MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 88c300243b5102cdcf2685203b2469f384d12d0cbd66b49dd479d21b3ceab24d. 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 29 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 88c300243b5102cdcf2685203b2469f384d12d0cbd66b49dd479d21b3ceab24d
SHA3-384 hash: d03f40fd4a3b1a2243f39adc7ccd8bf703b6854a62706d6fe4ec5e39c143291e2abb59c76c8f670fb4217b90efa01ac1
SHA1 hash: de9347f1e2c4fce9f8c95f765d2fd88239c38778
MD5 hash: ec846f5c55ce1a4d76b3bd1610665e0b
humanhash: skylark-sixteen-massachusetts-fourteen
File name:ec846f5c55ce1a4d76b3bd1610665e0b
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:932'352 bytes
First seen:2023-12-08 09:22:21 UTC
Last seen:2023-12-08 11:24:39 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:thkZ5FGhQEsqstMn/tVjmLUfC3IlhxU+rTm/6O+x8wHn2iHcD:tK/gGtMVVjmLUfGEJ+/sywHf8
TLSH T11415232135DD6352C5E4AFF8456B8408473FB6070A35D60D2CC690DE2B76B86AEB236F
TrID 63.0% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
11.2% (.SCR) Windows screen saver (13097/50/3)
9.0% (.EXE) Win64 Executable (generic) (10523/12/4)
5.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
3.8% (.EXE) Win32 Executable (generic) (4505/5/1)
Reporter zbetcheckin
Tags:32 exe RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
328
Origin country :
FR FR
Vendor Threat Intelligence
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/463515/
Detection(s):
Porcupine.Malware.58887.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Сreating synchronization primitives
Creating a process with a hidden window
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a file in the %temp% directory
Launching a process
Creating a file
DNS request
Sending an HTTP GET request
Forced shutdown of a system process
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/6572e07a3636548f3742a96d/reports/ac6f3423-c25f-42e6-9814-2c16e83fe835/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/88c300243b5102cdcf2685203b2469f384d12d0cbd66b49dd479d21b3ceab24d
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/37dbed6d-ef7c-47e8-8a47-9fd63e43708d
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1356079
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Scheduled temp file as task from temp location
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1356079 Sample: nkv2w8YXBr.exe Startdate: 08/12/2023 Architecture: WINDOWS Score: 100 41 Malicious sample detected (through community Yara rule) 2->41 43 Antivirus detection for URL or domain 2->43 45 Antivirus / Scanner detection for submitted sample 2->45 47 8 other signatures 2->47 7 nkv2w8YXBr.exe 7 2->7         started        11 BsclGG.exe 5 2->11         started        process3 file4 37 C:\Users\user\AppData\Roaming\BsclGG.exe, PE32 7->37 dropped 39 C:\Users\user\AppData\Local\...\tmpFB62.tmp, XML 7->39 dropped 49 Uses schtasks.exe or at.exe to add and modify task schedules 7->49 51 Adds a directory exclusion to Windows Defender 7->51 13 powershell.exe 23 7->13         started        15 powershell.exe 23 7->15         started        17 schtasks.exe 1 7->17         started        25 5 other processes 7->25 53 Antivirus detection for dropped file 11->53 55 Multi AV Scanner detection for dropped file 11->55 57 Machine Learning detection for dropped file 11->57 19 schtasks.exe 1 11->19         started        21 vbc.exe 11->21         started        23 vbc.exe 11->23         started        27 3 other processes 11->27 signatures5 process6 process7 29 conhost.exe 13->29         started        31 conhost.exe 15->31         started        33 conhost.exe 17->33         started        35 conhost.exe 19->35         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/88c300243b5102cdcf2685203b2469f384d12d0cbd66b49dd479d21b3ceab24d
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/88c300243b5102cdcf2685203b2469f384d12d0cbd66b49dd479d21b3ceab24d/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2023-12-07 16:56:10 UTC
File Type:
PE (.Net Exe)
Extracted files:
25
AV detection:
16 of 23 (69.57%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=rdbqajb3kebm3tzgquqdwjdj6ocnclimxvtljhouphjbwphkwjgq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:grace rat
Link:
https://tria.ge/reports/231208-lcf2dsbe8v/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Checks computer location settings
Uses the VBS compiler for execution
Remcos
Malware Config
C2 Extraction:
grantadistciaret.com:3212
Unpacked files
SH256 hash:
d01f3dea3851602ba5a0586c60430d286adf6fcc7e17aab080601a66630606e5
MD5 hash:
579197d4f760148a9482d1ebde113259
SHA1 hash:
cf6924eb360c7e5a117323bebcb6ee02d2aec86d
Link:
https://www.unpac.me/results/7b6f6b88-9d05-4607-898b-44a61c3101a6/
SH256 hash:
838e5000e114e29ebed5b65480a49b4438e51fa9987c6613149dd377252e272a
MD5 hash:
5120b64529a0108f59cddc8e4e3e1df8
SHA1 hash:
90acd7a847b2bbb928a8aa30423a0c314bd0f3e1
Link:
https://www.unpac.me/results/7b6f6b88-9d05-4607-898b-44a61c3101a6/
SH256 hash:
a17b490a2f400475a047483f23720035adf4d2e8e76940450ae26e9d41c82aeb
MD5 hash:
4413cbe5074b6e08ab9ca1e86e2dfec0
SHA1 hash:
73277e68969c5e91ea2dbd8ae5e155afe4536818
Link:
https://www.unpac.me/results/7b6f6b88-9d05-4607-898b-44a61c3101a6/
SH256 hash:
cf0bc44ce17f3691873b5d4b1048d2ee37966fed0d6f9aefe82a63d5e3a44381
MD5 hash:
4c9dcdd5946caffba47fd4218404d384
SHA1 hash:
4f733af9d4a0eef8aa55968c2971f5d6ae1f0f57
Detections:
Remcos
Create hunting rule
win_remcos_w0
Create hunting rule
win_remcos_auto
Create hunting rule
malware_windows_remcos_rat
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
win_remcos_rat_unpacked
Create hunting rule
Link:
https://www.unpac.me/results/7b6f6b88-9d05-4607-898b-44a61c3101a6/
Parent samples :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 hash:
88c300243b5102cdcf2685203b2469f384d12d0cbd66b49dd479d21b3ceab24d
MD5 hash:
ec846f5c55ce1a4d76b3bd1610665e0b
SHA1 hash:
de9347f1e2c4fce9f8c95f765d2fd88239c38778
Link:
https://www.unpac.me/results/7b6f6b88-9d05-4607-898b-44a61c3101a6/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/88c300243b51/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/88c300243b5102cdcf2685203b2469f384d12d0cbd66b49dd479d21b3ceab24d

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:AgentTesla_DIFF_Common_Strings_01
Create hunting rule
Author:schmidtsz
Description:Identify partial Agent Tesla strings
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: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_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: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: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:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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: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:win_remcos_w0
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:yarahub_win_remcos_rat_unpacked_aug_2023
Create hunting rule
Author:Matthew @ Embee_Research
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 88c300243b5102cdcf2685203b2469f384d12d0cbd66b49dd479d21b3ceab24d

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2738788/
Cape
Cape
https://www.capesandbox.com/analysis/463515/

Comments


Avatar
zbet commented on 2023-12-08 09:22:22 UTC

url : hxxp://172.245.142.51/340/wlanext.exe