MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 531c1b2648ce1a5cef45be68a46916c041bd8f82d606e88649ff4a8fb20e97af. 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


NanoCore


Vendor detections: 7


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

SHA256 hash: 531c1b2648ce1a5cef45be68a46916c041bd8f82d606e88649ff4a8fb20e97af
SHA3-384 hash: 50d4ebaca10731e15c6fba8cf1c2f886cf25bc0fb0c46eda489ec2cf25b8fe864225dbd3acd9a7eafe003f0b1b0df7b8
SHA1 hash: bc322c29a658238ba9379973a26bac0819afadd0
MD5 hash: 238e8d08a715a874fe5ea4206bd9e10f
humanhash: potato-island-freddie-winter
File name:DOC261020-26102020135443.pdf.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:748'544 bytes
First seen:2020-10-26 14:38:38 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'663 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:IYzdZc0JIM1BUpMdiM7GoI7rDY0PToTB+4IEaQCZLWte8jfLwFZm8bktDW+:HZdLSMdikFI7g0LZlJ0Djzw6la
Threatray 13 similar samples on MalwareBazaar
TLSH 1EF4014533EC4956E9FE5BB4EC3411089A31FC6BA535CB4E0AC2B0EE167AF51EC11B92
Reporter abuse_ch
Tags:exe NanoCore


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: vps.hostviable.net
Sending IP: 204.93.168.129
From: selhamd@smediasys.com
Reply-To: rw07472@mail.com
Subject: PO 9-019561 OS19-0013
Attachment: DOC261020-26102020135443.gz (contains "DOC261020-26102020135443.pdf.exe")

Intelligence

File Origin
# of uploads :
1
# of downloads :
105
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Agenttesla
Create hunting rule
Link:
https://www.capesandbox.com/analysis/79187/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %AppData% directory
Launching the default Windows debugger (dwwin.exe)
Enabling autorun by creating a file
Result
Threat name:
Nanocore
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/511977
Signature
.NET source code contains potential unpacker
Detected Nanocore Rat
Drops PE files to the startup folder
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Initial sample is a PE file and has a suspicious name
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: NanoCore
Sigma detected: Scheduled temp file as task from temp location
Sigma detected: Suspicious Double Extension
Uses an obfuscated file name to hide its real file extension (double extension)
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Nanocore RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 305152 Sample: DOC261020-26102020135443.pdf.exe Startdate: 26/10/2020 Architecture: WINDOWS Score: 100 34 69tallboy.ddns.net 2->34 42 Found malware configuration 2->42 44 Malicious sample detected (through community Yara rule) 2->44 46 Multi AV Scanner detection for dropped file 2->46 48 12 other signatures 2->48 9 DOC261020-26102020135443.pdf.exe 3 2->9         started        13 DOC261020-26102020135443.pdf.exe 2->13         started        signatures3 process4 file5 30 C:\Users\user\AppData\...\HJdyTuap.exe, PE32 9->30 dropped 32 C:\Users\user\AppData\Roaming\56yuil, PE32 9->32 dropped 50 Drops PE files to the startup folder 9->50 52 Maps a DLL or memory area into another process 9->52 54 Hides that the sample has been downloaded from the Internet (zone.identifier) 9->54 15 DOC261020-26102020135443.pdf.exe 8 9->15         started        20 WerFault.exe 13->20         started        signatures6 process7 dnsIp8 36 69tallboy.ddns.net 185.165.153.28, 1155, 49714, 49715 DAVID_CRAIGGG Netherlands 15->36 38 192.168.2.1 unknown unknown 15->38 26 C:\Users\user\AppData\Roaming\...\run.dat, Non-ISO 15->26 dropped 28 C:\Users\user\AppData\Local\...\tmp817A.tmp, XML 15->28 dropped 40 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->40 22 schtasks.exe 1 15->22         started        file9 signatures10 process11 process12 24 conhost.exe 22->24         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/531c1b2648ce1a5cef45be68a46916c041bd8f82d606e88649ff4a8fb20e97af/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-10-26 06:40:46 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=kmobwjsizynfz32fxzuki2iwyba33d4c2ydorbsj75fi7mqos6xq._file
Verdict:
unknown
Similar samples:
13af8f732fea5ea0c0c60a400deb50a66677d5e70b3988766728e12a4283348b
NanoCore
4b0210dd37e5461785bd5d0b1fab796e76ef46c4a2999781710196d391cccb55
NanoCore
570e5bb05a57a95438fe1f61a116ab1d0de2bb2b0703745adea8ff45780d4a57
NanoCore
6980aeb611a463dd259e89d31b6a85a4b4363ead441790e55869c4073f533c0f
NanoCore
73ffaa868244eb4bcee7027ce57d30e604dda4dcda00fcfcbfb43103909ea52b
NanoCore
93e446bad2646dd1b68653f37e104dc7cd086f948e9b374c5cd97a158d93bca0
NanoCore
9e2415c2fe10d7f399ac6d36ac217975316345924c3ea9a2a16a7527724e282f
NanoCore
d3e028f9373813729e7f0baf6ff01f7a1aa925eea965a4499ec1575b3d21456f
NanoCore
d653e29f3a156ca3c33e2da9ea9446a696f0d795cae08203465261e0451309d8
NanoCore
ef9b7e4604bd2c6755e2d7de3c65e5b04169c8e46e568058a29b94a4c6a7feee
NanoCore
+ 3 additional samples on MalwareBazaar
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
evasion trojan keylogger stealer spyware family:nanocore
Link:
https://tria.ge/reports/201026-kmnambydza/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Checks whether UAC is enabled
Drops startup file
NanoCore
Malware Config
C2 Extraction:
69tallboy.ddns.net:1155
Please note that we are no longer able to provide a coverage score for Virus Total.

File information

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

Malspam

NanoCore

gz 888025aa143b72514af6f2a3371181c92640da62bd3d0298e80111e4e993ce76

NanoCore

Executable exe 531c1b2648ce1a5cef45be68a46916c041bd8f82d606e88649ff4a8fb20e97af

(this sample)

  
Dropped by
MD5 0d5c64caba1b0a3ee8b1d9886b33c8a6
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 888025aa143b72514af6f2a3371181c92640da62bd3d0298e80111e4e993ce76
Cape
Cape
https://www.capesandbox.com/analysis/79187/

Comments