MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 7fb9c91eb54a2b4edf3f3ffd386ba95bcae68a086ea82b791a7e59d97107e3e8. 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: 10


Intelligence 10 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 7fb9c91eb54a2b4edf3f3ffd386ba95bcae68a086ea82b791a7e59d97107e3e8
SHA3-384 hash: 628c3c6fc0309d7df5dcb0019d9552fe09c4ea464a1b2fa6224dd92d077c72b15286be73e2af7f64e0afdab494c340fc
SHA1 hash: fd76d2d6bd7622dcf77a542b682c152a5f87b8c4
MD5 hash: 0b5c44d2c054d22baacdef4b71935079
humanhash: minnesota-march-edward-network
File name:scan_36.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:498'688 bytes
First seen:2020-08-12 05:51:49 UTC
Last seen:2020-08-12 07:10:59 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'599 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 12288:Y2oclr8MXxLf8MWz5/GucZUWaB6/k8+pB:V8MXxj89wuUUW1x
Threatray 1'189 similar samples on MalwareBazaar
TLSH A5B4DF4AB688CA85C02D9B34E63201F507F39C1AE725DA4B7FE37ED83A32B624751517
Reporter abuse_ch
Tags:exe NanoCore RAT


Avatar
abuse_ch
Malspam distributing NanoCore:

HELO: slot0.yougurnu.com
Sending IP: 104.168.172.35
From: info@yougurnu.com
Subject: FW: RE: R29011CA !! Please reply ASAP
Attachment: scan_36.zip (contains "scan_36.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
107
Origin country :
n/a
Vendor Threat Intelligence
Detection:
NanoCore
Create hunting rule
Link:
https://www.capesandbox.com/analysis/43904/
Detection(s):
SecuriteInfo.com.Trojan.PWS.Stealer.23680.19458.19114.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
Creating a file
Creating a file in the %AppData% subdirectories
DNS request
Using the Windows Management Instrumentation requests
Sending a TCP request to an infection source
Enabling autorun by creating a file
Unauthorized injection to a system process
Result
Threat name:
Nanocore
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/421370
Signature
.NET source code contains potential unpacker
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)
Sigma detected: NanoCore
Sigma detected: Scheduled temp file as task from temp location
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM_3
Yara detected Nanocore RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 263109 Sample: scan_36.exe Startdate: 12/08/2020 Architecture: WINDOWS Score: 100 40 dolphnindia.duckdns.org 2->40 46 Found malware configuration 2->46 48 Malicious sample detected (through community Yara rule) 2->48 50 Sigma detected: Scheduled temp file as task from temp location 2->50 52 10 other signatures 2->52 9 scan_36.exe 7 2->9         started        13 MSBuild.exe 2 2->13         started        signatures3 process4 file5 32 C:\Users\user\AppData\Roaming\ctRDFgFov.exe, PE32 9->32 dropped 34 C:\Users\...\ctRDFgFov.exe:Zone.Identifier, ASCII 9->34 dropped 36 C:\Users\user\AppData\Local\...\tmpEC41.tmp, XML 9->36 dropped 38 C:\Users\user\AppData\...\scan_36.exe.log, ASCII 9->38 dropped 54 Writes to foreign memory regions 9->54 56 Injects a PE file into a foreign processes 9->56 15 MSBuild.exe 8 9->15         started        20 schtasks.exe 1 9->20         started        22 conhost.exe 13->22         started        signatures6 process7 dnsIp8 42 dolphnindia.duckdns.org 79.134.225.75, 49738, 49746, 49751 FINK-TELECOM-SERVICESCH Switzerland 15->42 30 C:\Users\user\AppData\Roaming\...\run.dat, Non-ISO 15->30 dropped 44 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->44 24 schtasks.exe 1 15->24         started        26 conhost.exe 20->26         started        file9 signatures10 process11 process12 28 conhost.exe 24->28         started       
Detection:
nanocore
Create hunting rule
Link:
https://mwdb.cert.pl/sample/7fb9c91eb54a2b4edf3f3ffd386ba95bcae68a086ea82b791a7e59d97107e3e8/
Threat name:
ByteCode-MSIL.Infostealer.Agensla
Create hunting rule
Status:
Malicious
First seen:
2020-08-12 05:53:05 UTC
AV detection:
22 of 29 (75.86%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=p644shvvjivu5xz7h76tq25jlpfoncqin2ucw6i2pzm5s4ih4pua._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
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NanoCore
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83b70b20d0cdb13e9c420723ba5f025827d21e0c051c6e64b5553a5c372c3374
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c8c1e04edd5c422d065e27a3a73931d373de200419cd9ba649fdfadee686e5f2
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de4e7923d6209906899738f2091bd48d49e2bce9fbc5aebe7658444e8d040285
NanoCore
+ 1'179 additional samples on MalwareBazaar
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
keylogger trojan stealer spyware family:nanocore
Link:
https://tria.ge/reports/200812-nqntwraag6/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
NanoCore
Malware Config
C2 Extraction:
dolphnindia.duckdns.org:6543
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/7fb9c91eb54a2b4edf3f3ffd386ba95bcae68a086ea82b791a7e59d97107e3e8

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_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.

Malspam

NanoCore

zip 784883d68d5bf1623662ce37efdd1aa9cd3f5ccd1a6b31d7ce8b9fcf106a5bf0

NanoCore

Executable exe 7fb9c91eb54a2b4edf3f3ffd386ba95bcae68a086ea82b791a7e59d97107e3e8

(this sample)

  
Dropped by
MD5 0c5c0be2086c14dbf675b55570741176
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/43904/
  
Dropped by
SHA256 784883d68d5bf1623662ce37efdd1aa9cd3f5ccd1a6b31d7ce8b9fcf106a5bf0

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