MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3cb221973d52d12fc900f37496a9c5f77b30da63886a0f7d54111982c00e872b. 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: 11


Intelligence 11 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 3cb221973d52d12fc900f37496a9c5f77b30da63886a0f7d54111982c00e872b
SHA3-384 hash: aa189730f426b0d0c8256205cd4e1cfb142bc1822f7b4b754c68f6c60d228232b2065ef2238ff98c38b94d0ea95ac895
SHA1 hash: 127047c52e010a9d5dae43bc2530d43b6db579ce
MD5 hash: c8b0e1ef53206e9a1f8845d379ae6d34
humanhash: oven-fifteen-illinois-romeo
File name:862020,pdf.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:682'496 bytes
First seen:2020-08-06 05:51:40 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'650 x AgentTesla, 19'462 x Formbook, 12'203 x SnakeKeylogger)
ssdeep 12288:pT/T/0u62oZk9vFJYvZXo8j5REbqh8hIguOHvZ2p:R8rVS9PYvZXJjOqkJHvo
Threatray 1'519 similar samples on MalwareBazaar
TLSH 16E4086021311587D7EF64F0AF0CF64415E35AAE1B9AF385EAB37C89F183271271E94A
Reporter abuse_ch
Tags:exe NanoCore RAT


Avatar
abuse_ch
Malspam distributing NanoCore:

HELO: web72.smartstrategies.gr
Sending IP: 88.99.208.204
From: surendra <surendra@fivestarship.com>
Subject: REMITTANCE USD 7588.50
Attachment: 862020,pdf.zip (contains "862020,pdf.exe")

Intelligence

File Origin
# of uploads :
1
# of downloads :
86
Origin country :
n/a
Vendor Threat Intelligence
Detection:
NanoCore
Create hunting rule
Link:
https://www.capesandbox.com/analysis/40084/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.VFR-1.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Result
Threat name:
Nanocore
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/412160
Signature
.NET source code contains potential unpacker
Detected Nanocore Rat
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
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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 signatures2 2 Behavior Graph ID: 258330 Sample: 862020,pdf.exe Startdate: 06/08/2020 Architecture: WINDOWS Score: 100 45 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->45 47 Malicious sample detected (through community Yara rule) 2->47 49 Sigma detected: Scheduled temp file as task from temp location 2->49 51 10 other signatures 2->51 8 862020,pdf.exe 7 2->8         started        12 MSBuild.exe 2 2->12         started        process3 file4 29 C:\Users\user\AppData\...\lCwqeTSzvEZ.exe, PE32 8->29 dropped 31 C:\Users\...\lCwqeTSzvEZ.exe:Zone.Identifier, ASCII 8->31 dropped 33 C:\Users\user\AppData\Local\...\tmp4195.tmp, XML 8->33 dropped 35 C:\Users\user\AppData\...\862020,pdf.exe.log, ASCII 8->35 dropped 53 Writes to foreign memory regions 8->53 55 Injects a PE file into a foreign processes 8->55 14 MSBuild.exe 11 8->14         started        19 schtasks.exe 1 8->19         started        37 C:\Users\user\AppData\...\MSBuild.exe.log, ASCII 12->37 dropped 21 conhost.exe 12->21         started        signatures5 process6 dnsIp7 41 billionaire.ddns.net 79.134.225.122, 3734, 49740 FINK-TELECOM-SERVICESCH Switzerland 14->41 39 C:\Users\user\AppData\Roaming\...\run.dat, data 14->39 dropped 43 Hides that the sample has been downloaded from the Internet (zone.identifier) 14->43 23 schtasks.exe 1 14->23         started        25 conhost.exe 19->25         started        file8 signatures9 process10 process11 27 conhost.exe 23->27         started       
Detection:
nanocore
Create hunting rule
Link:
https://mwdb.cert.pl/sample/3cb221973d52d12fc900f37496a9c5f77b30da63886a0f7d54111982c00e872b/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-08-06 05:53:05 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=hszcdfz5klis7sia6n2jnkof655tbwtdrbva67kucemyfqaoq4vq._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
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1a128360798520eca9e82a0f2b97de12068788c89686adad3b44d68f9fc671e6
NanoCore
23486053a77b3b37f7323a6bd6941ec13d341fc553bcb0675b475cef4392c894
NanoCore
327bc1ad9fc793811e5da6cb3553b7dca05c8a48d8060fc94015339ee805851d
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54c937e5b6fe28e7076e549802765e15ad6191d2ddc427b532ff9347fef2eb39
NanoCore
99938664e2162f06313d017b275c7da25b45d578177911808a986f416377e15d
NanoCore
a70a683c541f11a78b9f07bf9e11d8f0f593cd7795fa213b3c1db17c284ee4dc
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ac8a58b595935beadffe17dbb536d1a015ff5b1b7681ddae0d781afaa8caa253
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b1135688496020eb3e075121b22fb9c726c6021068ce415be82d8e48540dc563
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d1a5575165e8b38282aea76864b4e01f906ee5177d2376c8a6a4fa4d4fd520fe
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df55898a2e3ad76e9ca691d178e15d2c499f391be7ed604a10ea7084e02d9446
NanoCore
+ 1'509 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/200806-ck96e81wg2/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Checks whether UAC is enabled
NanoCore
Malware Config
C2 Extraction:
billionaire.ddns.net:3734
Malware family:
NanoCore
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/3cb221973d52/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/3cb221973d52d12fc900f37496a9c5f77b30da63886a0f7d54111982c00e872b

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 0f13df07fb8d92d3c1acc3b799dbbef6f7a45158bd33c08e74a5f29b0b450965

NanoCore

Executable exe 3cb221973d52d12fc900f37496a9c5f77b30da63886a0f7d54111982c00e872b

(this sample)

  
Dropped by
MD5 a9b290d91ba6392acbbcf916e27e0b4b
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/40084/
  
Dropped by
SHA256 0f13df07fb8d92d3c1acc3b799dbbef6f7a45158bd33c08e74a5f29b0b450965

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