MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 91ec8e2e85917775a7055500c887bf49371679f772bd917c69dfb2b628f4a680. 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: 9


Intelligence 9 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 91ec8e2e85917775a7055500c887bf49371679f772bd917c69dfb2b628f4a680
SHA3-384 hash: 9f9720b6c2f060916c62d3e1ef9c223d749ddeb14e93fc6a76c8f0a72bc185d99b338cdd3c9f662153653b5e12b365d3
SHA1 hash: 545c5fc62283efdc09c1a2a8e62e43f9035c8b03
MD5 hash: 4b64df0df55645e1fda431e95191f770
humanhash: snake-foxtrot-mississippi-fix
File name:FedEx's AWB#5305323204643 (2).exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:516'096 bytes
First seen:2020-07-16 07:05:39 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:g5t2k4zUKifLRO3/T5X2h+7PmAz5xZf5+8IQU:gPTR6b5ms7mA
Threatray 2'664 similar samples on MalwareBazaar
TLSH 7BB47ACC3950759EC84E8D768964DC70A6202D62F7FBD20763C32E9FB93D696CB051A2
Reporter abuse_ch
Tags:exe FedEx NanoCore nVpn RAT


Avatar
abuse_ch
Malspam distributing NanoCore:

HELO: hwsrv-748333.hostwindsdns.com
Sending IP: 192.236.198.19
From: FedEx <track@fedex.com>
Subject: FedEx's AWB#5305323204643 - Information is required
Attachment: FedExs AWB5305323204643 2.zip (contains "FedEx's AWB#5305323204643 (2).exe")

NanoCore RAT C2:
annapro55.ddns.net:2121 (185.140.53.167)

Pointing to nVpn:

% Information related to '185.140.53.0 - 185.140.53.255'

% Abuse contact for '185.140.53.0 - 185.140.53.255' is 'abuse@privacyfirst.sh'

inetnum: 185.140.53.0 - 185.140.53.255
remarks: This prefix is assigned to The PRIVACYFIRST Project, which
remarks: operates infrastructure jointly used by various VPN service
remarks: providers. We have a very strong focus on privacy and freedom.
remarks: In case of abuse, we encourage all international law enforcement
remarks: agencies to get in touch with our abuse contact. Due to the fact
remarks: that we keep no logs of user activities and only share data when
remarks: it is legally required under our jurisdiction, it is very unlikely
remarks: for a demand of user information to be successful. Still, that
remarks: should not deter you from reaching out.
netname: PRIVACYFIRST-NL4-BE
country: EU
descr: Amsterdam, Netherlands
descr: Brussels, Belgium
admin-c: TPP15-RIPE
tech-c: TPP15-RIPE
org: ORG-TPP6-RIPE
status: ASSIGNED PA
mnt-by: PRIVACYFIRST-MNT
created: 2016-10-17T23:24:00Z
last-modified: 2020-07-14T13:31:17Z
source: RIPE

Intelligence

File Origin
# of uploads :
1
# of downloads :
94
Origin country :
n/a
Vendor Threat Intelligence
Detection:
NanoCore
Create hunting rule
Link:
https://www.capesandbox.com/analysis/26425/
Detection(s):
SecuriteInfo.com.CAP_HookExKeylogger.25179.20566.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
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 in the %AppData% subdirectories
DNS request
Forced shutdown of a system process
Sending a TCP request to an infection source
Enabling autorun with Startup directory
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/389377
Signature
.NET source code contains potential unpacker
Detected Nanocore Rat
Found malware configuration
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: Scheduled temp file as task from temp location
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Nanocore RAT
Behaviour
Behavior Graph:
Download SVG
Detection:
nanocore
Create hunting rule
Link:
https://mwdb.cert.pl/sample/91ec8e2e85917775a7055500c887bf49371679f772bd917c69dfb2b628f4a680/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-07-16 07:07:05 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=shwi4lufsf3xljyfkuamrb57je3rm6pxok6zc7dj36zlmkhuu2aa._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
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NanoCore
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4291277336e3c27f2cc05278635f7724fa2ff4af06a547ca5a04ac91c3d71fa0
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55a85320a226d58c12355a5836a77fd17fd270fefa30612da9e6a79b9f17b222
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67fef2f83af3da398f5e144ccc65e18d7d30b57f53d94658cd62fe53d5e3d81b
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953b28fd61cb8eb78e1fca699aead009a12bb5a0a6a8d42b0447cbe2bf828143
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a6fa24e0210cf4e792b983adf65416871b6a4792fbd5ba3ccaf15484159c776b
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a9e29436ef50f76f0d8c46e62205491e8acbea0e22f38fcbd5d38719264897d1
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aec83b31afe9607016c7698162d85240a7a17d5399b99bb92572fa36f173e738
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e3cfd3d090923b878c13c989b6b7c65e8ee788b70dcce22db4f6798754082eef
NanoCore
+ 2'654 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/200716-lw1eh1h5tj/
Behaviour
Suspicious behavior: GetForegroundWindowSpam
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetThreadContext
Checks whether UAC is enabled
NanoCore
Malware Config
C2 Extraction:
185.244.30.139:2121
annapro55.ddns.net:2121
Please note that we are no longer able to provide a coverage score for Virus Total.

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:CAP_HookExKeylogger
Create hunting rule
Author:Brian C. Bell -- @biebsmalwareguy
Reference:https://github.com/DFIRnotes/rules/blob/master/CAP_HookExKeylogger.yar
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 f36cfd00d94df3980d296a227ed0e14830a48c9adaa9f945dbcdee1edfe38b2f

NanoCore

Executable exe 91ec8e2e85917775a7055500c887bf49371679f772bd917c69dfb2b628f4a680

(this sample)

  
Dropped by
MD5 8156100a2bee49db26d671fe083f2f6a
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/26425/
  
Dropped by
SHA256 f36cfd00d94df3980d296a227ed0e14830a48c9adaa9f945dbcdee1edfe38b2f

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