MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 c527daf2491bb0c007246173bd7dee7926a01418ae3550f60f6971f2fb8caa94. 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: 14
| SHA256 hash: | c527daf2491bb0c007246173bd7dee7926a01418ae3550f60f6971f2fb8caa94 |
|---|---|
| SHA3-384 hash: | 739a15cf2717920011201f93e5c9ca6ac7ab832451d44de5abc1132d24a49fb1fb9eb58914761d6fb952d9d36edc7493 |
| SHA1 hash: | a75f8ed934a8525e09b8a8ff24cf8f49c9aba90c |
| MD5 hash: | 7752f357a75ddb3e3f1412f559ef2a7a |
| humanhash: | uranus-iowa-quiet-paris |
| File name: | sarexlogistics receipt document,pdf.exe |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 692'177 bytes |
| First seen: | 2024-06-26 08:48:33 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 3abe302b6d9a1256e6a915429af4ffd2 (271 x GuLoader, 38 x Formbook, 25 x Loki) |
| ssdeep | 12288:kH+/vBkZcYasAtiieQeCpqpydrYTDyumSuoZ2hQ:i+/JqcLNeCQyVe2u7Vsi |
| Threatray | 1'018 similar samples on MalwareBazaar |
| TLSH | T10FE4E617A21182E2C475BDB2CBCE59946A386D3E469EC16FB5B9F27B18F3351410BC8C |
| 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): |  |
| dhash icon | f03e9454652d259a (4 x GuLoader, 3 x Formbook) |
| Reporter |  abuse_ch |
| Tags: | exe GuLoader |
Intelligence
File Origin
# of uploads :
1
# of downloads :
353
Origin country :
NLVendor Threat Intelligence
Malware family:
guloader
ID:
1
File name:
c527daf2491bb0c007246173bd7dee7926a01418ae3550f60f6971f2fb8caa94.exe
Verdict:
Malicious activity
Analysis date:
2024-06-26 08:56:11 UTC
Tags:
guloader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Verdict:
Malicious
Score:
94.1%
Link:
Tags:
Encryption Execution Generic Network Stealth
Result
Verdict:
Clean
Maliciousness:
Behaviour
Creating a window
Creating a file in the %temp% subdirectories
Creating a process from a recently created file
Searching for the window
Launching a process
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
babar installer lolbin microsoft_visual_cc overlay packed shell32
Verdict:
Malicious
Labled as:
Trojan.Generic
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:
Malicious
Result
Threat name:
GuLoader
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Signature
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
Found suspicious powershell code related to unpacking or dynamic code loading
Initial sample is a PE file and has a suspicious name
Multi AV Scanner detection for submitted file
Sigma detected: Potential PowerShell Command Line Obfuscation
Sigma detected: Suspicious Script Execution From Temp Folder
Suspicious powershell command line found
Switches to a custom stack to bypass stack traces
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Very long command line found
Writes to foreign memory regions
Yara detected GuLoader
Behaviour
Behavior Graph:
Score:
91%
Verdict:
Malware
File Type:
PE
Threat name:
Win32.Trojan.Generic
Status:
Malicious
First seen:
2023-04-30 03:28:01 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
16 of 24 (66.67%)
Threat level:
2/5
Detection(s):
Suspicious file
Verdict:
malicious
Similar samples:
+ 1'008 additional samples on MalwareBazaar
Result
Malware family:
guloader
Score:
10/10
Tags:
family:guloader downloader execution
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: PowerShell
Enumerates physical storage devices
Program crash
Drops file in Program Files directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Checks QEMU agent file
Guloader,Cloudeye
Unpacked files
SH256 hash:
f095c96f8354738f2d272b7837dcde2b6c9e9abdca3efa91c114af87d7590453
MD5 hash:
24c7684f85c0e61d41c31766197d6061
SHA1 hash:
2afbed52e13fb8b1f0b3cb786a463400b208049a
SH256 hash:
c527daf2491bb0c007246173bd7dee7926a01418ae3550f60f6971f2fb8caa94
MD5 hash:
7752f357a75ddb3e3f1412f559ef2a7a
SHA1 hash:
a75f8ed934a8525e09b8a8ff24cf8f49c9aba90c
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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 |
|---|---|
| Author: | Arkbird_SOLG |
| Description: | Detect NSIS installer used for Buer loader |
| Rule name: | NSIS_April_2024 |
|---|---|
| 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.
No further information available
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
| ID | Title | Severity |
|---|---|---|
| CHECK_AUTHENTICODE | Missing Authenticode | high |
| CHECK_DLL_CHARACTERISTICS | Missing dll Security Characteristics (HIGH_ENTROPY_VA) | high |
Reviews
| ID | Capabilities | Evidence |
|---|---|---|
| AUTH_API | Manipulates User Authorization | ADVAPI32.dll::SetFileSecurityA |
| COM_BASE_API | Can Download & Execute components | ole32.dll::CoCreateInstance |
| SECURITY_BASE_API | Uses Security Base API | ADVAPI32.dll::AdjustTokenPrivileges |
| SHELL_API | Manipulates System Shell | SHELL32.dll::ShellExecuteExA SHELL32.dll::SHFileOperationA SHELL32.dll::SHGetFileInfoA |
| WIN32_PROCESS_API | Can Create Process and Threads | KERNEL32.dll::CreateProcessA ADVAPI32.dll::OpenProcessToken KERNEL32.dll::CloseHandle KERNEL32.dll::CreateThread |
| WIN_BASE_API | Uses Win Base API | KERNEL32.dll::LoadLibraryExA KERNEL32.dll::GetDiskFreeSpaceA KERNEL32.dll::GetCommandLineA |
| WIN_BASE_IO_API | Can Create Files | KERNEL32.dll::CopyFileA KERNEL32.dll::CreateDirectoryA KERNEL32.dll::CreateFileA KERNEL32.dll::DeleteFileA KERNEL32.dll::MoveFileExA KERNEL32.dll::MoveFileA |
| WIN_BASE_USER_API | Retrieves Account Information | ADVAPI32.dll::LookupPrivilegeValueA |
| WIN_REG_API | Can Manipulate Windows Registry | ADVAPI32.dll::RegCreateKeyExA ADVAPI32.dll::RegDeleteKeyA ADVAPI32.dll::RegOpenKeyExA ADVAPI32.dll::RegQueryValueExA ADVAPI32.dll::RegSetValueExA |
| WIN_USER_API | Performs GUI Actions | USER32.dll::AppendMenuA USER32.dll::EmptyClipboard USER32.dll::FindWindowExA USER32.dll::OpenClipboard USER32.dll::PeekMessageA USER32.dll::CreateWindowExA |
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