAPI32.dll::RegDeleteKeyW
ADVAPI32.dll::RegOpenKeyExW
ADVAPI32.dll::RegQueryValueExW
ADVAPI32.dll::RegSetValueExW
WIN_USER_APIPerforms GUI ActionsUSER32.dll::BlockInput
USER32.dll::CloseDesktop
USER32.dll::CreateMenu
USER32.dll::EmptyClipboard
USER32.dll::FindWindowExW
USER32.dll::FindWindowW

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