MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 23a9fcae2ce9752788c43abf7c44690775f8f20b22c7ad42d7f52c4202028d4c. 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: 8


Intelligence 8 IOCs YARA File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 23a9fcae2ce9752788c43abf7c44690775f8f20b22c7ad42d7f52c4202028d4c
SHA3-384 hash: 4a2e0c83ebf4fc959875776cdf668adb006498932a832ab781367be0e45427639d283a6d512bb344b48d4273fccb9fbe
SHA1 hash: 17b8af0aa863f0264326b8258b5dadd05dc7fcbf
MD5 hash: ac8bc2ea82605be2805a5c135ad49e42
humanhash: freddie-november-low-mississippi
File name:statement overdue.pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:361'984 bytes
First seen:2020-10-27 12:44:21 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 6144:ulzdTZ4rjNxG/i/OfFGr6cC0f4aK8jlQvmIpr:uV/4rjvGiO9C6cL6v5t
Threatray 378 similar samples on MalwareBazaar
TLSH BF74C0B17C92987ECA6A0775016985C0F9F617C73FA48B0D71AF430C4E11E2BAB6764B
Reporter abuse_ch
Tags:exe RemcosRAT


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: jacobpharma.com
Sending IP: 209.58.149.114
From: Katrin Accounting <info@jacobpharma.com>
Subject: AW: AW: SOA
Attachment: statement overdue.pdf.zip (contains "statement overdue.pdf.exe")

Intelligence

File Origin
# of uploads :
1
# of downloads :
78
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/79892/
Detection(s):
SecuriteInfo.com.BehavesLike.Win32.Generic.fc.18616.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% subdirectories
Sending a UDP request
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file
Creating a process from a recently created file
Creating a process with a hidden window
Deleting a recently created file
Running batch commands
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/513524
Signature
.NET source code contains very large array initializations
Contains functionality to capture and log keystrokes
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Creates an undocumented autostart registry key
Detected Remcos RAT
Initial sample is a PE file and has a suspicious name
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 dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Suspicious Double Extension
Tries to detect virtualization through RDTSC time measurements
Uses an obfuscated file name to hide its real file extension (double extension)
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 305879 Sample: statement overdue.pdf.exe Startdate: 27/10/2020 Architecture: WINDOWS Score: 100 38 Malicious sample detected (through community Yara rule) 2->38 40 Multi AV Scanner detection for submitted file 2->40 42 Detected Remcos RAT 2->42 44 11 other signatures 2->44 9 statement overdue.pdf.exe 7 2->9         started        13 remcos.exe 2 2->13         started        15 remcos.exe 2 2->15         started        17 remcos.exe 2 2->17         started        process3 file4 34 C:\Users\user\AppData\...\AgileDotNetRT.dll, PE32 9->34 dropped 36 C:\Users\user\AppData\...\AgileDotNetRT.dll, PE32 9->36 dropped 48 Injects a PE file into a foreign processes 9->48 19 statement overdue.pdf.exe 6 5 9->19         started        signatures5 process6 file7 32 C:\Users\user\AppData\Roaming\...\remcos.exe, PE32 19->32 dropped 46 Creates an undocumented autostart registry key 19->46 23 wscript.exe 1 19->23         started        signatures8 process9 process10 25 cmd.exe 1 23->25         started        process11 27 remcos.exe 3 25->27         started        30 conhost.exe 25->30         started        signatures12 50 Multi AV Scanner detection for dropped file 27->50 52 Machine Learning detection for dropped file 27->52 54 Tries to detect virtualization through RDTSC time measurements 27->54
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/23a9fcae2ce9752788c43abf7c44690775f8f20b22c7ad42d7f52c4202028d4c/
Threat name:
ByteCode-MSIL.Trojan.Wacatac
Create hunting rule
Status:
Malicious
First seen:
2020-10-27 11:19:01 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=eou7zlrm5f2spcgehk7xyrdja527r4qleld22qwx6uweeaqcrvga._file
Verdict:
unknown
Similar samples:
0edc105e9bc4e9b297487650e45b6ee0b0ca1e97e2194a2b455d657e428be977
RemcosRAT
13115d9faa05c1bfa921a587d03e71a727b6be5c589f83a458287691491ed378
RemcosRAT
223c38be022bf37ef243556438ecd472ae67bbb46fcf0e7ce4ea3173260141e9
RemcosRAT
395af6b7f6bc4e92938f11552d83d444b18e27708796de86396b91c3898adec4
RemcosRAT
4ceac7ec3850ec9af2132d4786ab4e0c9ca48fe79a39490b86d7ed4ab217e6c4
RemcosRAT
8dd5127608894ff5bc5a0c653c97fe7c252449669e254662a0bcd7c32c6b15fb
RemcosRAT
982c1c1db5ea18b83cdeb2f91672d093ff3258154c88334ed09dd736cb84c2d8
RemcosRAT
aa92ca49b0f84494890222ae164a725e2ff94d9a5e996cc124fbdcbe2f0882d5
RemcosRAT
bc07e7101d3f176c9b7fca71bd68dbd146bfe4e9ff2c18ea5cee0147f1c9ddad
RemcosRAT
f4ca039244746f1bd66d245c7e8d3f29abe101179636d2f09594fe51e2d37f83
RemcosRAT
+ 368 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/201027-94zdx321k6/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Adds policy Run key to start application
Executes dropped EXE
Remcos
Malware Config
C2 Extraction:
23.105.131.166:2888
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/23a9fcae2ce9752788c43abf7c44690775f8f20b22c7ad42d7f52c4202028d4c

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

RemcosRAT

zip f7ef55271c9c59a8c9a0c0c960f10c906bbe4e413ec6f55c645a3b9c04a9d4e1

RemcosRAT

Executable exe 23a9fcae2ce9752788c43abf7c44690775f8f20b22c7ad42d7f52c4202028d4c

(this sample)

  
Dropped by
MD5 efdc60a66513a41069115743ae8343eb
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 f7ef55271c9c59a8c9a0c0c960f10c906bbe4e413ec6f55c645a3b9c04a9d4e1
Cape
Cape
https://www.capesandbox.com/analysis/79892/

Comments