MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 99b69c71a045d2993d1d6076a70f372e4924e02ad7c58482d54eb748675c1b1d. 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: 14


Intelligence 14 IOCs 1 YARA 11 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 99b69c71a045d2993d1d6076a70f372e4924e02ad7c58482d54eb748675c1b1d
SHA3-384 hash: 3b9ee1231fbc95663ae573de7d24a626452e4475e06f5fad26cb5ee99625ed806b2de492b5cdb38ee2acd5785ee86566
SHA1 hash: 4fd54e446f8a2287db5e42be46f09aa0e6cdc635
MD5 hash: aab31641a4db94d6eb6913c12116d15b
humanhash: juliet-may-princess-happy
File name:aab31641a4db94d6eb6913c12116d15b.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:207'872 bytes
First seen:2021-09-10 18:56:30 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'609 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 3072:OzEqV6B1jHa6dtJ10jgvzcgi+oG/j9iaMP2s/HIMIP+1Nda82N+xdkv9iRLGeQLC:OLV6Bta6dtJmakIM5MkAgNp3
Threatray 2'836 similar samples on MalwareBazaar
TLSH T19B14CF267BF98A2FE2DE86B9611212028379C2E3D9C3F3DA18D455B35F267E506071D3
Reporter abuse_ch
Tags:exe NanoCore RAT


Avatar
abuse_ch
NanoCore C2:
93.118.32.31:54984

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
93.118.32.31:54984 https://threatfox.abuse.ch/ioc/218049/

Intelligence

File Origin
# of uploads :
1
# of downloads :
534
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
aab31641a4db94d6eb6913c12116d15b.exe
Verdict:
Malicious activity
Analysis date:
2021-09-10 18:59:24 UTC
Tags:
rat nanocore
Link:
https://app.any.run/tasks/4c710672-57f4-4afe-a766-406a46c7c3f8

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
NanoCore
Create hunting rule
Link:
https://www.capesandbox.com/analysis/186957/
Detection(s):
Win.Trojan.NanoCore-9852758-0
Create hunting rule

Win.Trojan.Nanocore-5
Create hunting rule

Win.Packed.Generic-9777790-0
Create hunting rule

Win.Trojan.Generic-9783914-0
Create hunting rule

Win.Dropper.Nancrat-9869495-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file in the Program Files subdirectories
Creating a file in the %temp% directory
Launching a process
Deleting a recently created file
DNS request
Connection attempt
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Sending a UDP request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun by creating a file
Malware family:
NanoCoreRAT
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/b220f8a3-fa51-4995-82bc-64767a0f2731
Result
Threat name:
Nanocore
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/848988
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Detected Nanocore Rat
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
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
Protects its processes via BreakOnTermination flag
Sigma detected: NanoCore
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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
behaviorgraph top1 signatures2 2 Behavior Graph ID: 481419 Sample: bZhJxMfUg3.exe Startdate: 10/09/2021 Architecture: WINDOWS Score: 100 42 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->42 44 Found malware configuration 2->44 46 Malicious sample detected (through community Yara rule) 2->46 48 12 other signatures 2->48 7 bZhJxMfUg3.exe 1 16 2->7         started        12 bZhJxMfUg3.exe 3 2->12         started        14 dhcpmon.exe 3 2->14         started        16 dhcpmon.exe 2 2->16         started        process3 dnsIp4 38 rzf9k8gh4.duckdns.org 93.118.32.31, 49736, 49737, 49738 FIRSTHEBERGFR France 7->38 40 ll4rzd8w5.ddns.net 7->40 26 C:\Program Files\DHCP Monitor\dhcpmon.exe, PE32 7->26 dropped 28 C:\Users\user\AppData\Roaming\...\run.dat, ISO-8859 7->28 dropped 30 C:\Users\user\AppData\Local\...\tmpAAA5.tmp, XML 7->30 dropped 32 C:\...\dhcpmon.exe:Zone.Identifier, ASCII 7->32 dropped 50 Protects its processes via BreakOnTermination flag 7->50 52 Uses schtasks.exe or at.exe to add and modify task schedules 7->52 54 Hides that the sample has been downloaded from the Internet (zone.identifier) 7->54 18 schtasks.exe 1 7->18         started        20 schtasks.exe 1 7->20         started        34 C:\Users\user\AppData\...\bZhJxMfUg3.exe.log, ASCII 12->34 dropped 36 C:\Users\user\AppData\...\dhcpmon.exe.log, ASCII 14->36 dropped file5 signatures6 process7 process8 22 conhost.exe 18->22         started        24 conhost.exe 20->24         started       
Detection:
nanocore
Create hunting rule
Link:
https://mwdb.cert.pl/sample/99b69c71a045d2993d1d6076a70f372e4924e02ad7c58482d54eb748675c1b1d/
Threat name:
ByteCode-MSIL.Backdoor.NanoCore
Create hunting rule
Status:
Malicious
First seen:
2021-09-06 05:52:54 UTC
AV detection:
36 of 37 (97.30%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=tg3jy4naixjjspi5mb3kodzxfzesjybk27cyjawvj23uqz24dmoq._file
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
Similar samples:
1f39a6b78d949b49801703687e3ee181ddfba0e21b13e094f584808d5030ebe2
NanoCore
24f649ba2d0821e1ac7c9bdc28a03c29e0494d5a52913343ae1ed8112d8acb84
NanoCore
49abcf0d1c7d7e842a7ef63b1be4173d37b24414ada511e21cf5643ca539d093
NanoCore
557848d9b6d6964fb3a1fc44279c7b9e728d48b659f73c2d3aed2953d083e8c5
NanoCore
6ac81ad425d5c181006b6cce9ebdd5ab5fcca808df15736d9bcbf561d216e447
NanoCore
6db62dd5519b4afb93f0b949b741d384525425f1032ecc52e7196d34243cca4b
NanoCore
a276b0d2aaf8a132ffbe9ae16763975bcf38fc1e5a6419890712fc3de02b793f
NanoCore
b982293fd90384c609fb3879b14af3ab6a780c0cb9f3cb6baf1fe81a3f400e29
NanoCore
+ 2'826 additional samples on MalwareBazaar
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:nanocore evasion keylogger persistence spyware stealer suricata trojan
Link:
https://tria.ge/reports/210910-xlxahsdfcr/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Drops file in Program Files directory
Adds Run key to start application
Checks whether UAC is enabled
NanoCore
suricata: ET MALWARE Possible NanoCore C2 60B
Malware Config
C2 Extraction:
ll4rzd8w5.ddns.net:54984
rzf9k8gh4.duckdns.org:54984
Unpacked files
SH256 hash:
99b69c71a045d2993d1d6076a70f372e4924e02ad7c58482d54eb748675c1b1d
MD5 hash:
aab31641a4db94d6eb6913c12116d15b
SHA1 hash:
4fd54e446f8a2287db5e42be46f09aa0e6cdc635
Detections:
win_nanocore_w0
Create hunting rule
Link:
https://www.unpac.me/results/91e29777-3bd1-44e1-a985-5ab103e0254e/
Malware family:
NanoCore
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/99b69c71a045/report/overview.html
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/99b69c71a045d2993d1d6076a70f372e4924e02ad7c58482d54eb748675c1b1d

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
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_Feb18_1_RID2DF1
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:Nanocore_RAT_Gen_2_RID2D96
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:pe_imphash
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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.

Cape
Cape
https://www.capesandbox.com/analysis/186957/

Comments