8c1a72991fb04dc3a8cf89605fb85150ef0e742472a0c58b8fa942a1f04877b0

Analysis

max time kernel
25s
max time network
15s
platform
windows7_x64
resource
win7-en-20211208
submitted
06-01-2022 12:29

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General

Target

update.exe
Size

5.7MB
MD5

9608c8b6c8d80fdc67b99edd3c53d3d2
SHA1

37b11d3d7b7a1d18daafd6c63b33526860aaefe6
SHA256

8c1a72991fb04dc3a8cf89605fb85150ef0e742472a0c58b8fa942a1f04877b0
SHA512

4c98ff99686f2b54648c0926fbc1e92522520b11d1447a0fdf2aa11e25de2c109a0e55ae8f736404a3feed7288cb257cd57812ecdaeae41051a6ec3a0f6bfa15

Score

8^/10

ransomware

Malware Config

Signatures

Modifies extensions of user files 10 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

update.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\StartHide.crw => C:\Users\Admin\Pictures\StartHide.crw.nightsky	update.exe
File renamed	C:\Users\Admin\Pictures\ResolveInstall.png => C:\Users\Admin\Pictures\ResolveInstall.png.nightsky	update.exe
File opened for modification	C:\Users\Admin\Pictures\ResolveInstall.png.nightsky	update.exe
File renamed	C:\Users\Admin\Pictures\MeasureNew.tif => C:\Users\Admin\Pictures\MeasureNew.tif.nightsky	update.exe
File opened for modification	C:\Users\Admin\Pictures\ReadCompress.raw.nightsky	update.exe
File renamed	C:\Users\Admin\Pictures\ReadCompress.raw => C:\Users\Admin\Pictures\ReadCompress.raw.nightsky	update.exe
File opened for modification	C:\Users\Admin\Pictures\MeasureNew.tif.nightsky	update.exe
File opened for modification	C:\Users\Admin\Pictures\StartHide.crw.nightsky	update.exe
File renamed	C:\Users\Admin\Pictures\NewTrace.raw => C:\Users\Admin\Pictures\NewTrace.raw.nightsky	update.exe
File opened for modification	C:\Users\Admin\Pictures\NewTrace.raw.nightsky	update.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Modifies Internet Explorer settings 1 TTPs 1 IoCs
adware spyware

Modify Registry
T1112

Processes:

mshta.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Internet Explorer\Main mshta.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

update.exe

pid process

1620 update.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

mshta.exe

pid process

1332 mshta.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Internet Explorer\Main	mshta.exe

pid	process
1620	update.exe

pid	process
1332	mshta.exe

C:\Users\Admin\AppData\Local\Temp\update.exe
"C:\Users\Admin\AppData\Local\Temp\update.exe"
1⤵
- Modifies extensions of user files
- Suspicious behavior: EnumeratesProcesses
PID:1620

C:\Windows\SysWOW64\mshta.exe
"C:\Windows\SysWOW64\mshta.exe" "C:\Users\Admin\Desktop\NightSkyReadMe.hta"
1⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:1332

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\Desktop\NightSkyReadMe.hta
MD5
77271f4222f5c197f203d16052e09015

SHA1
c549b429ec037ff0e085dcee7b8ed636fc258f22

SHA256
29e255933d04e25882cca4d0be597b4eaa36ee729b62ca93fe4789b0283641e3

SHA512
1ecd1cc449fdfbbae5312988904bc8e0b2799fdf28ce902e9788320c94c60e7ecde1f5245c7e312a9e2e14d17db227b1a1dca0c94c7f670c4a8a0ecc22fd5a0d

Download Submit
memory/1620-54-0x000000013FC70000-0x00000001405C0000-memory.dmp

Filesize
9.3MB

Download
memory/1620-57-0x0000000077B90000-0x0000000077B92000-memory.dmp

Filesize
8KB

Download