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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1a77b488a1800828543b6983bbb531e06bd95b00ea26bc2eeb2994e0f2f60236. 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: 14


Intelligence 14 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 1a77b488a1800828543b6983bbb531e06bd95b00ea26bc2eeb2994e0f2f60236
SHA3-384 hash: 4b7d0f64e5cc65f2f3ffbdce7564c33dba2d0e46e94d538fe0f59e71e5e40eb8ea472d8866e02a55011c732667dac203
SHA1 hash: 51cce01f38c0199e8479caf757919b22de86e3b2
MD5 hash: e60a53e87f4f3185b5d64b8f29d09e02
humanhash: friend-harry-quiet-massachusetts
File name:docs917221433.bat
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'061'058 bytes
First seen:2025-04-23 03:57:38 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash b34f154ec913d2d2c435cbd644e91687 (593 x GuLoader, 130 x RemcosRAT, 85 x EpsilonStealer)
ssdeep 12288:nBVdH/vKsFGF3/NCAC7+tVQQqM8HaKl6wLWgJTXrbEusK3sEMkwCp0KD:BnLWv87+RMaKvLWsk0kkRlD
TLSH T19135F1905568C727C4832FB4C052F7F9CE616DD5E512C213A9E6FC0BB87A693ED00ADA
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 f00f21b4c4611541 (7 x GuLoader, 4 x RemcosRAT)
Reporter threatcat_ch
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
466
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
db357e365b705eef99ccd839097c5e8a7889b46d653673ab717885da4ac0e65f
Verdict:
Malicious activity
Analysis date:
2025-04-23 03:41:35 UTC
Tags:
arch-exec rat remcos remote
Link:
https://app.any.run/tasks/6d8c0ed7-dbe6-439e-9ac5-20ce77284eee

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/3563/
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6808616e3d067f84839834e5
Tags:
injection obfusc virus nsis
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file in the %temp% subdirectories
Searching for the window
Delayed reading of the file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
adaptive-context blackhole installer masquerade microsoft_visual_cc overlay overlay packed packer_detected
Link:
https://www.filescan.io/uploads/68086553e9c1e25797a030af/reports/ecdf7064-2165-4cd9-89e8-80c5f2a52278/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_70%
Link:
https://www.hybrid-analysis.com/sample/1a77b488a1800828543b6983bbb531e06bd95b00ea26bc2eeb2994e0f2f60236
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/757ff740-58d1-444c-a165-86c2c09b55f9
Result
Threat name:
Remcos, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1671637
Signature
C2 URLs / IPs found in malware configuration
Detected Remcos RAT
Found malware configuration
Installs a global keyboard hook
Multi AV Scanner detection for submitted file
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
Yara detected GuLoader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
Score:
97%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/1a77b488a1800828543b6983bbb531e06bd95b00ea26bc2eeb2994e0f2f60236
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/1a77b488a1800828543b6983bbb531e06bd95b00ea26bc2eeb2994e0f2f60236/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2025-04-23 02:46:26 UTC
File Type:
PE (Exe)
Extracted files:
20
AV detection:
22 of 38 (57.89%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=dj33jcfbqaecqvb3ngb3xnjr4bv5swya5itlylxlfgkob4xwai3a._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:guloader family:remcos botnet:bn@remy discovery downloader rat
Link:
https://tria.ge/reports/250423-ejk6cswwbv/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Legitimate hosting services abused for malware hosting/C2
Loads dropped DLL
Guloader family
Guloader,Cloudeye
Remcos
Remcos family
Malware Config
C2 Extraction:
196.251.116.190:2404
196.251.116.190:2004
196.251.116.190:4507
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/bccdebdf-ff4f-4160-8ba5-cd512b36609b
Unpacked files
SH256 hash:
1a77b488a1800828543b6983bbb531e06bd95b00ea26bc2eeb2994e0f2f60236
MD5 hash:
e60a53e87f4f3185b5d64b8f29d09e02
SHA1 hash:
51cce01f38c0199e8479caf757919b22de86e3b2
Link:
https://www.unpac.me/results/28d27af3-60db-4119-a240-75d4ffc470f6/
SH256 hash:
f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37
MD5 hash:
8b3830b9dbf87f84ddd3b26645fed3a0
SHA1 hash:
223bef1f19e644a610a0877d01eadc9e28299509
Link:
https://www.unpac.me/results/28d27af3-60db-4119-a240-75d4ffc470f6/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/1a77b488a180/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/1a77b488a1800828543b6983bbb531e06bd95b00ea26bc2eeb2994e0f2f60236

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: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 1a77b488a1800828543b6983bbb531e06bd95b00ea26bc2eeb2994e0f2f60236

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/3563/

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
ADVAPI32.dll::SetFileSecurityW
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::MoveFileExW
KERNEL32.dll::MoveFileW
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

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