MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fb00dbb74f4759e719141608075ff88ad0241f6fbf19cbf23daa133098455a13. 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: 8


Intelligence 8 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fb00dbb74f4759e719141608075ff88ad0241f6fbf19cbf23daa133098455a13
SHA3-384 hash: 05ca3c77c623b5d313ca827d9854b477de3db81c4f9aac5b84862786a30b61f08f892e89925b703b5ee66a537443144f
SHA1 hash: 67034e985c7e431bc410316e21c578889c6ad46a
MD5 hash: 3427449c390da21928ca6cfb1f2f014d
humanhash: carolina-echo-bulldog-cardinal
File name:3427449c390da21928ca6cfb1f2f014d.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:29'672 bytes
First seen:2020-12-03 14:24:43 UTC
Last seen:2020-12-03 16:07:03 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 384:3hoYh/xNExgqvKk4PC1ZLSkkqQ8vtnAPkakkbHg25U2wcqDgf2hr2:juXvKTC+tbA2S2FqUf2hr2
Threatray 1'372 similar samples on MalwareBazaar
TLSH 14D2080437C20816F3FAEB764BC3C99513FAE2A25E72916FD7C9A2B21D436841E14396
Reporter abuse_ch
Tags:exe NanoCore RAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
186
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/106609/
Detection(s):
SecuriteInfo.com.Trojan.Siggen11.54256.29881.14970.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Running batch commands
Creating a process with a hidden window
Launching a process
DNS request
Sending a custom TCP request
Unauthorized injection to a recently created process
Creating a file
Creating a window
Creating a file in the %AppData% subdirectories
Using the Windows Management Instrumentation requests
Sending a TCP request to an infection source
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun by creating a file
Adding exclusions to Windows Defender
Enabling autorun
Result
Verdict:
UNKNOWN
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.adwa.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/554786
Signature
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
Connects to a pastebin service (likely for C&C)
Creates an undocumented autostart registry key
Creates autostart registry keys with suspicious names
Creates multiple autostart registry keys
Detected Nanocore Rat
Drops PE files to the startup folder
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
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: Powershell adding suspicious path to exclusion list
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Uses dynamic DNS services
Yara detected Nanocore RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 326493 Sample: oBa9Sk4zyj.exe Startdate: 03/12/2020 Architecture: WINDOWS Score: 100 64 pastebin.com 2->64 66 g.msn.com 2->66 76 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->76 78 Malicious sample detected (through community Yara rule) 2->78 80 Multi AV Scanner detection for dropped file 2->80 82 9 other signatures 2->82 8 oBa9Sk4zyj.exe 24 7 2->8         started        13 oBa9Sk4zyj.exe 2->13         started        15 oBa9Sk4zyj.exe 2->15         started        17 3 other processes 2->17 signatures3 process4 dnsIp5 70 pastebin.com 104.23.98.190, 443, 49718 CLOUDFLARENETUS United States 8->70 72 hastebin.com 104.24.127.89, 443, 49714, 49723 CLOUDFLARENETUS United States 8->72 58 C:\Users\user\AppData\...\oBa9Sk4zyj.exe, PE32 8->58 dropped 60 C:\Users\...\oBa9Sk4zyj.exe:Zone.Identifier, ASCII 8->60 dropped 62 C:\Users\user\AppData\...\oBa9Sk4zyj.exe.log, ASCII 8->62 dropped 86 Creates an undocumented autostart registry key 8->86 88 Creates autostart registry keys with suspicious names 8->88 90 Creates multiple autostart registry keys 8->90 92 3 other signatures 8->92 19 oBa9Sk4zyj.exe 8->19         started        24 cmd.exe 1 8->24         started        26 powershell.exe 22 8->26         started        36 3 other processes 8->36 28 cmd.exe 13->28         started        74 192.168.2.1 unknown unknown 15->74 30 cmd.exe 15->30         started        32 cmd.exe 17->32         started        34 cmd.exe 17->34         started        file6 signatures7 process8 dnsIp9 68 delightson.ddns.net 194.5.98.86, 49727, 5050 DANILENKODE Netherlands 19->68 56 C:\Users\user\AppData\Roaming\...\run.dat, Non-ISO 19->56 dropped 84 Hides that the sample has been downloaded from the Internet (zone.identifier) 19->84 38 conhost.exe 24->38         started        40 timeout.exe 1 24->40         started        42 conhost.exe 26->42         started        46 2 other processes 28->46 48 2 other processes 30->48 50 2 other processes 32->50 52 2 other processes 34->52 44 conhost.exe 36->44         started        54 2 other processes 36->54 file10 signatures11 process12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fb00dbb74f4759e719141608075ff88ad0241f6fbf19cbf23daa133098455a13/
Threat name:
ByteCode-MSIL.Backdoor.NanoCore
Create hunting rule
Status:
Malicious
First seen:
2020-12-03 06:31:20 UTC
AV detection:
22 of 28 (78.57%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=7manxn2pi5m6ogiucyeaox7yrlicih3px4m4x4r5vijtbgcflijq._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
Similar samples:
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NanoCore
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644a0403a3c8254a3846b8c07aa7fdeb2cfe21aa5630ca3100949869f60ae407
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adb1948d6b4d965ee35ea8107b1128a9075d3548b61a72cfb35d0893d1f4ffaf
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bbcd874940bbc39ba5a0dd87dd1dbb7c1301bd0a2485293bcb2b2f2ad3280948
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db591a08743176655e567ddffcbbd79b9e2e31feadc1feb54a0200296a93d53d
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e26e07749118e8284c28e50553c62bdbe327234b801ffdf2eedb8663444aa459
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f4bf592fde78af7ed0b06166ac8265d7b65a2457b9a61f12c2e3a4fad641ac19
NanoCore
+ 1'362 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/201203-ql72yr9xbx/
Behaviour
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Adds Run key to start application
Checks whether UAC is enabled
Legitimate hosting services abused for malware hosting/C2
Drops startup file
Windows security modification
Modifies WinLogon for persistence
Modifies Windows Defender Real-time Protection settings
NanoCore
Windows security bypass
Turns off Windows Defender SpyNet reporting
Malware Config
C2 Extraction:
delightson.ddns.net:5050
Unpacked files
SH256 hash:
fb00dbb74f4759e719141608075ff88ad0241f6fbf19cbf23daa133098455a13
MD5 hash:
3427449c390da21928ca6cfb1f2f014d
SHA1 hash:
67034e985c7e431bc410316e21c578889c6ad46a
Link:
https://www.unpac.me/results/4f179148-3814-405a-b367-499f10532dee/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Trojan
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/fb00dbb74f4759e719141608075ff88ad0241f6fbf19cbf23daa133098455a13

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 fb00dbb74f4759e719141608075ff88ad0241f6fbf19cbf23daa133098455a13

(this sample)

Cape
Cape
https://www.capesandbox.com/analysis/106609/
  
URLhaus
https://urlhaus.abuse.ch/url/885124/
  
Delivery method
Distributed via web download

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