MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3da90b636e39cd1f67e3542c60d813c6ff8152f7f740b3ef4ef086ef120836df. 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: 18


Intelligence 18 IOCs YARA 8 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 3da90b636e39cd1f67e3542c60d813c6ff8152f7f740b3ef4ef086ef120836df
SHA3-384 hash: 48f15dea11dac57a2a425c884ea363ef62a425d0c6668f1b6048a6b2ac6040f56c3e957b6ac18b5baa025dba17ef70fd
SHA1 hash: 49522f33f7f2852d9637c98d560437b4d88adcd5
MD5 hash: 4daef76971794649d0c0bcc97a9fd246
humanhash: lima-monkey-december-ceiling
File name:4daef76971794649d0c0bcc97a9fd246
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:540'532 bytes
First seen:2023-06-28 04:34:10 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 741 x AgentTesla, 427 x GuLoader)
ssdeep 12288:0YxD6czlyK/Mu6h3qbnqy5FeTl52WtE8uped:0YxDjlF6h3AqucP1tbX
Threatray 2'133 similar samples on MalwareBazaar
TLSH T170B4120BB61CA76EE39B47737C3D06715698DF231A606A05BBC1FD1E243158DA90B3E2
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon e2ee8a8eb6d8ecf4 (56 x AgentTesla, 39 x RemcosRAT, 38 x GuLoader)
Reporter zbetcheckin
Tags:32 exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
326
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
4daef76971794649d0c0bcc97a9fd246
Verdict:
Malicious activity
Analysis date:
2023-06-28 04:36:18 UTC
Tags:
remcos
Link:
https://app.any.run/tasks/d47a65ad-8ed2-49f2-9abf-95a54972ddc4

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/403387/
Detection(s):
Sanesecurity.Malware.28885.BadCo.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a file
Creating a file in the %AppData% subdirectories
Сreating synchronization primitives
Creating a process from a recently created file
Sending a custom TCP request
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
Unauthorized injection to a recently created process by context flags manipulation
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/93956/overview
Behaviour
MalwareBazaar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/649bb878313e9da61a5bacb5/reports/c0ecec64-407f-46b1-9c11-d11ba2cf7df1/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/3da90b636e39cd1f67e3542c60d813c6ff8152f7f740b3ef4ef086ef120836df
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/cbff05c0-6979-44b3-87cc-2525f6b1cf4b
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1262438
Signature
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to modify clipboard data
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Creates autostart registry keys with suspicious names
Creates multiple autostart registry keys
Delayed program exit found
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Found malware configuration
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 dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 895468 Sample: 4zqp08pI0W.exe Startdate: 28/06/2023 Architecture: WINDOWS Score: 100 61 Found malware configuration 2->61 63 Malicious sample detected (through community Yara rule) 2->63 65 Antivirus detection for dropped file 2->65 67 8 other signatures 2->67 8 4zqp08pI0W.exe 1 21 2->8         started        12 cluq.exe 19 2->12         started        14 chromes.exe 19 2->14         started        16 chromes.exe 19 2->16         started        process3 file4 45 C:\Users\user\AppData\Roaming\...\cluq.exe, PE32 8->45 dropped 47 C:\Users\user\AppData\Local\...\jzowju.dll, PE32 8->47 dropped 75 Contains functionality to bypass UAC (CMSTPLUA) 8->75 77 Detected unpacking (changes PE section rights) 8->77 79 Detected unpacking (overwrites its own PE header) 8->79 87 6 other signatures 8->87 18 4zqp08pI0W.exe 2 4 8->18         started        49 C:\Users\user\AppData\Local\...\jzowju.dll, PE32 12->49 dropped 81 Multi AV Scanner detection for dropped file 12->81 83 Machine Learning detection for dropped file 12->83 85 Maps a DLL or memory area into another process 12->85 22 cluq.exe 12->22         started        51 C:\Users\user\AppData\Local\...\jzowju.dll, PE32 14->51 dropped 24 chromes.exe 19 14->24         started        26 chromes.exe 14->26         started        53 C:\Users\user\AppData\Local\...\jzowju.dll, PE32 16->53 dropped 28 chromes.exe 16->28         started        signatures5 process6 file7 39 C:\ProgramData\chromes\chromes.exe, PE32 18->39 dropped 41 C:\...\chromes.exe:Zone.Identifier, ASCII 18->41 dropped 69 Creates autostart registry keys with suspicious names 18->69 71 Creates multiple autostart registry keys 18->71 30 chromes.exe 19 18->30         started        43 C:\Users\user\AppData\Local\...\jzowju.dll, PE32 24->43 dropped 73 Maps a DLL or memory area into another process 24->73 34 chromes.exe 24->34         started        signatures8 process9 file10 55 C:\Users\user\AppData\Local\...\jzowju.dll, PE32 30->55 dropped 89 Multi AV Scanner detection for dropped file 30->89 91 Contains functionality to bypass UAC (CMSTPLUA) 30->91 93 Detected unpacking (changes PE section rights) 30->93 95 8 other signatures 30->95 36 chromes.exe 3 14 30->36         started        signatures11 process12 dnsIp13 57 5.253.114.108, 2022, 49692 CLOUVIDERClouvider-GlobalASNGB United Kingdom 36->57 59 geoplugin.net 178.237.33.50, 49693, 80 ATOM86-ASATOM86NL Netherlands 36->59
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/3da90b636e39cd1f67e3542c60d813c6ff8152f7f740b3ef4ef086ef120836df/
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2023-06-27 05:12:26 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
20 of 24 (83.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=hwuqwy3ohhgr6z7dkqwgbwaty37ycuxx65alh32o6cdo6eqig3pq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
1a925bac006fd8d7a5d58d0229eabe2e30634626731add96939b0ab542c446a5
RemcosRAT
4b66b1c337c83ccb79e4862a7a32421fd75a565a59fee1f830d4aae55b64af9a
RemcosRAT
755c5cfdaf13b6a255c3b2015da23ce5e634b0e896e13a95b7fe0a97389c8f0d
RemcosRAT
882a895b320ba323dccd33d6d82e02b4506b7386a91c63c0c505345796352d67
RemcosRAT
b41e4528449d3fa1730eca98df0dc9fd9e3683ccfaedf1d72ee2af2899f18db8
RemcosRAT
cf8056e691bd5d73dbffedb8228a1cb2bee27791633c7cf2114041112f66b93d
RemcosRAT
df5481a99a394e2019c2665fa75f4b81bb4cf0afcd5b7c268ea6f01988ece3fc
RemcosRAT
+ 2'123 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:log persistence rat
Link:
https://tria.ge/reports/230628-e7nw6agc77/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Remcos
Malware Config
C2 Extraction:
5.253.114.108:2022
Unpacked files
SH256 hash:
7a613cced366b6345cd15449036a5ab7559058ca2988bbb267e655c71438cf33
MD5 hash:
ad28a4eb8b1c753de37dd6fb281e6e29
SHA1 hash:
a9a95e4033e96ce2dd6d542a7d8cb16175aed1d0
Link:
https://www.unpac.me/results/fe56d5c9-86d3-43da-9e79-ccbc6bb42734/
SH256 hash:
3da90b636e39cd1f67e3542c60d813c6ff8152f7f740b3ef4ef086ef120836df
MD5 hash:
4daef76971794649d0c0bcc97a9fd246
SHA1 hash:
49522f33f7f2852d9637c98d560437b4d88adcd5
Link:
https://www.unpac.me/results/fe56d5c9-86d3-43da-9e79-ccbc6bb42734/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/3da90b636e39/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/3da90b636e39cd1f67e3542c60d813c6ff8152f7f740b3ef4ef086ef120836df

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:iexplorer_remcos
Create hunting rule
Author:iam-py-test
Description:Detect iexplorer being taken over by Remcos
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:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
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.

File information

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

Web download

RemcosRAT

Executable exe 3da90b636e39cd1f67e3542c60d813c6ff8152f7f740b3ef4ef086ef120836df

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/403387/
  
URLhaus
https://urlhaus.abuse.ch/url/2673247/

Comments


Avatar
zbet commented on 2023-06-28 04:34:11 UTC

url : hxxp://79.110.49.21/papizx.exe