MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4b3b8c9037168a82409fbe027ecf77ba5b1b9262960b07dde8e15acfb1e3a5df. 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: 13


Intelligence 13 IOCs YARA File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4b3b8c9037168a82409fbe027ecf77ba5b1b9262960b07dde8e15acfb1e3a5df
SHA3-384 hash: 28cfab5b43f60285e385f255ce58bf443d017182a22456bdb0e4d934564391ad67470b765baf1cc4dcfb7f7584d4164d
SHA1 hash: e1749d768d96ff23170911120926710a7bfab296
MD5 hash: 4586aba4f3ba423d5f7e4802b2c94bf9
humanhash: finch-carbon-winter-purple
File name:4586aba4f3ba423d5f7e4802b2c94bf9
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'599'560 bytes
First seen:2022-11-14 03:49:00 UTC
Last seen:2022-11-14 05:41:16 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash abf17bbb1d234cebb6ddea72cf750325 (2 x RemcosRAT, 1 x Smoke Loader, 1 x LgoogLoader)
ssdeep 24576:jU5hm5qPzuMDjBndCL6iVigdG6LeMYbjoWg3LGE7nqIOMWRbmNCFsB1V:jUbHPSOV0L6siAGxotLoIOMWRbmoS/V
TLSH T18775AE76E73EF8BBD910D9F69AF02982D2B0FA502C3A7B06713E26D4EB061460F47155
TrID 32.2% (.EXE) Win64 Executable (generic) (10523/12/4)
20.1% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
15.4% (.EXE) Win16 NE executable (generic) (5038/12/1)
13.7% (.EXE) Win32 Executable (generic) (4505/5/1)
6.2% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon c4d2d0c9d8d8c8f9 (3 x AgentTesla, 2 x Formbook, 2 x Rhadamanthys)
Reporter zbetcheckin
Tags:32 exe RemcosRAT signed

Code Signing Certificate

Organisation:www.expedia.com
Issuer:GeoTrust RSA CA 2018
Algorithm:sha256WithRSAEncryption
Valid from:2022-09-05T00:00:00Z
Valid to:2023-09-08T23:59:59Z
Serial number: 0db614a16e563cb7adf15ce18fea2891
Intelligence: 2 malware samples on MalwareBazaar are signed with this code signing certificate
Thumbprint Algorithm:SHA256
Thumbprint: 6d714a748d919cab0a98d2162175b74765085ca3114f6a74d9e86ddc0ddaaf80
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
208
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
4586aba4f3ba423d5f7e4802b2c94bf9
Verdict:
Malicious activity
Analysis date:
2022-11-14 03:51:40 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/68a4435f-7d44-4f2a-9130-7adaf360801c

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/333525/
Detection(s):
SecuriteInfo.com.Win32.BackdoorX-gen.7138.10737.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a window
DNS request
Creating a file
Sending a custom TCP request
Result
Malware family:
n/a
Score:
  8/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/52189/overview
Behaviour
MalwareBazaar
SystemUptime
MeasuringTime
EvasionGetTickCount
EvasionQueryPerformanceCounter
CheckCmdLine
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
greyware overlay packed
Link:
https://www.filescan.io/uploads/6371baae07c3f5e84a00fc88/reports/d4c4cf3a-57f3-4273-b6d9-65890d88afb7/overview
Result
Verdict:
SUSPICIOUS
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/e5c58ef9-b345-4d41-ad00-fa25d27bdd00
Result
Threat name:
Remcos, Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1112551
Signature
Allocates memory in foreign processes
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Drops PE files with benign system names
Hides threads from debuggers
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)
Multi AV Scanner detection for submitted file
PE file has nameless sections
Self deletion via cmd or bat file
Sigma detected: Remcos
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (window names)
Tries to evade debugger and weak emulator (self modifying code)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Crypto Currency Wallets
Uses ping.exe to check the status of other devices and networks
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected Remcos RAT
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 745247 Sample: eyPEFRBevf.exe Startdate: 14/11/2022 Architecture: WINDOWS Score: 100 99 Malicious sample detected (through community Yara rule) 2->99 101 Antivirus detection for URL or domain 2->101 103 Multi AV Scanner detection for submitted file 2->103 105 8 other signatures 2->105 8 eyPEFRBevf.exe 10 2->8         started        13 cedomo wakeni namoxa.exe 13 2->13         started        process3 dnsIp4 61 ulnq5dbq86ysrqm8.d8jit8ofpzuiaqovzjvdodjoq 8->61 57 C:\Users\user\...\cedomo wakeni namoxa.exe, PE32 8->57 dropped 59 cedomo wakeni namoxa.exe:Zone.Identifier, ASCII 8->59 dropped 107 Self deletion via cmd or bat file 8->107 109 Uses schtasks.exe or at.exe to add and modify task schedules 8->109 15 cedomo wakeni namoxa.exe 19 8->15         started        20 cmd.exe 1 8->20         started        22 schtasks.exe 1 8->22         started        63 ulnq5dbq86ysrqm8.d8jit8ofpzuiaqovzjvdodjoq 13->63 111 Writes to foreign memory regions 13->111 113 Allocates memory in foreign processes 13->113 115 Injects a PE file into a foreign processes 13->115 24 svchost.exe 13->24         started        26 ngentask.exe 13->26         started        file5 signatures6 process7 dnsIp8 77 ulnq5dbq86ysrqm8.d8jit8ofpzuiaqovzjvdodjoq 15->77 79 xpertsolutionsac.com 192.185.25.46, 443, 49703, 49705 UNIFIEDLAYER-AS-1US United States 15->79 47 C:\Users\user\AppData\Local\...\svchost.exe, MS-DOS 15->47 dropped 49 C:\Users\user\AppData\Local\...\advapi32.dll, PE32 15->49 dropped 51 C:\Users\user\AppData\...\resource[1].bin, MS-DOS 15->51 dropped 53 C:\Users\user\AppData\...\library[1].bin, PE32 15->53 dropped 83 Writes to foreign memory regions 15->83 85 Allocates memory in foreign processes 15->85 87 Injects a PE file into a foreign processes 15->87 28 svchost.exe 16 15->28         started        32 ngentask.exe 2 15 15->32         started        89 Uses ping.exe to check the status of other devices and networks 20->89 35 PING.EXE 1 20->35         started        37 conhost.exe 20->37         started        39 chcp.com 1 20->39         started        41 conhost.exe 22->41         started        81 t.me 24->81 91 System process connects to network (likely due to code injection or exploit) 24->91 93 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 24->93 95 Tries to harvest and steal browser information (history, passwords, etc) 24->95 97 2 other signatures 24->97 43 WerFault.exe 24->43         started        file9 signatures10 process11 dnsIp12 65 88.99.120.225, 49707, 49712, 80 HETZNER-ASDE Germany 28->65 67 t.me 149.154.167.99, 443, 49706, 49711 TELEGRAMRU United Kingdom 28->67 117 System process connects to network (likely due to code injection or exploit) 28->117 119 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 28->119 121 Tries to detect sandboxes and other dynamic analysis tools (window names) 28->121 125 4 other signatures 28->125 45 WerFault.exe 28->45         started        69 sas.yuldede.com 194.5.98.201, 4040, 49702 DANILENKODE Netherlands 32->69 71 geoplugin.net 178.237.33.50, 49704, 80 ATOM86-ASATOM86NL Netherlands 32->71 55 C:\ProgramData\remcos\logs.dat, data 32->55 dropped 123 Installs a global keyboard hook 32->123 73 127.0.0.1 unknown unknown 35->73 75 192.168.2.1 unknown unknown 35->75 file13 signatures14 process15
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4b3b8c9037168a82409fbe027ecf77ba5b1b9262960b07dde8e15acfb1e3a5df/
Threat name:
Win32.Trojan.Woreflint
Create hunting rule
Status:
Malicious
First seen:
2022-11-14 03:13:51 UTC
File Type:
PE (Exe)
Extracted files:
6
AV detection:
11 of 25 (44.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jm5yzebxc2fieqe7xybh5t3xxjnrxetcsyfqpxpi4fnm7mpduxpq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Result
Malware family:
vidar
Create hunting rule
Score:
  10/10
Tags:
family:remcos family:vidar botnet:1754 botnet:remotehost discovery rat spyware stealer
Link:
https://tria.ge/reports/221114-edca9sef54/
Behaviour
Checks processor information in registry
Creates scheduled task(s)
Delays execution with timeout.exe
Runs ping.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Accesses 2FA software files, possible credential harvesting
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Checks computer location settings
Deletes itself
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Executes dropped EXE
Remcos
Suspicious use of NtCreateUserProcessOtherParentProcess
Vidar
Malware Config
C2 Extraction:
sas.yuldede.com:4040
https://t.me/seclab_new
https://github.com/smbfhrgc
Verdict:
Informative
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/b5598304-4c40-4adf-bb06-e805d97bfee2
Unpacked files
SH256 hash:
a980839379c00db46b3e2500213f42719fbf2a1a5ccd48487f5ced2ff5f5e773
MD5 hash:
5a484b4e30e491153b12ca8ef915945a
SHA1 hash:
c90269b5ed1729e35d303b1176bfa7a5bea7efa1
Link:
https://www.unpac.me/results/593cbc32-d307-4c92-952c-1da2fde959ea/
SH256 hash:
4b3b8c9037168a82409fbe027ecf77ba5b1b9262960b07dde8e15acfb1e3a5df
MD5 hash:
4586aba4f3ba423d5f7e4802b2c94bf9
SHA1 hash:
e1749d768d96ff23170911120926710a7bfab296
Link:
https://www.unpac.me/results/593cbc32-d307-4c92-952c-1da2fde959ea/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4b3b8c903716/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/4b3b8c9037168a82409fbe027ecf77ba5b1b9262960b07dde8e15acfb1e3a5df

File information

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

Web download

RemcosRAT

Executable exe 4b3b8c9037168a82409fbe027ecf77ba5b1b9262960b07dde8e15acfb1e3a5df

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2410234/
Cape
Cape
https://www.capesandbox.com/analysis/333525/

Comments


Avatar
zbet commented on 2022-11-14 03:49:07 UTC

url : hxxp://46.183.220.20/422/vbc.exe