MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 bc83149fc8a7767a3b7ea3841f87ccfb068f8430b08fccbc31a2e24684d6f269. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: bc83149fc8a7767a3b7ea3841f87ccfb068f8430b08fccbc31a2e24684d6f269
SHA3-384 hash: 63421509495e02d89b03df020f73db894ac4c2db3fc60b804b69b58f3fd2f8db0e7b6ca40e4218b323cd781f9e405ab5
SHA1 hash: 7ce0380bbe9a60e49cc2fca2ef20125d89e663d2
MD5 hash: d5ca31fce0d54153f2072b81eb805a55
humanhash: sweet-sodium-king-zebra
File name:FRA.0038222.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:918'312 bytes
First seen:2024-05-23 16:36:08 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash b78ecf47c0a3e24a6f4af114e2d1f5de (300 x GuLoader, 23 x Formbook, 21 x RemcosRAT)
ssdeep 12288:aVcDbJfzoHFg6lIORVdsY46FBPSLJSO6s7O4lCkt0ywNQOWatBhP5:JDbJfzUu6vvdsedOJP6NwA7tTP
TLSH T1CE15AD06B7B48A53C10787338DA38BD56275EF54AE62970F3648B6196F713EF07822D2
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 f0e8717071716810 (3 x GuLoader)
Reporter James_inthe_box
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Lofting
Issuer:Lofting
Algorithm:sha256WithRSAEncryption
Valid from:2024-01-15T09:16:05Z
Valid to:2027-01-14T09:16:05Z
Serial number: 39ba1a93141483c185f8cf45a6dfd542d379a986
Thumbprint Algorithm:SHA256
Thumbprint: 40990658ba6d8dc24c83f25fb77a9b67e5394b57d33a2c6aeb625e5177b46c0e
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
343
Origin country :
US US
Vendor Threat Intelligence
Malware family:
guloader
Create hunting rule
ID:
1
File name:
bc83149fc8a7767a3b7ea3841f87ccfb068f8430b08fccbc31a2e24684d6f269.exe
Verdict:
Malicious activity
Analysis date:
2024-05-23 17:16:45 UTC
Tags:
guloader
Link:
https://app.any.run/tasks/95a62b3b-77a5-4bb2-af5b-ed5018f1bfe4

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.NSIS.MalwareX-gen.936.5726.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=664f711c02cf134c1c7f86a5win7simulatehigh_evasion
Tags:
Encryption Static Stealth Nsisinject
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file
Searching for the window
Creating a file in the %temp% subdirectories
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
installer lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/664f70b232eca5b280fc1f44/reports/bea4c20c-84fd-48d0-9a0f-468ed1cb00c3/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/bc83149fc8a7767a3b7ea3841f87ccfb068f8430b08fccbc31a2e24684d6f269
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/f00617b6-0e2d-49f8-8111-496460cd4b9c
Result
Threat name:
GuLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1446668
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Found direct / indirect Syscall (likely to bypass EDR)
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
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)
Uses runas.exe to run programs with evaluated privileges
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1446668 Sample: FRA.0038222.exe Startdate: 23/05/2024 Architecture: WINDOWS Score: 100 31 www.vicenc39-ns.store 2->31 33 www.vcayy.top 2->33 35 27 other IPs or domains 2->35 49 Snort IDS alert for network traffic 2->49 51 Malicious sample detected (through community Yara rule) 2->51 53 Antivirus detection for URL or domain 2->53 55 5 other signatures 2->55 10 FRA.0038222.exe 3 28 2->10         started        signatures3 process4 file5 29 C:\Users\user\AppData\Local\...\System.dll, PE32 10->29 dropped 13 FRA.0038222.exe 6 10->13         started        process6 dnsIp7 43 drive.usercontent.google.com 142.250.217.97, 443, 49789 GOOGLEUS United States 13->43 45 drive.google.com 142.251.215.238, 443, 49788 GOOGLEUS United States 13->45 67 Modifies the context of a thread in another process (thread injection) 13->67 69 Maps a DLL or memory area into another process 13->69 71 Queues an APC in another process (thread injection) 13->71 17 RAVCpl64.exe 13->17 injected signatures8 process9 signatures10 47 Found direct / indirect Syscall (likely to bypass EDR) 17->47 20 runas.exe 13 17->20         started        process11 signatures12 57 Tries to steal Mail credentials (via file / registry access) 20->57 59 Tries to harvest and steal browser information (history, passwords, etc) 20->59 61 Modifies the context of a thread in another process (thread injection) 20->61 63 Maps a DLL or memory area into another process 20->63 23 QbiQjLYwKPcuMwCAQzPcUWAduyaz.exe 20->23 injected 27 firefox.exe 20->27         started        process13 dnsIp14 37 www.shortfox.top 203.161.49.193, 49816, 49817, 49818 VNPT-AS-VNVNPTCorpVN Malaysia 23->37 39 www.beersekes.com 14.225.238.195, 49828, 49829, 49830 VNPT-AS-VNVIETNAMPOSTSANDTELECOMMUNICATIONSGROUPVN Viet Nam 23->39 41 7 other IPs or domains 23->41 65 Found direct / indirect Syscall (likely to bypass EDR) 23->65 signatures15
Score:
89%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/bc83149fc8a7767a3b7ea3841f87ccfb068f8430b08fccbc31a2e24684d6f269
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/bc83149fc8a7767a3b7ea3841f87ccfb068f8430b08fccbc31a2e24684d6f269/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2024-05-23 11:47:44 UTC
File Type:
PE (Exe)
Extracted files:
5
AV detection:
20 of 38 (52.63%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xsbrjh6iu53huo36uocb7b6m7mdi7bbqwch4zpbrulrenbgw6juq._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
formbook
Create hunting rule
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader
Link:
https://tria.ge/reports/240523-t4tesshc4t/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of UnmapMainImage
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
Loads dropped DLL
Guloader,Cloudeye
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/fd828dac-da84-427b-b726-11811413de80
Unpacked files
SH256 hash:
98bcd1dd88642f4dd36a300c76ebb1ddfbbbc5bfc7e3b6d7435dc6d6e030c13b
MD5 hash:
b8992e497d57001ddf100f9c397fcef5
SHA1 hash:
e26ddf101a2ec5027975d2909306457c6f61cfbd
Link:
https://www.unpac.me/results/6e9bffc3-61ae-4833-aa1c-3917b4f57599/
SH256 hash:
bc83149fc8a7767a3b7ea3841f87ccfb068f8430b08fccbc31a2e24684d6f269
MD5 hash:
d5ca31fce0d54153f2072b81eb805a55
SHA1 hash:
7ce0380bbe9a60e49cc2fca2ef20125d89e663d2
Link:
https://www.unpac.me/results/6e9bffc3-61ae-4833-aa1c-3917b4f57599/
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/bc83149fc8a7767a3b7ea3841f87ccfb068f8430b08fccbc31a2e24684d6f269

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_April_2024
Create hunting rule
Author:NDA0N
Description:Detects NSIS installers
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.

  
Delivery method
Other

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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