MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fb01157b437b00f34999faa320bb55c8e44bdbb415e9a15503035bfe0e1d40d6. 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: 9


Intelligence 9 IOCs 1 YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fb01157b437b00f34999faa320bb55c8e44bdbb415e9a15503035bfe0e1d40d6
SHA3-384 hash: d6a36d7008375454d72f1500af647ebab517a6dd045a439ff0b88b27b17293490c87fc75beff3a11ea6e13de9dd5b2bb
SHA1 hash: 1ac9f0876ec8f4b95fb0bbae48c2a5b5d02ed411
MD5 hash: f72a7fd231e50f9b43c3dab470364846
humanhash: hotel-mobile-six-cardinal
File name:F72A7FD231E50F9B43C3DAB470364846.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:702'907 bytes
First seen:2021-04-08 15:20:04 UTC
Last seen:2021-04-08 15:56:23 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash ced282d9b261d1462772017fe2f6972b (127 x Formbook, 113 x GuLoader, 70 x RemcosRAT)
ssdeep 6144:69X0GFb/PdSrw+uHwUa5EIZUNf5F6p363E+r+voPIQLAoxQHHmAOZPBwf9:M0o1+Bvgs36pcoPIWPxUH1F
Threatray 2'171 similar samples on MalwareBazaar
TLSH D9E4E0A32E1098EFE68984FB3A795B68DAEE7C1151C5D9873F0C7FDC25712B7A105802
Reporter abuse_ch
Tags:exe NanoCore RAT


Avatar
abuse_ch
NanoCore C2:
40.71.91.165:8092

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
40.71.91.165:8092 https://threatfox.abuse.ch/ioc/7194/

Intelligence

File Origin
# of uploads :
2
# of downloads :
204
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
F72A7FD231E50F9B43C3DAB470364846.exe
Verdict:
Malicious activity
Analysis date:
2021-04-08 15:26:57 UTC
Tags:
trojan nanocore rat
Link:
https://app.any.run/tasks/d47c354e-2b8d-4cb3-a622-55d3611cb00d

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/133235/
Detection(s):
SecuriteInfo.com.Mal.Generic-S.14729.28058.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a file
Sending a UDP request
Unauthorized injection to a recently created process
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file in the Program Files subdirectories
Launching a process
Deleting a recently created file
DNS request
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun by creating a file
Result
Threat name:
Nanocore
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/670409
Signature
.NET source code contains potential unpacker
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Contains functionality to prevent local Windows debugging
Detected Nanocore Rat
Detected unpacking (changes PE section rights)
Detected unpacking (creates a PE file in dynamic memory)
Detected unpacking (overwrites its own PE header)
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Machine Learning detection for dropped file
Machine Learning detection for sample
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
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 signatures2 2 Behavior Graph ID: 384149 Sample: bGf2H3tXGg.exe Startdate: 08/04/2021 Architecture: WINDOWS Score: 100 59 Found malware configuration 2->59 61 Malicious sample detected (through community Yara rule) 2->61 63 Antivirus detection for dropped file 2->63 65 14 other signatures 2->65 8 bGf2H3tXGg.exe 18 2->8         started        12 dhcpmon.exe 16 2->12         started        14 bGf2H3tXGg.exe 16 2->14         started        16 dhcpmon.exe 16 2->16         started        process3 file4 49 C:\Users\user\AppData\Local\...\xktfu.dll, PE32 8->49 dropped 69 Detected unpacking (changes PE section rights) 8->69 71 Detected unpacking (overwrites its own PE header) 8->71 73 Uses schtasks.exe or at.exe to add and modify task schedules 8->73 75 Contains functionality to prevent local Windows debugging 8->75 18 bGf2H3tXGg.exe 1 16 8->18         started        51 C:\Users\user\AppData\Local\...\xktfu.dll, PE32 12->51 dropped 77 Maps a DLL or memory area into another process 12->77 23 dhcpmon.exe 3 12->23         started        53 C:\Users\user\AppData\Local\...\xktfu.dll, PE32 14->53 dropped 25 bGf2H3tXGg.exe 3 14->25         started        55 C:\Users\user\AppData\Local\...\xktfu.dll, PE32 16->55 dropped 27 dhcpmon.exe 2 16->27         started        signatures5 process6 dnsIp7 57 backu4734.duckdns.org 40.71.91.165, 49708, 49710, 49711 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 18->57 37 C:\Program Files (x86)\...\dhcpmon.exe, PE32 18->37 dropped 39 C:\Users\user\AppData\Roaming\...\run.dat, ISO-8859 18->39 dropped 41 C:\Users\user\AppData\Local\...\tmpDE28.tmp, XML 18->41 dropped 43 C:\...\dhcpmon.exe:Zone.Identifier, ASCII 18->43 dropped 67 Hides that the sample has been downloaded from the Internet (zone.identifier) 18->67 29 schtasks.exe 1 18->29         started        31 schtasks.exe 1 18->31         started        45 C:\Users\user\AppData\...\dhcpmon.exe.log, ASCII 23->45 dropped 47 C:\Users\user\AppData\...\bGf2H3tXGg.exe.log, ASCII 25->47 dropped file8 signatures9 process10 process11 33 conhost.exe 29->33         started        35 conhost.exe 31->35         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fb01157b437b00f34999faa320bb55c8e44bdbb415e9a15503035bfe0e1d40d6/
Threat name:
Win32.Trojan.Zenpak
Create hunting rule
Status:
Malicious
First seen:
2021-04-02 11:23:40 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
20 of 29 (68.97%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7mark62dpmapgsmz7krsbo2vzdsexw5ucxu2cvidann74dq5idla._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
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NanoCore
+ 2'161 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/210408-2vtsy6d4fn/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
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
Loads dropped DLL
NanoCore
Malware Config
C2 Extraction:
backu4734.duckdns.org:8092
Unpacked files
SH256 hash:
9c94096638fbad8f4f41e33012437c149ecd4ab055e56fddacbd35cbcb2adcb6
MD5 hash:
55ed3b347f615fae9fb0d62efa642861
SHA1 hash:
2978295cfe6cb8ed8c7d7bcebf0cb13dcd6c9256
Link:
https://www.unpac.me/results/f02015cb-5e8b-4245-b6cb-a641187fea81/
SH256 hash:
fb01157b437b00f34999faa320bb55c8e44bdbb415e9a15503035bfe0e1d40d6
MD5 hash:
f72a7fd231e50f9b43c3dab470364846
SHA1 hash:
1ac9f0876ec8f4b95fb0bbae48c2a5b5d02ed411
Link:
https://www.unpac.me/results/f02015cb-5e8b-4245-b6cb-a641187fea81/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Vcrypt
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/fb01157b437b00f34999faa320bb55c8e44bdbb415e9a15503035bfe0e1d40d6

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.

Cape
Cape
https://www.capesandbox.com/analysis/133235/

Comments