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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 28576297c4b38eef2dcecfd1f0eb97054e4bb973735c8b2df36273a75bfb8a0a. 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: 13


Intelligence 13 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 28576297c4b38eef2dcecfd1f0eb97054e4bb973735c8b2df36273a75bfb8a0a
SHA3-384 hash: 935511b7b515d0dc8f4398b7bb1356f2b8d784a8f2205225990c3d83533eb036ba963fc597b0a84162c61dd67f09d4c8
SHA1 hash: 48028e0f2ebcbb0df774871edf28fc3113764f82
MD5 hash: ccf41b86d1a9db20c55805fe7b0ba7c2
humanhash: nineteen-lactose-fish-ink
File name:SK-20250821.bat
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'005'735 bytes
First seen:2025-08-21 08:28:59 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 573bb7b41bc641bd95c0f5eec13c233b (66 x GuLoader, 32 x AgentTesla, 31 x RemcosRAT)
ssdeep 24576:ITAb6j/1rL5SgE9qUuIoBIfbikfMweeJIq8s6KYZCbUQl:up1LhEw7vITdMw0s6KoCPl
TLSH T147253308E65CAA53C17382714833973EC87DB699B23BA517EFB0A60AFD523D4EC05719
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10522/11/4)
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) (4504/4/1)
Magika pebin
dhash icon c4dadadad2f492c2 (148 x GuLoader, 51 x RemcosRAT, 23 x VIPKeylogger)
Reporter lowmal3
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
96
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SK-20250821.bat
Verdict:
Suspicious activity
Analysis date:
2025-08-21 09:08:04 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/e7f2e2f3-3bb4-4bc1-9585-b17bef878a93

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/22740/
Verdict:
Malicious
Score:
81.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68a6d8e88fd55a79c529ad54
Tags:
injection obfusc
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file
Creating a file in the %temp% subdirectories
Delayed reading of the file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-debug blackhole installer masquerade microsoft_visual_cc overlay overlay
Link:
https://www.filescan.io/uploads/68a6d8f0004f5721cb81e8de/reports/2e32ef7c-793f-468d-af03-bfa5ea4040de/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/28576297c4b38eef2dcecfd1f0eb97054e4bb973735c8b2df36273a75bfb8a0a
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/94a9cbe4-6c6e-4806-84eb-385d7decbe9d
Result
Threat name:
Remcos, GuLoader
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1761840
Signature
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Detected Remcos RAT
Found hidden mapped module (file has been removed from disk)
Found malware configuration
Joe Sandbox ML detected suspicious sample
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Opens the same file many times (likely Sandbox evasion)
Sigma detected: Remcos
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
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)
Tries to steal Mail credentials (via file registry)
Writes to foreign memory regions
Yara detected GuLoader
Yara detected Remcos RAT
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1761840 Sample: SK-20250821.bat.exe Startdate: 21/08/2025 Architecture: WINDOWS Score: 100 32 sactrucks-za.com 2->32 34 geoplugin.net 2->34 50 Suricata IDS alerts for network traffic 2->50 52 Found malware configuration 2->52 54 Antivirus detection for dropped file 2->54 56 8 other signatures 2->56 8 SK-20250821.bat.exe 2 30 2->8         started        signatures3 process4 file5 24 C:\Users\user\AppData\Local\...\System.dll, PE32 8->24 dropped 58 Found hidden mapped module (file has been removed from disk) 8->58 60 Tries to detect virtualization through RDTSC time measurements 8->60 62 Opens the same file many times (likely Sandbox evasion) 8->62 64 Switches to a custom stack to bypass stack traces 8->64 12 SK-20250821.bat.exe 4 16 8->12         started        signatures6 process7 dnsIp8 36 196.251.83.191, 2404, 49693, 49694 SONIC-WirelessZA Seychelles 12->36 38 sactrucks-za.com 206.168.149.2, 443, 49691 CENTURYLINK-US-LEGACY-QWESTUS United States 12->38 40 geoplugin.net 178.237.33.50, 49695, 80 ATOM86-ASATOM86NL Netherlands 12->40 26 C:\Users\user\AppData\Local\Temp\TH3F55.tmp, MS-DOS 12->26 dropped 28 C:\Users\user\AppData\Local\Temp\TH3F25.tmp, MS-DOS 12->28 dropped 30 C:\Users\user\AppData\Local\Temp\TH3F05.tmp, PE32 12->30 dropped 66 Detected Remcos RAT 12->66 68 Writes to foreign memory regions 12->68 70 Maps a DLL or memory area into another process 12->70 17 RmClient.exe 1 12->17         started        20 RmClient.exe 2 12->20         started        22 RmClient.exe 1 12->22         started        file9 signatures10 process11 signatures12 42 Tries to steal Instant Messenger accounts or passwords 17->42 44 Tries to steal Mail credentials (via file / registry access) 17->44 46 Tries to steal Mail credentials (via file registry) 20->46 48 Tries to harvest and steal browser information (history, passwords, etc) 20->48
Score:
98%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/28576297c4b38eef2dcecfd1f0eb97054e4bb973735c8b2df36273a75bfb8a0a
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable NSIS Installer PE (Portable Executable) PE File Layout Win 32 Exe x86
Link:
https://app.malva.re/file/ccf41b86d1a9db20c55805fe7b0ba7c2
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/28576297c4b38eef2dcecfd1f0eb97054e4bb973735c8b2df36273a75bfb8a0a/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/28576297c4b38eef2dcecfd1f0eb97054e4bb973735c8b2df36273a75bfb8a0a
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2025-08-21 04:27:10 UTC
File Type:
PE (Exe)
Extracted files:
7
AV detection:
23 of 38 (60.53%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=fblwff6ewoho6looz7i7b24xavhexoltonoiwlptmjz2ow73rifa._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:guloader family:remcos collection discovery downloader rat
Link:
https://tria.ge/reports/250821-kdsadahk6y/
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
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Loads dropped DLL
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Guloader family
Guloader,Cloudeye
Remcos
Remcos family
Malware Config
C2 Extraction:
196.251.83.191:2404
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/8652ae7a-9832-44d5-9e06-0782e72718bb
Unpacked files
SH256 hash:
28576297c4b38eef2dcecfd1f0eb97054e4bb973735c8b2df36273a75bfb8a0a
MD5 hash:
ccf41b86d1a9db20c55805fe7b0ba7c2
SHA1 hash:
48028e0f2ebcbb0df774871edf28fc3113764f82
Link:
https://www.unpac.me/results/8f03425b-e50b-4ac8-8793-8d6d97cc13c3/
SH256 hash:
8b4c47c4cf5e76ec57dd5a050d5acd832a0d532ee875d7b44f6cdaf68f90d37c
MD5 hash:
9b38a1b07a0ebc5c7e59e63346ecc2db
SHA1 hash:
97332a2ffcf12a3e3f27e7c05213b5d7faa13735
Link:
https://www.unpac.me/results/8f03425b-e50b-4ac8-8793-8d6d97cc13c3/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/28576297c4b3/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/28576297c4b38eef2dcecfd1f0eb97054e4bb973735c8b2df36273a75bfb8a0a

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:CP_AllMal_Detector
Create hunting rule
Author:DiegoAnalytics
Description:CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication
Rule name:Detect_NSIS_Nullsoft_Installer
Create hunting rule
Author:Obscurity Labs LLC
Description:Detects NSIS installers by .ndata section + NSIS header string
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 28576297c4b38eef2dcecfd1f0eb97054e4bb973735c8b2df36273a75bfb8a0a

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/22740/

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
Reviews
IDCapabilitiesEvidence
COM_BASE_APICan Download & Execute componentsole32.dll::CoCreateInstance
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AdjustTokenPrivileges
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteExW
SHELL32.dll::SHFileOperationW
SHELL32.dll::SHGetFileInfoW
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessW
ADVAPI32.dll::OpenProcessToken
KERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.dll::LoadLibraryExW
KERNEL32.dll::GetDiskFreeSpaceW
KERNEL32.dll::GetCommandLineW
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileW
KERNEL32.dll::CreateDirectoryW
KERNEL32.dll::CreateFileW
KERNEL32.dll::DeleteFileW
KERNEL32.dll::MoveFileW
KERNEL32.dll::MoveFileExW
WIN_BASE_USER_APIRetrieves Account InformationADVAPI32.dll::LookupPrivilegeValueW
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegCreateKeyExW
ADVAPI32.dll::RegDeleteKeyW
ADVAPI32.dll::RegOpenKeyExW
ADVAPI32.dll::RegQueryValueExW
ADVAPI32.dll::RegSetValueExW
WIN_USER_APIPerforms GUI ActionsUSER32.dll::AppendMenuW
USER32.dll::EmptyClipboard
USER32.dll::FindWindowExW
USER32.dll::OpenClipboard
USER32.dll::PeekMessageW
USER32.dll::CreateWindowExW

Comments