MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2fb71375a979e8a271a2793b9f09e7f5f740fdc68057ad983647a1e01a121130. 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 3 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2fb71375a979e8a271a2793b9f09e7f5f740fdc68057ad983647a1e01a121130
SHA3-384 hash: c5ca02aad6ea3dc9ec4c58f97ecc1b449c4831bce4f28e2dac10e3790cf60c4f76cb9de805c1bac8737c95104c8e64a2
SHA1 hash: 1aa86a9dc92439f64e13c907f28ff3637edf6de9
MD5 hash: 430dbfc5a121697ed066809cbf1ed3a3
humanhash: indigo-beryllium-jupiter-bluebird
File name:430dbfc5a121697ed066809cbf1ed3a3
Download: download sample
Signature NanoCore
Create hunting rule
File size:1'033'216 bytes
First seen:2021-09-23 08:20:50 UTC
Last seen:2021-09-23 11:12:13 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'743 x AgentTesla, 19'608 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:YtVlFVDL1VVtwhpyrDdV91VB1+BRhRhRKiFTf43upVsgynb21G+IAOKlRnDYP+5I:9FzVsgC21G985y+5LQURgQfNPfzTZ9i
Threatray 13'054 similar samples on MalwareBazaar
TLSH T14425AD3232861F98D03D4774042E95C0A3F9AB46BB96CB6E7DEB934C4F11A0F672651E
Reporter zbetcheckin
Tags:32 exe NanoCore

Intelligence

File Origin
# of uploads :
2
# of downloads :
228
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
2fb71375a979e8a271a2793b9f09e7f5f740fdc68057ad983647a1e01a121130.bin
Verdict:
Malicious activity
Analysis date:
2021-09-23 07:28:49 UTC
Tags:
trojan nanocore rat
Link:
https://app.any.run/tasks/8cc90786-d843-4b1d-b53f-609b452d081f

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/190689/
Detection(s):
SecuriteInfo.com.Trojan.MSIL.Downeks.lc.21316.21468.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/c26c8447-1cb8-423b-9c71-cd726793d5eb
Result
Threat name:
Nanocore AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/856291
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Allocates memory in foreign processes
Antivirus detection for dropped file
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)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Sigma detected: NanoCore
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AgentTesla
Yara detected Nanocore RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 488722 Sample: 1TXaS3Ycdt Startdate: 23/09/2021 Architecture: WINDOWS Score: 100 72 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->72 74 Malicious sample detected (through community Yara rule) 2->74 76 Multi AV Scanner detection for submitted file 2->76 78 7 other signatures 2->78 8 explooor.exe 14 4 2->8         started        13 1TXaS3Ycdt.exe 15 7 2->13         started        15 InstallUtil.exe 2->15         started        17 2 other processes 2->17 process3 dnsIp4 68 192.168.2.1 unknown unknown 8->68 54 C:\Users\user\AppData\Roaming\ammero.exe, PE32 8->54 dropped 92 Multi AV Scanner detection for dropped file 8->92 94 Machine Learning detection for dropped file 8->94 96 Writes to foreign memory regions 8->96 100 2 other signatures 8->100 19 ammero.exe 2 8->19         started        22 InstallUtil.exe 8->22         started        70 www.google.com 142.250.180.196, 443, 49742, 49746 GOOGLEUS United States 13->70 56 C:\Users\user\AppData\Roaming\explooor.exe, PE32 13->56 dropped 58 C:\Users\user\AppData\...\InstallUtil.exe, PE32 13->58 dropped 60 C:\Users\...\explooor.exe:Zone.Identifier, ASCII 13->60 dropped 62 C:\Users\user\AppData\...\1TXaS3Ycdt.exe.log, ASCII 13->62 dropped 98 Hides that the sample has been downloaded from the Internet (zone.identifier) 13->98 26 explooor.exe 3 13->26         started        28 cmd.exe 1 13->28         started        30 conhost.exe 15->30         started        32 conhost.exe 17->32         started        34 conhost.exe 17->34         started        file5 signatures6 process7 dnsIp8 80 Antivirus detection for dropped file 19->80 82 Multi AV Scanner detection for dropped file 19->82 84 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 19->84 90 2 other signatures 19->90 64 185.140.53.52, 4488, 49789, 49790 DAVID_CRAIGGG Sweden 22->64 48 C:\Users\user\AppData\Roaming\...\run.dat, data 22->48 dropped 50 C:\Users\user\AppData\Local\...\tmp331E.tmp, XML 22->50 dropped 52 C:\Program Files (x86)\...\dhcpmon.exe, PE32 22->52 dropped 86 Uses schtasks.exe or at.exe to add and modify task schedules 22->86 88 Hides that the sample has been downloaded from the Internet (zone.identifier) 22->88 36 schtasks.exe 22->36         started        38 schtasks.exe 22->38         started        66 www.google.com 26->66 40 conhost.exe 28->40         started        42 reg.exe 1 1 28->42         started        file9 signatures10 process11 process12 44 conhost.exe 36->44         started        46 conhost.exe 38->46         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2fb71375a979e8a271a2793b9f09e7f5f740fdc68057ad983647a1e01a121130/
Threat name:
Win32.Trojan.Downeks
Create hunting rule
Status:
Malicious
First seen:
2021-09-23 03:15:31 UTC
AV detection:
18 of 45 (40.00%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
nanocorerat
Create hunting rule
agenttesla
Create hunting rule
Similar samples:
0cbbdd2c9615f4d2de4e0232ace6b69889a54538444838ac6616a5aa39109c98
NanoCore
2f4223fec053d607cd7a1e13602545d061fa6b1745eb59bc7962d1ee35917582
NanoCore
623d707cab5c5dc378a5100018e29f88949f4ea4be4b34cc2fc36e1612b68100
NanoCore
68bf0a42854ac13fe13a75bb213f51934a3edc0fa7a0732ddb12a68699619474
NanoCore
7a388ead62a8f818b36c9c9a1938c2172c4fa05edfc71307980131c53c69d054
NanoCore
7da044c42ca2197b24b974350ae45f50ba9573714685c175026ff4a29a57973b
NanoCore
90c16db8c607f8ea1d0ed85c003b30692128327b4593e2fb45121a564fac6c11
NanoCore
b07ef4c584528991957dfbc17e62984fe06a6ae8ab441062b3d6910bbedf36b5
NanoCore
cac57f9210fa4d8fb970249750db6886d99f31e503cdeb6e4641bf1c0055afe7
NanoCore
ddaaa650d42caaed5ddd7c307b986cdccfc25bcb84c7a4f29f9fddd26add4135
NanoCore
+ 13'044 additional samples on MalwareBazaar
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla family:nanocore agilenet evasion keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/210923-j8z32addf4/
Behaviour
Creates scheduled task(s)
Modifies system certificate store
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Program Files directory
Suspicious use of SetThreadContext
Adds Run key to start application
Checks whether UAC is enabled
Loads dropped DLL
Obfuscated with Agile.Net obfuscator
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Executes dropped EXE
AgentTesla Payload
AgentTesla
NanoCore
Malware Config
C2 Extraction:
185.140.53.52:4488
Unpacked files
SH256 hash:
2fb71375a979e8a271a2793b9f09e7f5f740fdc68057ad983647a1e01a121130
MD5 hash:
430dbfc5a121697ed066809cbf1ed3a3
SHA1 hash:
1aa86a9dc92439f64e13c907f28ff3637edf6de9
Link:
https://www.unpac.me/results/238bf8b1-f89c-4322-9195-748ac8eb2c96/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.51
Link:
https://yomi.yoroi.company/submissions/2fb71375a979e8a271a2793b9f09e7f5f740fdc68057ad983647a1e01a121130

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: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

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

NanoCore

Executable exe 2fb71375a979e8a271a2793b9f09e7f5f740fdc68057ad983647a1e01a121130

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1640610/
Cape
Cape
https://www.capesandbox.com/analysis/190689/

Comments


Avatar
zbet commented on 2021-09-23 08:20:51 UTC

url : hxxp://anka-tek.com.tr/AUG/Explore.exe