MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 43c8f7c4fd456d2e3db0c15024481db6681b8ea7c8f296f99957c36630f76e37. 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 28 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 43c8f7c4fd456d2e3db0c15024481db6681b8ea7c8f296f99957c36630f76e37
SHA3-384 hash: 13631e5f169c30df02469b4416c750379458da6b662a1f3fa0e757e532b124d7baeaa5150784b8cbeffe6fe71b5f834a
SHA1 hash: a40df64de9d9900de5ed7c40561930d347dee562
MD5 hash: 33b2cc2ce40499e2e07c398044ab4078
humanhash: fifteen-tennessee-avocado-william
File name:PROFORMA INVOICE-987678.pif.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:817'152 bytes
First seen:2023-11-07 07:55:08 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'738 x AgentTesla, 19'596 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 12288:ijLu6IOs9suoDSy61LSuNnZbZRIeopiaBL5n7ENA/YBQr8b:wLux9loey6UuApiaX77YW
TLSH T1C605DF8B1DFB3B9AE82546F365282A1D437E2C1EBCE9E257499D31D6D27AB844140F03
TrID 35.4% (.EXE) Win64 Executable (generic) (10523/12/4)
22.1% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
15.1% (.EXE) Win32 Executable (generic) (4505/5/1)
6.9% (.ICL) Windows Icons Library (generic) (2059/9)
6.8% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon 4c33d8d4d4d8324c (40 x AgentTesla, 23 x RedLineStealer, 15 x RemcosRAT)
Reporter abuse_ch
Tags:exe RAT RemcosRAT


Avatar
abuse_ch
RemcosRAT C2:
107.175.229.139:8087

Intelligence

File Origin
# of uploads :
1
# of downloads :
421
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
PROFORMA INVOICE-987678.pif.exe
Verdict:
Malicious activity
Analysis date:
2023-11-07 08:44:33 UTC
Tags:
remcos
Link:
https://app.any.run/tasks/fcd30a0b-cb49-4b40-bd61-01b66c1fc487

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.PWSX-gen.15027.27913.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Launching a process
Creating a file
Сreating synchronization primitives
Sending a custom TCP request
DNS request
Sending an HTTP GET request
Reading critical registry keys
Creating a file in the %temp% directory
Stealing user critical data
Unauthorized injection to a system process
Enabling autorun by creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
masquerade packed remcos
Link:
https://www.filescan.io/uploads/6549ed92946b6ab22459f0df/reports/f27b7838-c542-4b3a-beb5-0da03d9cd0fa/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/43c8f7c4fd456d2e3db0c15024481db6681b8ea7c8f296f99957c36630f76e37
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:
Generic Malware
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e9ff26e1-1950-42d6-80d5-cd998b1bca6f
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.spre.phis.troj.adwa.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1338093
Signature
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
Bypasses PowerShell execution policy
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 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
Creates executable files without a name
Delayed program exit found
Drops PE files to the startup folder
Found malware configuration
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
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
Powershell drops PE file
Sigma detected: Copy file to startup via Powershell
Sigma detected: Remcos
Snort IDS alert for network traffic
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)
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 dnsIp2 2 Behavior Graph ID: 1338093 Sample: PROFORMA_INVOICE-987678.pif.exe Startdate: 07/11/2023 Architecture: WINDOWS Score: 100 41 geoplugin.net 2->41 47 Snort IDS alert for network traffic 2->47 49 Multi AV Scanner detection for domain / URL 2->49 51 Found malware configuration 2->51 53 17 other signatures 2->53 8 PROFORMA_INVOICE-987678.pif.exe 3 2->8         started        11 .exe 3 2->11         started        signatures3 process4 signatures5 55 Bypasses PowerShell execution policy 8->55 13 cvtres.exe 8->13         started        16 powershell.exe 12 8->16         started        19 WMIADAP.exe 20 10 8->19         started        57 Writes to foreign memory regions 11->57 59 Injects a PE file into a foreign processes 11->59 21 cvtres.exe 3 15 11->21         started        24 powershell.exe 11 11->24         started        process6 dnsIp7 67 Contains functionality to bypass UAC (CMSTPLUA) 13->67 69 Tries to steal Mail credentials (via file registry) 13->69 71 Contains functionalty to change the wallpaper 13->71 83 6 other signatures 13->83 37 C:\Users\user\AppData\Roaming\...\.exe, PE32 16->37 dropped 73 Creates executable files without a name 16->73 75 Drops PE files to the startup folder 16->75 77 Powershell drops PE file 16->77 26 conhost.exe 16->26         started        43 107.175.229.139, 49729, 49730, 8087 AS-COLOCROSSINGUS United States 21->43 45 geoplugin.net 178.237.33.50, 49731, 80 ATOM86-ASATOM86NL Netherlands 21->45 39 C:\ProgramData\remcos\logs.dat, data 21->39 dropped 79 Maps a DLL or memory area into another process 21->79 81 Installs a global keyboard hook 21->81 28 cvtres.exe 1 21->28         started        31 cvtres.exe 1 21->31         started        33 cvtres.exe 2 21->33         started        35 conhost.exe 24->35         started        file8 signatures9 process10 signatures11 61 Tries to steal Instant Messenger accounts or passwords 28->61 63 Tries to harvest and steal browser information (history, passwords, etc) 28->63 65 Tries to steal Mail credentials (via file / registry access) 31->65
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/43c8f7c4fd456d2e3db0c15024481db6681b8ea7c8f296f99957c36630f76e37
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/43c8f7c4fd456d2e3db0c15024481db6681b8ea7c8f296f99957c36630f76e37/
Threat name:
Win32.Trojan.Remcos
Create hunting rule
Status:
Malicious
First seen:
2023-11-07 08:43:48 UTC
AV detection:
20 of 37 (54.05%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ipepprh5ivws4pnqyficisa5wzubxdvhzdzjn6mzk7bwmmhxny3q._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remcosbin collection rat
Link:
https://tria.ge/reports/231107-jsnp3adc71/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Program crash
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Drops startup file
NirSoft MailPassView
NirSoft WebBrowserPassView
Nirsoft
Remcos
Malware Config
C2 Extraction:
107.175.229.139:8087
Unpacked files
SH256 hash:
dcd1ef11a36957816efadb09d26e6b60884cea24007724657838e1a409025e49
MD5 hash:
750dc0538d837d88e3bc33891600870e
SHA1 hash:
bd11ff7f29a8e5eca7cdf949064ce59d24daf15a
Detections:
Remcos
Create hunting rule
win_remcos_w0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/309cb7a1-8f3e-4aea-9634-0299d88c5018/
Parent samples :
9886a3be9d53722c29fbb8dca746668425486070e9279dcad1f8db626b62110a
459fab3607c86f99959581b618ae69ce5ed530999e192e4d112cafc143b6df7d
43c8f7c4fd456d2e3db0c15024481db6681b8ea7c8f296f99957c36630f76e37
a5667f5a28c5e362c0b3a57b38f8d282a89730a7159fb8bdc81fa49ae9a11ac1
SH256 hash:
307055ab2b937aa5bdf68eb2a6be9c38cab6c01f8aabeed237da1424a43fd634
MD5 hash:
3a20414ca831be27a9309644d65efccd
SHA1 hash:
bacee4b527ddb91c833b98cc71ea6bebfe330247
Link:
https://www.unpac.me/results/309cb7a1-8f3e-4aea-9634-0299d88c5018/
SH256 hash:
2df81b7a7580dd8099502f1caaf6ecf3af80d9b04ffe32cf2ac7834d944cc1f2
MD5 hash:
4cfae6afed1c1626499592c0d6711f93
SHA1 hash:
9f41bbd487e22867d3942e0db7a394ae00a69009
Link:
https://www.unpac.me/results/309cb7a1-8f3e-4aea-9634-0299d88c5018/
SH256 hash:
43c8f7c4fd456d2e3db0c15024481db6681b8ea7c8f296f99957c36630f76e37
MD5 hash:
33b2cc2ce40499e2e07c398044ab4078
SHA1 hash:
a40df64de9d9900de5ed7c40561930d347dee562
Link:
https://www.unpac.me/results/309cb7a1-8f3e-4aea-9634-0299d88c5018/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/43c8f7c4fd45/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
iSpy Keylogger
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/43c8f7c4fd456d2e3db0c15024481db6681b8ea7c8f296f99957c36630f76e37

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: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.

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