MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4246c71f963c26fb5243425abc893778b6ddf6c3dc0a71583eca79866878a828. 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: 14


Intelligence 14 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4246c71f963c26fb5243425abc893778b6ddf6c3dc0a71583eca79866878a828
SHA3-384 hash: 01ea9f9f6b161c4b9af1e007a211a72faa5ce8377b4555419edf143ac621fa095fbe09da934c512f7b13a4f0529aa110
SHA1 hash: ec331ed24e0a638ba728f400f2bc16a8247035d3
MD5 hash: e711d634632dc24d2e731013f9f5394e
humanhash: papa-kitten-october-nine
File name:Invoice-4536PND.pdf.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:626'928 bytes
First seen:2024-03-04 10:07:17 UTC
Last seen:2024-03-04 11:49:10 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash e221f4f7d36469d53810a4b5f9fc8966 (118 x GuLoader, 28 x RemcosRAT, 21 x Formbook)
ssdeep 12288:UlRLMvYT+jQxrXh6/RoTBlp17UpsPkrXgn648F5rcoq6OZ7mQ8H9:+QQqjiLoR+Bl01Xg98F5rc2OZ7mQ8
Threatray 8 similar samples on MalwareBazaar
TLSH T11DD4235BAA63E0FFE0A41E348D759FAAA5BB97C44411056F4B22376B3A237D38C1131D
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)
File icon (PE):PE icon
dhash icon b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter lowmal3
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:cigarrulleren
Issuer:cigarrulleren
Algorithm:sha256WithRSAEncryption
Valid from:2023-06-09T07:46:50Z
Valid to:2026-06-08T07:46:50Z
Serial number: 02a283abb680880ed935eb50dca0e306f6c8b311
Thumbprint Algorithm:SHA256
Thumbprint: da56229993f875c5b20dd970bf1ab2f7cb8457c0928acea257a43068fb008fe7
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
3
# of downloads :
409
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
4246c71f963c26fb5243425abc893778b6ddf6c3dc0a71583eca79866878a828.exe
Verdict:
Malicious activity
Analysis date:
2024-03-04 10:10:36 UTC
Tags:
formbook xloader stealer spyware
Link:
https://app.any.run/tasks/d8bd62a5-689c-4fb2-b47d-cb24f0645ac2

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Gen.Variant.Nemesis.30388.19471.13354.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a file
Launching a process
Running batch commands
Using the Windows Management Instrumentation requests
Creating a process from a recently created file
Unauthorized injection to a recently created process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
installer masquerade
Link:
https://www.filescan.io/uploads/65e59d84e6b0237f30ad47ed/reports/5759c857-22f2-4bb8-ab3a-e5c2fc244820/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_70%
Link:
https://www.hybrid-analysis.com/sample/4246c71f963c26fb5243425abc893778b6ddf6c3dc0a71583eca79866878a828
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/4b16a174-f12d-47b0-bd0c-4867b8856551
Result
Threat name:
FormBook, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1402431
Signature
Antivirus detection for URL or domain
Hides threads from debuggers
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
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
Obfuscated command line found
Powershell drops PE file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Suspicious Double Extension File Execution
Suspicious powershell command line found
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses an obfuscated file name to hide its real file extension (double extension)
Writes to foreign memory regions
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1402431 Sample: Invoice-4536PND.pdf.exe Startdate: 04/03/2024 Architecture: WINDOWS Score: 100 47 www.yhz40.top 2->47 49 www.vanestie.com 2->49 51 7 other IPs or domains 2->51 65 Malicious sample detected (through community Yara rule) 2->65 67 Antivirus detection for URL or domain 2->67 69 Multi AV Scanner detection for submitted file 2->69 71 5 other signatures 2->71 11 Invoice-4536PND.pdf.exe 34 2->11         started        signatures3 process4 file5 37 C:\Users\user\AppData\...\Hovedregningers.rve, ASCII 11->37 dropped 79 Suspicious powershell command line found 11->79 15 powershell.exe 20 11->15         started        signatures6 process7 file8 39 C:\Users\user\AppData\...\Tegltagenes.exe, PE32 15->39 dropped 57 Obfuscated command line found 15->57 59 Writes to foreign memory regions 15->59 61 Sample uses process hollowing technique 15->61 63 2 other signatures 15->63 19 Tegltagenes.exe 6 15->19         started        23 conhost.exe 15->23         started        25 cmd.exe 1 15->25         started        signatures9 process10 dnsIp11 53 drive.google.com 142.250.80.110, 443, 49737 GOOGLEUS United States 19->53 55 drive.usercontent.google.com 142.251.32.97, 443, 49738 GOOGLEUS United States 19->55 73 Multi AV Scanner detection for dropped file 19->73 75 Maps a DLL or memory area into another process 19->75 77 Hides threads from debuggers 19->77 27 GmvIIJCTMrNKFacDMVSWNZrzltB.exe 19->27 injected signatures12 process13 process14 29 SecEdit.exe 13 27->29         started        signatures15 81 Tries to steal Mail credentials (via file / registry access) 29->81 83 Tries to harvest and steal browser information (history, passwords, etc) 29->83 85 Writes to foreign memory regions 29->85 87 3 other signatures 29->87 32 GmvIIJCTMrNKFacDMVSWNZrzltB.exe 29->32 injected 35 firefox.exe 29->35         started        process16 dnsIp17 41 yhz40.top 156.224.90.133, 49739, 80 XIAOZHIYUN1-AS-APICIDCNETWORKUS Seychelles 32->41 43 www.baal.ltd 91.195.240.94, 49745, 49746, 49747 SEDO-ASDE Germany 32->43 45 2 other IPs or domains 32->45
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4246c71f963c26fb5243425abc893778b6ddf6c3dc0a71583eca79866878a828
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4246c71f963c26fb5243425abc893778b6ddf6c3dc0a71583eca79866878a828/
Threat name:
Win32.Trojan.Nemesis
Create hunting rule
Status:
Malicious
First seen:
2024-03-04 09:27:37 UTC
File Type:
PE (Exe)
Extracted files:
12
AV detection:
17 of 24 (70.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ijdmoh4whqtpwusdijnlzcjxpc3n35wd3qfhcwb6zj4ym2dyvaua._file
Verdict:
malicious
Similar samples:
26867f2c23465d6220bb9f81714c67d2769e54e4ebd0eb15ee3fa3d0dc3b6be3
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3e3ac1d0d519e933394b3c728713b102b9ca63d57bc2427591f4fccf0c9c012a
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7f6af80f59437303f1f0282e798c57619cc1c013cb08c66810595952558fdcc9
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96e8eb2604c81bbb31a16ccf186aa3a9990f01e03b59df7c29536293edfa5454
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976be3f04529b328e1fa9b0f173924c2a0dd3296734eb20fcd922b3171e5a547
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d0162a86e38114d2aeb0530bfca4d939cd4d15e5cc35d50cb64c20123f0f3204
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d4471111f0e92ea1d7760bd2cc6f75ce16bc8245d077edc47d56181f23a96cea
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ebe9964a660c6c7257506706957f6206903770579c92af9d0f0ae7f13f9676e1
GuLoader
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader persistence
Link:
https://tria.ge/reports/240304-l58bcagf97/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Legitimate hosting services abused for malware hosting/C2
Loads dropped DLL
Guloader,Cloudeye
Unpacked files
SH256 hash:
4246c71f963c26fb5243425abc893778b6ddf6c3dc0a71583eca79866878a828
MD5 hash:
e711d634632dc24d2e731013f9f5394e
SHA1 hash:
ec331ed24e0a638ba728f400f2bc16a8247035d3
Link:
https://www.unpac.me/results/4927a7e6-2205-421f-9be2-8390f8030633/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4246c71f963c/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/4246c71f963c26fb5243425abc893778b6ddf6c3dc0a71583eca79866878a828

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_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:PE_Potentially_Signed_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.

Malspam

GuLoader

Executable exe 4246c71f963c26fb5243425abc893778b6ddf6c3dc0a71583eca79866878a828

(this sample)

  
Delivery method
Distributed via e-mail attachment

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
CHECK_NXMissing Non-Executable Memory Protectioncritical
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh
Reviews
IDCapabilitiesEvidence
COM_BASE_APICan Download & Execute componentsole32.dll::CoCreateInstance
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteW
SHELL32.dll::SHFileOperationW
SHELL32.dll::SHGetFileInfoW
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessW
KERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.dll::LoadLibraryW
KERNEL32.dll::LoadLibraryA
KERNEL32.dll::LoadLibraryExW
KERNEL32.dll::GetDiskFreeSpaceW
KERNEL32.dll::GetCommandLineW
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileW
KERNEL32.dll::CreateDirectoryW
KERNEL32.dll::CreateFileW
KERNEL32.dll::DeleteFileW
KERNEL32.dll::MoveFileW
KERNEL32.dll::GetWindowsDirectoryW
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegCreateKeyExW
ADVAPI32.dll::RegDeleteKeyW
ADVAPI32.dll::RegOpenKeyExW
ADVAPI32.dll::RegQueryValueExW
ADVAPI32.dll::RegSetValueExW
WIN_USER_APIPerforms GUI ActionsUSER32.dll::AppendMenuW
USER32.dll::EmptyClipboard
USER32.dll::FindWindowExW
USER32.dll::OpenClipboard
USER32.dll::PeekMessageW
USER32.dll::CreateWindowExW

Comments