MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d684ff8578143c9ada565e08e1ac0204a5fd50c21bb27d206a96326381e0619c. 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: 10


Intelligence 10 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d684ff8578143c9ada565e08e1ac0204a5fd50c21bb27d206a96326381e0619c
SHA3-384 hash: 6d20bbd2e6dae04faca26f2d92294e35d727e0307ff419f33e9b026ad4793c3de40bf95ed3d7420c7a475fee3e792c96
SHA1 hash: 58f2f8fc04f4c3ee7517c3ef04b3c821e1c7d604
MD5 hash: 5b9585b7e924233738dbca263d217282
humanhash: twelve-monkey-emma-delaware
File name:NP46969-OVERSEAS .xlsx.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:719'600 bytes
First seen:2024-03-22 07:36:22 UTC
Last seen:2024-03-22 09:25:44 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 4f67aeda01a0484282e8c59006b0b352 (51 x GuLoader, 9 x RemcosRAT, 9 x VIPKeylogger)
ssdeep 12288:4o5vFoWHxS1tHz1UrAxqPVKxEozi22Qi3vI:4ojHxS6AAPISEQvI
Threatray 317 similar samples on MalwareBazaar
TLSH T144E469FE6C60B599FE79C2F626148970EB0A6C14F5103676623C72DBC9B988183D790F
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 827169697979b1b1 (5 x GuLoader, 1 x Formbook)
Reporter abuse_ch
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Svirs
Issuer:Svirs
Algorithm:sha256WithRSAEncryption
Valid from:2024-03-13T11:36:43Z
Valid to:2027-03-13T11:36:43Z
Serial number: 267f4d0bb1057fab2d20d1bbad8a753539740b09
Thumbprint Algorithm:SHA256
Thumbprint: eefd9f2be3dfdb19972820b3cda99dce5bd2a2d0099b9dd38f003aaf8c450641
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
347
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
d684ff8578143c9ada565e08e1ac0204a5fd50c21bb27d206a96326381e0619c.exe
Verdict:
Suspicious activity
Analysis date:
2024-03-22 08:06:17 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/d00a61b3-c813-413d-a69f-f4c3c94349c1

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

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
guloader installer lolbin masquerade overlay packed shell32
Link:
https://www.filescan.io/uploads/65fd35260ef6f5eba4961547/reports/a88f4ece-0595-4cbd-9c3c-8a21295d0d8e/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/d684ff8578143c9ada565e08e1ac0204a5fd50c21bb27d206a96326381e0619c
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/4d7f2d44-0521-4f23-b44c-bec9860994e1
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1413921
Signature
Check if machine is in data center or colocation facility
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Creates multiple autostart registry keys
Hides that the sample has been downloaded from the Internet (zone.identifier)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: New RUN Key Pointing to Suspicious Folder
Sigma detected: Suspicious Double Extension File Execution
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses an obfuscated file name to hide its real file extension (double extension)
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1413921 Sample: NP46969-OVERSEAS .xlsx.exe Startdate: 22/03/2024 Architecture: WINDOWS Score: 100 28 ip-api.com 2->28 30 drive.usercontent.google.com 2->30 32 2 other IPs or domains 2->32 48 Multi AV Scanner detection for dropped file 2->48 50 Multi AV Scanner detection for submitted file 2->50 52 Yara detected GuLoader 2->52 54 7 other signatures 2->54 7 NP46969-OVERSEAS .xlsx.exe 7 44 2->7         started        10 FTSKIaM.exe 35 2->10         started        13 FTSKIaM.exe 26 2->13         started        signatures3 process4 file5 26 C:\Users\user\AppData\Local\...\System.dll, PE32 7->26 dropped 15 NP46969-OVERSEAS .xlsx.exe 18 13 7->15         started        56 Multi AV Scanner detection for dropped file 10->56 signatures6 process7 dnsIp8 34 ip-api.com 208.95.112.1, 50001, 80 TUT-ASUS United States 15->34 36 drive.google.com 142.251.40.238, 443, 49998 GOOGLEUS United States 15->36 38 2 other IPs or domains 15->38 20 C:\Users\user\AppData\Roaming\...\FTSKIaM.exe, PE32 15->20 dropped 22 C:\Users\user\AppData\...\Cylindrosporium.exe, PE32 15->22 dropped 24 C:\Users\user\...\FTSKIaM.exe:Zone.Identifier, ASCII 15->24 dropped 40 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 15->40 42 Tries to steal Mail credentials (via file / registry access) 15->42 44 Creates multiple autostart registry keys 15->44 46 3 other signatures 15->46 file9 signatures10
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/d684ff8578143c9ada565e08e1ac0204a5fd50c21bb27d206a96326381e0619c
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d684ff8578143c9ada565e08e1ac0204a5fd50c21bb27d206a96326381e0619c/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Suspicious
First seen:
2024-03-21 23:33:27 UTC
File Type:
PE (Exe)
Extracted files:
7
AV detection:
13 of 23 (56.52%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=22cp7blycq6jvwswlyeodlacass72ugcdozh2idksyzghapamgoa._file
Verdict:
unknown
Similar samples:
1aba3ebf5fc7d6221270fa7e13713216e06b678b197524a35d3a5cd9b1e0d857
GuLoader
73f87dc14d15addd846f2073187ac64be665ce79f618fff31c981ac95a51d288
GuLoader
75bb54e0d27dfeb0efa4680d7136307f9a82edef662e9fc3c4339b05b3fe7079
GuLoader
763d73647ce03b99fdc5a43badfe0f4571e86998395d30f8f68d8042b8c83ace
GuLoader
8808e4e220fcda37bdb05b703e86053f88a6ebd68037d37ef89754c459d7ad2b
GuLoader
8d75ec453d1ff873f2aad8756a39f0c3ecb9addd6ba0a05e771acc9bbe0170ed
GuLoader
92e55159b6e18fb75e5aa6d39a9b37822619c9d31123894ade0f7c4544a045cb
GuLoader
b643d5ee1be492fcbfbfb4c9b9bf3da8460b74ab2097b96e6545318c92f2ee26
GuLoader
df1b0622c227d706845a398bafc28232e1a175e9595ad3a9db9fb2483834343c
GuLoader
+ 307 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader persistence
Link:
https://tria.ge/reports/240322-jftesaaa62/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Guloader,Cloudeye
Unpacked files
SH256 hash:
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e
MD5 hash:
3f176d1ee13b0d7d6bd92e1c7a0b9bae
SHA1 hash:
fe582246792774c2c9dd15639ffa0aca90d6fd0b
Link:
https://www.unpac.me/results/c2f0731f-03f2-4e2c-be01-d310ad0c8677/
SH256 hash:
d684ff8578143c9ada565e08e1ac0204a5fd50c21bb27d206a96326381e0619c
MD5 hash:
5b9585b7e924233738dbca263d217282
SHA1 hash:
58f2f8fc04f4c3ee7517c3ef04b3c821e1c7d604
Link:
https://www.unpac.me/results/c2f0731f-03f2-4e2c-be01-d310ad0c8677/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/d684ff857814/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.52
Link:
https://yomi.yoroi.company/submissions/d684ff8578143c9ada565e08e1ac0204a5fd50c21bb27d206a96326381e0619c

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: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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