MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 25328100e347ae0ec386aefa4ca3f77291cc13f7e3d5f97f0e5a54ddd5ff4537. 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 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 25328100e347ae0ec386aefa4ca3f77291cc13f7e3d5f97f0e5a54ddd5ff4537
SHA3-384 hash: 574c37381af7edfdee9208ccff0e9ada468073eb94ea06825bb463ffa653fb9a048537242bd9e4e7f3c838451ddee222
SHA1 hash: afc9ad92c337ba2c527018b26cce1a16bfe92325
MD5 hash: 8c25fa9ce44c79d06b530d7b5af2472a
humanhash: montana-lithium-arkansas-maryland
File name:Uduknnywyznljn.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'067'008 bytes
First seen:2024-08-01 12:15:09 UTC
Last seen:2024-08-01 13:31:52 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash ce937e16bd6b7769cc007fd2c50e5be4 (1 x RemcosRAT, 1 x Formbook, 1 x DBatLoader)
ssdeep 12288:ZQNSFiC5rA0VvTwfwKV2LPCC7+8n7g6m3taBewapo7RLxCN8PtkZ6EQd7LmA0Ava:SoZrA0Vwft2LCCqe06mdeAo7BkgE6mD
TLSH T120358D21B3858A36C23610738B3EDFEBF81D2DB41B2874A527F62E582A25391355F753
TrID 30.5% (.SCR) Windows screen saver (13097/50/3)
24.5% (.EXE) Win64 Executable (generic) (10523/12/4)
15.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
10.5% (.EXE) Win32 Executable (generic) (4504/4/1)
4.8% (.EXE) Win16/32 Executable Delphi generic (2072/23)
File icon (PE):PE icon
dhash icon 78f2d4c4dcd4ccd4 (3 x DBatLoader, 2 x RemcosRAT, 1 x Formbook)
Reporter threatcat_ch
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
354
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
Uduknnywyznljn.exe
Verdict:
Malicious activity
Analysis date:
2024-08-01 12:15:58 UTC
Tags:
remcos rat evasion keylogger
Link:
https://app.any.run/tasks/3331e946-a9bf-4c22-8936-fe3c807a1cf8

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66ab7c86037b02d0daecee70
Tags:
Execution Generic Network Static Stealth Nekark
Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Creating a window
DNS request
Connection attempt
Sending a custom TCP request
Sending an HTTP GET request
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
borland_delphi fingerprint keylogger
Link:
https://www.filescan.io/uploads/66ab7c95dfa8b2fced50b780/reports/64a2ff34-c131-407e-8dee-f6542afeca8a/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_70%
Link:
https://www.hybrid-analysis.com/sample/25328100e347ae0ec386aefa4ca3f77291cc13f7e3d5f97f0e5a54ddd5ff4537
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/f6517dca-954a-471e-9697-92ac5769e81e
Result
Threat name:
Remcos, DBatLoader
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1486007
Signature
AI detected suspicious sample
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
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
Delayed program exit found
Detected Remcos RAT
Drops or copies cmd.exe with a different name (likely to bypass HIPS)
Drops PE files to the user root directory
Drops PE files with a suspicious file extension
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Found malware configuration
Installs a global keyboard hook
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: DLL Search Order Hijackig Via Additional Space in Path
Sigma detected: Execution from Suspicious Folder
Sigma detected: Legitimate Application Dropped Executable
Sigma detected: New RUN Key Pointing to Suspicious Folder
Sigma detected: Remcos
Yara detected DBatLoader
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1486007 Sample: Uduknnywyznljn.exe Startdate: 01/08/2024 Architecture: WINDOWS Score: 100 40 www.newedums.com 2->40 42 newedums.com 2->42 44 2 other IPs or domains 2->44 52 Found malware configuration 2->52 54 Malicious sample detected (through community Yara rule) 2->54 56 Multi AV Scanner detection for submitted file 2->56 58 10 other signatures 2->58 8 Uduknnywyznljn.exe 4 22 2->8         started        13 Sdntmhue.PIF 2->13         started        15 Sdntmhue.PIF 2->15         started        signatures3 process4 dnsIp5 46 newedums.com 108.170.55.202, 443, 49721, 49722 SSASN2US United States 8->46 48 geoplugin.net 178.237.33.50, 49726, 80 ATOM86-ASATOM86NL Netherlands 8->48 50 www.vandashproject.site 103.161.133.243, 2404, 49724 AARNET-AS-APAustralianAcademicandResearchNetworkAARNe unknown 8->50 34 C:\Users\Public\Sdntmhue.url, MS 8->34 dropped 36 C:\Users\Public\Libraries\Sdntmhue, data 8->36 dropped 38 C:\ProgramData\vandash\logs.dat, data 8->38 dropped 66 Detected Remcos RAT 8->66 68 Contains functionalty to change the wallpaper 8->68 70 Contains functionality to register a low level keyboard hook 8->70 78 3 other signatures 8->78 17 cmd.exe 1 8->17         started        19 esentutl.exe 2 8->19         started        72 Multi AV Scanner detection for dropped file 13->72 74 Contains functionality to bypass UAC (CMSTPLUA) 13->74 76 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 13->76 80 2 other signatures 13->80 file6 signatures7 process8 file9 22 esentutl.exe 2 17->22         started        26 conhost.exe 17->26         started        30 C:\Users\Public\Libraries\Sdntmhue.PIF, PE32 19->30 dropped 28 conhost.exe 19->28         started        process10 file11 32 C:\Users\Public\alpha.exe, PE32 22->32 dropped 60 Drops PE files to the user root directory 22->60 62 Drops PE files with a suspicious file extension 22->62 64 Drops or copies cmd.exe with a different name (likely to bypass HIPS) 22->64 signatures12
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/25328100e347ae0ec386aefa4ca3f77291cc13f7e3d5f97f0e5a54ddd5ff4537
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/25328100e347ae0ec386aefa4ca3f77291cc13f7e3d5f97f0e5a54ddd5ff4537/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2024-08-01 08:50:19 UTC
File Type:
PE (Exe)
Extracted files:
41
AV detection:
20 of 24 (83.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=euzicahdi6xa5q4gv35ezi7xoki4ye7x4pk7s7yoljkn3vp7iu3q._file
Verdict:
malicious
Result
Malware family:
modiloader
Create hunting rule
Score:
  10/10
Tags:
family:modiloader discovery trojan
Link:
https://tria.ge/reports/240801-pffrkszepr/
Behaviour
Script User-Agent
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
ModiLoader Second Stage
ModiLoader, DBatLoader
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/dfb6fbd6-709c-429b-9885-585a1b55835d
Unpacked files
SH256 hash:
7bcdc2e607abc65ef93afd009c3048970d9e8d1c2a18fc571562396b13ebb301
MD5 hash:
c116d3604ceafe7057d77ff27552c215
SHA1 hash:
452b14432fb5758b46f2897aeccd89f7c82a727d
Link:
https://www.unpac.me/results/5cb5e01e-004b-497d-9512-b3fca33627e8/
SH256 hash:
25328100e347ae0ec386aefa4ca3f77291cc13f7e3d5f97f0e5a54ddd5ff4537
MD5 hash:
8c25fa9ce44c79d06b530d7b5af2472a
SHA1 hash:
afc9ad92c337ba2c527018b26cce1a16bfe92325
Link:
https://www.unpac.me/results/5cb5e01e-004b-497d-9512-b3fca33627e8/
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/25328100e347ae0ec386aefa4ca3f77291cc13f7e3d5f97f0e5a54ddd5ff4537

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:BobSoftMiniDelphiBoBBobSoft
Create hunting rule
Author:malware-lu
Rule name:Borland
Create hunting rule
Author:malware-lu
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:Windows_Generic_Threat_0cc1481e
Create hunting rule
Author:Elastic Security

File information

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

Malspam

RemcosRAT

Executable exe 25328100e347ae0ec386aefa4ca3f77291cc13f7e3d5f97f0e5a54ddd5ff4537

(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_NXMissing Non-Executable Memory Protectioncritical
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh
Reviews
IDCapabilitiesEvidence
WIN32_PROCESS_APICan Create Process and Threadskernel32.dll::CloseHandle
kernel32.dll::CreateThread
WIN_BASE_APIUses Win Base APIkernel32.dll::LoadLibraryExA
kernel32.dll::LoadLibraryA
kernel32.dll::GetStartupInfoA
kernel32.dll::GetDiskFreeSpaceA
kernel32.dll::GetCommandLineA
WIN_BASE_IO_APICan Create Fileskernel32.dll::CreateFileA
kernel32.dll::FindFirstFileA
version.dll::GetFileVersionInfoSizeA
version.dll::GetFileVersionInfoA
WIN_REG_APICan Manipulate Windows Registryadvapi32.dll::RegOpenKeyExA
advapi32.dll::RegQueryValueExA
WIN_USER_APIPerforms GUI Actionsuser32.dll::ActivateKeyboardLayout
user32.dll::CreateMenu
user32.dll::FindWindowA
user32.dll::PeekMessageA
user32.dll::PeekMessageW
user32.dll::CreateWindowExA

Comments