MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 bb939a5d9535a87231e5a91e1f23121159c7bd6f38013a69d3313dda4a424f41. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: bb939a5d9535a87231e5a91e1f23121159c7bd6f38013a69d3313dda4a424f41
SHA3-384 hash: fd0480e0465205ba33c874c54273c7cca4d9487ae5cdb6529eeb4adb80f059ef87f1403e8c255f5422637d8819678b1d
SHA1 hash: 84b3fe357e4e5c312e411c654d20d81a65a54dda
MD5 hash: 742a768aa785a7bb86c1e8f3cd04bc7a
humanhash: muppet-helium-chicken-alaska
File name:PO#0416_SOLICITUD_DE_PRESUPUES_O_24_cotización_materialesxxx.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'398'784 bytes
First seen:2024-07-04 06:18:05 UTC
Last seen:2024-07-07 16:53:52 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'737 x AgentTesla, 19'596 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 24576:a5F0hmBDkZvdq+rixY/DFpNTvCkV0uf5ZmH1Ova3P01vUCwbi:ncI/XGxYFvCkCua1v35
TLSH T19855F10B37DE575CD1EE4A71B274057042B4AF5B1911A7AA7AD0EEFCDE3228E38015E2
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10523/12/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
File icon (PE):PE icon
dhash icon e2ee8a8eb6d8ecf4 (56 x AgentTesla, 39 x RemcosRAT, 38 x GuLoader)
Reporter abuse_ch
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
391
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
bb939a5d9535a87231e5a91e1f23121159c7bd6f38013a69d3313dda4a424f41.exe
Verdict:
Malicious activity
Analysis date:
2024-07-04 06:19:24 UTC
Tags:
darktortilla
Link:
https://app.any.run/tasks/343eca81-e765-4a5f-8a30-d4914b7ff70a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Dropper.Nanocore-10025009-0
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66863f7894b35ad6fbebbd54win10vpnfull_triage
Tags:
Execution Generic Network Remcos
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Running batch commands
Launching a process
Creating a file
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/bb939a5d9535a87231e5a91e1f23121159c7bd6f38013a69d3313dda4a424f41
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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/1e87f577-34ef-4c1e-b188-561dc0bc2f32
Result
Threat name:
DarkTortilla, Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1467416
Signature
.NET source code contains method to dynamically call methods (often used by packers)
AI detected suspicious sample
C2 URLs / IPs found in malware configuration
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Initial sample is a PE file and has a suspicious name
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
Uses ping.exe to check the status of other devices and networks
Uses ping.exe to sleep
Yara detected AntiVM3
Yara detected DarkTortilla Crypter
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1467416 Sample: PO#0416_SOLICITUD_DE_PRESUP... Startdate: 04/07/2024 Architecture: WINDOWS Score: 100 50 Multi AV Scanner detection for domain / URL 2->50 52 Found malware configuration 2->52 54 Malicious sample detected (through community Yara rule) 2->54 56 10 other signatures 2->56 10 PO#0416_SOLICITUD_DE_PRESUPUES_O_24_cotizaci#U00f3n_materialesxxx.exe 3 2->10         started        process3 file4 42 PO#0416_SOLICITUD_...terialesxxx.exe.log, ASCII 10->42 dropped 64 Hides that the sample has been downloaded from the Internet (zone.identifier) 10->64 14 cmd.exe 3 10->14         started        18 cmd.exe 1 10->18         started        signatures5 process6 file7 44 C:\Users\user\AppData\...\Vexploress.exe, PE32 14->44 dropped 46 C:\Users\...\Vexploress.exe:Zone.Identifier, ASCII 14->46 dropped 66 Uses ping.exe to sleep 14->66 20 Vexploress.exe 3 4 14->20         started        23 conhost.exe 14->23         started        25 PING.EXE 1 14->25         started        27 PING.EXE 1 14->27         started        68 Uses ping.exe to check the status of other devices and networks 18->68 29 PING.EXE 1 18->29         started        32 conhost.exe 18->32         started        34 reg.exe 1 1 18->34         started        signatures8 process9 dnsIp10 58 Multi AV Scanner detection for dropped file 20->58 60 Machine Learning detection for dropped file 20->60 62 Hides that the sample has been downloaded from the Internet (zone.identifier) 20->62 36 Acrobat.exe 53 20->36         started        48 127.0.0.1 unknown unknown 29->48 signatures11 process12 process13 38 AcroCEF.exe 103 36->38         started        process14 40 AcroCEF.exe 38->40         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/bb939a5d9535a87231e5a91e1f23121159c7bd6f38013a69d3313dda4a424f41
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/bb939a5d9535a87231e5a91e1f23121159c7bd6f38013a69d3313dda4a424f41/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2024-07-03 21:09:30 UTC
File Type:
PE (.Net Exe)
Extracted files:
43
AV detection:
24 of 24 (100.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xojzuxmvgwuhempfvepb6iyscfm4pplphaatu2otge65usscj5aq._file
Verdict:
malicious
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:mexico persistence rat
Link:
https://tria.ge/reports/240704-g26wwsyblr/
Behaviour
Checks processor information in registry
Modifies Internet Explorer settings
Modifies registry class
Runs ping.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Remcos
Malware Config
C2 Extraction:
64.188.26.202:1604
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/9b3bbd67-c10b-43af-808d-da162b1a7812
Unpacked files
SH256 hash:
2db82e9b91b1ccb1957b4e06ec49bfb0096e973213fc1786de1bbe3162f5df5a
MD5 hash:
27dea42a70bd7e948f1171ce873878a1
SHA1 hash:
b87051d51479c093cdf3e721acea4fd8b940b1e5
Link:
https://www.unpac.me/results/3559643c-3c56-40a0-a20c-2f855d5c52c4/
SH256 hash:
86d945354bab17920af5600b08cdcb61a519c5117569c1029fe7671649224b32
MD5 hash:
3190d65d295cbf86e1c6fb7ae4790087
SHA1 hash:
43babf3072adbbed4d40eb4b034fd274f0ccb3ce
Detections:
Remcos
Create hunting rule
win_remcos_auto
Create hunting rule
win_remcos_w0
Create hunting rule
malware_windows_remcos_rat
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Link:
https://www.unpac.me/results/3559643c-3c56-40a0-a20c-2f855d5c52c4/
SH256 hash:
bb939a5d9535a87231e5a91e1f23121159c7bd6f38013a69d3313dda4a424f41
MD5 hash:
742a768aa785a7bb86c1e8f3cd04bc7a
SHA1 hash:
84b3fe357e4e5c312e411c654d20d81a65a54dda
Link:
https://www.unpac.me/results/3559643c-3c56-40a0-a20c-2f855d5c52c4/
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/bb939a5d9535a87231e5a91e1f23121159c7bd6f38013a69d3313dda4a424f41

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

File information

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

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 (GUARD_CF)high

Comments