MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 83ff8817ce686209e0a3a63afb62ee80a662f33a3e465eea8a05e85573f727d7. 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: 13


Intelligence 13 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 83ff8817ce686209e0a3a63afb62ee80a662f33a3e465eea8a05e85573f727d7
SHA3-384 hash: 608359f13348ffe394d373da0de3955f26a9c2c16e83eb6e7be9100aff2964efbed90692e47ba1bdf47ca98cc510a781
SHA1 hash: 0b3ea3475d8892bcf07e2268c22455c684f0d06b
MD5 hash: a5d5a31f1cb8107cf72aefe172b1a3ac
humanhash: cup-cola-september-fish
File name:83ff8817ce686209e0a3a63afb62ee80a662f33a3e465eea8a05e85573f727d7
Download: download sample
Signature GuLoader
Create hunting rule
File size:494'513 bytes
First seen:2024-05-08 10:51:23 UTC
Last seen:2024-05-08 11:24:07 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 076b06e6a65c9b7cca5a61be0cd82165 (51 x GuLoader, 4 x AgentTesla, 4 x Formbook)
ssdeep 12288:/LkwkkHkkkDkkqkykkkkkkbkkkkkkkkkkkqkkfkPkgkkkkk9kkkk3ukkkk4khP0e:TkfkFB1BrY
Threatray 399 similar samples on MalwareBazaar
TLSH T1B6B48E4FBC405B7AC8A6C77825BF450566F5BC2AD3FB14092689F52CE1B26310B2ED4B
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 66fcf6fcacc04748 (2 x GuLoader)
Reporter adrian__luca
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
2
# of downloads :
335
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
83ff8817ce686209e0a3a63afb62ee80a662f33a3e465eea8a05e85573f727d7
Verdict:
Malicious activity
Analysis date:
2024-05-08 10:51:33 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/3feeda69-958d-4935-a148-503374cac04c

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.Malware-gen.10254.32534.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file
Searching for the window
Delayed reading of the file
Creating a file in the %temp% subdirectories
Searching for the Windows task manager window
Running batch commands
Creating a process with a hidden window
Launching many processes
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
guloader installer lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/663b59642808f0d610ced6c8/reports/70e3db5a-399a-4a61-b0d3-ed46b1b7fe57/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/83ff8817ce686209e0a3a63afb62ee80a662f33a3e465eea8a05e85573f727d7
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/070e11eb-4f28-4349-8bbb-538ac7dcca42
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1438210
Signature
Mass process execution to delay analysis
Multi AV Scanner detection for submitted file
Obfuscated command line found
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1438210 Sample: j4SPw1P5CF.exe Startdate: 08/05/2024 Architecture: WINDOWS Score: 100 40 drive.usercontent.google.com 2->40 42 drive.google.com 2->42 44 api.ipify.org 2->44 52 Multi AV Scanner detection for submitted file 2->52 54 Yara detected GuLoader 2->54 8 j4SPw1P5CF.exe 2 397 2->8         started        signatures3 process4 file5 34 C:\Users\user\...\Dybtstikkende.Kmp181, data 8->34 dropped 36 C:\Users\user\AppData\Local\...\nsExec.dll, PE32 8->36 dropped 38 C:\Users\user\AppData\Local\...\System.dll, PE32 8->38 dropped 56 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 8->56 58 Obfuscated command line found 8->58 60 Mass process execution to delay analysis 8->60 12 j4SPw1P5CF.exe 8->12         started        16 cmd.exe 1 8->16         started        18 cmd.exe 1 8->18         started        20 272 other processes 8->20 signatures6 process7 dnsIp8 46 drive.usercontent.google.com 142.251.167.132, 443, 50234 GOOGLEUS United States 12->46 48 drive.google.com 172.253.122.100, 443, 50233 GOOGLEUS United States 12->48 50 api.ipify.org 172.67.74.152, 443, 50235 CLOUDFLARENETUS United States 12->50 62 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 12->62 64 Tries to steal Mail credentials (via file / registry access) 12->64 66 Tries to harvest and steal ftp login credentials 12->66 68 Tries to harvest and steal browser information (history, passwords, etc) 12->68 22 conhost.exe 16->22         started        24 conhost.exe 18->24         started        26 conhost.exe 20->26         started        28 conhost.exe 20->28         started        30 conhost.exe 20->30         started        32 267 other processes 20->32 signatures9 process10
Score:
98%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/83ff8817ce686209e0a3a63afb62ee80a662f33a3e465eea8a05e85573f727d7
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/83ff8817ce686209e0a3a63afb62ee80a662f33a3e465eea8a05e85573f727d7/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2024-04-22 23:22:55 UTC
File Type:
PE (Exe)
Extracted files:
7
AV detection:
18 of 24 (75.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=qp7yqf6onbratyfduy5pwyxoqctgf4z2hzdf52ukaxufk47xe7lq._file
Verdict:
malicious
Similar samples:
0c76696416d07cc6dc0055a1ec29f796d7e9dab63fe26991b7b7a4ad2e8cd246
GuLoader
1081715a99eafd929af7f2c08c1d17b90c2c81dfd08230f613e168a49db37698
GuLoader
2bc90a1fdc41f3c106b518198f071f11c498ed91136435c22db1b557aead041b
GuLoader
3fb935f3b274dddf25a926967ceb573ad0f990bff966583157849545c60c42e4
GuLoader
6d4d55abaccc1b19903ceb6c96d760327bb9c87a744a8806bfb242d547c9e6e3
GuLoader
ef66ea0bcee19ccd3d2771a170ff218a3e43b27f1b18f24e08685cb4d3fe053a
GuLoader
+ 389 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla keylogger spyware stealer trojan
Link:
https://tria.ge/reports/240508-mydntsbd35/
Behaviour
Modifies system certificate store
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in System32 directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Legitimate hosting services abused for malware hosting/C2
Looks up external IP address via web service
Loads dropped DLL
Reads WinSCP keys stored on the system
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
AgentTesla
Unpacked files
SH256 hash:
fda0018ab182ac6025d2fc9a2efcce3745d1da21ce5141859f8286cf319a52ce
MD5 hash:
4d3b19a81bd51f8ce44b93643a4e3a99
SHA1 hash:
35f8b00e85577b014080df98bd2c378351d9b3e9
Link:
https://www.unpac.me/results/a8dce8c2-12c9-437a-8a67-70067e19020f/
SH256 hash:
1c2f19e57dc72587aa00800a498c5f581b7d6761dc13b24bcf287ea7bd5ca2bf
MD5 hash:
3eb4cd50dcb9f5981f5408578cb7fb70
SHA1 hash:
13b38cc104ba6ee22dc4dfa6e480e36587f4bc71
Detections:
win_flawedammyy_auto
Create hunting rule
Link:
https://www.unpac.me/results/a8dce8c2-12c9-437a-8a67-70067e19020f/
Parent samples :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 hash:
ea60f14cbd764de7259f8f5a8f64093c8a4940c46a1a5153b6f42fe019a2297c
MD5 hash:
efec1affbb89c110ad32aa350437f5d7
SHA1 hash:
1dc7bf27ad34dc73813e27cbd63d5853fa196edf
Detections:
win_flawedammyy_auto
Create hunting rule
Link:
https://www.unpac.me/results/a8dce8c2-12c9-437a-8a67-70067e19020f/
Parent samples :
46ccb3436fbd93182c0196510c4b8451e539560d2d68e1338db7720676e0b637
6fde4f26f7c8bdaabed77424faff317ffbe4ca5fd182db278a210065aa66a483
c5e3dc39412f2f8efb97c3c6bcdc235727caf646ee2ac7c23e77c11ce0783e15
83ff8817ce686209e0a3a63afb62ee80a662f33a3e465eea8a05e85573f727d7
aefb448faf8e4135fcf64b6beca74636d69c10e5e3cc04fa9883d8265e5bfc10
ce877733ee9e261e33073f983357f61b97a7b4a30800f70dd3a4edb729707f2f
1fbcae8d4a90832715ff4fff39141aee8afcb2c8a09d7fce0cb2c882c79b4b27
9bc70a2e37123deefafa303ca59ea0dd304b17e2f0288b3b6730104da0e0f6f1
7c50044058a5e6ca4e792e2573666f9426abef3f165789024effa1a1966651e5
1b159fa01a8af6dc08e1e371203362f5a9ba4cf4128c3c234f1e53d492ee0eab
04aea1458bbe0debfdc6cbd993d9d3ebf52e5742cac8d5ad53a44ac2c8010d12
c58de5f40be8fd760fc08b1ef7ae5a3f5771dbc214426156e3a21a89bb8303fc
74d6ad148e3cbc20e9ffdc0a98afb58d4ce813a30966b08d82cbc195535de1fe
542372832b12830cb655e1147ad87b01299e5ee3af5fb5e73b92e63ed7ff2c62
a275219d59c7a4d6af8647ab86a5fba4134aa15dacb327cada238d9abad7e6e3
SH256 hash:
83ff8817ce686209e0a3a63afb62ee80a662f33a3e465eea8a05e85573f727d7
MD5 hash:
a5d5a31f1cb8107cf72aefe172b1a3ac
SHA1 hash:
0b3ea3475d8892bcf07e2268c22455c684f0d06b
Link:
https://www.unpac.me/results/a8dce8c2-12c9-437a-8a67-70067e19020f/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/83ff8817ce68/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
GuLoader
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/83ff8817ce686209e0a3a63afb62ee80a662f33a3e465eea8a05e85573f727d7

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:NSIS_April_2024
Create hunting rule
Author:NDA0N
Description:Detects NSIS installers

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
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::LoadLibraryA
KERNEL32.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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