MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4d8d20365deb38fb52d0df02cc5be37a15873f731134199de6a2286854fd6512. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4d8d20365deb38fb52d0df02cc5be37a15873f731134199de6a2286854fd6512
SHA3-384 hash: e131665a0bb4a5dc880ca526f5419669a6095f6a2450b9726127b27f0412bc93aa0e5341a63593b5ef44051ad8e297cf
SHA1 hash: a4b9f061aac9f2caf9a21d7b6b6b4493c39332f2
MD5 hash: 848ced66c05a735b64b58de6e60a7cb8
humanhash: oklahoma-fruit-magazine-ten
File name:rpayment_slip_pdf.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:722'136 bytes
First seen:2024-03-24 14:19:51 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 4f67aeda01a0484282e8c59006b0b352 (51 x GuLoader, 9 x RemcosRAT, 9 x VIPKeylogger)
ssdeep 12288:co5vFoWSR4nbLQ/mxVfon79ho/7lnoNROHnU:coj2cbz079ho/7lnoNRi
Threatray 346 similar samples on MalwareBazaar
TLSH T144E469FE6C60B599FE39C6F62A548A30E71A2C11F4103676627C72DBC9B988143D790F
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 827169697979b1b1 (5 x GuLoader, 1 x Formbook)
Reporter FXOLabs
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Startskamlen
Issuer:Startskamlen
Algorithm:sha256WithRSAEncryption
Valid from:2023-08-10T10:42:30Z
Valid to:2026-08-09T10:42:30Z
Serial number: 49681d70b23291a0cbcc0505695590276d886892
Thumbprint Algorithm:SHA256
Thumbprint: a6b26ee0eb63923aab2bdb03eece82ac40f66acf2185779c45ecf567d6c6c3de
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
340
Origin country :
BR BR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
4d8d20365deb38fb52d0df02cc5be37a15873f731134199de6a2286854fd6512.exe
Verdict:
Malicious activity
Analysis date:
2024-03-24 14:23:04 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/d821867f-310c-489f-9c0f-b79d50590c8e

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a file in the %temp% directory
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
installer lolbin masquerade overlay packed shell32
Link:
https://www.filescan.io/uploads/660036947e414bfaaec048b9/reports/dd13e5e1-1901-46e2-a116-d081fb07454f/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/4d8d20365deb38fb52d0df02cc5be37a15873f731134199de6a2286854fd6512
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/30c0eba2-7ab3-4b71-95f9-8e056f62496c
Result
Threat name:
GuLoader, Lokibot
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1414717
Signature
Antivirus detection for URL or domain
Initial sample is a PE file and has a suspicious name
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Snort IDS alert for network traffic
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
Yara detected Lokibot
Behaviour
Behavior Graph:
Download SVG
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4d8d20365deb38fb52d0df02cc5be37a15873f731134199de6a2286854fd6512
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4d8d20365deb38fb52d0df02cc5be37a15873f731134199de6a2286854fd6512/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Suspicious
First seen:
2024-03-22 07:21:45 UTC
File Type:
PE (Exe)
Extracted files:
7
AV detection:
17 of 24 (70.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jwgsans55m4pwuwq34bmyw7dpikyop3tce2bthpguiugqvh5muja._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
1aba3ebf5fc7d6221270fa7e13713216e06b678b197524a35d3a5cd9b1e0d857
GuLoader
73f87dc14d15addd846f2073187ac64be665ce79f618fff31c981ac95a51d288
GuLoader
75bb54e0d27dfeb0efa4680d7136307f9a82edef662e9fc3c4339b05b3fe7079
GuLoader
763d73647ce03b99fdc5a43badfe0f4571e86998395d30f8f68d8042b8c83ace
GuLoader
8808e4e220fcda37bdb05b703e86053f88a6ebd68037d37ef89754c459d7ad2b
GuLoader
8d75ec453d1ff873f2aad8756a39f0c3ecb9addd6ba0a05e771acc9bbe0170ed
GuLoader
92e55159b6e18fb75e5aa6d39a9b37822619c9d31123894ade0f7c4544a045cb
GuLoader
b643d5ee1be492fcbfbfb4c9b9bf3da8460b74ab2097b96e6545318c92f2ee26
GuLoader
df1b0622c227d706845a398bafc28232e1a175e9595ad3a9db9fb2483834343c
GuLoader
+ 336 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/240324-rneklafh21/
Behaviour
Enumerates physical storage devices
Drops file in Windows directory
Legitimate hosting services abused for malware hosting/C2
Loads dropped DLL
Unpacked files
SH256 hash:
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e
MD5 hash:
3f176d1ee13b0d7d6bd92e1c7a0b9bae
SHA1 hash:
fe582246792774c2c9dd15639ffa0aca90d6fd0b
Link:
https://www.unpac.me/results/803185bd-1f2b-479c-bb19-ddac5b44721c/
SH256 hash:
4d8d20365deb38fb52d0df02cc5be37a15873f731134199de6a2286854fd6512
MD5 hash:
848ced66c05a735b64b58de6e60a7cb8
SHA1 hash:
a4b9f061aac9f2caf9a21d7b6b6b4493c39332f2
Link:
https://www.unpac.me/results/803185bd-1f2b-479c-bb19-ddac5b44721c/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4d8d20365deb/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/4d8d20365deb38fb52d0df02cc5be37a15873f731134199de6a2286854fd6512

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: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 4d8d20365deb38fb52d0df02cc5be37a15873f731134199de6a2286854fd6512

(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
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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