MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 4effb7493819e25c61af5e224d8a774652957b99ec1faca19e1c84bd0c9ff840. 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: 16
| SHA256 hash: | 4effb7493819e25c61af5e224d8a774652957b99ec1faca19e1c84bd0c9ff840 |
|---|---|
| SHA3-384 hash: | d4312a5bf0a173f9a19182f68e8fc47f70511b9429ea622ec8a2a875535936ac5ce98c84bf2d77c497497d8064506e80 |
| SHA1 hash: | 2add679344806597898b1a6607304f0a8b64aee4 |
| MD5 hash: | 334931908f6bb226bec78bbbab2a8626 |
| humanhash: | spaghetti-fillet-tennessee-mockingbird |
| File name: | hostcr.exe |
| Download: | download sample |
| Signature | RemcosRAT |
| File size: | 16'342'528 bytes |
| First seen: | 2024-01-18 19:23:22 UTC |
| Last seen: | 2024-01-18 21:27:05 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'602 x Formbook, 12'241 x SnakeKeylogger) |
| ssdeep | 393216:pYeuu8z86s4morClmpS9q9FsqhYcUFNrADAH:9ubs4mHmg9q8yWzfH |
| Threatray | 3'305 similar samples on MalwareBazaar |
| TLSH | T1BAF6333572C5D7F1E1AA5AF0FA63C125D13CBD6A34C8F30E91D2B1528A3239DBA109D6 |
| TrID | 67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 9.7% (.EXE) Win64 Executable (generic) (10523/12/4) 6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.6% (.EXE) Win16 NE executable (generic) (5038/12/1) 4.1% (.EXE) Win32 Executable (generic) (4505/5/1) |
| File icon (PE): |  |
| dhash icon | 2a52d23a3a2de4c3 (4 x Arechclient2, 4 x RustyStealer, 3 x AgentTesla) |
| Reporter |  angel11VR |
| Tags: | .NET exe payload remcos RemcosRAT |
Intelligence
File Origin
# of uploads :
2
# of downloads :
383
Origin country :
CZVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Запит документів.zip
Verdict:
Suspicious activity
Analysis date:
2024-01-18 13:19:56 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:
Behaviour
Restart of the analyzed sample
Creating a file
Сreating synchronization primitives
Creating a process from a recently created file
Setting a keyboard event handler
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process by context flags manipulation
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
anti-vm obfuscated packed packed remcos smartassembly zusy
Verdict:
Malicious
Labled as:
Zusy.Generic
Result
Verdict:
MALICIOUS
Malware family:
REMCOS
Verdict:
Malicious
Result
Threat name:
Remcos
Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Connects to many ports of the same IP (likely port scanning)
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Creates autostart registry keys with suspicious names
Delayed program exit found
Found malware configuration
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)
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Score:
98%
Verdict:
Malware
File Type:
PE
Threat name:
Win32.Trojan.Remcos
Status:
Malicious
First seen:
2024-01-18 16:37:49 UTC
File Type:
PE (.Net Exe)
Extracted files:
23
AV detection:
21 of 24 (87.50%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
remcos
Similar samples:
+ 3'295 additional samples on MalwareBazaar
Result
Malware family:
remcos
Score:
10/10
Tags:
family:remcos botnet:host collection persistence rat spyware stealer
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Reads user/profile data of web browsers
NirSoft MailPassView
NirSoft WebBrowserPassView
Nirsoft
Remcos
Malware Config
C2 Extraction:
185.70.104.90:2404
185.70.104.90:8080
185.70.104.90:465
185.70.104.90:8080
185.70.104.90:465
Unpacked files
SH256 hash:
ba6ee802d60277f655b3c8d0215a2abd73d901a34e3c97741bc377199e3a8670
MD5 hash:
90530c7dc7d13a9bf77761ae78986743
SHA1 hash:
f002bf99bf6d0c577e43013ed8a240447353edc7
Detections:
Remcos
win_remcos_w0
win_remcos_auto
malware_windows_remcos_rat
INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
SH256 hash:
a5119253f48a9cdc7b4b84d25d26fe28af6b32dfa8781fdb20ac9ccd8987111c
MD5 hash:
861f3efa7b1f6d68059fc3e6a8d44dda
SHA1 hash:
0d1e3f5ed10a600ff87529d775cec9e023f83d66
SH256 hash:
4effb7493819e25c61af5e224d8a774652957b99ec1faca19e1c84bd0c9ff840
MD5 hash:
334931908f6bb226bec78bbbab2a8626
SHA1 hash:
2add679344806597898b1a6607304f0a8b64aee4
Detections:
INDICATOR_EXE_Packed_SmartAssembly
Malware family:
Remcos
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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: | DebuggerCheck__API |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DebuggerCheck__QueryInfo |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | iexplorer_remcos |
|---|---|
| Author: | iam-py-test |
| Description: | Detect iexplorer being taken over by Remcos |
| Rule name: | INDICATOR_EXE_Packed_SmartAssembly |
|---|---|
| Author: | ditekSHen |
| Description: | Detects executables packed with SmartAssembly |
| Rule name: | INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM |
|---|---|
| Author: | ditekSHen |
| Description: | Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) |
| Rule name: | maldoc_find_kernel32_base_method_1 |
|---|---|
| Author: | Didier Stevens (https://DidierStevens.com) |
| Rule name: | pe_imphash |
|---|
| Rule name: | Remcos |
|---|---|
| Author: | kevoreilly |
| Description: | Remcos Payload |
| Rule name: | REMCOS_RAT_variants |
|---|
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| Rule name: | ThreadControl__Context |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | Windows_Trojan_Remcos_b296e965 |
|---|---|
| Author: | Elastic Security |
| Rule name: | win_remcos_auto |
|---|---|
| Author: | Felix Bilstein - yara-signator at cocacoding dot com |
| Description: | Detects win.remcos. |
| Rule name: | win_remcos_w0 |
|---|---|
| Author: | Matthew @ Embee_Research |
| Description: | Detects strings present in remcos rat Samples. |
| Rule name: | yarahub_win_remcos_rat_unpacked_aug_2023 |
|---|---|
| Author: | Matthew @ Embee_Research |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Dropped by
remcos
Comments
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You need to login to in order to write a comment. Login with your abuse.ch account.#remcos #RAT #RAR #PWD #EXE #PowerShell
email attach .zip > (.rar1 + .rar2) PWD > .exe1 > get bitbucket_org > .exe2 > 185_70_104_90 & 77_105_132_70 > fingerprint & exfil
IOC`s
https://pastebin.com/FL2fX362