MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8c1a72991fb04dc3a8cf89605fb85150ef0e742472a0c58b8fa942a1f04877b0. 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


NightSky


Vendor detections: 7


Intelligence 7 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8c1a72991fb04dc3a8cf89605fb85150ef0e742472a0c58b8fa942a1f04877b0
SHA3-384 hash: 7cc8b16c17f063be22de7e808944cfef4471d3c33893db51c99296c6e516376d0e79f5b8c680da8ebff283cb12dad150
SHA1 hash: 37b11d3d7b7a1d18daafd6c63b33526860aaefe6
MD5 hash: 9608c8b6c8d80fdc67b99edd3c53d3d2
humanhash: helium-item-crazy-robert
File name:update.exe
Download: download sample
Signature NightSky
Create hunting rule
File size:5'945'856 bytes
First seen:2022-01-06 12:59:59 UTC
Last seen:2022-01-08 06:47:36 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash d9335d46ba7ec00ed7f9cc1bc2720cc8 (2 x NightSky)
ssdeep 98304:7iTgMQwfZtqifsjEiwkA+DUg47V6pH/LZAtpla02dK70xioBqOy:7SBttRiA+4GJtAZa088h
TLSH T1DF5612FE21483318C41ECD349423AD59B1F6651A0BB99669B9EBFFC06F5F850EA12F01
Reporter fbgwls245
Tags:exe NightSky Ransomware

Intelligence

File Origin
# of uploads :
5
# of downloads :
464
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
update.exe
Verdict:
No threats detected
Analysis date:
2022-01-06 13:02:32 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/56e29630-e48c-4e44-a45a-0a69105670ff

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/217566/
Detection(s):
SecuriteInfo.com.Trojan-Ransom.Win32.Encoder.pcn.11732.27726.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Creating a file
Changing a file
DNS request
Creating a file in the Program Files subdirectories
Creating a file in the mass storage device
Encrypting user's files
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/61d6e7db1c0d769df9d30497/reports/621ad53e-2e69-4967-b82c-190320262fd2/overview
Result
Verdict:
UNKNOWN
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/a5e98230-b164-4f81-94af-131dd4264a02
Result
Threat name:
NightSky
Create hunting rule
Detection:
malicious
Classification:
rans.evad
Score:
84 / 100
Link:
https://www.joesandbox.com/analysis/916299
Signature
Creates HTA files
Machine Learning detection for sample
Modifies existing user documents (likely ransomware behavior)
Multi AV Scanner detection for submitted file
Overwrites code with unconditional jumps - possibly settings hooks in foreign process
Potential thread-based time evasion detected
Tries to detect virtualization through RDTSC time measurements
Writes many files with high entropy
Yara detected NightSky Ransomware
Behaviour
Behavior Graph:
Download SVG
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/8c1a72991fb04dc3a8cf89605fb85150ef0e742472a0c58b8fa942a1f04877b0/
Threat name:
Win64.Ransomware.NightSky
Create hunting rule
Status:
Malicious
First seen:
2022-01-05 22:43:34 UTC
File Type:
PE+ (Exe)
Extracted files:
1
AV detection:
15 of 28 (53.57%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=rqnhfgi7wbg4hkgprfqf7ocrkdxq45beokqmlc4pvfbkd4cio6ya._file
Verdict:
suspicious
Result
Malware family:
n/a
Score:
  8/10
Tags:
ransomware
Link:
https://tria.ge/reports/220106-p8nmwsbfcq/
Behaviour
Suspicious behavior: EnumeratesProcesses
Enumerates physical storage devices
Modifies extensions of user files
Unpacked files
SH256 hash:
8c1a72991fb04dc3a8cf89605fb85150ef0e742472a0c58b8fa942a1f04877b0
MD5 hash:
9608c8b6c8d80fdc67b99edd3c53d3d2
SHA1 hash:
37b11d3d7b7a1d18daafd6c63b33526860aaefe6
Link:
https://www.unpac.me/results/5d1e1eb3-639e-4323-9199-448b38a2b56b/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/8c1a72991fb0/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.61
Link:
https://yomi.yoroi.company/submissions/8c1a72991fb04dc3a8cf89605fb85150ef0e742472a0c58b8fa942a1f04877b0

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:CAS_Malware_Hunting
Create hunting rule
Author:Michael Reinprecht
Description:DEMO CAS YARA Rules for sample2.exe

File information

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

  
X
https://twitter.com/malwrhunterteam/status/1477381209147723788
Cape
Cape
https://www.capesandbox.com/analysis/217566/

Comments