MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c44904bfb8b44d8071f33359f824028597145f76bd1a6baf86d91679215e3c7d. 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: 12


Intelligence 12 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c44904bfb8b44d8071f33359f824028597145f76bd1a6baf86d91679215e3c7d
SHA3-384 hash: b9211b81e7929c1600cd0e010fc96d6aa198d5562eecee855391aef4e508dbaefb5347d1662bdb8637948d58d0e0050e
SHA1 hash: 76649fb41dc760d4c9ad8be23e239fcb7b0e2418
MD5 hash: 93d1942c204022e792af256d0ccbe8e5
humanhash: winter-princess-sixteen-autumn
File name:cuenta para pago1.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:826'296 bytes
First seen:2024-03-18 13:17:13 UTC
Last seen:2024-03-18 15:29:27 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash e2a592076b17ef8bfb48b7e03965a3fc (385 x GuLoader, 58 x RemcosRAT, 40 x AgentTesla)
ssdeep 12288:7qL1BIckrqvvW+ziaB/5FsfecWGClPW3ObwMB8aqEEbViGCyQRy1/6dzgA6zZxfV:A8ckmHN5Fo+GClPgBoZyQqNbbfNP
Threatray 34 similar samples on MalwareBazaar
TLSH T13405230253534061F8E2C8B149B5E3A2D438BAD8D329D60E6B7425B9765FF62CE2533F
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 b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter adrian__luca
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Solacers
Issuer:Solacers
Algorithm:sha256WithRSAEncryption
Valid from:2023-06-08T00:41:04Z
Valid to:2026-06-07T00:41:04Z
Serial number: 60380fd1d1389917e43b142d7968f4113b427534
Thumbprint Algorithm:SHA256
Thumbprint: 85fb8efd8690e8b768c88f9acf3cbf799abb9d9f3dcdaa65e4bf9cbd935ab2da
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
319
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
c44904bfb8b44d8071f33359f824028597145f76bd1a6baf86d91679215e3c7d.exe
Verdict:
Malicious activity
Analysis date:
2024-03-18 13:49:48 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/848d6dc6-84bd-4a16-9d25-ab5904c3d766

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.Evo-gen.3606.24786.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% subdirectories
Searching for the window
Creating a file in the %temp% subdirectories
Delayed reading of the file
Launching a process
Moving a file to the Program Files subdirectory
Replacing files
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
installer lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/65f83f17869de776ad042033/reports/7e2b02f5-a233-4d55-a40b-f91616a68a6e/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/c44904bfb8b44d8071f33359f824028597145f76bd1a6baf86d91679215e3c7d
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/5594f595-a89f-4541-959b-039c9ca015d3
Result
Threat name:
GuLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1410998
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
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)
Writes to foreign memory regions
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1410998 Sample: cuenta para pago1.exe Startdate: 18/03/2024 Architecture: WINDOWS Score: 100 30 www.stellerechoes.xyz 2->30 32 xiefly.shop 2->32 34 23 other IPs or domains 2->34 48 Snort IDS alert for network traffic 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 Antivirus detection for URL or domain 2->52 56 4 other signatures 2->56 10 cuenta para pago1.exe 7 55 2->10         started        signatures3 54 Performs DNS queries to domains with low reputation 30->54 process4 file5 28 C:\Users\user\AppData\Local\...\System.dll, PE32 10->28 dropped 13 cuenta para pago1.exe 6 10->13         started        process6 dnsIp7 44 drive.google.com 142.250.65.174, 443, 49803 GOOGLEUS United States 13->44 46 drive.usercontent.google.com 142.251.41.1, 443, 49804 GOOGLEUS United States 13->46 66 Maps a DLL or memory area into another process 13->66 17 YRrrNrIQCTKNXVoSiuJzTSdqxJTSo.exe 13->17 injected signatures8 process9 process10 19 rasautou.exe 13 17->19         started        dnsIp11 36 154.55.135.138, 80 COGENT-174US United States 19->36 58 Tries to steal Mail credentials (via file / registry access) 19->58 60 Tries to harvest and steal browser information (history, passwords, etc) 19->60 62 Writes to foreign memory regions 19->62 64 3 other signatures 19->64 23 YRrrNrIQCTKNXVoSiuJzTSdqxJTSo.exe 19->23 injected 26 firefox.exe 19->26         started        signatures12 process13 dnsIp14 38 globalworld-travel.com 109.234.166.81, 49844, 49845, 49846 O2SWITCHFR France 23->38 40 teenpattimasterapp.org 84.32.84.32, 49828, 49829, 49830 NTT-LT-ASLT Lithuania 23->40 42 10 other IPs or domains 23->42
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/c44904bfb8b44d8071f33359f824028597145f76bd1a6baf86d91679215e3c7d
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c44904bfb8b44d8071f33359f824028597145f76bd1a6baf86d91679215e3c7d/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2024-03-12 13:23:54 UTC
File Type:
PE (Exe)
Extracted files:
9
AV detection:
14 of 24 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=yreqjp5ywrgya4ptgnm7qjacqwlrix3wxungxl4g3elhsik6hr6q._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
37950119cdd0165154841c1fa0803dacccb63012561ea77cb11a787e2c0fa588
GuLoader
614ae605266b9829b5577ebd8562f5fadb2ef82337597d32e54c8ace9f1ea25c
GuLoader
6cf311a17be329c440e20a86db84c0d03597e977279411faaf7bf2806a206078
GuLoader
70f27cc87397701a73835625b0ee8caf3ef97b506554f2a7f65c2c08afd264f7
GuLoader
dfa384f6136c43639f6c66766ca81c245e65a70fcf92015656b1cd7a579a3647
GuLoader
e156c4e8e53c6b93166fea54fb521d9eb8bc74143ad52697a28809f5639205cf
GuLoader
e54350487bda76835619ccc44ff79db38db5183f544efbf33159cfd707bcdb75
GuLoader
+ 24 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader
Link:
https://tria.ge/reports/240318-qjyx1ahf34/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
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
Unpacked files
SH256 hash:
2e226715419a5882e2e14278940ee8ef0aa648a3ef7af5b3dc252674111962bc
MD5 hash:
a4dd044bcd94e9b3370ccf095b31f896
SHA1 hash:
17c78201323ab2095bc53184aa8267c9187d5173
Link:
https://www.unpac.me/results/e7fe639f-c715-423a-bc19-7b73bf953d46/
SH256 hash:
c44904bfb8b44d8071f33359f824028597145f76bd1a6baf86d91679215e3c7d
MD5 hash:
93d1942c204022e792af256d0ccbe8e5
SHA1 hash:
76649fb41dc760d4c9ad8be23e239fcb7b0e2418
Link:
https://www.unpac.me/results/e7fe639f-c715-423a-bc19-7b73bf953d46/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c44904bfb8b4/report/overview.html
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/c44904bfb8b44d8071f33359f824028597145f76bd1a6baf86d91679215e3c7d

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: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.

Malspam

GuLoader

Executable exe c44904bfb8b44d8071f33359f824028597145f76bd1a6baf86d91679215e3c7d

(this sample)

  
Delivery method
Distributed via e-mail attachment

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
COM_BASE_APICan Download & Execute componentsole32.dll::CoCreateInstance
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AdjustTokenPrivileges
ADVAPI32.dll::SetFileSecurityW
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteW
SHELL32.dll::SHFileOperationW
SHELL32.dll::SHGetFileInfoW
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessW
ADVAPI32.dll::OpenProcessToken
KERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.dll::LoadLibraryExW
KERNEL32.dll::GetDiskFreeSpaceW
KERNEL32.dll::GetCommandLineW
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileW
KERNEL32.dll::CreateDirectoryW
KERNEL32.dll::CreateFileW
KERNEL32.dll::DeleteFileW
KERNEL32.dll::MoveFileW
KERNEL32.dll::MoveFileExW
WIN_BASE_USER_APIRetrieves Account InformationADVAPI32.dll::LookupPrivilegeValueW
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegCreateKeyExW
ADVAPI32.dll::RegDeleteKeyW
ADVAPI32.dll::RegOpenKeyExW
ADVAPI32.dll::RegQueryValueExW
ADVAPI32.dll::RegSetValueExW
WIN_USER_APIPerforms GUI ActionsUSER32.dll::AppendMenuW
USER32.dll::EmptyClipboard
USER32.dll::FindWindowExW
USER32.dll::OpenClipboard
USER32.dll::PeekMessageW
USER32.dll::CreateWindowExW

Comments