MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 991ab8c38fea82c09c29d8ba23996b3626d0a6d6dad0493e95081cee5eab039e. 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: 991ab8c38fea82c09c29d8ba23996b3626d0a6d6dad0493e95081cee5eab039e
SHA3-384 hash: 48789615fd04b806aba27454d5bee73de932f82cf969f576b0eab49139db413b4d8333a259f3f411fc637e2074d7ca0e
SHA1 hash: 82a6d7951dde88ec69e22c2d3f5724526bb63c7d
MD5 hash: d6dfdb792e1f9bbee6a2fe377006794e
humanhash: three-december-xray-april
File name:991ab8c38fea82c09c29d8ba23996b3626d0a6d6dad0493e95081cee5eab039e
Download: download sample
Signature GuLoader
Create hunting rule
File size:317'640 bytes
First seen:2023-06-08 12:33:17 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash e2a592076b17ef8bfb48b7e03965a3fc (385 x GuLoader, 58 x RemcosRAT, 40 x AgentTesla)
ssdeep 6144:xhgqhwXoAOKpH1ZWK9+nOncdln8JdkGZfayfkBSyeshL6zhq7nHoK:EqapHB9+C2l8Doy8IxshL6zhq7Z
Threatray 237 similar samples on MalwareBazaar
TLSH T1CB6412265761C0D3E4628F313A3D9A778FB1963205158A473764678CBE32720EE2F76A
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) (4505/5/1)
File icon (PE):PE icon
dhash icon e1e8e4ecccdcf470 (2 x GuLoader)
Reporter adrian__luca
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2022-12-05T11:55:24Z
Valid to:2025-12-04T11:55:24Z
Serial number: 41f99c94174539e9f0a8d08bbd0d509e49154608
Thumbprint Algorithm:SHA256
Thumbprint: 0dbeb306e1115591bb7047c1871c52fbcae38da1ae079b26b2bd60a53f401612
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
266
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
991ab8c38fea82c09c29d8ba23996b3626d0a6d6dad0493e95081cee5eab039e
Verdict:
Suspicious activity
Analysis date:
2023-06-08 12:33:02 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/9c01f4b9-3fde-46c5-9e72-2887e318a5fd

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/396967/
Detection(s):
SecuriteInfo.com.Trojan.Generic.33838190.10365.13882.UNOFFICIAL
Create hunting rule

Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% subdirectories
Searching for the window
Сreating synchronization primitives
Creating a process from a recently created file
Creating a process with a hidden window
Launching a process
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/89960/overview
Behaviour
MalwareBazaar
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
lolbin overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/6481cabbd1582b62418b1130/reports/87711bff-016c-40c3-a7a7-9c3bc6a6951a/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/991ab8c38fea82c09c29d8ba23996b3626d0a6d6dad0493e95081cee5eab039e
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/4940fbb9-feda-4d15-a846-56d810d198f0
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
92 / 100
Link:
https://www.joesandbox.com/analysis/1251193
Signature
Antivirus detection for URL or domain
Multi AV Scanner detection for submitted file
Obfuscated command line found
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:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 884212 Sample: v64CZKJsF6.exe Startdate: 08/06/2023 Architecture: WINDOWS Score: 92 31 peachyflex.com 2->31 39 Antivirus detection for URL or domain 2->39 41 Multi AV Scanner detection for submitted file 2->41 43 Yara detected GuLoader 2->43 45 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 2->45 9 v64CZKJsF6.exe 2 23 2->9         started        signatures3 process4 file5 29 C:\Users\user\AppData\...\Urovarselet.Dig, ASCII 9->29 dropped 49 Obfuscated command line found 9->49 13 powershell.exe 16 9->13         started        signatures6 process7 signatures8 51 Very long command line found 13->51 16 powershell.exe 13 13->16         started        19 conhost.exe 13->19         started        process9 signatures10 35 Writes to foreign memory regions 16->35 37 Tries to detect Any.run 16->37 21 CasPol.exe 13 16->21         started        25 CasPol.exe 16->25         started        27 CasPol.exe 16->27         started        process11 dnsIp12 33 peachyflex.com 162.254.39.16, 443, 49862, 49864 COGECO-PEER1CA United States 21->33 47 Tries to detect Any.run 21->47 signatures13
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/991ab8c38fea82c09c29d8ba23996b3626d0a6d6dad0493e95081cee5eab039e/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2023-05-29 09:38:01 UTC
File Type:
PE (Exe)
Extracted files:
3
AV detection:
20 of 37 (54.05%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=tenlrq4p5kbmbhbj3c5chgllgytnbjww3liespuvbaoo4xvlaopa._file
Verdict:
malicious
Similar samples:
0c3bffacf3e541cfdd0b5552e048c57d313252709926031f1d4672717f9beae3
GuLoader
144750d91bdca21697d15f3dd12845497d62715c6c7251b033d039802795cbda
GuLoader
3d2cafad4e92900816d2b0de96f6314c0642ff3558a0f99c8ada7d542b273527
GuLoader
3e742163144a721a8d6733f9653c2acca1638eced30159467a6768aff047f25c
GuLoader
4007bbfbca22c422fe6a0d46a5c8588fb30342b44b7cd306b143a2ef599c7d4d
GuLoader
595f2ae803f01eba157b6deff4687380346e15609e43cc05b541b527bb7292eb
GuLoader
7132f9426f3bbadaedd15c39968640ffc5ad207b3c8f450d642174e2942f09d7
GuLoader
8345bd43ebf5d404fe2f5763155de324bd70a9feedbc330347ab198c8de9d843
GuLoader
a9acac2bc60cd65b24257dcd59cba1f79a5d8ebe6b68cffef12968038acd2675
GuLoader
e4cc72594a2b6c9d6de1c6b7e67353c98f208a0fe495b5922105728b04ecdbe9
GuLoader
+ 227 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/230608-prrm8aga6s/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in System32 directory
Checks computer location settings
Unpacked files
SH256 hash:
991ab8c38fea82c09c29d8ba23996b3626d0a6d6dad0493e95081cee5eab039e
MD5 hash:
d6dfdb792e1f9bbee6a2fe377006794e
SHA1 hash:
82a6d7951dde88ec69e22c2d3f5724526bb63c7d
Link:
https://www.unpac.me/results/46f20373-0d05-46bc-b528-77fd1aa58d94/
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/991ab8c38fea82c09c29d8ba23996b3626d0a6d6dad0493e95081cee5eab039e

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.

Cape
Cape
https://www.capesandbox.com/analysis/396967/

Comments