MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d86628ed9c58fadce80cac836d949eb6dac45d1671a76d77ed4d39fe5db93bd8. 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: 11


Intelligence 11 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d86628ed9c58fadce80cac836d949eb6dac45d1671a76d77ed4d39fe5db93bd8
SHA3-384 hash: 877d0d58da7b1056d0d7b3b07bb22053c1d9b5799fbbb303e187b2e6f0c5c3e9ebcd7a725dc3a6c3d6f8e5c24819b742
SHA1 hash: 39d1d9c8416380c967c7eda4de6ddc5cf2a5c8f4
MD5 hash: 4e2e5429ef978cde8873d5354606cf77
humanhash: network-bravo-network-hydrogen
File name:Ref671005018.xla
Download: download sample
Signature NanoCore
Create hunting rule
File size:238'592 bytes
First seen:2022-10-26 13:39:03 UTC
Last seen:2022-10-28 07:46:31 UTC
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 6144:yk3hOdsylKlgryzc4bNhZF+E+W2knA1ADM/NuNNFNNXNNuNNdNNPNNaNNbNNWNNb:GAcNuNNFNNXNNuNNdNNPNNaNNbNNWNNb
TLSH T1DA34D5BAB2C0E978D19809734CE4351AB33E8F679A890D937578B70C5D373A15C23B69
TrID 46.5% (.XLS) Microsoft Excel sheet (alternate) (56500/1/4)
26.7% (.XLS) Microsoft Excel sheet (32500/1/3)
20.1% (.XLS) Microsoft Excel sheet (alternate) (24500/1/2)
6.5% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter 0xToxin
Tags:NanoCore xlsx

Intelligence

File Origin
# of uploads :
2
# of downloads :
273
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Ref671005018.xla
Verdict:
No threats detected
Analysis date:
2022-10-26 13:43:32 UTC
Tags:
macros macros-on-open
Link:
https://app.any.run/tasks/e87223e3-089e-472e-87c0-5b78eb588653

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Has a screenshot:
False
Contains macros:
True
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/324413/
Detection(s):
MiscreantPunch.EvilMacro.AODBWSRBMS.UNOFFICIAL
Create hunting rule

Doc.Dropper.Agent-6412232-1
Create hunting rule

SecuriteInfo.com.Office.Macro-11.UNOFFICIAL
Create hunting rule

Sanesecurity.Badmacro.Xls.Wshell.G.UNOFFICIAL
Create hunting rule

Sanesecurity.Badmacro.Xls.run.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Creating a file in the %temp% directory
Searching for synchronization primitives
Creating a file
Enabling the 'hidden' option for files in the %temp% directory
Launching a process
Query of malicious DNS domain
Sending an HTTP GET request to an infection source by exploiting the app vulnerability
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/d86628ed9c58fadce80cac836d949eb6dac45d1671a76d77ed4d39fe5db93bd8/results/dashboard
Payload URLs
URL
File name
http://oslobikerental.no.ww18.online4u.no/wp-includes/ID2/ups/Ref671005018.exe
ThisWorkbook
Behaviour
BlacklistAPI detected
Label:
Malicious
Suspicious Score:
9.9/10
Score Malicious:
99%
Score Benign:
0%
Link:
https://www.malware.ai/gui/files/?id=dc986ae5-9435-47ba-8822-5590f1fa429d
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/d86628ed9c58fadce80cac836d949eb6dac45d1671a76d77ed4d39fe5db93bd8
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Macro with File System Write
Detected macro logic that can write data to the file system.
Macro Contains Suspicious String
Detected a macro with a suspicious string. Suspicious strings include privileged function calls, obfuscations, odd registry keys, etc...
Result
Threat name:
Unknown
Detection:
malicious
Classification:
expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1098526
Signature
Antivirus detection for dropped file
Antivirus detection for URL or domain
Creates autostart registry keys with suspicious values (likely registry only malware)
Creates multiple autostart registry keys
Document contains an embedded VBA macro which may execute processes
Document contains an embedded VBA macro with suspicious strings
Document contains an embedded VBA with functions possibly related to ADO stream file operations
Document contains an embedded VBA with functions possibly related to HTTP operations
Document exploit detected (creates forbidden files)
Document exploit detected (drops PE files)
Document exploit detected (process start blacklist hit)
Drops PE files with benign system names
Machine Learning detection for sample
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office process drops PE file
Snort IDS alert for network traffic
Yara detected AntiVM autoit script
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 731176 Sample: Ref671005018.xla.xlsx Startdate: 26/10/2022 Architecture: WINDOWS Score: 100 78 Snort IDS alert for network traffic 2->78 80 Multi AV Scanner detection for domain / URL 2->80 82 Antivirus detection for URL or domain 2->82 84 12 other signatures 2->84 9 EXCEL.EXE 6 20 2->9         started        14 wscript.exe 1 2->14         started        16 wscript.exe 2->16         started        18 4 other processes 2->18 process3 dnsIp4 76 oslobikerental.no.ww18.online4u.no 213.160.235.113, 49171, 80 ASN-CATCHCOMNO Norway 9->76 70 C:\Users\user\AppData\Local\...\svchost.exe, PE32 9->70 dropped 72 C:\Users\user\AppData\...\Ref671005018[1].exe, PE32 9->72 dropped 74 C:\Users\user\...\~$Ref671005018.xla.xlsx, data 9->74 dropped 106 Document exploit detected (creates forbidden files) 9->106 20 svchost.exe 41 9->20         started        24 cmd.exe 14->24         started        26 cmd.exe 16->26         started        28 cmd.exe 18->28         started        30 cmd.exe 18->30         started        32 cmd.exe 18->32         started        file5 signatures6 process7 file8 62 C:\Users\user\AppData\Local\Temp\...\gst.exe, PE32 20->62 dropped 64 C:\Users\user\AppData\Local\...\ddkvmcjj.exe, PE32 20->64 dropped 88 Multi AV Scanner detection for dropped file 20->88 34 gst.exe 35 20->34         started        38 wscript.exe 2 1 20->38         started        40 ddkvmcjj.exe 1 24->40         started        42 ddkvmcjj.exe 26->42         started        44 ddkvmcjj.exe 28->44         started        46 akfng.exe 30->46         started        48 akfng.exe 32->48         started        signatures9 process10 file11 60 C:\Users\user\AppData\Local\...\akfng.exe, PE32 34->60 dropped 86 Multi AV Scanner detection for dropped file 34->86 50 wscript.exe 34->50         started        52 ddkvmcjj.exe 2 6 38->52         started        signatures12 process13 file14 56 akfng.exe 50->56         started        66 C:\Users\user\AppData\Local\...\start.vbs, ASCII 52->66 dropped 90 Antivirus detection for dropped file 52->90 92 Multi AV Scanner detection for dropped file 52->92 94 Creates autostart registry keys with suspicious values (likely registry only malware) 52->94 96 Creates multiple autostart registry keys 52->96 signatures15 process16 file17 68 C:\Users\user\AppData\Local\...\start.vbs, ASCII 56->68 dropped 98 Antivirus detection for dropped file 56->98 100 Multi AV Scanner detection for dropped file 56->100 102 Creates autostart registry keys with suspicious values (likely registry only malware) 56->102 104 Creates multiple autostart registry keys 56->104 signatures18
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d86628ed9c58fadce80cac836d949eb6dac45d1671a76d77ed4d39fe5db93bd8/
Threat name:
Document-Word.Trojan.Valyria
Create hunting rule
Status:
Malicious
First seen:
2022-10-26 10:04:11 UTC
File Type:
Document
Extracted files:
19
AV detection:
15 of 26 (57.69%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=3btcr3m4ld5nz2amvsbw3fe6w3nmixiwogtw257nju474xnzhpma._file
Result
Malware family:
nanocore
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla family:nanocore collection keylogger macro macro_on_action persistence spyware stealer trojan
Link:
https://tria.ge/reports/221026-qxyt6afher/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Adds Run key to start application
Looks up external IP address via web service
Checks computer location settings
Drops startup file
Loads dropped DLL
Downloads MZ/PE file
Executes dropped EXE
AgentTesla
NanoCore
Malware Config
C2 Extraction:
37.139.128.94:6000
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/d86628ed9c58fadce80cac836d949eb6dac45d1671a76d77ed4d39fe5db93bd8

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:BitcoinAddress
Create hunting rule
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address
Rule name:informational_win_ole_protected
Create hunting rule
Author:Jeff White (karttoon@gmail.com) @noottrak
Description:Identify OLE Project protection within documents.
Rule name:malware_shellcode_hash
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect shellcode api hash value
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:pdb_YARAify
Create hunting rule
Author:@wowabiy314
Description:PDB

File information

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

Malspam

NanoCore

Excel file xlsx d86628ed9c58fadce80cac836d949eb6dac45d1671a76d77ed4d39fe5db93bd8

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/324413/

Comments