MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a2b750b127b533b54c4525eecfeb98f20a9923ed0e39cafbc60280dae6faec6c. 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: 16

Intelligence 16 IOCs YARA 26 File information Comments

SHA256 hash:	a2b750b127b533b54c4525eecfeb98f20a9923ed0e39cafbc60280dae6faec6c
SHA3-384 hash:	74c4393ec8bfa753cbf717b0c5cd0640139a58fe7addaf15a26e990f73c37ed5d3c77a8b4eec0e2c04814db58427c4c2
SHA1 hash:	5a37e53e9b9848a08b9d141969f1479d7358845d
MD5 hash:	4cc8305c3872eece74306734857cbe6c
humanhash:	timing-mirror-hawaii-alanine
File name:	bPaa.exe
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	238'080 bytes
First seen:	2023-08-20 18:50:30 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	bc4f8e98d1041d53dd63bfb91ed10d0a (52 x RemcosRAT)
ssdeep	6144:avGSN9gWuLpcBKnVBYAsmrzpyDfOXXV1BYj:avbGWulcBKV3uOXKj
Threatray	2'477 similar samples on MalwareBazaar
TLSH	T1863412986B6ED86AD1D5C6FC8520D5F222E95C7D0D2665CE1BC8FE2FFD27200E8910A1
TrID	54.9% (.EXE) UPX compressed Win32 Executable (27066/9/6) 13.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 10.2% (.EXE) Win16 NE executable (generic) (5038/12/1) 9.1% (.EXE) Win32 Executable (generic) (4505/5/1) 4.1% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):
dhash icon	c4d48eaa8ad4d4f8 (1'212 x RemcosRAT, 1 x Worm.Ramnit, 1 x Vjw0rm)
Reporter	pmelson
Tags:	exe remcos RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

347

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

bPaa.exe

Verdict:

Malicious activity

Analysis date:

2023-08-20 18:52:23 UTC

Tags:

rat remcos remote stealer keylogger

Link:

https://app.any.run/tasks/2dfe1fda-9c17-485c-ba93-b6a6a140ad68

Note:

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

Detection:

Remcos

Link:

https://www.capesandbox.com/analysis/443840/

Detection(s):

Win.Trojan.Remcos-9841897-0

Win.Trojan.Remcos-10002580-0

Result

Verdict:

Malware

Maliciousness:

Behaviour

Сreating synchronization primitives

Setting a keyboard event handler

DNS request

Sending a custom TCP request

Sending an HTTP GET request

Creating a file

Unauthorized injection to a recently created process

Restart of the analyzed sample

Reading critical registry keys

Creating a file in the %temp% directory

Stealing user critical data

Gathering data

Verdict:

Malicious

Labled as:

Dacic.A9349469.A.Generic

Link:

https://www.hybrid-analysis.com/sample/a2b750b127b533b54c4525eecfeb98f20a9923ed0e39cafbc60280dae6faec6c

Malware family:

REMCOS

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/aa0872bb-ec13-437f-9e34-88bedcc860b1

Result

Threat name:

Remcos

Detection:

malicious

Classification:

rans.phis.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1294154

Signature

Antivirus / Scanner detection for submitted sample

C2 URLs / IPs found in malware configuration

Contains functionality to bypass UAC (CMSTPLUA)

Contains functionality to inject code into remote processes

Contains functionality to modify clipboard data

Contains functionality to register a low level keyboard hook

Contains functionality to steal Chrome passwords or cookies

Contains functionality to steal Firefox passwords or cookies

Contains functionalty to change the wallpaper

Delayed program exit found

Found malware configuration

Installs a global keyboard hook

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Maps a DLL or memory area into another process

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for submitted file

Sample uses process hollowing technique

Sigma detected: Remcos

Tries to harvest and steal browser information (history, passwords, etc)

Tries to steal Instant Messenger accounts or passwords

Tries to steal Mail credentials (via file / registry access)

Uses dynamic DNS services

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Yara detected WebBrowserPassView password recovery tool

Behaviour

Behavior Graph:

Download SVG

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/a2b750b127b533b54c4525eecfeb98f20a9923ed0e39cafbc60280dae6faec6c/

Threat name:

Win32.Backdoor.Remcos

Status:

Malicious

First seen:

2023-08-20 18:51:08 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

23 of 24 (95.83%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=uk3vbmjhwuz3ktcfexxm724y6ifjsi7nby44v66gakanvzx25rwa._file

Verdict:

malicious

Label(s):

remcos

RemcosRAT

267694c503c2edc13ad28b38f4d37063fa678db1f2bf4c1acbfed01ad8f43e4d

RemcosRAT

6a5a9f5c3587c3e3cca2b8154f80137ac89ddd1bf9a3ebd3856fb1cc327553ee

RemcosRAT

73d386ff784ebd8adfb9fe2cede484e4662ef4a36e45421164046123938f252f

RemcosRAT

a47de008d965b4432d1ac9b422db6b30adea67d6a10e1957cfd10bd4428927ab

RemcosRAT

a62b6ff9f536f6725a6235b206861f26c6fcf19dd08ed8286dcf90f6d224f3f8

RemcosRAT

c322d551fe9fbd816dbfcdb273ead2c91045982721dd8cf540b51394dfee62c1

RemcosRAT

f9757e655b46d179dfadee752d8d147d1ef2add907a8712755dffc158667b1e4

RemcosRAT

+ 2'467 additional samples on MalwareBazaar

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:wytaugust rat spyware stealer upx

Link:

https://tria.ge/reports/230820-xhgqnaae4z/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

Reads user/profile data of web browsers

UPX packed file

NirSoft MailPassView

NirSoft WebBrowserPassView

Nirsoft

Remcos

Malware Config

C2 Extraction:

exbanebiec.duckdns.org:9596

Unpacked files

SH256 hash:

777924535187ad5ba0318a3b0ea4e2ff1a6e6c1526574f5c50bc05d55dedafef

MD5 hash:

db99a2cf74fbc699dba0bcfccf1615e4

SHA1 hash:

7d3285123001fb49707e857c37295b487ee5d2e3

Detections:

Remcos

win_remcos_auto

Link:

https://www.unpac.me/results/de4782ca-dcd8-47fb-a8c6-9279a5b5771b/

SH256 hash:

a2b750b127b533b54c4525eecfeb98f20a9923ed0e39cafbc60280dae6faec6c

MD5 hash:

4cc8305c3872eece74306734857cbe6c

SHA1 hash:

5a37e53e9b9848a08b9d141969f1479d7358845d

Link:

https://www.unpac.me/results/de4782ca-dcd8-47fb-a8c6-9279a5b5771b/

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/a2b750b127b5/report/overview.html

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/a2b750b127b533b54c4525eecfeb98f20a9923ed0e39cafbc60280dae6faec6c

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:	BLOWFISH_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for Blowfish constants

Rule name:	DebuggerCheck__API Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	iexplorer_remcos Create hunting rule
Author:	iam-py-test
Description:	Detect iexplorer being taken over by Remcos

Rule name:	INDICATOR_EXE_Packed_MPress Create hunting rule
Author:	ditekSHen
Description:	Detects executables built or packed with MPress PE compressor

Rule name:	INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store Create hunting rule
Author:	ditekSHen
Description:	Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

Rule name:	INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients Create hunting rule
Author:	ditekSHen
Description:	Detects executables referencing many email and collaboration clients. Observed in information stealers

Rule name:	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM Create hunting rule
Author:	ditekSHen
Description:	Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

Rule name:	maldoc_find_kernel32_base_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	maldoc_getEIP_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	MD5_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for MD5 constants

Rule name:	meth_get_eip Create hunting rule
Author:	Willi Ballenthin

Rule name:	meth_stackstrings Create hunting rule
Author:	Willi Ballenthin

Rule name:	NET Create hunting rule
Author:	malware-lu

Rule name:	QbotStuff Create hunting rule
Author:	anonymous

Rule name:	Remcos Create hunting rule
Author:	kevoreilly
Description:	Remcos Payload

Rule name:	REMCOS_RAT_variants Create hunting rule

Rule name:	RIPEMD160_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for RIPEMD-160 constants

Rule name:	SHA1_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA1 constants

Rule name:	TeslaCryptPackedMalware Create hunting rule

Rule name:	ThreadControl__Context Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	UPXV200V290MarkusOberhumerLaszloMolnarJohnReiser Create hunting rule
Author:	malware-lu

Rule name:	UPXv20MarkusLaszloReiser Create hunting rule
Author:	malware-lu

Rule name:	upx_3 Create hunting rule
Author:	Kevin Falcoz
Description:	UPX 3.X

Rule name:	Windows_Trojan_Remcos_b296e965 Create hunting rule
Author:	Elastic Security

Rule name:	win_remcos_auto Create hunting rule
Author:	Felix Bilstein - yara-signator at cocacoding dot com
Description:	Detects win.remcos.

Rule name:	yara_template Create hunting rule

File information

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

Web download

RemcosRAT

exe a2b750b127b533b54c4525eecfeb98f20a9923ed0e39cafbc60280dae6faec6c

(this sample)

Link

https://www.virustotal.com/gui/file/a2b750b127b533b54c4525eecfeb98f20a9923ed0e39cafbc60280dae6faec6c/detection

Delivery method

Distributed via web download

Cape

https://www.capesandbox.com/analysis/443840/

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