MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 08f99aa27cbedd18401cfae07c7dd2e79966c6f63777fb95bc7a73c5cad5a537. 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 17 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 08f99aa27cbedd18401cfae07c7dd2e79966c6f63777fb95bc7a73c5cad5a537
SHA3-384 hash: d98b815ea22a92874f2f1993e1c0398eb6b05daa3219e0bb7eac349b774ca5da3c96a31aecd1d659841139063f2af405
SHA1 hash: 3f22da0d8a6d67efbe8c075bf72ee7111d4d022e
MD5 hash: cef984ffee5314e72aee4366945e20a5
humanhash: solar-king-triple-yellow
File name:cef984ffee5314e72aee4366945e20a5.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:407'552 bytes
First seen:2023-07-31 07:14:39 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 6144:apHUD2j+MstopKx16TITMEiI9WNIMn2hPSmtxgk2JKLvIs08pA5WHy4cDkStKhiI:oPeVx1iITcg+Sxp24vXbqQS4IjsMI
Threatray 2'334 similar samples on MalwareBazaar
TLSH T11E8401EDB2A072EFC82BC57A9EE85DB8E965B8F607170147A02755DCEA0D463CF140B1
TrID 28.5% (.EXE) Win64 Executable (generic) (10523/12/4)
17.8% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
13.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
12.2% (.EXE) Win32 Executable (generic) (4505/5/1)
5.6% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Reporter abuse_ch
Tags:exe RAT RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
288
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Zamowienie.xls
Verdict:
Malicious activity
Analysis date:
2023-07-31 06:48:43 UTC
Tags:
opendir exploit cve-2017-11882 loader
Link:
https://app.any.run/tasks/511ab726-ef46-4ad4-be3d-2a6c78aaf51e

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/439329/
Detection(s):
PUA.Win.Packed.ConfuserEx-6391397-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Launching a process
Creating a file
Сreating synchronization primitives
DNS request
Sending an HTTP GET request
Reading critical registry keys
Creating a file in the %temp% directory
Query of malicious DNS domain
Sending a TCP request to an infection source
Forced shutdown of a system process
Stealing user critical data
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
confuserex packed packed
Link:
https://www.filescan.io/uploads/64c75f77a108b876ac847922/reports/648d3420-c31b-4115-90c4-5d43d8519fab/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/08f99aa27cbedd18401cfae07c7dd2e79966c6f63777fb95bc7a73c5cad5a537
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/beef16ad-2b56-4978-aa07-b0ef9d1801aa
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1282965
Signature
Allocates memory in foreign processes
Antivirus detection for URL or domain
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 steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Delayed program exit found
Found malware configuration
Injects a PE file into a foreign processes
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 submitted file
PE file has nameless sections
Performs DNS queries to domains with low reputation
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)
Writes to foreign memory regions
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1282965 Sample: sGW3ztsYSv.exe Startdate: 31/07/2023 Architecture: WINDOWS Score: 100 33 Found malware configuration 2->33 35 Malicious sample detected (through community Yara rule) 2->35 37 Antivirus detection for URL or domain 2->37 39 8 other signatures 2->39 7 sGW3ztsYSv.exe 1 2->7         started        process3 file4 25 C:\Users\user\AppData\...\sGW3ztsYSv.exe.log, CSV 7->25 dropped 41 Writes to foreign memory regions 7->41 43 Allocates memory in foreign processes 7->43 45 Injects a PE file into a foreign processes 7->45 11 CasPol.exe 3 14 7->11         started        signatures5 process6 dnsIp7 29 top.noforabusers1.xyz 45.81.39.190, 30890, 49714, 49715 LVLT-10753US United States 11->29 31 geoplugin.net 178.237.33.50, 49716, 80 ATOM86-ASATOM86NL Netherlands 11->31 47 Contains functionality to bypass UAC (CMSTPLUA) 11->47 49 Performs DNS queries to domains with low reputation 11->49 51 Contains functionality to steal Chrome passwords or cookies 11->51 53 5 other signatures 11->53 15 CasPol.exe 1 11->15         started        18 CasPol.exe 1 11->18         started        20 CasPol.exe 1 11->20         started        22 9 other processes 11->22 signatures8 process9 dnsIp10 55 Tries to steal Instant Messenger accounts or passwords 15->55 57 Tries to steal Mail credentials (via file / registry access) 15->57 27 192.168.2.1 unknown unknown 22->27 59 Tries to harvest and steal browser information (history, passwords, etc) 22->59 signatures11
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/08f99aa27cbedd18401cfae07c7dd2e79966c6f63777fb95bc7a73c5cad5a537/
Threat name:
Win32.Trojan.Casdet
Create hunting rule
Status:
Malicious
First seen:
2023-07-31 07:15:05 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
20 of 24 (83.33%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=bd4zvit4x3orqqa47lqhy7os46mwnrxwg537xfn4pjz4lswvuu3q._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
0e25b5299c3df59e05d296b1478d43094d5d81e1a5b8706fd355b36388244326
RemcosRAT
1c9708a7c1cca2ffb1fb6711828553521a81c313bd3dcefba441e546d2457e5d
RemcosRAT
29cbb0d27bbc787365e8c2aa11205b0218a178eda781bca644f8c77e55ad03c7
RemcosRAT
40495077a292c313a58d5d42004097acf6372f0ab3f7e20c14872e7623edf6a2
RemcosRAT
55b379ec8cd752f104605bdbd88048c1c3b49c328b393ba496494a118ef5ae16
RemcosRAT
67c7c5ec03b9334d1a132f2b0fd7ddc99515ccdb2372aa3b16463ea34d09f060
RemcosRAT
df906c77d802e4e977ff24b11e1840d6948338250023a27b2b30ad9ac6e3f4ba
RemcosRAT
e970fdbbcd35127388ad909820df33fbe5d0a7bd4b52ccde011c5782edfe03fc
RemcosRAT
f60667b9e2a0a25221cdb47844149beb3b1cd08abbc3360e8684fad9d8aaa20e
RemcosRAT
f82c643baf10986a8ad197d2565b7a093aa1eef8b9d4463f4a42d3cc81a45b8f
RemcosRAT
+ 2'324 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost collection rat
Link:
https://tria.ge/reports/230731-h28adsdb93/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Drops file in System32 directory
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
NirSoft MailPassView
NirSoft WebBrowserPassView
Nirsoft
Remcos
Malware Config
C2 Extraction:
top.noforabusers1.xyz:30890
Unpacked files
SH256 hash:
f8fdc0c6ce42aed3a2a46809d9a458d0c22a88757df1c2fabca6f75704874cdc
MD5 hash:
897ea2bcfcc78408e4beea68b3be622a
SHA1 hash:
d1d73205372f82f286461797c707ead6468be94a
Link:
https://www.unpac.me/results/fe0582be-090c-4a17-b06d-529e682391eb/
SH256 hash:
39764addf9eb39b14ff66ffcce81fc569f0852309b9e085ac6834dcb37834424
MD5 hash:
dea2c72cc06b5ee2ca965f650681fae8
SHA1 hash:
82f056a82ee101b7260961c8a1c5f57bfa1b5c37
Detections:
Remcos
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/fe0582be-090c-4a17-b06d-529e682391eb/
Parent samples :
28abe1ccfbf25ef3b2b15eb036c2c75116f8c32278f8796ef828406e2639a0f7
30677a0487ca9917350dfd860dc7ff317e37e0b8d937bb4d4ec20d8afc276eb3
23f9cab9765f1e0d17ecedd1f7485750d74c66659e0b9bc8560b5d5945509008
c68b7153fdf0f50387d3d594f00b361d3b03b0c1efa12ff741a11313b92ff9c0
08f99aa27cbedd18401cfae07c7dd2e79966c6f63777fb95bc7a73c5cad5a537
SH256 hash:
08f99aa27cbedd18401cfae07c7dd2e79966c6f63777fb95bc7a73c5cad5a537
MD5 hash:
cef984ffee5314e72aee4366945e20a5
SHA1 hash:
3f22da0d8a6d67efbe8c075bf72ee7111d4d022e
Link:
https://www.unpac.me/results/fe0582be-090c-4a17-b06d-529e682391eb/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/08f99aa27cbe/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

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:iexplorer_remcos
Create hunting rule
Author:iam-py-test
Description:Detect iexplorer being taken over by Remcos
Rule name:INDICATOR_EXE_Packed_ConfuserEx
Create hunting rule
Author:ditekSHen
Description:Detects executables packed with ConfuserEx Mod
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:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:pe_imphash
Create hunting rule
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:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:TeslaCryptPackedMalware
Create hunting rule
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

Executable exe 08f99aa27cbedd18401cfae07c7dd2e79966c6f63777fb95bc7a73c5cad5a537

(this sample)

Cape
Cape
https://www.capesandbox.com/analysis/439329/
  
URLhaus
https://urlhaus.abuse.ch/url/2693411/
  
Delivery method
Distributed via web download

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