Analysis
-
max time kernel
160s -
max time network
177s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
30-11-2022 17:10
Behavioral task
behavioral1
Sample
500012d50571ffd0bf7d79d93fba3148f1c00771511ca7c41a45cfd20003c660.exe
Resource
win7-20221111-en
General
-
Target
500012d50571ffd0bf7d79d93fba3148f1c00771511ca7c41a45cfd20003c660.exe
-
Size
144KB
-
MD5
5c5239f80383a304a062139b3f95a831
-
SHA1
01c39b7f3ffa44ffc442e2dc54b53f023438f839
-
SHA256
500012d50571ffd0bf7d79d93fba3148f1c00771511ca7c41a45cfd20003c660
-
SHA512
4e46d9e8cd37e3d2f8c2fa6cbcdb22fd3380aee92566f4a50ece48260409ba278826e0d144c87c42668edd7dcb1b3841d5c6eda641a4546d76cfb5439df7cdba
-
SSDEEP
1536:occDTGzg/RnqyACg2uHtdDaxlrxdp9ABRhi6/rDRoKCt5t1Y+ugCiB:eDKzgpACg/7axlrxdQBfi6/rot5t4kB
Malware Config
Signatures
-
Drops file in System32 directory 4 IoCs
Processes:
scrnbulk.exedescription ioc process File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE scrnbulk.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies scrnbulk.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5 scrnbulk.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5 scrnbulk.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
-
Modifies data under HKEY_USERS 3 IoCs
Processes:
scrnbulk.exedescription ioc process Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix scrnbulk.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" scrnbulk.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" scrnbulk.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
scrnbulk.exepid process 4728 scrnbulk.exe 4728 scrnbulk.exe 4728 scrnbulk.exe 4728 scrnbulk.exe 4728 scrnbulk.exe 4728 scrnbulk.exe -
Suspicious behavior: RenamesItself 1 IoCs
Processes:
500012d50571ffd0bf7d79d93fba3148f1c00771511ca7c41a45cfd20003c660.exepid process 4160 500012d50571ffd0bf7d79d93fba3148f1c00771511ca7c41a45cfd20003c660.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
500012d50571ffd0bf7d79d93fba3148f1c00771511ca7c41a45cfd20003c660.exescrnbulk.exedescription pid process target process PID 2020 wrote to memory of 4160 2020 500012d50571ffd0bf7d79d93fba3148f1c00771511ca7c41a45cfd20003c660.exe 500012d50571ffd0bf7d79d93fba3148f1c00771511ca7c41a45cfd20003c660.exe PID 2020 wrote to memory of 4160 2020 500012d50571ffd0bf7d79d93fba3148f1c00771511ca7c41a45cfd20003c660.exe 500012d50571ffd0bf7d79d93fba3148f1c00771511ca7c41a45cfd20003c660.exe PID 2020 wrote to memory of 4160 2020 500012d50571ffd0bf7d79d93fba3148f1c00771511ca7c41a45cfd20003c660.exe 500012d50571ffd0bf7d79d93fba3148f1c00771511ca7c41a45cfd20003c660.exe PID 4156 wrote to memory of 4728 4156 scrnbulk.exe scrnbulk.exe PID 4156 wrote to memory of 4728 4156 scrnbulk.exe scrnbulk.exe PID 4156 wrote to memory of 4728 4156 scrnbulk.exe scrnbulk.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\500012d50571ffd0bf7d79d93fba3148f1c00771511ca7c41a45cfd20003c660.exe"C:\Users\Admin\AppData\Local\Temp\500012d50571ffd0bf7d79d93fba3148f1c00771511ca7c41a45cfd20003c660.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\500012d50571ffd0bf7d79d93fba3148f1c00771511ca7c41a45cfd20003c660.exe--4335f2d82⤵
- Suspicious behavior: RenamesItself
-
C:\Windows\SysWOW64\scrnbulk.exe"C:\Windows\SysWOW64\scrnbulk.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\scrnbulk.exe--b10923502⤵
- Drops file in System32 directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
memory/2020-132-0x0000000000580000-0x0000000000591000-memory.dmpFilesize
68KB
-
memory/2020-135-0x0000000000400000-0x0000000000414000-memory.dmpFilesize
80KB
-
memory/2020-134-0x0000000000580000-0x0000000000591000-memory.dmpFilesize
68KB
-
memory/4160-133-0x0000000000000000-mapping.dmp
-
memory/4160-136-0x0000000000400000-0x0000000000425000-memory.dmpFilesize
148KB
-
memory/4160-137-0x0000000000400000-0x0000000000425000-memory.dmpFilesize
148KB
-
memory/4160-139-0x0000000000400000-0x0000000000414000-memory.dmpFilesize
80KB
-
memory/4728-138-0x0000000000000000-mapping.dmp
-
memory/4728-140-0x0000000000400000-0x0000000000425000-memory.dmpFilesize
148KB
-
memory/4728-141-0x0000000000400000-0x0000000000425000-memory.dmpFilesize
148KB