MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 57dbdb1e3f76ff7ac2743d2bf5d92a2b13754e07b4cf1c4e1ea12b909b737670. 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

RemcosRAT

Vendor detections: 13

Maldoc score: 4

Intelligence 13 IOCs YARA 3 File information Comments

SHA256 hash:	57dbdb1e3f76ff7ac2743d2bf5d92a2b13754e07b4cf1c4e1ea12b909b737670
SHA3-384 hash:	848c245cbd9d9162b668cbc18df4e986012ffc6c4e538deeb50586080a32bc790fe4508373a362ca7cb6a1cccff0b488
SHA1 hash:	bbfa82631ded9e9eb9dc33e2c86f7af7cb4efd36
MD5 hash:	98dd77e81627249fbf2fd4d0488a9fa0
humanhash:	maryland-mississippi-apart-vegan
File name:	ΕΡΕΥΝΑ.xls
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	1'094'656 bytes
First seen:	2025-02-11 17:27:09 UTC
Last seen:	2025-02-11 18:44:26 UTC
File type:	xls
MIME type:	application/vnd.ms-excel
ssdeep	24576:f5D5iSCssEWQAeexN3/ThRc2xn6F86oXru3xH4LqQPiWFtU+pto:x8SCssETON3rhRvxSCuBHWZFNp
TLSH	T1CC352301FB81DB03CA41853E5ECB659F162CFD483B99829776E0377E2739AB5949B08C
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)
Magika	xls
Reporter	abuse_ch
Tags:	cve-2017-0199 RAT RemcosRAT xls

Office OLE Information

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

OLE id

Maldoc score: 4

OLE dump

MalwareBazaar was able to identify 15 sections in this file using oledump:

Section ID	Section size	Section name
1	114 bytes	CompObj
2	244 bytes	DocumentSummaryInformation
3	200 bytes	SummaryInformation
4	99 bytes	MBD00143BFA/CompObj
5	591760 bytes	MBD00143BFA/Package
6	430 bytes	MBD00143BFB/Ole
7	479763 bytes	Workbook
8	521 bytes	_VBA_PROJECT_CUR/PROJECT
9	104 bytes	_VBA_PROJECT_CUR/PROJECTwm
10	977 bytes	_VBA_PROJECT_CUR/VBA/Sheet1
11	977 bytes	_VBA_PROJECT_CUR/VBA/Sheet2
12	977 bytes	_VBA_PROJECT_CUR/VBA/Sheet3
13	985 bytes	_VBA_PROJECT_CUR/VBA/ThisWorkbook
14	2644 bytes	_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
15	553 bytes	_VBA_PROJECT_CUR/VBA/dir

OLE vba

MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:

Type	Keyword	Description
Suspicious	Hex Strings	Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin

# of uploads :

# of downloads :

498

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

Anchetă.xls

Verdict:

No threats detected

Analysis date:

2025-02-11 11:26:12 UTC

Tags:

n/a

Link:

https://app.any.run/tasks/145cdb8a-0557-40eb-bd23-a491f728071a

Note:

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

Detection(s):

SecuriteInfo.com.Other.Malware-gen.4138.30048.UNOFFICIAL

TwinWave.EvilDoc.93TilInfinity.20240412.UNOFFICIAL

Verdict:

Malicious

Score:

90.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=67ab487249f32dfb0d82fa22

Tags:

office macro micro

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

DNS request

Searching for the window

Sending an HTTP GET request

Сreating synchronization primitives

Using the Windows Management Instrumentation requests

Connection attempt by exploiting the app vulnerability

Sending a custom TCP request by exploiting the app vulnerability

Result

Verdict:

Malicious

File Type:

Legacy Excel File with Macro

Link:

https://app.docguard.net/57dbdb1e3f76ff7ac2743d2bf5d92a2b13754e07b4cf1c4e1ea12b909b737670/results/dashboard

Payload URLs

URL

File name

https://linkrjb.me/KftdQ5

Embedded Ole

Behaviour

SuspiciousRTF detected

Verdict:

Malicious

Labled as:

CVE-2017-0199

Link:

https://www.hybrid-analysis.com/sample/57dbdb1e3f76ff7ac2743d2bf5d92a2b13754e07b4cf1c4e1ea12b909b737670

Label:

Benign

Suspicious Score:

2.1/10

Score Malicious:

22%

Score Benign:

78%

Link:

https://www.malware.ai/gui/files/?id=250dcf74-19ae-47b4-8fa9-32fc3f4799d1

Result

Threat name:

n/a

Detection:

malicious

Classification:

expl

Score:

64 / 100

Link:

https://www.joesandbox.com/analysis/1612344

Signature

Document exploit detected (process start blacklist hit)

Excel sheet contains many unusual embedded objects

Machine Learning detection for sample

Multi AV Scanner detection for submitted file

Sigma detected: Suspicious Microsoft Office Child Process

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

OFFICE

Link:

https://malprob.io/report/57dbdb1e3f76ff7ac2743d2bf5d92a2b13754e07b4cf1c4e1ea12b909b737670

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/57dbdb1e3f76ff7ac2743d2bf5d92a2b13754e07b4cf1c4e1ea12b909b737670/

Threat name:

Document-Office.Exploit.CVE-2017-0199

Status:

Malicious

First seen:

2025-02-11 11:30:57 UTC

File Type:

Document

Extracted files:

AV detection:

12 of 24 (50.00%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=k7n5whr7o37xvqtuhuv7lwjkfmjxktqhwthrytq6uevzbg3tozya._file

Result

Malware family:

n/a

Score:

10/10

Tags:

defense_evasion discovery execution

Link:

https://tria.ge/reports/250211-v1mnhsvjgx/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Modifies Internet Explorer settings

Suspicious behavior: AddClipboardFormatListener

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Uses Volume Shadow Copy WMI provider

Uses Volume Shadow Copy service COM API

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Drops file in System32 directory

Command and Scripting Interpreter: PowerShell

Blocklisted process makes network request

Evasion via Device Credential Deployment

Process spawned unexpected child process

Malware Family:

n/a

Verdict:

Malicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/da9f73ce-bc31-44dd-9eb3-be53c955d96f

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

Threat name:

Malicious File

Score:

0.76

Link:

https://yomi.yoroi.company/submissions/57dbdb1e3f76ff7ac2743d2bf5d92a2b13754e07b4cf1c4e1ea12b909b737670

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:	informational_win_ole_protected Create hunting rule
Author:	Jeff White (karttoon@gmail.com) @noottrak
Description:	Identify OLE Project protection within documents.

Rule name:	Sus_Obf_Enc_Spoof_Hide_PE Create hunting rule
Author:	XiAnzheng
Description:	Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

Rule name:	XLS_STRINGS Create hunting rule
Author:	somedieyoungZZ
Description:	Detect Strings targeting Bangladesh

File information

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

No further information available

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