MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 38e808b501a37c1331be6a4355ff59cded87bb6316d4fac99bf4216647417996. 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 7 File information Comments
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SHA256 hash: 38e808b501a37c1331be6a4355ff59cded87bb6316d4fac99bf4216647417996
SHA3-384 hash: 90d404617cedfd0a00f776f44278e51d539e8cc35215e081d9e363311167d04624bd077c7d530637abc56409dcbd4155
SHA1 hash: 1eb8654163bc238b4ee97826969017faa09e2a6c
MD5 hash: 6bb5efb9369c6e501d3da40858e283b1
humanhash: nuts-neptune-fifteen-september
File name:CN-Invoice-XXXXX9808-19011143287990.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:185'344 bytes
First seen:2021-02-19 07:02:58 UTC
Last seen:2021-02-19 08:36:23 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 1536:kAT5CPKEBolfpKjCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCXCCCCCCI:OPbolfIpmRZtBs
Threatray 1'613 similar samples on MalwareBazaar
TLSH A90436DE02F1105FE12945B4A999EFE01961ECB8BB52C615BD40FCCEBE723E154622F2
Reporter abuse_ch
Tags:exe FedEx NanoCore RAT


Avatar
abuse_ch
Malspam distributing NanoCore:

HELO: [192.188.88.227]
Sending IP: 192.188.88.227
From: FedEx Express - Do Not Reply <Carrie.Park@expeditors.com>
Reply-To: nopeply-fedeoxngr@iname.com
Subject: [CN]: FedEx Invoice 账单 (CustomerAccount -XXXXX9808-19011143287990)
Attachment: CN-Invoice-XXXXX9808-19011143287990.iso (contains "CN-Invoice-XXXXX9808-19011143287990.exe")

NanoCore RAT C2:
nanopc.linkpc.net:50005 (185.157.161.86)

Intelligence

File Origin
# of uploads :
2
# of downloads :
113
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/117896/
Detection(s):
SecuriteInfo.com.Variant.MSILHeracles.11969.17611.2296.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a process
Creating a process with a hidden window
Creating a file in the Windows subdirectories
Creating a file in the %temp% subdirectories
Creating a process from a recently created file
Launching a service
Sending a UDP request
Deleting a recently created file
Running batch commands
Adding an access-denied ACE
Creating a file
Creating a file in the %AppData% subdirectories
DNS request
Setting a single autorun event
Connection attempt to an infection source
Sending an HTTP GET request to an infection source
Adding exclusions to Windows Defender
Unauthorized injection to a system process
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/612329
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
Binary contains a suspicious time stamp
C2 URLs / IPs found in malware configuration
Changes security center settings (notifications, updates, antivirus, firewall)
Contains functionality to hide a thread from the debugger
Creates an autostart registry key pointing to binary in C:\Windows
Detected Nanocore Rat
Drops executables to the windows directory (C:\Windows) and starts them
Drops PE files with benign system names
Executable has a suspicious name (potential lure to open the executable)
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Hides threads from debuggers
Icon mismatch, binary includes an icon from a different legit application in order to fool users
Initial sample is a PE file and has a suspicious name
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: Suspicious Svchost Process
Sigma detected: System File Execution Location Anomaly
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
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: 355177 Sample: CN-Invoice-XXXXX9808-190111... Startdate: 19/02/2021 Architecture: WINDOWS Score: 100 61 nanopc.linkpc.net 2->61 71 Found malware configuration 2->71 73 Malicious sample detected (through community Yara rule) 2->73 75 Icon mismatch, binary includes an icon from a different legit application in order to fool users 2->75 77 15 other signatures 2->77 8 CN-Invoice-XXXXX9808-19011143287990.exe 23 9 2->8         started        13 explorer.exe 2->13         started        15 explorer.exe 2->15         started        17 9 other processes 2->17 signatures3 process4 dnsIp5 67 192.236.147.189, 49714, 49721, 49723 HOSTWINDSUS United States 8->67 55 C:\Windows\Resources\Themes\...\svchost.exe, PE32 8->55 dropped 57 C:\Windows\...\svchost.exe:Zone.Identifier, ASCII 8->57 dropped 59 C:\Users\user\AppData\...\AdvancedRun.exe, PE32 8->59 dropped 93 Creates an autostart registry key pointing to binary in C:\Windows 8->93 95 Writes to foreign memory regions 8->95 97 Allocates memory in foreign processes 8->97 103 5 other signatures 8->103 19 CasPol.exe 8->19         started        24 AdvancedRun.exe 1 8->24         started        26 cmd.exe 8->26         started        34 3 other processes 8->34 28 svchost.exe 13->28         started        99 Drops executables to the windows directory (C:\Windows) and starts them 15->99 30 svchost.exe 15->30         started        69 127.0.0.1 unknown unknown 17->69 101 Changes security center settings (notifications, updates, antivirus, firewall) 17->101 32 WerFault.exe 17->32         started        file6 signatures7 process8 dnsIp9 63 nanopc.linkpc.net 185.157.161.86, 50005 OBE-EUROPEObenetworkEuropeSE Sweden 19->63 49 C:\Users\user\AppData\Roaming\...\run.dat, Dyalog 19->49 dropped 79 Hides that the sample has been downloaded from the Internet (zone.identifier) 19->79 36 AdvancedRun.exe 24->36         started        39 conhost.exe 26->39         started        41 timeout.exe 26->41         started        51 C:\Users\user\AppData\...\AdvancedRun.exe, PE32 28->51 dropped 81 Multi AV Scanner detection for dropped file 28->81 83 Machine Learning detection for dropped file 28->83 85 Adds a directory exclusion to Windows Defender 28->85 87 Injects a PE file into a foreign processes 28->87 43 powershell.exe 28->43         started        53 C:\Users\user\AppData\...\AdvancedRun.exe, PE32 30->53 dropped 89 System process connects to network (likely due to code injection or exploit) 30->89 91 Hides threads from debuggers 30->91 45 conhost.exe 34->45         started        47 conhost.exe 34->47         started        file10 signatures11 process12 dnsIp13 65 192.168.2.1 unknown unknown 36->65
Detection:
nanocore
Create hunting rule
Link:
https://mwdb.cert.pl/sample/38e808b501a37c1331be6a4355ff59cded87bb6316d4fac99bf4216647417996/
Threat name:
ByteCode-MSIL.Backdoor.Heracles
Create hunting rule
Status:
Malicious
First seen:
2021-02-19 04:53:52 UTC
AV detection:
11 of 48 (22.92%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=hduarnibun6bgmn6njbvl72zzxwypo3dc3kpvsm36qqwmr2bpgla._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
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NanoCore
+ 1'603 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/210219-jhqrtwzdzn/
Behaviour
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Windows security modification
Executes dropped EXE
Nirsoft
Modifies Windows Defender Real-time Protection settings
NanoCore
Turns off Windows Defender SpyNet reporting
Windows security bypass
Malware Config
C2 Extraction:
nanopc.linkpc.net:50005
185.157.161.86:50005
Unpacked files
SH256 hash:
38e808b501a37c1331be6a4355ff59cded87bb6316d4fac99bf4216647417996
MD5 hash:
6bb5efb9369c6e501d3da40858e283b1
SHA1 hash:
1eb8654163bc238b4ee97826969017faa09e2a6c
Link:
https://www.unpac.me/results/855f9db6-c8fb-4355-a733-f7c4b6ecbe1b/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Nanocore
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/38e808b501a37c1331be6a4355ff59cded87bb6316d4fac99bf4216647417996

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:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
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.

Malspam

NanoCore

iso d457d8dc5792eb1d1433b4a1ae5aa094e287d0d7097cec4477b9cbc00add51ba

NanoCore

Executable exe 38e808b501a37c1331be6a4355ff59cded87bb6316d4fac99bf4216647417996

(this sample)

  
Dropped by
MD5 c38fa182f39580d42af7b62ecc10a079
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/117896/
  
Dropped by
SHA256 d457d8dc5792eb1d1433b4a1ae5aa094e287d0d7097cec4477b9cbc00add51ba

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