MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3251570bf53a437adeb0d9ba5adcf9fb937e4d703d000cdb1be6922a9d4872bc. 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: 15


Intelligence 15 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 3251570bf53a437adeb0d9ba5adcf9fb937e4d703d000cdb1be6922a9d4872bc
SHA3-384 hash: 751f290d7497f2b1eb696148170d330a970129f5db79abc3c909021c797acdc9caf0dd0f40df87a0cc12cdda0bc51c15
SHA1 hash: 1529b3621cefaa9585a66a7f2d0dbdec826a04ed
MD5 hash: d9113a630d4f82e662b9476ba88a8fa4
humanhash: sixteen-michigan-edward-hot
File name:z1URGENTRFQ.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:769'024 bytes
First seen:2023-03-17 12:23:32 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
ssdeep 12288:Dwc3h1D8/kkZCwOYvtD0Kb4vpUxi1N0ljmmRqxFh7mYW3Ed1oAidu17:Dth1TMAMDdb4RyswjmmRqxeX
Threatray 586 similar samples on MalwareBazaar
TLSH T115F4012621A34662D6848E349CD0233EBFA33FC4B57A7508A8FC3B955D638733935A5D
TrID 44.4% (.EXE) Win64 Executable (generic) (10523/12/4)
21.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
8.7% (.ICL) Windows Icons Library (generic) (2059/9)
8.5% (.EXE) OS/2 Executable (generic) (2029/13)
8.4% (.EXE) Generic Win/DOS Executable (2002/3)
Reporter FXOLabs
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
231
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
z1URGENTRFQ.exe
Verdict:
Malicious activity
Analysis date:
2023-03-17 12:28:44 UTC
Tags:
remcos
Link:
https://app.any.run/tasks/7999f979-9e06-476a-813f-f0ccd7d69f0a

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/375084/
Detection(s):
Porcupine.MSIL.GenKryptik.GHSR.103984.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Using the Windows Management Instrumentation requests
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Creating a file
Sending a custom TCP request
Launching a process
Creating a process from a recently created file
DNS request
Sending an HTTP GET request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process
Forced shutdown of a system process
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/64145be428f6cfd59136abcd/reports/c2e2656a-8715-422b-870a-4222f151d6a5/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/3251570bf53a437adeb0d9ba5adcf9fb937e4d703d000cdb1be6922a9d4872bc
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/f06b19c8-b293-4122-a4f2-1a33157c95c7
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1195792
Signature
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to steal Firefox passwords or cookies
Delayed program exit found
Drops PE files with benign system names
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 domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: Remcos
Sigma detected: Schedule system process
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 828689 Sample: z1URGENTRFQ.exe Startdate: 17/03/2023 Architecture: WINDOWS Score: 100 66 Multi AV Scanner detection for domain / URL 2->66 68 Malicious sample detected (through community Yara rule) 2->68 70 Multi AV Scanner detection for submitted file 2->70 72 8 other signatures 2->72 8 z1URGENTRFQ.exe 1 7 2->8         started        12 svchost.exe 2 2->12         started        14 svchost.exe 2 2->14         started        16 svchost.exe 2 2->16         started        process3 file4 52 C:\Users\user\AppData\Roaming\svchost.exe, PE32+ 8->52 dropped 54 C:\Users\user\AppData\...\z1URGENTRFQ.exe.log, CSV 8->54 dropped 80 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 8->80 82 Drops PE files with benign system names 8->82 18 cmd.exe 1 8->18         started        20 cmd.exe 1 8->20         started        84 Multi AV Scanner detection for dropped file 12->84 86 Machine Learning detection for dropped file 12->86 88 Writes to foreign memory regions 12->88 23 ComSvcConfig.exe 12->23         started        25 mscorsvw.exe 12->25         started        33 4 other processes 12->33 90 Injects a PE file into a foreign processes 14->90 27 WsatConfig.exe 14->27         started        29 EdmGen.exe 14->29         started        31 aspnet_state.exe 14->31         started        35 25 other processes 14->35 signatures5 process6 signatures7 37 svchost.exe 3 18->37         started        40 conhost.exe 18->40         started        42 timeout.exe 1 18->42         started        74 Uses schtasks.exe or at.exe to add and modify task schedules 20->74 44 conhost.exe 20->44         started        46 schtasks.exe 1 20->46         started        process8 signatures9 76 Writes to foreign memory regions 37->76 78 Injects a PE file into a foreign processes 37->78 48 AddInProcess32.exe 3 13 37->48         started        process10 dnsIp11 56 89.37.99.49, 49695, 5888 BANDWIDTH-ASGB Romania 48->56 58 geoplugin.net 178.237.33.50, 49696, 80 ATOM86-ASATOM86NL Netherlands 48->58 60 Contains functionality to bypass UAC (CMSTPLUA) 48->60 62 Contains functionality to steal Firefox passwords or cookies 48->62 64 Delayed program exit found 48->64 signatures12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/3251570bf53a437adeb0d9ba5adcf9fb937e4d703d000cdb1be6922a9d4872bc/
Threat name:
Win64.Trojan.Leonem
Create hunting rule
Status:
Malicious
First seen:
2023-03-16 14:07:26 UTC
File Type:
PE+ (.Net Exe)
Extracted files:
2
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=gjivoc7vhjbxvxvq3g5fvxhz7ojx4tlqhuaazwy342jcvhkiok6a._file
Verdict:
malicious
Similar samples:
0a0debbbfe0c321661a6f911fc895997b512405cb9ba90c41f547dc410733b6b
RemcosRAT
424d826a20c0c5792190c4b0a591aa3906ae2f5f73695f92a7ffe9971cb155a4
RemcosRAT
658e0f3e03622f2ef3a44be0e3c19d116f9e7445dacc1b6264ea75ed2af25294
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85bc631d0e67651ca8d58602830378a006b44a898ec008da40c26f8928e378ec
RemcosRAT
aa0e0b9735614a120e1d49cd292470953e32f8d7b3fd299c0f7561400c4da72f
RemcosRAT
bc9a80c327839012274d763d66186497685a6b73e0b20eea73c720d61f5c9407
RemcosRAT
ddcfd6bd425a2ab84afef1a8443c3a9c858502d6eaa882c6f4cb830784d779b6
RemcosRAT
efa6869eaa796429cbd684b030cb6873262f6009997fe6f4c20ebd69b4ad54b6
RemcosRAT
fe14ae75b872e1b4419de4aac769c767a5d23479d2bd6c957be5648ad802a246
RemcosRAT
+ 576 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost evasion persistence rat
Link:
https://tria.ge/reports/230317-pk2vlsgb73/
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Enumerates physical storage devices
Program crash
Suspicious use of SetThreadContext
Adds Run key to start application
Maps connected drives based on registry
Checks BIOS information in registry
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Uses the VBS compiler for execution
Looks for VMWare Tools registry key
Looks for VirtualBox Guest Additions in registry
Remcos
Malware Config
C2 Extraction:
89.37.99.49:5888
Unpacked files
SH256 hash:
3251570bf53a437adeb0d9ba5adcf9fb937e4d703d000cdb1be6922a9d4872bc
MD5 hash:
d9113a630d4f82e662b9476ba88a8fa4
SHA1 hash:
1529b3621cefaa9585a66a7f2d0dbdec826a04ed
Link:
https://www.unpac.me/results/83377b4e-479d-44d2-98cc-71d203819777/
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/3251570bf53a437adeb0d9ba5adcf9fb937e4d703d000cdb1be6922a9d4872bc

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:pdb_YARAify
Create hunting rule
Author:@wowabiy314
Description:PDB

File information

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

Malspam

RemcosRAT

Executable exe 3251570bf53a437adeb0d9ba5adcf9fb937e4d703d000cdb1be6922a9d4872bc

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/375084/

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