MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 21b895bddca92e3443bf32f96d3c2c740be863944ed1c78a41a7caf36ea8f2a7. 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: 17


Intelligence 17 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 21b895bddca92e3443bf32f96d3c2c740be863944ed1c78a41a7caf36ea8f2a7
SHA3-384 hash: 20a735cfdcf568329324462671bb24c782a740d5e5d77b91566756b31fc2237ace93932a526a6c2a4664b9cd31e816f9
SHA1 hash: 8867965f36d645c501d77c01db61953a3c8bb0fc
MD5 hash: 71c0d799bdfb0f03358735840e907d49
humanhash: thirteen-emma-single-four
File name:SKM_C36825042817876756464534576898090-997867564534243545678766434235480.scr
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'065'984 bytes
First seen:2025-04-29 06:39:07 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'452 x Formbook, 12'201 x SnakeKeylogger)
ssdeep 24576:/LCGyplU6b58Lx9GwLyPokcqjbQprN2U6OG:/ylU6N8Lx90AxqjsH
TLSH T1953512596248F50BE9AA1B785B71F274237D2CDE7441E61A4FEA3CFF39B5A010C19283
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
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)
Magika pebin
Reporter threatcat_ch
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
473
Origin country :
CH CH
Vendor Threat Intelligence
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/4936/
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68107968cc5fb3600cc45487
Tags:
packed micro spawn lien
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
Searching for synchronization primitives
Reading critical registry keys
Creating a file in the %temp% directory
Launching the default Windows debugger (dwwin.exe)
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
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
entropy masquerade obfuscated packed packed packer_detected
Link:
https://www.filescan.io/uploads/6810741246fe05453ca99fc4/reports/4c371582-23b9-4a7c-8d42-fbf7ff45c45f/overview
Verdict:
Malicious
Labled as:
Genie8DN.Generic
Link:
https://www.hybrid-analysis.com/sample/21b895bddca92e3443bf32f96d3c2c740be863944ed1c78a41a7caf36ea8f2a7
Malware family:
REMCOS
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/5a0443fc-9ab6-4cf0-a273-e8430d5b637c
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/1677032
Signature
.NET source code contains potential unpacker
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
Delayed program exit found
Drops executable to a common third party application directory
Found malware configuration
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
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)
Tries to steal Mail credentials (via file registry)
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: 1677032 Sample: SKM_C3682504281787675646453... Startdate: 29/04/2025 Architecture: WINDOWS Score: 100 51 geoplugin.net 2->51 61 Suricata IDS alerts for network traffic 2->61 63 Found malware configuration 2->63 65 Malicious sample detected (through community Yara rule) 2->65 67 8 other signatures 2->67 11 SKM_C36825042817876756464534576898090-997867564534243545678766434235480.scr.exe 3 2->11         started        15 Adobe.exe 2 2->15         started        signatures3 process4 file5 49 SKM_C3682504281787...4235480.scr.exe.log, ASCII 11->49 dropped 81 Contains functionality to bypass UAC (CMSTPLUA) 11->81 83 Contains functionalty to change the wallpaper 11->83 85 Contains functionality to steal Chrome passwords or cookies 11->85 89 3 other signatures 11->89 17 SKM_C36825042817876756464534576898090-997867564534243545678766434235480.scr.exe 2 4 11->17         started        21 SKM_C36825042817876756464534576898090-997867564534243545678766434235480.scr.exe 11->21         started        87 Injects a PE file into a foreign processes 15->87 23 Adobe.exe 15->23         started        25 Adobe.exe 15->25         started        signatures6 process7 file8 45 C:\ProgramData\Adobe\Adobe.exe, PE32 17->45 dropped 47 C:\ProgramData\...\Adobe.exe:Zone.Identifier, ASCII 17->47 dropped 57 Creates autostart registry keys with suspicious names 17->57 59 Drops executable to a common third party application directory 17->59 27 Adobe.exe 3 17->27         started        signatures9 process10 signatures11 75 Multi AV Scanner detection for dropped file 27->75 77 Tries to steal Mail credentials (via file registry) 27->77 79 Injects a PE file into a foreign processes 27->79 30 Adobe.exe 3 14 27->30         started        34 Adobe.exe 27->34         started        process12 dnsIp13 53 104.250.180.178, 49681, 49682, 7902 M247GB United States 30->53 55 geoplugin.net 178.237.33.50, 49683, 80 ATOM86-ASATOM86NL Netherlands 30->55 91 Maps a DLL or memory area into another process 30->91 36 Adobe.exe 1 30->36         started        39 Adobe.exe 14 30->39         started        41 Adobe.exe 30->41         started        signatures14 process15 signatures16 69 Tries to steal Instant Messenger accounts or passwords 36->69 71 Tries to steal Mail credentials (via file / registry access) 36->71 73 Tries to harvest and steal browser information (history, passwords, etc) 39->73 43 WerFault.exe 21 18 41->43         started        process17
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/21b895bddca92e3443bf32f96d3c2c740be863944ed1c78a41a7caf36ea8f2a7
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/21b895bddca92e3443bf32f96d3c2c740be863944ed1c78a41a7caf36ea8f2a7/
Threat name:
Win32.Trojan.Egairtigado
Create hunting rule
Status:
Malicious
First seen:
2025-04-29 06:03:49 UTC
AV detection:
18 of 24 (75.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=eg4jlpo4vexdiq57gl4w2pbmoqf6qy4uj3i4pcsbu7fpg3vi6ktq._file
Verdict:
malicious
Label(s):
nirsoft
Create hunting rule
unc_loader_037
Create hunting rule
remcos
Create hunting rule
Similar samples:
error
RemcosRAT
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost collection discovery persistence rat spyware stealer
Link:
https://tria.ge/reports/250429-hep6asyjz2/
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
Reads user/profile data of web browsers
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/974c9039-05fe-4948-8091-65f7ffe0425d
Unpacked files
SH256 hash:
21b895bddca92e3443bf32f96d3c2c740be863944ed1c78a41a7caf36ea8f2a7
MD5 hash:
71c0d799bdfb0f03358735840e907d49
SHA1 hash:
8867965f36d645c501d77c01db61953a3c8bb0fc
Link:
https://www.unpac.me/results/eacdf861-4f93-4d3b-b7cf-7016cd36790f/
SH256 hash:
3a2a11d82360ff85bf29b6d18981ed35d8b31f9872065b11f326752ab36e09f0
MD5 hash:
33badcea18fda32920de5ab49dcc3f9c
SHA1 hash:
015d5191a9a4b775075f0a900108295dafa3b2ae
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/eacdf861-4f93-4d3b-b7cf-7016cd36790f/
SH256 hash:
c09e0e64718e1b45af19885feddc86f902bc18cb5fa5e64dade87ee1c4f0f3f2
MD5 hash:
2e4fe6630c31bbf4ad9558dbdb64ae4d
SHA1 hash:
030852dcab9532308aefb31b1b719416c5840d24
Link:
https://www.unpac.me/results/eacdf861-4f93-4d3b-b7cf-7016cd36790f/
SH256 hash:
5f54f1bec9ba28b84b92478b3db46235c07fa7b4fb106111dd68e4af94afcea3
MD5 hash:
e3f85d3db1a13a521b6dd6477298f9c5
SHA1 hash:
3f40142ffa5a2093a864446af3b80e0fb03f3bfd
Detections:
win_remcos_w0
Create hunting rule
win_remcos_auto
Create hunting rule
Remcos
Create hunting rule
malware_windows_remcos_rat
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
win_remcos_rat_unpacked
Create hunting rule
Link:
https://www.unpac.me/results/eacdf861-4f93-4d3b-b7cf-7016cd36790f/
Parent samples :
aa5728008a7a4b1173fc74eb5e41666688baddefbb2d5214d46cd6815646b5f3
9b9ba6e3df79c2acd5ecdb46d3fb5f4828bcad17b899841fda48bef82f7ab1a1
70ee8c0d07ceccded841b84da618617ffade6266373de9470d14c27a67042ea6
524c637935103ad405e691fd652910fd2d7aab643348818a30b86ee24f3e70b0
561070b0ac5bfae16de4f01cbfc6fbf6b40d3afd5413de4c2abf8c844e7e9fe4
1b754a8b7d0c1d3be17f751d327b38961c3d6ea3b8769c9c8edb1f318dfd0787
6b21cf5ebc20615576167925b27adad49dd095dbca80a7a47101fa824295057c
d3ab0c4ddfbdbce6b1f200436de1c9d1f94567b06a420dc453d02460452cebca
79b1315cab839553008486cf182981ce0a36c1755a83e37f7b107cdb7266f0cb
5e3a1a463e8db9ecffcce81fcd53169562dc8dc0e8974e09376639aaef0e61ae
9c1dd67562324157ceab4d8e050c84150afc6ddff6aec72206ab437c31aac7bb
d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab
ae72b0b7e4c361d0016ed97ac0664e0c8f3d31dd9627c993b635b5fac24d7255
2c5f8cf6008b32d8845093b44852f6fbd1c2be8ec1ae5fa4e01e8d81d7e42929
5f54f1bec9ba28b84b92478b3db46235c07fa7b4fb106111dd68e4af94afcea3
7a9e36961ab5b2ab759ec2196d40618b1f43c5a04c40c01b31cfb4ea1adfc347
c51201337af75df4850b5392117e54eedfa2f1ac133e891947ece8102cdda0d0
b2a1e0e508be9c7546a8af45c72f2032f067ac036f03ec0c8309b368b195a65c
0ffd61040c88e3beb1cd998b777cbbe118f52daa4eb2759cd9329de5d7f2adc4
769cba836f991b58e8f70ebecb20c4e34fc5e1d1fc7c031b8fc704f43676d83a
21b895bddca92e3443bf32f96d3c2c740be863944ed1c78a41a7caf36ea8f2a7
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/21b895bddca9/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/21b895bddca92e3443bf32f96d3c2c740be863944ed1c78a41a7caf36ea8f2a7

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 21b895bddca92e3443bf32f96d3c2c740be863944ed1c78a41a7caf36ea8f2a7

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/4936/

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