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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940. 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


GuLoader


Vendor detections: 15


Intelligence 15 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940
SHA3-384 hash: 8e67ebb94fdc0aeb30ec8b2555a0868ddc4bb92511b5426894f0a373c969497dfae69a549099c0a699fae1965a57ef3e
SHA1 hash: 9e31f25cd0c0cf37a92a61ebd87293b519da5534
MD5 hash: 9be2bb8f46192a7cf7006587c0e95d54
humanhash: three-equal-enemy-black
File name:PURCHASE ORDER 03.05.2024.PDF.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:641'736 bytes
First seen:2024-08-17 14:12:55 UTC
Last seen:2024-08-18 15:49:40 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash b78ecf47c0a3e24a6f4af114e2d1f5de (310 x GuLoader, 23 x Formbook, 21 x RemcosRAT)
ssdeep 12288:naxvaBAHu5sn0ulSRNQeILTPNRLZi8s7exFe2WM:a9aBAObRNVI/PNxzxFMM
Threatray 1'778 similar samples on MalwareBazaar
TLSH T166D412E13BB89AE1DBA1C5BEBED59D7996B8FC100CC50427F22C7F6F19361149B0520A
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) (4504/4/1)
Reporter nickkuechel
Tags:exe GuLoader RAT remcos signed

Code Signing Certificate

Organisation:Bathythermogram Unlistening Optagelsesprvens
Issuer:Bathythermogram Unlistening Optagelsesprvens
Algorithm:sha256WithRSAEncryption
Valid from:2023-11-18T04:43:12Z
Valid to:2026-11-17T04:43:12Z
Serial number: 07c6c1ac59087b0eadb1d8bc53da96888a8a9dff
Thumbprint Algorithm:SHA256
Thumbprint: 1cfe07af1a4cc2826931918d88acfaa3a5bc2762f2bcffd7fe211626d145a608
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
3
# of downloads :
510
Origin country :
US US
Vendor Threat Intelligence
Malware family:
guloader
Create hunting rule
ID:
1
File name:
PURCHASE ORDER 03.05.2024.PDF.exe
Verdict:
Malicious activity
Analysis date:
2024-08-17 14:17:42 UTC
Tags:
guloader loader rat remcos remote evasion keylogger
Link:
https://app.any.run/tasks/fa3a4bb8-1e18-4edd-a468-32214bcbf36d

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.FileRepMalware.14691.3090.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66c0aff0b35234d5cc65f5dc
Tags:
Encryption Static Stealth Malware
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
installer lolbin masquerade microsoft_visual_cc overlay packed shell32
Link:
https://www.filescan.io/uploads/66c0aff0b6cfdb0a9ea0220e/reports/23b133b6-070c-4f72-9ee7-18c3db409343/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/8ae48024-086c-4e40-a6f7-88bd62e55f81
Result
Threat name:
Remcos, GuLoader
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1494213
Signature
AI detected suspicious sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Detected Remcos RAT
Found malware configuration
Found suspicious powershell code related to unpacking or dynamic code loading
Initial sample is a PE file and has a suspicious name
Installs a global keyboard hook
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Powershell drops PE file
Sample is not signed and drops a device driver
Sigma detected: Remcos
Sigma detected: Suspicious Double Extension File Execution
Sigma detected: Suspicious Double Extension Files
Sigma detected: Wab/Wabmig Unusual Parent Or Child Processes
Suricata IDS alerts for network traffic
Suspicious powershell command line found
Switches to a custom stack to bypass stack traces
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)
Writes to foreign memory regions
Yara detected GuLoader
Yara detected Remcos RAT
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1494213 Sample: PURCHASE ORDER 03.05.2024.PDF.exe Startdate: 17/08/2024 Architecture: WINDOWS Score: 100 45 geoplugin.net 2->45 47 Suricata IDS alerts for network traffic 2->47 49 Found malware configuration 2->49 51 Antivirus detection for URL or domain 2->51 53 15 other signatures 2->53 9 PURCHASE ORDER 03.05.2024.PDF.exe 2 30 2->9         started        signatures3 process4 file5 33 C:\Users\user\AppData\Local\...\Anskaffet.Sys, ASCII 9->33 dropped 67 Suspicious powershell command line found 9->67 69 Sample is not signed and drops a device driver 9->69 13 powershell.exe 20 9->13         started        signatures6 process7 file8 35 C:\...\PURCHASE ORDER 03.05.2024.PDF.exe, PE32 13->35 dropped 37 PURCHASE ORDER 03....exe:Zone.Identifier, ASCII 13->37 dropped 71 Writes to foreign memory regions 13->71 73 Found suspicious powershell code related to unpacking or dynamic code loading 13->73 75 Powershell drops PE file 13->75 17 wab.exe 3 15 13->17         started        22 conhost.exe 13->22         started        signatures9 process10 dnsIp11 39 103.67.162.233, 49738, 49739, 9462 AARNET-AS-APAustralianAcademicandResearchNetworkAARNe unknown 17->39 41 geoplugin.net 178.237.33.50, 49740, 80 ATOM86-ASATOM86NL Netherlands 17->41 43 103.67.162.225, 49737, 80 AARNET-AS-APAustralianAcademicandResearchNetworkAARNe unknown 17->43 31 C:\ProgramData\remcos\logs.dat, data 17->31 dropped 55 Detected Remcos RAT 17->55 57 Maps a DLL or memory area into another process 17->57 59 Installs a global keyboard hook 17->59 24 wab.exe 1 17->24         started        27 wab.exe 1 17->27         started        29 wab.exe 14 17->29         started        file12 signatures13 process14 signatures15 61 Tries to steal Instant Messenger accounts or passwords 24->61 63 Tries to harvest and steal browser information (history, passwords, etc) 24->63 65 Tries to steal Mail credentials (via file / registry access) 27->65
Score:
97%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2024-08-15 16:26:02 UTC
File Type:
PE (Exe)
Extracted files:
5
AV detection:
17 of 24 (70.83%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=jrquu2nox2lvmlijybofwcg3oc5hzoqi6zuy4wuh7scua7rpxfaa._file
Verdict:
malicious
Similar samples:
5ed5d59a7c41e1f8a8e5b0926189ae54610558297b6b6edf04449c06771fbaef
GuLoader
86badcc31e244c64134acf60235f8dd10dc19ea3e30cccf8dc4760dc9f308733
GuLoader
aa69a4dd3203b34b4a1dfdf334ba8b655768f6e6c46165a095497b45222580b5
GuLoader
ad7402719ef6f58ea1164d420b00bbc8f15109d7ce46527b6aa7b424151430c4
GuLoader
c2c6dbfb6b0c03a22473c7f2f6cbfe0bbf500c795b920ddeb37c27af7de76d93
GuLoader
d4a04769d4bd4b35a1e14846840667c4f949833d66a19791cde5f0024c33eed3
GuLoader
f3a22e965f778a9b4072a659166407e283688a20492feff37818f61b969efa96
GuLoader
+ 1'768 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost collection credential_access discovery execution rat stealer
Link:
https://tria.ge/reports/240817-rjd39ssfkp/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Command and Scripting Interpreter: PowerShell
Credentials from Password Stores: Credentials from Web Browsers
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Remcos
Malware Config
C2 Extraction:
103.67.162.233:9462
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/6cc01850-37e1-4eb5-9ea4-7034a1545ed7
Unpacked files
SH256 hash:
4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940
MD5 hash:
9be2bb8f46192a7cf7006587c0e95d54
SHA1 hash:
9e31f25cd0c0cf37a92a61ebd87293b519da5534
Link:
https://www.unpac.me/results/bbdabc9a-9d65-4818-ac0f-26c3eb8460b6/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4c614a69aebe/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/4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940

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:Detect_SliverFox_String
Create hunting rule
Author:huoji
Description:Detect files is `SliverFox` malware
Rule name:Ins_NSIS_Buer_Nov_2020_1
Create hunting rule
Author:Arkbird_SOLG
Description:Detect NSIS installer used for Buer loader
Rule name:NSIS_GuLoader
Create hunting rule
Author:NDA0E
Description:Detects GuLoader using NSIS
Rule name:NSIS_GuLoader_July_2024
Create hunting rule
Author:NDA0E
Description:Detects GuLoader packed with NSIS installer
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits

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_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high
Reviews
IDCapabilitiesEvidence
AUTH_APIManipulates User AuthorizationADVAPI32.dll::SetFileSecurityA
COM_BASE_APICan Download & Execute componentsole32.dll::CoCreateInstance
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AdjustTokenPrivileges
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteA
SHELL32.dll::SHFileOperationA
SHELL32.dll::SHGetFileInfoA
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessA
ADVAPI32.dll::OpenProcessToken
KERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.dll::LoadLibraryExA
KERNEL32.dll::GetDiskFreeSpaceA
KERNEL32.dll::GetCommandLineA
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileA
KERNEL32.dll::CreateDirectoryA
KERNEL32.dll::CreateFileA
KERNEL32.dll::DeleteFileA
KERNEL32.dll::MoveFileExA
KERNEL32.dll::MoveFileA
WIN_BASE_USER_APIRetrieves Account InformationADVAPI32.dll::LookupPrivilegeValueA
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegCreateKeyExA
ADVAPI32.dll::RegDeleteKeyA
ADVAPI32.dll::RegOpenKeyExA
ADVAPI32.dll::RegQueryValueExA
ADVAPI32.dll::RegSetValueExA
WIN_USER_APIPerforms GUI ActionsUSER32.dll::AppendMenuA
USER32.dll::EmptyClipboard
USER32.dll::FindWindowExA
USER32.dll::OpenClipboard
USER32.dll::PeekMessageA
USER32.dll::CreateWindowExA

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