MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8f576935bb94657e73e9b2d2aa9d1de9913f69c1a5b1251a526d5258dfe498fa. 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: 8f576935bb94657e73e9b2d2aa9d1de9913f69c1a5b1251a526d5258dfe498fa
SHA3-384 hash: c3be6b7ddf5597fb4d7a020df28250303446e331b56899e09758217412a807cad57561422161a1804f391ac9d14a0568
SHA1 hash: d0eb77c9b197301c0b2a961634cdab2e6aece270
MD5 hash: 5278be901a6f39e09195434504e935ee
humanhash: pizza-echo-crazy-juliet
File name:Jequirity.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:266'504 bytes
First seen:2023-04-19 11:42:16 UTC
Last seen:2023-04-19 13:05:59 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 7ed0d71376e55d58ab36dc7d3ffda898 (133 x GuLoader, 28 x RemcosRAT, 23 x AgentTesla)
ssdeep 6144:3kyacCTf75W3SLYkRiah9WMWaKP86a8fAaE0gYe8AW/:3kNTTMSRbh9PH6a89je8Ay
Threatray 769 similar samples on MalwareBazaar
TLSH T19C441212F6F8C117D5A91E788E33C7BE86747F5C0A28130B7760AF7E1838666CA1D259
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 e8d4d8cce8686869 (5 x GuLoader, 1 x AgentTesla, 1 x Formbook)
Reporter lowmal3
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2023-03-22T06:31:48Z
Valid to:2026-03-21T06:31:48Z
Serial number: 308409fae1e8dd38bb2439ed04c691e4a4216a3f
Thumbprint Algorithm:SHA256
Thumbprint: 0c8a89953269e632464ea69cc087e24bfc35250dcd4e31c805c6eb5f0c3a4ddd
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
3
# of downloads :
244
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Jequirity.exe
Verdict:
Malicious activity
Analysis date:
2023-04-19 11:42:55 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/50d612dd-b10d-495c-b7f6-6da1744a72d2

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/383277/
Detection(s):
Porcupine.Trojan.Win32.Guloader.gen.115847.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file
Delayed reading of the file
Creating a file in the %temp% subdirectories
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
guloader overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/643fd3c7000396b4e999753e/reports/00235280-f50e-4a24-8bb5-5c29cbee69ee/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_60%
Link:
https://www.hybrid-analysis.com/sample/8f576935bb94657e73e9b2d2aa9d1de9913f69c1a5b1251a526d5258dfe498fa
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/1d453c4d-ae04-44dc-9d45-e8418c50706a
Result
Threat name:
GuLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad.rans.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1216798
Signature
Antivirus detection for URL or domain
Found potential ransomware demand text
Hides threads from debuggers
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
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 domain / URL
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
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: 849722 Sample: Jequirity.exe Startdate: 19/04/2023 Architecture: WINDOWS Score: 100 39 www.yin.world 2->39 41 www.yf979.com 2->41 43 25 other IPs or domains 2->43 51 Snort IDS alert for network traffic 2->51 53 Multi AV Scanner detection for domain / URL 2->53 55 Malicious sample detected (through community Yara rule) 2->55 57 7 other signatures 2->57 9 Jequirity.exe 29 2->9         started        signatures3 process4 file5 29 C:\Users\user\AppData\Local\...\System.dll, PE32 9->29 dropped 31 C:\Users\user\Agitpropist\...\prldap60.dll, PE32 9->31 dropped 33 C:\Users\user\...\AsEncryptHelper.dll, PE32+ 9->33 dropped 61 Tries to detect Any.run 9->61 63 Hides threads from debuggers 9->63 13 msiexec.exe 13 9->13         started        16 Jequirity.exe 6 9->16         started        19 dllhost.exe 9->19         started        signatures6 process7 dnsIp8 65 Tries to steal Mail credentials (via file / registry access) 13->65 67 Tries to harvest and steal browser information (history, passwords, etc) 13->67 69 Writes to foreign memory regions 13->69 79 3 other signatures 13->79 21 explorer.exe 5 1 13->21 injected 25 firefox.exe 13->25         started        35 drive.google.com 142.250.186.142, 443, 49808 GOOGLEUS United States 16->35 37 googlehosted.l.googleusercontent.com 172.217.16.129, 443, 49809 GOOGLEUS United States 16->37 71 Tries to detect Any.run 16->71 73 Maps a DLL or memory area into another process 16->73 75 Sample uses process hollowing technique 16->75 77 Hides threads from debuggers 16->77 signatures9 process10 dnsIp11 45 www.hzibrahimkurankursu.com 69.197.188.43, 49841, 49842, 49843 WIIUS United States 21->45 47 conexaoimoveislitoral.com 162.240.81.18, 49850, 49851, 49852 UNIFIEDLAYER-AS-1US United States 21->47 49 15 other IPs or domains 21->49 59 System process connects to network (likely due to code injection or exploit) 21->59 27 WerFault.exe 2 25->27         started        signatures12 process13
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/8f576935bb94657e73e9b2d2aa9d1de9913f69c1a5b1251a526d5258dfe498fa/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2023-04-19 09:54:03 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=r5lwsnn3srsx447jwljkvhi55git62obuwyskgssnvjfrx7etd5a._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
175afe9e12a511bbd4b611c0c8d57c2279ba00357870187d7bdf8cb20fcbaf82
GuLoader
2ce8762499528e352fb5d3570a748aa408f72131430ac459affbcd4b40b2e99c
GuLoader
4422661ccc0d1ca90ea0427fbe9eacc398d819ef1f557c163a686fa127444c3a
GuLoader
459ce6294883e7069e69f00661550399519e9710fa272e68b92fc23505269751
GuLoader
5dc52da7b97835654bab2a3a39e93d412a50608bfd7dfccb87ff716c9aba6a37
GuLoader
78293551b34e91e229f40f1f79d41f3864f490f5871040e353fb1faade238544
GuLoader
99ec8b8e93e7a91dab1a16b9353333fa340d52569de4b88f5703bbc5a666211c
GuLoader
a865fc0e3e991a049cd158bf25d5ece089037075bacc38130a6dc8c165e5f803
GuLoader
caf7ce820152ced9c7e32dcb331899c2dd5ab092c7207f5994a4ef866d247197
GuLoader
f0ce6536bd8f80c0ee0ff1a246fd8447514906a38d4d24ec0d373c814180f9fb
GuLoader
+ 759 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader
Link:
https://tria.ge/reports/230419-nvkhmsca7v/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
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
Checks QEMU agent file
Checks computer location settings
Loads dropped DLL
Guloader,Cloudeye
Unpacked files
SH256 hash:
1188fbf20b7df9e51ec6cba5f1dbff81955a5d0c0b669d9435121c65114e5e01
MD5 hash:
c78acbfe4dfb94888d5620c507a283f6
SHA1 hash:
118e6a02ba6d3670e51d5f9982c159bb6504cd43
Link:
https://www.unpac.me/results/ab3cbdf4-ed77-4c70-85d9-ece290d8bf02/
SH256 hash:
7fe77ca13121a113c59630a3dba0c8aaa6372e8082393274da8f8608c4ce4528
MD5 hash:
fc90dfb694d0e17b013d6f818bce41b0
SHA1 hash:
3243969886d640af3bfa442728b9f0dff9d5f5b0
Link:
https://www.unpac.me/results/ab3cbdf4-ed77-4c70-85d9-ece290d8bf02/
SH256 hash:
8f576935bb94657e73e9b2d2aa9d1de9913f69c1a5b1251a526d5258dfe498fa
MD5 hash:
5278be901a6f39e09195434504e935ee
SHA1 hash:
d0eb77c9b197301c0b2a961634cdab2e6aece270
Link:
https://www.unpac.me/results/ab3cbdf4-ed77-4c70-85d9-ece290d8bf02/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/8f576935bb94/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/8f576935bb94657e73e9b2d2aa9d1de9913f69c1a5b1251a526d5258dfe498fa

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 8f576935bb94657e73e9b2d2aa9d1de9913f69c1a5b1251a526d5258dfe498fa

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/383277/

Comments