MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cfa3c71c41d7a69fdfa223a92ec677067613c69b2b2627d760cda587725bfbf0. 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: 11


Intelligence 11 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: cfa3c71c41d7a69fdfa223a92ec677067613c69b2b2627d760cda587725bfbf0
SHA3-384 hash: d268b211a7be49c122d4d02531ff960bcaa28b12cf0bb2af69022f67bec25fbf7093d444c0cb663ccc888811b015d380
SHA1 hash: af5d8cfa73b77d96d3a489f5961cdab87c8339be
MD5 hash: 0190a49f09dc90c7dc61959581be1e9f
humanhash: blue-jupiter-sierra-pasta
File name:Grundforbedre39.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:786'800 bytes
First seen:2024-03-18 13:17:25 UTC
Last seen:2024-03-18 15:29:30 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash e2a592076b17ef8bfb48b7e03965a3fc (385 x GuLoader, 58 x RemcosRAT, 40 x AgentTesla)
ssdeep 12288:LqLg193/433+TE58vkyFfgN5B8B/5FsfecVB0kh3ObwMB8aqEEbViGCyQRy1/6dy:Qg193w5uRa5BO5Fo9BbBoZyQqNbbfN/
TLSH T136F4232096826061F0E1D4B11FF7F753D93599E8C222EA1E1B711A79398DB02CB3637B
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 adrian__luca
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Sciot
Issuer:Sciot
Algorithm:sha256WithRSAEncryption
Valid from:2024-02-01T01:07:33Z
Valid to:2027-01-31T01:07:33Z
Serial number: 58a8a66edd4ddf633b143ec9bd20d65ae54b43f6
Thumbprint Algorithm:SHA256
Thumbprint: c354aa4aa0fc1f12a4bd219883e2c567c667eaa5cca9f01389ef15aa52cfc295
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
327
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
cfa3c71c41d7a69fdfa223a92ec677067613c69b2b2627d760cda587725bfbf0.exe
Verdict:
Malicious activity
Analysis date:
2024-03-18 13:34:47 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/52d93f1f-618d-492f-9741-ab2dfeee33b1

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.Evo-gen.13373.6000.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% subdirectories
Searching for the window
Creating a file in the %temp% subdirectories
Delayed reading of the file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
installer lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/65f83f1f757c624818b24da1/reports/71c72499-0091-4c6f-9559-4cc53dfa670f/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/cfa3c71c41d7a69fdfa223a92ec677067613c69b2b2627d760cda587725bfbf0
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:
Unknown
Link:
https://analyze.intezer.com/analyses/8620fd5b-25ca-4691-9812-7ea6145c1400
Result
Threat name:
GuLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1410990
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
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 submitted file
Queues an APC in another process (thread injection)
Snort IDS alert for network traffic
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1410990 Sample: Grundforbedre39.exe Startdate: 18/03/2024 Architecture: WINDOWS Score: 100 29 www.wbyzm5.buzz 2->29 31 www.tyc8099a.com 2->31 33 24 other IPs or domains 2->33 45 Snort IDS alert for network traffic 2->45 47 Malicious sample detected (through community Yara rule) 2->47 49 Antivirus detection for URL or domain 2->49 51 4 other signatures 2->51 10 Grundforbedre39.exe 7 55 2->10         started        signatures3 process4 file5 27 C:\Users\user\AppData\Local\...\System.dll, PE32 10->27 dropped 13 Grundforbedre39.exe 6 10->13         started        process6 dnsIp7 41 drive.usercontent.google.com 142.250.65.161, 443, 49758 GOOGLEUS United States 13->41 43 drive.google.com 142.251.41.14, 443, 49757 GOOGLEUS United States 13->43 61 Maps a DLL or memory area into another process 13->61 17 aBVmlEGlXzPgSgzWbUWNbhsRlSOqo.exe 13->17 injected signatures8 process9 process10 19 netiougc.exe 13 17->19         started        signatures11 53 Tries to steal Mail credentials (via file / registry access) 19->53 55 Tries to harvest and steal browser information (history, passwords, etc) 19->55 57 Writes to foreign memory regions 19->57 59 3 other signatures 19->59 22 aBVmlEGlXzPgSgzWbUWNbhsRlSOqo.exe 19->22 injected 25 firefox.exe 19->25         started        process12 dnsIp13 35 guiguigohost.com 195.110.124.133, 49829, 49830, 49831 REGISTER-ASIT Italy 22->35 37 www.manupaint.com 46.30.215.63, 49787, 49788, 49789 ONECOMDK Denmark 22->37 39 8 other IPs or domains 22->39
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/cfa3c71c41d7a69fdfa223a92ec677067613c69b2b2627d760cda587725bfbf0
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/cfa3c71c41d7a69fdfa223a92ec677067613c69b2b2627d760cda587725bfbf0/
Threat name:
Win32.Trojan.InjectorX
Create hunting rule
Status:
Malicious
First seen:
2024-03-13 00:59:59 UTC
File Type:
PE (Exe)
Extracted files:
9
AV detection:
9 of 38 (23.68%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=z6r4ohcb26tj7x5ceous5rtxaz3bhru3fmtcpv3azwsyo4s37pya._file
Verdict:
malicious
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/240318-qjzjjaac5w/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Legitimate hosting services abused for malware hosting/C2
Loads dropped DLL
Unpacked files
SH256 hash:
2e226715419a5882e2e14278940ee8ef0aa648a3ef7af5b3dc252674111962bc
MD5 hash:
a4dd044bcd94e9b3370ccf095b31f896
SHA1 hash:
17c78201323ab2095bc53184aa8267c9187d5173
Link:
https://www.unpac.me/results/fe436eb4-9eb3-401d-92ca-8471ee9cba36/
SH256 hash:
cfa3c71c41d7a69fdfa223a92ec677067613c69b2b2627d760cda587725bfbf0
MD5 hash:
0190a49f09dc90c7dc61959581be1e9f
SHA1 hash:
af5d8cfa73b77d96d3a489f5961cdab87c8339be
Link:
https://www.unpac.me/results/fe436eb4-9eb3-401d-92ca-8471ee9cba36/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/cfa3c71c41d7/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/cfa3c71c41d7a69fdfa223a92ec677067613c69b2b2627d760cda587725bfbf0

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

File information

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

Malspam

GuLoader

Executable exe cfa3c71c41d7a69fdfa223a92ec677067613c69b2b2627d760cda587725bfbf0

(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
Reviews
IDCapabilitiesEvidence
COM_BASE_APICan Download & Execute componentsole32.dll::CoCreateInstance
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AdjustTokenPrivileges
ADVAPI32.dll::SetFileSecurityW
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteW
SHELL32.dll::SHFileOperationW
SHELL32.dll::SHGetFileInfoW
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessW
ADVAPI32.dll::OpenProcessToken
KERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.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::MoveFileExW
WIN_BASE_USER_APIRetrieves Account InformationADVAPI32.dll::LookupPrivilegeValueW
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