MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c91ef21c66b7279fda58f15e32b4e563d39221d6f4b7c6e5bae0de7ca7a854a3. 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


MaskGramStealer


Vendor detections: 13


Intelligence 13 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c91ef21c66b7279fda58f15e32b4e563d39221d6f4b7c6e5bae0de7ca7a854a3
SHA3-384 hash: f315553c78e7f6a2ee57d0539c5ea6aa1d1cfc3fc28d75c998437bad2ee4299dcea5892653be9c70983c87182d527eae
SHA1 hash: 2a32d30cbb5ba226471d13aead30a9bbfc7b771b
MD5 hash: 64f8ec514f98ce055355ff64d792b31f
humanhash: friend-crazy-summer-ack
File name:file
Download: download sample
Signature MaskGramStealer
Create hunting rule
File size:9'742'336 bytes
First seen:2025-11-29 23:53:46 UTC
Last seen:2025-11-29 23:55:31 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 50273325e8c998c3212647a12deb8924 (1 x MaskGramStealer)
ssdeep 196608:cCD1JqMIZVyFxf02c/V6mwj3E75+SbiIGEhO4kzrmke9qt2:JfhBQ5TbV2rr
TLSH T1F9A6234F6BD4E3D8C083C730768A9A5AB0F0B9A657EE4B1D35CE38416930CB6570697B
TrID 44.4% (.EXE) Win64 Executable (generic) (10522/11/4)
21.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
8.7% (.ICL) Windows Icons Library (generic) (2059/9)
8.5% (.EXE) OS/2 Executable (generic) (2029/13)
8.4% (.EXE) Generic Win/DOS Executable (2002/3)
Magika pebin
Reporter Bitsight
Tags:dropped-by-amadey exe fbf543 MaskGramStealer


Avatar
Bitsight
url: http://178.16.55.189/files/5620802651/AOI0Njx.exe

Intelligence

File Origin
# of uploads :
2
# of downloads :
84
Origin country :
US US
Vendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
file
Verdict:
Malicious activity
Analysis date:
2025-11-29 23:56:17 UTC
Tags:
stealer svitstealer
Link:
https://app.any.run/tasks/1bdd050b-909b-4b63-ab29-75910503a25a

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/41871/
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=692b87a7f9fd2d5f941f098b
Tags:
virus remo
Result
Verdict:
Malware
Maliciousness:

Behaviour
DNS request
Connection attempt
Sending a custom TCP request
Behavior that indicates a threat
Connection attempt to an infection source
Query of malicious DNS domain
Sending a TCP request to an infection source
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-debug mingw obfuscated packed packed vmprotect
Link:
https://www.filescan.io/uploads/692b87a5d0d5e7288b50d21c/reports/8c547d2f-1558-45bf-ae8c-e1a77084dfbc/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/c91ef21c66b7279fda58f15e32b4e563d39221d6f4b7c6e5bae0de7ca7a854a3
Result
Gathering data
Verdict:
Unknown
File Type:
Link:
https://opentip.kaspersky.com/c91ef21c66b7279fda58f15e32b4e563d39221d6f4b7c6e5bae0de7ca7a854a3/results?tab=lookup
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/269421ab-1515-49ae-baba-df132d302b93
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/c91ef21c66b7279fda58f15e32b4e563d39221d6f4b7c6e5bae0de7ca7a854a3
Verdict:
inconclusive
YARA:
4 match(es)
Tags:
Executable PE (Portable Executable) PE File Layout Win 64 Exe x64
Link:
https://app.malva.re/file/64f8ec514f98ce055355ff64d792b31f
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c91ef21c66b7279fda58f15e32b4e563d39221d6f4b7c6e5bae0de7ca7a854a3/
Verdict:
Malicious
Threat:
Family.MASKGRAM_STEALER
Link:
https://tip.neiki.dev/file/c91ef21c66b7279fda58f15e32b4e563d39221d6f4b7c6e5bae0de7ca7a854a3
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=zeppehdgw4tz7wsy6fpdfnhfmpjzeiow6s34nzn24dphzj5iksrq._file
Verdict:
malicious
Label(s):
maskgramstealer
Create hunting rule
Similar samples:
error
MaskGramStealer
Result
Malware family:
maskgram_stealer
Create hunting rule
Score:
  10/10
Tags:
family:maskgram_stealer discovery spyware stealer
Link:
https://tria.ge/reports/251129-3xyklszjg1/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies data under HKEY_USERS
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Drops file in Program Files directory
Drops file in Windows directory
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Reads WinSCP keys stored on the system
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Detects MaskGramStealer payload
MaskGramStealer
Maskgram_stealer family
Malware Config
C2 Extraction:
easternwhiskerholdings.sbs
Verdict:
Suspicious
Tags:
Suspicious_POST_body
YARA:
n/a
Link:
https://app.threat.zone/submission/518b18b7-773c-46a3-b4fd-68a52849203b
Unpacked files
SH256 hash:
c91ef21c66b7279fda58f15e32b4e563d39221d6f4b7c6e5bae0de7ca7a854a3
MD5 hash:
64f8ec514f98ce055355ff64d792b31f
SHA1 hash:
2a32d30cbb5ba226471d13aead30a9bbfc7b771b
Link:
https://www.unpac.me/results/408e7047-e93f-4e2f-8e8c-4bb9b3fd4a7e/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c91ef21c66b7/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/c91ef21c66b7279fda58f15e32b4e563d39221d6f4b7c6e5bae0de7ca7a854a3

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:DebuggerCheck__RemoteAPI
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

File information

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

Web download

MaskGramStealer

Executable exe c91ef21c66b7279fda58f15e32b4e563d39221d6f4b7c6e5bae0de7ca7a854a3

(this sample)

  
Dropped by
Amadey
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3720736/
Cape
Cape
https://www.capesandbox.com/analysis/41871/

Comments