MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a98a739b9ab7b06bf2833f6ef4aa97db1b7c2441365c7104e878c8b29bf90f74. 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: 12


Intelligence 12 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a98a739b9ab7b06bf2833f6ef4aa97db1b7c2441365c7104e878c8b29bf90f74
SHA3-384 hash: b92244b847d3e6b9089572b4db1daedf71c29adb35ffd740ea9b28587678f4d13158943202b8590054e3dea9cfa03764
SHA1 hash: bcabae5c0b3ca8e9558ad3f57c3a10e8b5ae6f74
MD5 hash: 8c596990203f7d15651498fdba84b5f3
humanhash: eleven-delta-butter-whiskey
File name:8c596990203f7d15651498fdba84b5f3.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:766'976 bytes
First seen:2021-02-24 17:23:56 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:sEoF4lSePJI+f8Y+6I7MoPrYeAZDGfQ0lSzujpMEOoeYw3LLUEMthvoPTG16KL:GYPJnf876I7KTZDYizutM3oeLCsG16KL
Threatray 1'579 similar samples on MalwareBazaar
TLSH 54F412602A365F22D87407F063B01A9617FD1A3F4B96E70C4C8AE2DA7263F95691FD43
Reporter abuse_ch
Tags:exe NanoCore RAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
159
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
DHL88700456XXXX_CONFIRMATION_BOOKING_REFERENCE_BJC400618092909yy.doc
Verdict:
Malicious activity
Analysis date:
2021-02-24 11:50:26 UTC
Tags:
ole-embedded exploit CVE-2017-11882 rat nanocore
Link:
https://app.any.run/tasks/c176231c-dbe4-4a0a-b21c-5e15fcca6681

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
NanoCore
Create hunting rule
Link:
https://www.capesandbox.com/analysis/119044/
Detection(s):
SecuriteInfo.com.Win32.8716.25568.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Sending a UDP request
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
Unauthorized injection to a recently created process
Creating a file
Creating a file in the %AppData% subdirectories
Creating a file in the Program Files subdirectories
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Connection attempt to an infection source
Enabling autorun by creating a file
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.
Result
Threat name:
Nanocore
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/617128
Signature
.NET source code contains potential unpacker
C2 URLs / IPs found in malware configuration
Detected Nanocore Rat
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
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
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Nanocore RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 357566 Sample: m72OvSF7e5.exe Startdate: 24/02/2021 Architecture: WINDOWS Score: 100 63 Found malware configuration 2->63 65 Malicious sample detected (through community Yara rule) 2->65 67 Multi AV Scanner detection for dropped file 2->67 69 10 other signatures 2->69 8 m72OvSF7e5.exe 6 2->8         started        12 dhcpmon.exe 4 2->12         started        14 m72OvSF7e5.exe 4 2->14         started        16 dhcpmon.exe 3 2->16         started        process3 file4 55 C:\Users\user\AppData\...\xWdTBYiTWyTud.exe, PE32 8->55 dropped 57 C:\Users\user\AppData\Local\...\tmp79E0.tmp, XML 8->57 dropped 59 C:\Users\user\AppData\...\m72OvSF7e5.exe.log, ASCII 8->59 dropped 73 Injects a PE file into a foreign processes 8->73 18 m72OvSF7e5.exe 1 12 8->18         started        23 schtasks.exe 1 8->23         started        25 schtasks.exe 12->25         started        27 dhcpmon.exe 12->27         started        29 dhcpmon.exe 12->29         started        31 schtasks.exe 14->31         started        33 m72OvSF7e5.exe 14->33         started        signatures5 process6 dnsIp7 61 194.5.98.202, 4488, 49722, 49725 DANILENKODE Netherlands 18->61 49 C:\Program Files (x86)\...\dhcpmon.exe, PE32 18->49 dropped 51 C:\Users\user\AppData\Roaming\...\run.dat, data 18->51 dropped 53 C:\...\dhcpmon.exe:Zone.Identifier, ASCII 18->53 dropped 71 Hides that the sample has been downloaded from the Internet (zone.identifier) 18->71 35 schtasks.exe 1 18->35         started        37 schtasks.exe 1 18->37         started        39 conhost.exe 23->39         started        41 conhost.exe 25->41         started        43 conhost.exe 31->43         started        file8 signatures9 process10 process11 45 conhost.exe 35->45         started        47 conhost.exe 37->47         started       
Detection:
nanocore
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a98a739b9ab7b06bf2833f6ef4aa97db1b7c2441365c7104e878c8b29bf90f74/
Threat name:
Win32.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-02-24 13:19:26 UTC
File Type:
PE (.Net Exe)
Extracted files:
40
AV detection:
24 of 48 (50.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=vgfhhg42w6ygx4udh5xpjkux3mnxyjcbgzohcbhipdelfg7zb52a._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
Similar samples:
15f0aac31d57cff82f66f71e05e8a186752b8d93ff94c0d1e7c88d11f0c0b55a
NanoCore
258856f05819789b47e0bed58b1df479976a355cd30b953b23f9e2f5d286578a
NanoCore
2acf6c2398a12dc97ff2ceec4f348ed6338c4aafb2dcfeb24856cf8526d12a9d
NanoCore
4f0035201ba7a3a536727862b8ac8dbf389038c5af1674ff7a982190fed1e30b
NanoCore
644a0403a3c8254a3846b8c07aa7fdeb2cfe21aa5630ca3100949869f60ae407
NanoCore
6a4ecef563225ed9892ff403374d704be5e3b4242ae9f08d624325e83fd22276
NanoCore
db591a08743176655e567ddffcbbd79b9e2e31feadc1feb54a0200296a93d53d
NanoCore
e26e07749118e8284c28e50553c62bdbe327234b801ffdf2eedb8663444aa459
NanoCore
f3ac633354efc183e1705dd9e042d39b62208735f6f9e83534fb21c9f32b5d70
NanoCore
f4bf592fde78af7ed0b06166ac8265d7b65a2457b9a61f12c2e3a4fad641ac19
NanoCore
+ 1'569 additional samples on MalwareBazaar
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:nanocore evasion keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/210224-5qwrvtv7ws/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Program Files directory
Suspicious use of SetThreadContext
Adds Run key to start application
Checks whether UAC is enabled
NanoCore
Malware Config
C2 Extraction:
194.5.98.202:4488
Unpacked files
SH256 hash:
df51b81d2a6b6f17a7f75ce2551b34ba1f271453c841ed533e9f55f4946c94dd
MD5 hash:
efea78515f6b3eff44890c4b76c3e2f1
SHA1 hash:
0183a027cf1cebc4d7b659ec3436d1413fd52247
Detections:
win_nanocore_w0
Create hunting rule
Link:
https://www.unpac.me/results/cb633480-8187-421b-bca4-3e76047f0a8b/
SH256 hash:
f0a09c48af16c079c37ad0914f18897976357981fe5ee6f556ab9f9f70b9a671
MD5 hash:
f984a71581f6da5732110be2a569a392
SHA1 hash:
10de05b6b35fc5dbc00c42d59a4b850bcaae01e6
Link:
https://www.unpac.me/results/cb633480-8187-421b-bca4-3e76047f0a8b/
SH256 hash:
eb6b593e39822c609036b76193c5bcc62ce5c6267e35a36a3d5a67ccdca40161
MD5 hash:
4a3c3ad54f1851e7e165154272159f51
SHA1 hash:
9f570adb6ff1e72779d2b635c32074a46b8af1db
Link:
https://www.unpac.me/results/cb633480-8187-421b-bca4-3e76047f0a8b/
SH256 hash:
a98a739b9ab7b06bf2833f6ef4aa97db1b7c2441365c7104e878c8b29bf90f74
MD5 hash:
8c596990203f7d15651498fdba84b5f3
SHA1 hash:
bcabae5c0b3ca8e9558ad3f57c3a10e8b5ae6f74
Link:
https://www.unpac.me/results/cb633480-8187-421b-bca4-3e76047f0a8b/
Please note that we are no longer able to provide a coverage score for Virus Total.

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:ach_NanoCore
Create hunting rule
Author:abuse.ch
Rule name:Nanocore
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Nanocore in memory
Reference:internal research
Rule name:nanocore_rat
Create hunting rule
Author:jeFF0Falltrades
Rule name:Nanocore_RAT_Feb18_1
Create hunting rule
Author:Florian Roth
Description:Detects Nanocore RAT
Reference:Internal Research - T2T
Rule name:Nanocore_RAT_Gen_2
Create hunting rule
Author:Florian Roth
Description:Detetcs the Nanocore RAT
Reference:https://www.sentinelone.com/blogs/teaching-an-old-rat-new-tricks/
Rule name:win_nanocore_w0
Create hunting rule
Author: Kevin Breen <kevin@techanarchy.net>

File information

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

Web download

NanoCore

Executable exe a98a739b9ab7b06bf2833f6ef4aa97db1b7c2441365c7104e878c8b29bf90f74

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1027219/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/119044/

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