MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a8c7f79f118f3ff57bef79b5877355adab4269c99a6c61dfca429a46ff0fb357. 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: 17


Intelligence 17 IOCs YARA 10 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a8c7f79f118f3ff57bef79b5877355adab4269c99a6c61dfca429a46ff0fb357
SHA3-384 hash: 057d5f0bd9f2243f2381d2e1917df2f2d5c62efec08bebc1475af0ca258c513d2dd77804720fdae84df8a4188f6610ae
SHA1 hash: 38359ac65f4df8cb0057fec6fe7a5e259c3446c8
MD5 hash: f79093c8b632acc16ca7f4a3b982d957
humanhash: georgia-glucose-alabama-equal
File name:x7qEy4NrEjee.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:494'592 bytes
First seen:2023-08-31 19:34:25 UTC
Last seen:2023-09-04 20:19:43 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 8d5087ff5de35c3fbb9f212b47d63cad (170 x RemcosRAT)
ssdeep 6144:Qu/TwNrjB5ikgxx+bdPoWYnRmCgEVAWK9goN1dFv/xpM9rsAOZZpAXNc7cbv:Qu7wNB5iedQ1RmPEVAWONjpcs/ZpQbv
TLSH T10BB49E01BAD2C072D97514300D36F776EABCBD202825497BB3D61D9BFE31190B62A6B7
TrID 32.2% (.EXE) Win64 Executable (generic) (10523/12/4)
20.1% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
15.4% (.EXE) Win16 NE executable (generic) (5038/12/1)
13.7% (.EXE) Win32 Executable (generic) (4505/5/1)
6.2% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon c4d48eaa8ad4d4f8 (1'000 x RemcosRAT, 1 x Worm.Ramnit, 1 x Vjw0rm)
Reporter pmelson
Tags:exe remcos RemcosRAT

Intelligence

File Origin
# of uploads :
7
# of downloads :
304
Origin country :
US US
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
x7qEy4NrEjee.exe
Verdict:
Malicious activity
Analysis date:
2023-08-31 19:37:29 UTC
Tags:
rat remcos remote keylogger
Link:
https://app.any.run/tasks/b9dd03b0-9fd0-4d3d-ae0b-9ad198170b0a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/445523/
Detection(s):
Win.Trojan.Remcos-9841897-0
Create hunting rule

Win.Trojan.Remcos-10002580-0
Create hunting rule

Result
Verdict:
Suspicious
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
Creating a window
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a process with a hidden window
Gathering data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control evasive exploit explorer fingerprint greyware keylogger lolbin phishing shell32
Link:
https://www.filescan.io/uploads/64f0eb695ec4a86232625da7/reports/bd3c5d08-6484-494c-afc6-a465c2b92259/overview
Verdict:
Malicious
Labled as:
Remcos.Generic
Link:
https://www.hybrid-analysis.com/sample/a8c7f79f118f3ff57bef79b5877355adab4269c99a6c61dfca429a46ff0fb357
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
REMCOS
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/591399aa-a31b-48bf-bc55-845a905965ec
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1301262
Signature
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Deletes itself after installation
Found malware configuration
Installs a global keyboard hook
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Sigma detected: Remcos
Uses dynamic DNS services
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a8c7f79f118f3ff57bef79b5877355adab4269c99a6c61dfca429a46ff0fb357/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2023-08-31 19:35:06 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
24 of 24 (100.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=vdd7phyrr477k67ppg2yo42vvwvue2ojtjwgdx6kiknen7ypwnlq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:sepg1
Link:
https://tria.ge/reports/230831-yandxahf8v/
Behaviour
Modifies registry class
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Checks computer location settings
Deletes itself
Malware Config
C2 Extraction:
xboxoner.duckdns.org:9520
Unpacked files
SH256 hash:
a8c7f79f118f3ff57bef79b5877355adab4269c99a6c61dfca429a46ff0fb357
MD5 hash:
f79093c8b632acc16ca7f4a3b982d957
SHA1 hash:
38359ac65f4df8cb0057fec6fe7a5e259c3446c8
Detections:
Remcos
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/d893804f-20de-44e3-89f0-38ab66478d97/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a8c7f79f118f/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/a8c7f79f118f3ff57bef79b5877355adab4269c99a6c61dfca429a46ff0fb357

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:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
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_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:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
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.

File information

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

Web download

RemcosRAT

Executable exe a8c7f79f118f3ff57bef79b5877355adab4269c99a6c61dfca429a46ff0fb357

(this sample)

  
Link
https://www.virustotal.com/gui/file/a8c7f79f118f3ff57bef79b5877355adab4269c99a6c61dfca429a46ff0fb357/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/445523/

Comments