MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3c8d5a42b3b1e9ec4c489d8ec98ba60d6d107e62b2d1a2cc43570840374ff05f. 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


RevCodeRAT


Vendor detections: 7


Intelligence 7 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 3c8d5a42b3b1e9ec4c489d8ec98ba60d6d107e62b2d1a2cc43570840374ff05f
SHA3-384 hash: ebab55eb9c53c0fa82a5cf348debc405e41a709a18974dde539ff8f516860c8fc0418da36f40810beba96e9474e5d692
SHA1 hash: 628af1ff11ecd9101e73dc0971d432e1c64e26fe
MD5 hash: f3370ea593b2afe30af97925d3a63295
humanhash: pennsylvania-zebra-juliet-minnesota
File name:zd4vWiNB908TG99.exe
Download: download sample
Signature RevCodeRAT
Create hunting rule
File size:1'031'680 bytes
First seen:2020-08-05 08:41:38 UTC
Last seen:2020-08-11 11:36:01 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 24576:+3bPqMU8eqiuGGkALvSZAT+i4oUYJ3F4xl1MYN/VeEAc:AiOiuGGksvSZAT4oUYahdVen
Threatray 42 similar samples on MalwareBazaar
TLSH 9225129DB3A0B25CF23A1D3F5C7445A38E11F91FD920D29B297122B9563E64CBE20F91
Reporter abuse_ch
Tags:exe RevCodeRAT


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: [50.3.177.69]
Sending IP: 50.3.177.69
From: accounts@inter-corpproltd.com
Subject: RE: STATEMENT OF ACCOUNT
Attachment: Statement_zd4vWiNB908TG99.uue (contains "zd4vWiNB908TG99.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
60
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/39246/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a window
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
Creating a file
Enabling autorun by creating a file
Unauthorized injection to a system process
Result
Threat name:
Unknown
Detection:
malicious
Classification:
evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/410644
Signature
Allocates memory in foreign processes
Contain functionality to detect virtual machines
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Potentially malicious time measurement code found
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: Scheduled temp file as task from temp location
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM_3
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 257593 Sample: zd4vWiNB908TG99.exe Startdate: 05/08/2020 Architecture: WINDOWS Score: 100 33 Sigma detected: Scheduled temp file as task from temp location 2->33 35 Yara detected AntiVM_3 2->35 37 Machine Learning detection for sample 2->37 39 3 other signatures 2->39 8 zd4vWiNB908TG99.exe 5 2->8         started        process3 file4 25 C:\Users\user\AppData\...\TqIIWvfdyqgCej.exe, PE32 8->25 dropped 27 C:\...\TqIIWvfdyqgCej.exe:Zone.Identifier, ASCII 8->27 dropped 29 C:\Users\user\AppData\Local\...\tmp530A.tmp, XML 8->29 dropped 31 C:\Users\user\...\zd4vWiNB908TG99.exe.log, ASCII 8->31 dropped 41 Writes to foreign memory regions 8->41 43 Allocates memory in foreign processes 8->43 45 Injects a PE file into a foreign processes 8->45 47 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 8->47 12 RegSvcs.exe 2 8->12         started        15 wuapihost.exe 8->15         started        17 schtasks.exe 1 8->17         started        signatures5 process6 signatures7 49 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 12->49 51 Contain functionality to detect virtual machines 12->51 53 Tries to detect virtualization through RDTSC time measurements 12->53 55 Potentially malicious time measurement code found 12->55 19 cmd.exe 1 12->19         started        21 conhost.exe 17->21         started        process8 process9 23 conhost.exe 19->23         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/3c8d5a42b3b1e9ec4c489d8ec98ba60d6d107e62b2d1a2cc43570840374ff05f/
Threat name:
ByteCode-MSIL.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2020-08-05 03:48:45 UTC
AV detection:
24 of 28 (85.71%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=hsgvuqvtwhu6ytcitwhmtc5gbvwra7tcwli2ftcdk4eean2p6bpq._file
Verdict:
malicious
Similar samples:
2bc1fb27f988d0d3beebcc805b59232c7cf182daa66cbbd642f18c7faab6639f
RevCodeRAT
2e1ae006b7e36e902198d9978964651ac51f62484dc23a9423d4c8848d585a69
RevCodeRAT
3528262d84ec15b8f88df39fe817d32a773274d53541ceee13c983c81b15fcf6
RevCodeRAT
54e9e8ac005eba3cd288eac02d69cb77b8b419b5bf00da41f175d40aec919717
RevCodeRAT
55416c27dc034735dba35002a4c206b05ab35bc197a56584d2ddba5dad588633
RevCodeRAT
566af71633f6af78b39270d21853decfe26f41cb866272ec4e530f7e9f14a0cb
RevCodeRAT
8246f2b18a1592cc2a37c001e2415412f5e63d14220324ae8356981e25a4ba76
RevCodeRAT
ac2a1a0b8560a6c0305e4d8e4fba8221974f011c5b52a5adec277268d4715f69
RevCodeRAT
b4bcaf498b1539174dc5b957878e22b4c0befdc0d39c6b1c5ccd6467678112f5
RevCodeRAT
bd6ae166438e850f91430a43cbae4caf84d78ea85706bb459b8f9facf3965b52
RevCodeRAT
+ 32 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  3/10
Tags:
n/a
Link:
https://tria.ge/reports/200805-s73erknc3e/
Behaviour
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Program crash
Suspicious use of SetThreadContext
Adds Run key to start application
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/3c8d5a42b3b1e9ec4c489d8ec98ba60d6d107e62b2d1a2cc43570840374ff05f

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:win_webmonitor_w0
Create hunting rule
Author:James_inthe_box
Description:Revcode RAT
Reference:ee1b9659f2193896ce3469b5f90b82af3caffcba428e8524be5a9fdf391d8dd8

File information

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

Malspam

RevCodeRAT

uue 6e66134aa8b2a4317e0e2fff2d8665c2476238c8a37d66359f3e94804f5f86f8

RevCodeRAT

Executable exe 3c8d5a42b3b1e9ec4c489d8ec98ba60d6d107e62b2d1a2cc43570840374ff05f

(this sample)

  
Dropped by
MD5 b776f299003ca5b86a199c2ef01f39f0
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/39246/
  
Dropped by
SHA256 6e66134aa8b2a4317e0e2fff2d8665c2476238c8a37d66359f3e94804f5f86f8

Comments