MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a6a3d95c04dca683d66b1e6dcf729a7ad0811c7bd7f9c19aa7076ba28f66fd0b. 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: 18


Intelligence 18 IOCs YARA 30 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a6a3d95c04dca683d66b1e6dcf729a7ad0811c7bd7f9c19aa7076ba28f66fd0b
SHA3-384 hash: cc448b1e4b9aaefb241fcc0792906de45e6807816fa28db9cb1f518a37f235d65c97a4c6cb097d2667dced6218fe5d5d
SHA1 hash: d6e7f91123520a3e74f3b7a6afe7fd480fa44211
MD5 hash: 8c9e994e6d019844f40d8f96d7a2d9ca
humanhash: louisiana-moon-fifteen-lamp
File name:FA98655890008000.bat
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:922'112 bytes
First seen:2024-02-15 11:02:05 UTC
Last seen:2024-02-19 08:42:08 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:obo/PngoSTrD1JBtg303rj3eLcPnijq8r/qBzoQExeRzA/LQgUpUCuGoyh:h/Png1J8E3/3Scb8r/olhpd
TLSH T10215E19D26110D62DBB3A775EA73CB020905EE774096A30B53D5947B622F3FF2BA0B11
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10523/12/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Reporter adrian__luca
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
297
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
a6a3d95c04dca683d66b1e6dcf729a7ad0811c7bd7f9c19aa7076ba28f66fd0b.exe
Verdict:
Malicious activity
Analysis date:
2024-02-15 12:02:21 UTC
Tags:
rat remcos stealer keylogger
Link:
https://app.any.run/tasks/7e132c12-8b76-4135-be8f-8da5306e429f

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/476300/
Detection(s):
Porcupine.Malware.58887.UNOFFICIAL
Create hunting rule

Win.Trojan.EmbeddedDotNetBinary-9940868-0
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Win.Trojan.EmbeddedReversedDLL-9940922-0
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Win.Trojan.Generic-10014419-0
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %AppData% directory
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Сreating synchronization primitives
Setting a keyboard event handler
DNS request
Connection attempt
Sending an HTTP GET request
Creating a file in the %AppData% subdirectories
Reading critical registry keys
Creating a file in the %temp% directory
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Connection attempt to an infection source
Sending a TCP request to an infection source
Stealing user critical data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
masquerade packed
Link:
https://www.filescan.io/uploads/65cdef6c90a5367ac0c6696b/reports/bc7eaf0b-6647-4ef9-a162-0a6181d888a6/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/a6a3d95c04dca683d66b1e6dcf729a7ad0811c7bd7f9c19aa7076ba28f66fd0b
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/c69b9537-54c4-4acb-8842-a062c2db357a
Result
Threat name:
PureLog Stealer, Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1392761
Signature
.NET source code contains potential unpacker
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 bypass UAC (CMSTPLUA)
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 dropped file
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 dropped file
Multi AV Scanner detection for submitted file
Snort IDS alert for network traffic
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
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)
Tries to steal Mail credentials (via file registry)
Yara detected Costura Assembly Loader
Yara detected PureLog Stealer
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1392761 Sample: FA98655890008000.bat.exe Startdate: 15/02/2024 Architecture: WINDOWS Score: 100 42 geoplugin.net 2->42 48 Snort IDS alert for network traffic 2->48 50 Multi AV Scanner detection for domain / URL 2->50 52 Found malware configuration 2->52 54 12 other signatures 2->54 8 FA98655890008000.bat.exe 1 3 2->8         started        12 Kfdclkoxie.exe 3 2->12         started        14 Kfdclkoxie.exe 2 2->14         started        signatures3 process4 file5 36 C:\Users\user\AppData\...\Kfdclkoxie.exe, PE32 8->36 dropped 56 Tries to steal Mail credentials (via file registry) 8->56 58 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 8->58 16 FA98655890008000.bat.exe 3 16 8->16         started        60 Antivirus detection for dropped file 12->60 62 Multi AV Scanner detection for dropped file 12->62 64 Contains functionality to bypass UAC (CMSTPLUA) 12->64 66 6 other signatures 12->66 21 Kfdclkoxie.exe 12->21         started        23 Kfdclkoxie.exe 14->23         started        signatures6 process7 dnsIp8 38 107.175.229.139, 49699, 49700, 8087 AS-COLOCROSSINGUS United States 16->38 40 geoplugin.net 178.237.33.50, 49701, 80 ATOM86-ASATOM86NL Netherlands 16->40 34 C:\Users\user\AppData\Roaming\aka\yes.png, data 16->34 dropped 44 Maps a DLL or memory area into another process 16->44 46 Installs a global keyboard hook 16->46 25 FA98655890008000.bat.exe 1 16->25         started        28 FA98655890008000.bat.exe 1 16->28         started        30 FA98655890008000.bat.exe 14 16->30         started        32 FA98655890008000.bat.exe 16->32         started        file9 signatures10 process11 signatures12 68 Tries to steal Instant Messenger accounts or passwords 25->68 70 Tries to harvest and steal browser information (history, passwords, etc) 25->70 72 Tries to steal Mail credentials (via file / registry access) 28->72
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a6a3d95c04dca683d66b1e6dcf729a7ad0811c7bd7f9c19aa7076ba28f66fd0b
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a6a3d95c04dca683d66b1e6dcf729a7ad0811c7bd7f9c19aa7076ba28f66fd0b/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2024-02-11 13:04:28 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
23 of 24 (95.83%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=u2r5sxae3stihvtldzw464u2pliichd32744dgvha5v2fd3g7ufq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Result
Malware family:
zgrat
Create hunting rule
Score:
  10/10
Tags:
family:remcos family:zgrat botnet:remotehost collection persistence rat spyware stealer
Link:
https://tria.ge/reports/240215-m5qa7sfd47/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Adds Run key to start application
Reads user/profile data of web browsers
NirSoft MailPassView
NirSoft WebBrowserPassView
Nirsoft
Detect ZGRat V1
Remcos
ZGRat
Malware Config
C2 Extraction:
107.175.229.139:8087
Unpacked files
SH256 hash:
002d3b3d58c63c8aac687b54a67f9334527339a3dfdd31da55c568db707b446b
MD5 hash:
139566d62414f07c4a53ed0cf862168b
SHA1 hash:
ae6b38f1569ae474591428bca1099e4180f02a03
Link:
https://www.unpac.me/results/6f1687c2-888a-4742-b732-a1d2329ce4c7/
SH256 hash:
6edc7cb5271655eb893ef15120eff10cc6cc139512a0c242f91b90fba27076af
MD5 hash:
fb706c71306d377d489c6f7f4e4e3232
SHA1 hash:
52864807a001f968c7d7ce929d70793bf86bc6aa
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
Link:
https://www.unpac.me/results/6f1687c2-888a-4742-b732-a1d2329ce4c7/
Parent samples :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 hash:
1406c4613eeea1bb2c00e07c9ae914ffcfb035a6a82f1b766b38fa6ee6dcdb61
MD5 hash:
16076960ff18aef69a1e2f37802f1548
SHA1 hash:
20b693bb8d20f8e3c95a50e75a95ed0f424111c6
Link:
https://www.unpac.me/results/6f1687c2-888a-4742-b732-a1d2329ce4c7/
SH256 hash:
407e25001a3c53cc7d5ecfd17a6cd8fefdecd5847a61be5dbad106c160c8c07c
MD5 hash:
b7ffeef838a8138491faf89747e49e9c
SHA1 hash:
14aaa9bc660bddfe63439a8a2abf2456b0324337
Link:
https://www.unpac.me/results/6f1687c2-888a-4742-b732-a1d2329ce4c7/
SH256 hash:
a6a3d95c04dca683d66b1e6dcf729a7ad0811c7bd7f9c19aa7076ba28f66fd0b
MD5 hash:
8c9e994e6d019844f40d8f96d7a2d9ca
SHA1 hash:
d6e7f91123520a3e74f3b7a6afe7fd480fa44211
Detections:
Typical_Malware_String_Transforms
Create hunting rule
Link:
https://www.unpac.me/results/6f1687c2-888a-4742-b732-a1d2329ce4c7/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a6a3d95c04dc/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Remcos
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/a6a3d95c04dca683d66b1e6dcf729a7ad0811c7bd7f9c19aa7076ba28f66fd0b

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: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:Typical_Malware_String_Transforms
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects typical strings in a reversed or otherwise modified form
Reference:Internal Research
Rule name:Typical_Malware_String_Transforms_RID3473
Create hunting rule
Author:Florian Roth
Description:Detects typical strings in a reversed or otherwise modified form
Reference:Internal Research
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.

Malspam

RemcosRAT

Executable exe a6a3d95c04dca683d66b1e6dcf729a7ad0811c7bd7f9c19aa7076ba28f66fd0b

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/476300/

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