MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1f7d1d7a237efaaba7789cf8f56c69c01f5f5200a4ffa01d738d2337413f7ba0. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 1f7d1d7a237efaaba7789cf8f56c69c01f5f5200a4ffa01d738d2337413f7ba0
SHA3-384 hash: 5b8ff7df0d158feb6db11e3dc351353aaa829c5df5fd4ec807d8fb8f3b4730ab74544dfaccf0c38baaedd6ecb1af35d7
SHA1 hash: 5cdb70842b8e336451da2d631ced6f5ed5501713
MD5 hash: 09bd2b971f77405dae8919459eb4b73f
humanhash: arkansas-minnesota-white-freddie
File name:2025.07.215·pdf.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:781'288 bytes
First seen:2025-07-21 19:53:01 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash ced282d9b261d1462772017fe2f6972b (127 x Formbook, 113 x GuLoader, 70 x RemcosRAT)
ssdeep 12288:Z7qJcArT6RrWEVvK/jXqyTOOhYEI4lhdcLPpQiuHVByZD0935UmG:43T6bVC2yTOOq4JcjyDyZD093K
TLSH T190F423B07464FC53CB86923047F6DDB69FBF3A1A82905A178F1E4E5F314A5E3950B882
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10522/11/4)
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)
Magika pebin
dhash icon f8e4d2cae6e460e2 (2 x GuLoader)
Reporter smica83
Tags:exe GuLoader HUN signed

Code Signing Certificate

Organisation:Mundgodt
Issuer:Mundgodt
Algorithm:sha256WithRSAEncryption
Valid from:2025-06-29T10:16:47Z
Valid to:2026-10-02T10:16:47Z
Serial number: 66cef318c6e80dc4a9bc3fe1f1fcd275e75ce495
Thumbprint Algorithm:SHA256
Thumbprint: 067164886b78613ae347e782a270eb9d231ff6fb6534564243ef2127c0b3f36a
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
41
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
2025.07.215·pdf.exe
Verdict:
No threats detected
Analysis date:
2025-07-21 19:54:49 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/c6657a5f-1471-445f-a492-73c46d323f57

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/16169/
Verdict:
Malicious
Score:
81.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=687e9ab72f623871a5f1775c
Tags:
underscore obfuscate injection xtreme
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Searching for the window
Creating a file in the %temp% subdirectories
Launching a process
Using the Windows Management Instrumentation requests
Creating a file
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/1f7d1d7a237efaaba7789cf8f56c69c01f5f5200a4ffa01d738d2337413f7ba0
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/6184fccb-58f6-47b7-9100-d0fc4a971ba5
Result
Threat name:
GuLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1741582
Signature
AI detected suspicious PE digital signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Early bird code injection technique detected
Found suspicious powershell code related to unpacking or dynamic code loading
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
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 dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Powershell drops PE file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Suspicious Script Execution From Temp Folder
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
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: 1741582 Sample: 2025.07.215#U00b7pdf.exe Startdate: 21/07/2025 Architecture: WINDOWS Score: 100 38 www.checkurl.xyz 2->38 40 www.truyensexnganhay.icu 2->40 42 13 other IPs or domains 2->42 54 Suricata IDS alerts for network traffic 2->54 56 Antivirus / Scanner detection for submitted sample 2->56 58 Multi AV Scanner detection for submitted file 2->58 62 5 other signatures 2->62 11 2025.07.215#U00b7pdf.exe 2 27 2->11         started        signatures3 60 Performs DNS queries to domains with low reputation 38->60 process4 file5 32 C:\Users\user\AppData\Local\...\Riglers.Unt, Unicode 11->32 dropped 14 powershell.exe 30 11->14         started        process6 file7 34 C:\Users\user\...\Frstegradspolynomiet.exe, PE32 14->34 dropped 36 Frstegradspolynomiet.exe:Zone.Identifier, ASCII 14->36 dropped 80 Early bird code injection technique detected 14->80 82 Writes to foreign memory regions 14->82 84 Sample uses process hollowing technique 14->84 86 4 other signatures 14->86 18 Frstegradspolynomiet.exe 6 14->18         started        22 conhost.exe 14->22         started        signatures8 process9 dnsIp10 44 drive.usercontent.google.com 142.250.80.97, 443, 49766 GOOGLEUS United States 18->44 46 drive.google.com 142.251.32.110, 443, 49765 GOOGLEUS United States 18->46 64 Antivirus detection for dropped file 18->64 66 Multi AV Scanner detection for dropped file 18->66 68 Maps a DLL or memory area into another process 18->68 70 Switches to a custom stack to bypass stack traces 18->70 24 5T48ItWSZHiWrS.exe 18->24 injected signatures11 process12 dnsIp13 48 sas-safesafety.cloud 195.110.124.133, 49796, 49797, 49798 REGISTER-ASIT Italy 24->48 50 www.offerupnow.com 104.18.36.175, 49784, 49785, 49786 CLOUDFLARENETUS United States 24->50 52 6 other IPs or domains 24->52 27 SearchProtocolHost.exe 13 24->27         started        process14 signatures15 72 Tries to steal Mail credentials (via file / registry access) 27->72 74 Tries to harvest and steal browser information (history, passwords, etc) 27->74 76 Modifies the context of a thread in another process (thread injection) 27->76 78 2 other signatures 27->78 30 firefox.exe 27->30         started        process16
Score:
97%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/1f7d1d7a237efaaba7789cf8f56c69c01f5f5200a4ffa01d738d2337413f7ba0
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable PE (Portable Executable) Win 32 Exe x86
Link:
https://app.malva.re/file/09bd2b971f77405dae8919459eb4b73f
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/1f7d1d7a237efaaba7789cf8f56c69c01f5f5200a4ffa01d738d2337413f7ba0/
Verdict:
Malicious
Threat:
Trojan.NSIS.Makoob
Link:
https://tip.neiki.dev/file/1f7d1d7a237efaaba7789cf8f56c69c01f5f5200a4ffa01d738d2337413f7ba0
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2025-07-21 09:56:45 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
14 of 24 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=d56r26rdp35kxj3ytt4pk3djyapv6uqaut72ahltrurtoqj7poqa._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery execution installer rat spyware stealer trojan
Link:
https://tria.ge/reports/250721-yl5sbsbn4y/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
NSIS installer
Command and Scripting Interpreter: PowerShell
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in System32 directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Legitimate hosting services abused for malware hosting/C2
Loads dropped DLL
Formbook payload
Formbook
Formbook family
Verdict:
Malicious
Tags:
loader guloader
YARA:
NSIS_GuLoader_July_2024
Link:
https://app.threat.zone/submission/cd2d99a3-47ec-4433-a217-4b342470b1ec
Unpacked files
SH256 hash:
1f7d1d7a237efaaba7789cf8f56c69c01f5f5200a4ffa01d738d2337413f7ba0
MD5 hash:
09bd2b971f77405dae8919459eb4b73f
SHA1 hash:
5cdb70842b8e336451da2d631ced6f5ed5501713
Link:
https://www.unpac.me/results/9acda22b-d892-485f-8b1b-8c9df55242d7/
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/1f7d1d7a237efaaba7789cf8f56c69c01f5f5200a4ffa01d738d2337413f7ba0

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: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
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/16169/

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::ShellExecuteExA
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

Comments