MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4598c0da57964d4b655a32ef1fa3c77333aa4bb6ae64c884139e6d23ca20aaff. 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


Ousaban


Vendor detections: 7


Intelligence 7 IOCs YARA 16 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4598c0da57964d4b655a32ef1fa3c77333aa4bb6ae64c884139e6d23ca20aaff
SHA3-384 hash: d5fe9bba6ab209548876b1a868fc6bea2d6e3416c1ae436fb85572b7bc46fa5707168388a34e609bb36e35c16f648197
SHA1 hash: 201e048e9e6e16de10d17db6a50877d4555fe47f
MD5 hash: fa80f72fc8e2be3eb320f259e2ace5d1
humanhash: ack-vegan-twelve-london
File name:Nf - Eletronica LTDA.msi
Download: download sample
Signature Ousaban
Create hunting rule
File size:23'262'720 bytes
First seen:2024-02-05 14:06:50 UTC
Last seen:Never
File type:Microsoft Software Installer (MSI) msi
MIME type:application/x-msi
ssdeep 393216:EtVGthUltn0e+57DRVKeWM/Mzckk4XNaJPQlbSqDO5hOhwk/ytS:EYhUJc/RV5WM/Mzc4XNaJPQlbPO/OhQt
TLSH T1E7373322A2C7C221D56D0277F9ACFD0E0574FE77472041E773B87CAA59F58C1A2B8A52
TrID 80.0% (.MSI) Microsoft Windows Installer (454500/1/170)
10.7% (.MST) Windows SDK Setup Transform script (61000/1/5)
7.8% (.MSP) Windows Installer Patch (44509/10/5)
1.4% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter johnk3r
Tags:Loader msi ousaban


Avatar
johnk3r
https://stefanostore.com.br/ne.php?file=nota.zip

Intelligence

File Origin
# of uploads :
1
# of downloads :
114
Origin country :
BR BR
Vendor Threat Intelligence
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
lolbin remote shell32
Link:
https://www.filescan.io/uploads/65c0eb8a7251d2ad7dc85c8a/reports/074d5e48-d1db-4395-b93a-b3c3cc19e40b/overview
Verdict:
Suspicious
Link:
https://www.hybrid-analysis.com/sample/4598c0da57964d4b655a32ef1fa3c77333aa4bb6ae64c884139e6d23ca20aaff
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/4598c0da57964d4b655a32ef1fa3c77333aa4bb6ae64c884139e6d23ca20aaff
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
88 / 100
Link:
https://www.joesandbox.com/analysis/1386808
Signature
Antivirus detection for URL or domain
Detected unpacking (overwrites its own PE header)
Hides threads from debuggers
Machine Learning detection for dropped file
Multi AV Scanner detection for submitted file
Overwrites code with unconditional jumps - possibly settings hooks in foreign process
PE file contains section with special chars
Query firmware table information (likely to detect VMs)
Tries to evade analysis by execution special instruction (VM detection)
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
MSI
Link:
https://malprob.io/report/4598c0da57964d4b655a32ef1fa3c77333aa4bb6ae64c884139e6d23ca20aaff
Gathering data
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=iwmmbwsxszguwzk2glxr7i6homz2us5wvzsmrbattzwshsravl7q._file
Verdict:
unknown
Result
Malware family:
n/a
Score:
  6/10
Tags:
n/a
Link:
https://tria.ge/reports/240205-rezt6shdh8/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Windows directory
Executes dropped EXE
Loads dropped DLL
Suspicious use of NtSetInformationThreadHideFromDebugger
Enumerates connected drives
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/4598c0da57964d4b655a32ef1fa3c77333aa4bb6ae64c884139e6d23ca20aaff

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:BLOWFISH_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for Blowfish constants
Rule name:Borland
Create hunting rule
Author:malware-lu
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Detect_LATAM_MSI_Banker
Create hunting rule
Rule name:maldoc_find_kernel32_base_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:maldoc_OLE_file_magic_number
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:suspicious_msi_file
Create hunting rule
Author:Johnk3r
Description:Detects common strings, DLL and API in Banker_BR
Rule name:with_urls
Create hunting rule
Author:Antonio Sanchez <asanchez@hispasec.com>
Description:Rule to detect the presence of an or several urls
Reference:http://laboratorio.blogs.hispasec.com/
Rule name:yara_template
Create hunting rule

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malpedia
Malpedia
https://malpedia.caad.fkie.fraunhofer.de/details/win.ousaban
  
Delivery method
Distributed via e-mail link

Comments