MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 33a8c3e40fddaad6562484999ff394278be8b5310591a73bcd01573354dd20d5. 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: 19


Intelligence 19 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 33a8c3e40fddaad6562484999ff394278be8b5310591a73bcd01573354dd20d5
SHA3-384 hash: 8317aaa27850d4fb8618d855352132342cf05d3b61621ee2c380c35bbb7238809206ad1f9c98d2591f9283d006b6d538
SHA1 hash: 8d44394862a6f6f154f182ec53a35d40b79a4dad
MD5 hash: 0d0f42c9c2415cf03216a0dfb988eab5
humanhash: batman-pizza-violet-steak
File name:rVGM-so_7207S04.scr
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'071'104 bytes
First seen:2025-03-26 05:31:21 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'662 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:RJaywBwrO0OO2aOT6qDw4kkz1r8PkuMwREVLsbNVe5ssL:RVQ0OyOT6qkkz1zXsw
Threatray 714 similar samples on MalwareBazaar
TLSH T12E35123D7AB59A69C64C2F37C443500897AAC997D162F36E58D83DF01E72682C48FFA1
TrID 69.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.0% (.EXE) Win64 Executable (generic) (10522/11/4)
6.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.2% (.EXE) Win32 Executable (generic) (4504/4/1)
1.9% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Magika pebin
dhash icon 16e8c8e8e8c8e812 (10 x SnakeKeylogger, 9 x Formbook, 6 x MassLogger)
Reporter FXOLabs
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
601
Origin country :
BR BR
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
rVGM-so_7207S04.scr
Verdict:
Malicious activity
Analysis date:
2025-03-26 05:35:06 UTC
Tags:
remcos rat remote stealer
Link:
https://app.any.run/tasks/ed5bc91d-e39e-4b30-9e20-23d7901600d7

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.CrypterX-gen.6937.3956.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67e3915f12b5dc44da3e2985
Tags:
micro lien msil sage
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Restart of the analyzed sample
Creating a file
Сreating synchronization primitives
Creating a process from a recently created file
Connection attempt
Sending a custom TCP request
DNS request
Sending an HTTP GET request
Launching a process
Reading critical registry keys
Creating a file in the %temp% directory
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
Stealing user critical data
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
masquerade obfuscated obfuscated packed packed packer_detected vbnet
Link:
https://www.filescan.io/uploads/67e3915ed07c4c37a25d9bf4/reports/7c1b11e4-00d5-42eb-9c4f-aeaf2c791e76/overview
Verdict:
Malicious
Labled as:
HackTool[Obfuscator]/MSIL.DeepSea
Link:
https://www.hybrid-analysis.com/sample/33a8c3e40fddaad6562484999ff394278be8b5310591a73bcd01573354dd20d5
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/cf547b12-53db-44c7-802b-393543b4699c
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1648731
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
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
Found malware configuration
Injects a PE file into a foreign processes
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
Suricata IDS alerts for network traffic
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1648731 Sample: rVGM-so_7207S04.scr.exe Startdate: 26/03/2025 Architecture: WINDOWS Score: 100 54 geoplugin.net 2->54 66 Suricata IDS alerts for network traffic 2->66 68 Found malware configuration 2->68 70 Malicious sample detected (through community Yara rule) 2->70 72 9 other signatures 2->72 10 rVGM-so_7207S04.scr.exe 3 2->10         started        14 wsp.exe 2 2->14         started        16 wsp.exe 2 2->16         started        18 wsp.exe 2->18         started        signatures3 process4 file5 52 C:\Users\user\...\rVGM-so_7207S04.scr.exe.log, ASCII 10->52 dropped 86 Contains functionality to bypass UAC (CMSTPLUA) 10->86 88 Contains functionalty to change the wallpaper 10->88 90 Contains functionality to steal Chrome passwords or cookies 10->90 94 2 other signatures 10->94 20 rVGM-so_7207S04.scr.exe 2 4 10->20         started        24 rVGM-so_7207S04.scr.exe 10->24         started        92 Injects a PE file into a foreign processes 14->92 26 wsp.exe 14->26         started        28 wsp.exe 16->28         started        30 wsp.exe 18->30         started        signatures6 process7 file8 48 C:\ProgramData\WSP\wsp.exe, PE32 20->48 dropped 50 C:\ProgramData\WSP\wsp.exe:Zone.Identifier, ASCII 20->50 dropped 78 Creates autostart registry keys with suspicious names 20->78 32 wsp.exe 3 20->32         started        signatures9 process10 signatures11 60 Antivirus detection for dropped file 32->60 62 Multi AV Scanner detection for dropped file 32->62 64 Injects a PE file into a foreign processes 32->64 35 wsp.exe 4 14 32->35         started        process12 dnsIp13 56 104.250.180.178, 49713, 49717, 7902 M247GB United States 35->56 58 geoplugin.net 178.237.33.50, 49718, 80 ATOM86-ASATOM86NL Netherlands 35->58 74 Writes to foreign memory regions 35->74 76 Maps a DLL or memory area into another process 35->76 39 recover.exe 35->39         started        42 recover.exe 35->42         started        44 recover.exe 14 35->44         started        46 recover.exe 35->46         started        signatures14 process15 signatures16 80 Tries to steal Instant Messenger accounts or passwords 39->80 82 Tries to steal Mail credentials (via file / registry access) 39->82 84 Tries to harvest and steal browser information (history, passwords, etc) 42->84
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/33a8c3e40fddaad6562484999ff394278be8b5310591a73bcd01573354dd20d5
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/33a8c3e40fddaad6562484999ff394278be8b5310591a73bcd01573354dd20d5/
Threat name:
Win32.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-03-26 05:32:14 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
21 of 24 (87.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=goumhzap3wvnmvreqsmz744ue6f6rnjrawi2oo6nafltgvg5edkq._file
Verdict:
malicious
Label(s):
unc_loader_037
Create hunting rule
remcos
Create hunting rule
admintool_bulletpassview
Create hunting rule
Similar samples:
2e4a8adeb10758473cd1d42e9869ee03840016814c6cfc0465303b19afaca46f
RemcosRAT
33a8c3e40fddaad6562484999ff394278be8b5310591a73bcd01573354dd20d5
RemcosRAT
4cfc84d46074142fa3204777ac1a0cbd7ea155fcaf0739388df5d098abf8d7f4
RemcosRAT
88d5346489cca6b4114b60889108d286c46144507e2011081e0c7080eeb18d03
RemcosRAT
ad4e305243eea4eb48308ce4bccd6b999ed93f9810a82236987187fda9e12de1
RemcosRAT
b2ad15205bc0385eacc9412fbc35639de0d5ecce1b045770cbcc584b41371c0d
RemcosRAT
d7bc6079ee97a1977556f37fdbe89f064ad7bf206448058588a109902bd08ac0
RemcosRAT
e0ddedaa06761076b5647d0a26e2193602cd1136b71c130a0c06542f39464183
RemcosRAT
eff7f07d562a0a4bdf9f94f60048996671b6b9092e695b45c835e5035f531d23
RemcosRAT
error
RemcosRAT
f777dd41f5ab3c306874f9f9548629f6767ec0ea8b942c9c60103dd4956604f2
RemcosRAT
+ 704 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost collection discovery persistence rat
Link:
https://tria.ge/reports/250326-f8ce7a1ps4/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Remcos
Remcos family
Malware Config
C2 Extraction:
104.250.180.178:7902
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/486cebc3-6783-4294-929c-9b2b2b4175d0
Unpacked files
SH256 hash:
33a8c3e40fddaad6562484999ff394278be8b5310591a73bcd01573354dd20d5
MD5 hash:
0d0f42c9c2415cf03216a0dfb988eab5
SHA1 hash:
8d44394862a6f6f154f182ec53a35d40b79a4dad
Link:
https://www.unpac.me/results/b9b74a41-1e79-466d-9308-cfacac9bafda/
SH256 hash:
f2fef1c3725c58a1a37dcf42be297f815557867bae275f7f652a783ceb4bded7
MD5 hash:
1335f0dcf18e5a10333de1f92009e5cc
SHA1 hash:
4c0817196b2ae4fbceb4ce0949a9f8a7da3b9852
Link:
https://www.unpac.me/results/b9b74a41-1e79-466d-9308-cfacac9bafda/
SH256 hash:
f6a1a48142e71410ea3b2665cb253713dff56bd21af6180d9c9094947c4b9c8f
MD5 hash:
e2511446137eaaaef3ae3a2cabd9ac5f
SHA1 hash:
a244b12791c29b98e9cd52a67d8f5b1fe0b67fc6
Detections:
win_remcos_w0
Create hunting rule
win_remcos_auto
Create hunting rule
Remcos
Create hunting rule
malware_windows_remcos_rat
Create hunting rule
win_remcos_rat_unpacked
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Link:
https://www.unpac.me/results/b9b74a41-1e79-466d-9308-cfacac9bafda/
Parent samples :
f5478a5c7ac7dcb529af143345acd8aaaaa66b9cd92bcd38b645a5ded6c2f097
d7bc6079ee97a1977556f37fdbe89f064ad7bf206448058588a109902bd08ac0
33a8c3e40fddaad6562484999ff394278be8b5310591a73bcd01573354dd20d5
034d50a32f4d02f98159dfe1a44bcd3f87aea96af49340d516ed4a6e744929a3
d326515f14a0af4f4642d3f79806f8d8d75f4b310f3670ed6803f7dadd737279
SH256 hash:
7b1dc03b4eecccb5d4d12f8eda0e11c6f7aff288d64c80978e9564f483c5d865
MD5 hash:
e2e9c0894e7c5f626f63dcbf109c431d
SHA1 hash:
d66d2615fe95b3a45cfb328c37635365386202a8
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/b9b74a41-1e79-466d-9308-cfacac9bafda/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/33a8c3e40fdd/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/33a8c3e40fddaad6562484999ff394278be8b5310591a73bcd01573354dd20d5

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:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

File information

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

Malspam

RemcosRAT

Executable exe 33a8c3e40fddaad6562484999ff394278be8b5310591a73bcd01573354dd20d5

(this sample)

  
Delivery method
Distributed via e-mail attachment

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high

Comments