MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2c85738faf54a7e87518c8b842cb632c1c2a8ceb80c209cbab3a9e552e05527d. 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

CrimsonRAT

Vendor detections: 6

Intelligence 6 IOCs YARA 1 File information Comments

SHA256 hash:	2c85738faf54a7e87518c8b842cb632c1c2a8ceb80c209cbab3a9e552e05527d
SHA3-384 hash:	9d73d84fbf19464fd0cbc1ca5735ed2b2cdd9ac74b7202fcbeb2dbbb45302076b8e0d64904ada60b686b1a7ae79650b4
SHA1 hash:	42dd9f2e5b97a9389e5aab3a7c44771fe25e7657
MD5 hash:	5ef8659d83c6b936d3e72235620712b6
humanhash:	triple-tennessee-speaker-hot
File name:	PO009844132.xlsm
Download:	download sample
Signature	CrimsonRAT Create hunting rule
File size:	45'532 bytes
First seen:	2020-08-27 05:31:56 UTC
Last seen:	2020-08-27 07:19:30 UTC
File type:	xlsm
MIME type:	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
ssdeep	768:aIxmxBkFuZ3YHfgj9LdJKxKsr+APEchuf5P5XhzzSJzlOk3YIbZ7EdDOT:aI0x2dG5UKsrn6Bx32lOaZlAq
TLSH	CC13F17B2E4F467AE46A137D580CEB2A7089C603DE18548E6D215B7944A3FF0CA179CF
Reporter	abuse_ch
Tags:	CrimsonRAT nVp RAT xlsm

abuse_ch

Malspam distributing CrimsonRAT:

HELO: mail.novatronica.com
Sending IP: 195.22.29.130
From: Diane Walker <rmiskoff@ewrzone.com>
Subject: PO009844132
Attachment: PO009844132.xlsm

CrimsonRAT C2:
185.140.53.221:3489

Hosted on 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-EU3
country: EU
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: 2020-07-28T20:56:03Z
source: RIPE

Intelligence

File Origin

# of uploads :

# of downloads :

1'698

Origin country :

n/a

Vendor Threat Intelligence

Detection(s):

SecuriteInfo.com.Heur.Macro.Generic.h.9ca3f8b5.27048.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

DNS request

Creating a file

Sending an HTTP GET request

Sending a TCP request to an infection source

Creating a process from a recently created file

Result

Threat name:

Oski

Detection:

malicious

Classification:

troj.expl

Score:

96 / 100

Link:

https://www.joesandbox.com/analysis/452231

Signature

Document exploit detected (creates forbidden files)

Document exploit detected (drops PE files)

Document exploit detected (process start blacklist hit)

Drops PE files to the user root directory

Machine Learning detection for sample

Office process drops PE file

Sigma detected: Executables Started in Suspicious Folder

Sigma detected: Execution in Non-Executable Folder

Sigma detected: MS Office Product Spawning Exe in User Dir

Sigma detected: Suspicious Program Location Process Starts

Yara detected Oski Stealer

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/2c85738faf54a7e87518c8b842cb632c1c2a8ceb80c209cbab3a9e552e05527d/

Threat name:

Win32.Dropper.Generic

Status:

Suspicious

First seen:

2020-08-27 05:33:05 UTC

AV detection:

2 of 48 (4.17%)

Threat level:

3/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=fscxhd5pkst6q5iyzc4efs3dfqocvdhlqdbats5lhkpfklqfkj6q._file

Result

Malware family:

n/a

Score:

8/10

Tags:

n/a

Link:

https://tria.ge/reports/200827-fnr9t3awqj/

Behaviour

Suspicious behavior: AddClipboardFormatListener

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Checks processor information in registry

Enumerates system info in registry

Suspicious behavior: AddClipboardFormatListener

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Office loads VBA resources, possible macro or embedded object present

Executes dropped EXE

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/2c85738faf54a7e87518c8b842cb632c1c2a8ceb80c209cbab3a9e552e05527d

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.