MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4d79b33e220433112cc2b309be56a1fa511d59c376b19df936c5debbd14d4728. 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: 15


Intelligence 15 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4d79b33e220433112cc2b309be56a1fa511d59c376b19df936c5debbd14d4728
SHA3-384 hash: 513172964856cb45e41ef7fd4a1b511e07f3581a8c2441447869e62dd5c25649160e56b5df1cfad8eb6eaf7260a96619
SHA1 hash: 781ba96edda22e37fd5a36ded0f3d7c3cc12a92f
MD5 hash: 75840641905d0a05db8632c82f0f65e9
humanhash: rugby-uniform-lake-ink
File name:file
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:598'016 bytes
First seen:2023-01-13 13:51:11 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'599 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 12288:jNYhnGptebn2cX2aZxc5pxMP0W8tsHkXi7oQqykP/Ci/F:BYJ2obn262N5py05tsHkXhQs/N
Threatray 3'332 similar samples on MalwareBazaar
TLSH T1D5D4017423924DBECC68DD34F35EDE032AF1966AB549378E48B8039416B2196BFB1707
TrID 67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.7% (.EXE) Win64 Executable (generic) (10523/12/4)
6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.1% (.EXE) Win32 Executable (generic) (4505/5/1)
Reporter jstrosch
Tags:.NET exe MSIL RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
185
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
PaymentNotification.pdf.exe
Verdict:
Malicious activity
Analysis date:
2023-01-13 09:50:59 UTC
Tags:
rat remcos stealer
Link:
https://app.any.run/tasks/9faced7c-bf76-437f-8246-c215bbcd9f40

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/352598/
Detection(s):
SecuriteInfo.com.Malware.PDB-71.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Sending a custom TCP request
Launching a process
Creating a file
Сreating synchronization primitives
DNS request
Sending an HTTP GET request
Unauthorized injection to a system process
Enabling autorun by creating a file
Verdict:
No Threat
Threat level:
  2/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/63c16205d392ce333bdfa011/reports/5e2271c7-98bc-42bc-be88-3a49626faa45/overview
Result
Verdict:
UNKNOWN
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/8493ac18-3221-4cff-9e72-95066220c323
Result
Threat name:
Remcos, EICAR
Create hunting rule
Detection:
malicious
Classification:
spre.troj.adwa.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1151169
Signature
.NET source code references suspicious native API functions
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Drops PE files to the startup folder
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Powershell drops PE file
Sigma detected: Copy file to startup via Powershell
Sigma detected: Remcos
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected EICAR
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 783907 Sample: file.exe Startdate: 13/01/2023 Architecture: WINDOWS Score: 100 38 Multi AV Scanner detection for domain / URL 2->38 40 Malicious sample detected (through community Yara rule) 2->40 42 Antivirus detection for URL or domain 2->42 44 14 other signatures 2->44 7 file.exe 1 2->7         started        11 Sysjsjsjtem.exe 1 2->11         started        process3 file4 28 C:\Users\user\AppData\Local\...\file.exe.log, ASCII 7->28 dropped 46 Writes to foreign memory regions 7->46 48 Allocates memory in foreign processes 7->48 50 Injects a PE file into a foreign processes 7->50 13 powershell.exe 13 7->13         started        17 RegSvcs.exe 2 13 7->17         started        20 powershell.exe 3 11->20         started        22 RegSvcs.exe 11->22         started        signatures5 process6 dnsIp7 30 C:\Users\user\AppData\...\Sysjsjsjtem.exe, PE32 13->30 dropped 32 C:\Users\...\Sysjsjsjtem.exe:Zone.Identifier, ASCII 13->32 dropped 52 Drops PE files to the startup folder 13->52 54 Powershell drops PE file 13->54 24 conhost.exe 13->24         started        34 top.thekillforabuse1.xyz 195.178.120.12, 49695, 55988 HEXAGLOBE-ASFR unknown 17->34 36 geoplugin.net 178.237.33.50, 49696, 80 ATOM86-ASATOM86NL Netherlands 17->36 56 Performs DNS queries to domains with low reputation 17->56 26 conhost.exe 20->26         started        file8 signatures9 process10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4d79b33e220433112cc2b309be56a1fa511d59c376b19df936c5debbd14d4728/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2023-01-13 13:52:09 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
20 of 26 (76.92%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jv43gprcaqzrclgcwme34vvb7jir2wodo2yz36jwyxplxukni4ua._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
18a39f6193c69dae7ea38aa9dd25fddabdb651c4276e242d0b585bd13c49c3a9
RemcosRAT
2bff54b9373397bb78dc3dd57f37b85affb564edec73fbb265e9a14d313a2a1d
RemcosRAT
5f61b50531659487b56d97323a53c7c58445a62fb9f47489cd07b38feb3d4527
RemcosRAT
661c658fee6ad38a71803820b9eeb55f8cc9fb905117d55002d4da85696a26d2
RemcosRAT
6e52e90b821296bad26f5e889ab6b40bee7912017890cd8f380c0f6d1a89567a
RemcosRAT
a2cbf70ab3ebedd2c768816596fade8e94d1dd0d6025001ac59a71860e45b808
RemcosRAT
f7f8d1ebfed3afd13eb47392a7f502603ecb970a817c221682cd8f2a17ff2bb3
RemcosRAT
+ 3'322 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost rat
Link:
https://tria.ge/reports/230113-q6d64sda7y/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Drops startup file
Remcos
Malware Config
C2 Extraction:
top.thekillforabuse1.xyz:55988
Unpacked files
SH256 hash:
fd56a07f2da75c84337cbf94e0acafc09fb909cfb187a0ae214827ce2c4708bb
MD5 hash:
d93c5f59ddc41313bf36f106a2f1fe17
SHA1 hash:
97c5cd9d0689c1cd74685bc979122a13eba3fcc9
Link:
https://www.unpac.me/results/24490ad1-c6d4-4358-b680-dd70c20869ed/
SH256 hash:
90c3e8ede6444572f3ec0222563edd6f203e76b1e4084ed3a2ddc7f6d54230c0
MD5 hash:
c46e39921c8fbb5373f0f426b9324ece
SHA1 hash:
3f1018222cd7f2fb4a142574c351ac92ee2779aa
Detections:
Remcos
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/24490ad1-c6d4-4358-b680-dd70c20869ed/
SH256 hash:
4d79b33e220433112cc2b309be56a1fa511d59c376b19df936c5debbd14d4728
MD5 hash:
75840641905d0a05db8632c82f0f65e9
SHA1 hash:
781ba96edda22e37fd5a36ded0f3d7c3cc12a92f
Link:
https://www.unpac.me/results/24490ad1-c6d4-4358-b680-dd70c20869ed/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4d79b33e2204/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/4d79b33e220433112cc2b309be56a1fa511d59c376b19df936c5debbd14d4728

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_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:pdb_YARAify
Create hunting rule
Author:@wowabiy314
Description:PDB
Rule name:pe_imphash
Create hunting rule
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: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 4d79b33e220433112cc2b309be56a1fa511d59c376b19df936c5debbd14d4728

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/352598/

Comments