MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1139f4239fd43f2eb79f6858e5522a2df4d7b45f7103039c95f7fb49aae16291. 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

SHA256 hash:	1139f4239fd43f2eb79f6858e5522a2df4d7b45f7103039c95f7fb49aae16291
SHA3-384 hash:	73dbbfa413a47e5db65f225512c2a3b88ff72c897247fe5bdb1926d14a21ed2f2ebeae1cc4ed237faad2ad9804e2b799
SHA1 hash:	b08932f6f7dc54ceb6927ed287cc5f3c2e062d48
MD5 hash:	583e210e0eac6ce1b55b1e085fcc9119
humanhash:	orange-oscar-charlie-item
File name:	rooming.xlsx
Download:	download sample
Signature	NanoCore Alert Create hunting rule
File size:	290'936 bytes
First seen:	2022-07-11 14:28:57 UTC
Last seen:	2022-07-11 18:27:50 UTC
File type:	xlsx
MIME type:	application/encrypted
ssdeep	6144:HUQaehRFtNPMAd/B/Ms+eMs8ieUjC/PMSd+wzqONXU:TawFtCu/IGjYMe+wOONXU
TLSH	T1E5541201F619375FCE1359B366AE49D698A3DDD93DB2CE321023B60992F87A09C17933
Reporter	abuse_ch
Tags:	CVE-2018-0798 NanoCore VelvetSweatshop xlsx

Office OLE Information

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This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.

OLE dump

Detection: VelvetSweatshop

MalwareBazaar was able to identify 6 sections in this file using oledump:

Section ID	Section size	Section name
1	64 bytes	DataSpaces/DataSpaceInfo/StrongEncryptionDataSpace
2	112 bytes	DataSpaces/DataSpaceMap
3	208 bytes	DataSpaces/TransformInfo/StrongEncryptionTransform/Primary
4	76 bytes	DataSpaces/Version
5	284792 bytes	EncryptedPackage
6	224 bytes	EncryptionInfo

Intelligence

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File Origin

# of uploads :

2

# of downloads :

302

Origin country :

n/a

Vendor Threat Intelligence

ANY.RUN nanocore

Malware family:

nanocore

Alert

Create hunting rule

ID:

1

File name:

rooming.xlsx

Verdict:

Malicious activity

Analysis date:

2022-07-11 16:36:06 UTC

Tags:

encrypted opendir exploit CVE-2017-11882 loader trojan nanocore rat

Link:

https://app.any.run/tasks/b037aef0-a13a-43a7-b1c2-f7a9638f8a1c

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

CAPE Sandbox

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/286315/

ClamAV Detected

Detection(s):

PUA.Doc.Packed.EncryptedDoc-6563700-0

Alert

Create hunting rule

Dr. Web vxCube Malware

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Sending a custom TCP request

Creating a window

Сreating synchronization primitives

Searching for synchronization primitives

Launching a process

Sending an HTTP GET request to an infection source by exploiting the app vulnerability

DocGuard Malicious

Result

Verdict:

Malicious

File Type:

OOXML Excel File with Embedding Objects in Encrypted Excel File

Link:

https://app.docguard.net/1139f4239fd43f2eb79f6858e5522a2df4d7b45f7103039c95f7fb49aae16291/results/dashboard

Document image

Image:

Download PNG

FileScan.IO Malicious

Verdict:

Malicious

Threat level:

  10/10

Confidence:

100%

Tags:

embedequation exploit packed shellcode VelvetSweatshop

Link:

https://www.filescan.io/uploads/62cc33cf22051a09ca71d134/reports/899100b3-eeb3-4204-a54a-2ae6415bd89c/overview

inlyse Malware.AI Malicious

Label:

Malicious

Suspicious Score:

5.6/10

Score Malicious:

57%

Score Benign:

43%

Link:

https://www.malware.ai/gui/files/?id=054802f9-5958-43e9-9314-0e0719496a84

InQuest MALICIOUS

Result

Verdict:

MALICIOUS

Link:

https://labs.inquest.net/dfi/sha256/1139f4239fd43f2eb79f6858e5522a2df4d7b45f7103039c95f7fb49aae16291

Details

Document With No Content

Document contains little or no semantic information.

Joe Sandbox Nanocore

Result

Threat name:

Nanocore

Alert

Create hunting rule

Detection:

malicious

Classification:

troj.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1028698

Signature

.NET source code contains potential unpacker

Adds a directory exclusion to Windows Defender

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Detected Nanocore Rat

Drops PE files to the user root directory

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

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Office equation editor drops PE file

Office equation editor establishes network connection

Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)

Shellcode detected

Sigma detected: EQNEDT32.EXE connecting to internet

Sigma detected: File Dropped By EQNEDT32EXE

Sigma detected: NanoCore

Snort IDS alert for network traffic

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

Yara detected AntiVM3

Yara detected Generic Downloader

Yara detected Nanocore RAT

Behaviour

Behavior Graph:

Download SVG

CERT.PL MWDB

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/1139f4239fd43f2eb79f6858e5522a2df4d7b45f7103039c95f7fb49aae16291/

ReversingLabs TitaniumCloud Document-OLE.Exploit.CVE-2018-0798

Threat name:

Document-OLE.Exploit.CVE-2018-0798

Alert

Create hunting rule

Status:

Malicious

First seen:

2022-07-11 14:29:13 UTC

File Type:

Document

Extracted files:

70

AV detection:

15 of 26 (57.69%)

Threat level:

  5/5

Spamhaus Hash Blocklist Suspicious file

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=ce47ii472q7s5n47nbmokurkfx2npnc7oebqhhev675utkxbmkiq._file

Hatching Triage nanocore

Result

Malware family:

nanocore

Alert

Create hunting rule

Score:

  10/10

Tags:

family:nanocore evasion keylogger persistence spyware stealer suricata trojan

Link:

https://tria.ge/reports/220711-rtj29shher/

Behaviour

Checks processor information in registry

Creates scheduled task(s)

Enumerates system info in registry

Launches Equation Editor

Modifies Internet Explorer settings

Modifies registry class

Suspicious behavior: AddClipboardFormatListener

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

Drops file in System32 directory

Suspicious use of SetThreadContext

Adds Run key to start application

Checks whether UAC is enabled

Loads dropped DLL

Uses the VBS compiler for execution

Blocklisted process makes network request

Downloads MZ/PE file

Executes dropped EXE

NanoCore

suricata: ET MALWARE Possible NanoCore C2 60B

suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

Malware Config

C2 Extraction:

172.245.163.134:9036
machies.ddns.net:9036

VMRay NanoCore

Malware family:

NanoCore

Alert

Create hunting rule

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/1139f4239fd4/report/overview.html

VirusTotal

Please note that we are no longer able to provide a coverage score for Virus Total.

YOROI YOMI Malicious File

Threat name:

Malicious File

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/1139f4239fd43f2eb79f6858e5522a2df4d7b45f7103039c95f7fb49aae16291

File information

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

Malspam

NanoCore

xlsx 1139f4239fd43f2eb79f6858e5522a2df4d7b45f7103039c95f7fb49aae16291

(this sample)

  

Delivery method

Distributed via e-mail attachment

Cape

https://www.capesandbox.com/analysis/286315/

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