MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 871cf9e52911f7083fd15362805aad6678eb529268a04916d8916ce423d43673. 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 5 File information Comments
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SHA256 hash: 871cf9e52911f7083fd15362805aad6678eb529268a04916d8916ce423d43673
SHA3-384 hash: e9130f2a2ebaa851a9c484b09e5a5c9d4121ee29562336c02f00a44d71abc781596580aa7e83413a94d8007a8fa16e6b
SHA1 hash: 71dff6f25c4e23315b1cc9a870be1f09e12d215a
MD5 hash: ae3db1717f4f206795c7bf16d4449df8
humanhash: equal-solar-shade-kitten
File name:j0sYkRZXxbN6U94.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:413'184 bytes
First seen:2020-08-07 15:49:34 UTC
Last seen:2020-08-07 16:33:39 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 12288:R/P8ace3EJzz7xVGs8nICU5y5nSJHpOWX+0grpiA:RXrO7GsUBU4xiOWXEQA
Threatray 1'147 similar samples on MalwareBazaar
TLSH 389412A807FDA7B7D9FC4AF054ED34002374AD82D643E7266F8634FFA456B500A853A6
Reporter James_inthe_box
Tags:exe NanoCore

Intelligence

File Origin
# of uploads :
2
# of downloads :
116
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/41700/
Detection(s):
SecuriteInfo.com.Fareit-FVTAE3DB1717F4F.3270.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %AppData% directory
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
Creating a file in the Program Files subdirectories
Connection attempt
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
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/415434
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
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
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
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: 259966 Sample: j0sYkRZXxbN6U94.exe Startdate: 07/08/2020 Architecture: WINDOWS Score: 100 40 Malicious sample detected (through community Yara rule) 2->40 42 Sigma detected: Scheduled temp file as task from temp location 2->42 44 Sigma detected: NanoCore 2->44 46 8 other signatures 2->46 7 j0sYkRZXxbN6U94.exe 7 2->7         started        11 dhcpmon.exe 4 2->11         started        process3 file4 24 C:\Users\user\AppData\...\HgysYIpqKL.exe, PE32 7->24 dropped 26 C:\Users\...\HgysYIpqKL.exe:Zone.Identifier, ASCII 7->26 dropped 28 C:\Users\user\AppData\Local\...\tmp44D9.tmp, XML 7->28 dropped 30 C:\Users\user\...\j0sYkRZXxbN6U94.exe.log, ASCII 7->30 dropped 48 Writes to foreign memory regions 7->48 50 Allocates memory in foreign processes 7->50 52 Injects a PE file into a foreign processes 7->52 54 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 7->54 13 RegSvcs.exe 1 10 7->13         started        18 schtasks.exe 1 7->18         started        20 conhost.exe 11->20         started        signatures5 process6 dnsIp7 36 185.165.153.188, 1985, 49716, 49720 DAVID_CRAIGGG Netherlands 13->36 38 127.0.0.1 unknown unknown 13->38 32 C:\Users\user\AppData\Roaming\...\run.dat, ISO-8859 13->32 dropped 34 C:\Program Files (x86)\...\dhcpmon.exe, PE32 13->34 dropped 56 Hides that the sample has been downloaded from the Internet (zone.identifier) 13->56 22 conhost.exe 18->22         started        file8 signatures9 process10
Detection:
nanocore
Create hunting rule
Link:
https://mwdb.cert.pl/sample/871cf9e52911f7083fd15362805aad6678eb529268a04916d8916ce423d43673/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-08-07 15:49:19 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=q4optzjjch3qqp6rknriawvnmz4owuusncqesfwysfwoii6ugzzq._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
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64c51fc10708dbd2fb676b2a95bd1330d4fe8099384713d0bea70c0c17928fec
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8f3ad5ccb61c668f7fbbc009cf0ea27396dd4fe80c0adb7b6daa86b136308252
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c5a9b35e88c8854b9ded651caf716d6ecf5e30454859c4a664d2120145bccc67
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d6fad316d9603cc8cf82b520043853ef4597124b2ffb86abf8b52b80e9f18a53
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f5ca4644c1340cd373374d09ecd052c57c8c8abef50c4ae280876497d3f40a64
NanoCore
+ 1'137 additional samples on MalwareBazaar
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
evasion trojan keylogger stealer spyware family:nanocore persistence
Link:
https://tria.ge/reports/200807-5rby9cy6xj/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: GetForegroundWindowSpam
Creates scheduled task(s)
Drops file in Program Files directory
Suspicious use of SetThreadContext
Checks whether UAC is enabled
Adds Run key to start application
NanoCore
Malware Config
C2 Extraction:
185.165.153.188:1985
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.45
Link:
https://yomi.yoroi.company/submissions/871cf9e52911f7083fd15362805aad6678eb529268a04916d8916ce423d43673

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
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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.

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/41700/

Comments