Analysis
-
max time kernel
153s -
max time network
60s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
04/10/2022, 04:06
Static task
static1
Behavioral task
behavioral1
Sample
a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
8 signatures
150 seconds
General
-
Target
a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe
-
Size
152KB
-
MD5
492f33f6ea403962a69837000859646a
-
SHA1
0f84f9ebb924e946353b1151b35258ccfbc83dd5
-
SHA256
a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d
-
SHA512
77e8d24e3872c04bce23349ee5701d59548ac5d11bc58d52c7e34aa5d12caf561ea65169d86101141cf8fc6c89439e0008b9ac208a10307cdd30284b450269b4
-
SSDEEP
3072:L32IpK9xKA9w2p4QZisLaazNiIIkyyqY4oQZiEZt:L39pKxY+1isuazgfkl/WZ
Score
10/10
Malware Config
Signatures
-
Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe Set value (int) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" caiyoa.exe -
Executes dropped EXE 1 IoCs
pid Process 944 caiyoa.exe -
Loads dropped DLL 2 IoCs
pid Process 1988 a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe 1988 a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe -
Adds Run key to start application 2 TTPs 53 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /M" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /v" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /m" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /g" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /T" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /f" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /o" a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /J" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /q" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /E" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /o" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /F" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /B" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /G" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /D" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /Q" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /n" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /Y" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /b" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /a" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /U" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /P" caiyoa.exe Key created \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\ caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /R" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /L" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /V" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /C" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /H" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /d" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /y" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /t" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /u" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /s" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /i" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /S" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /N" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /l" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /h" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /Z" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /w" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /I" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /r" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /e" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /A" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /k" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /z" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /j" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /p" caiyoa.exe Key created \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\ a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /O" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /c" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /K" caiyoa.exe Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\caiyoa = "C:\\Users\\Admin\\caiyoa.exe /X" caiyoa.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
-
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1988 a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe 944 caiyoa.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1988 a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe 944 caiyoa.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1988 wrote to memory of 944 1988 a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe 28 PID 1988 wrote to memory of 944 1988 a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe 28 PID 1988 wrote to memory of 944 1988 a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe 28 PID 1988 wrote to memory of 944 1988 a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe 28
Processes
-
C:\Users\Admin\AppData\Local\Temp\a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe"C:\Users\Admin\AppData\Local\Temp\a6456252a3bf90aa424e03324f88a1d7916584336f9ac7812a21631e99fb8e3d.exe"1⤵
- Modifies visiblity of hidden/system files in Explorer
- Loads dropped DLL
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1988 -
C:\Users\Admin\caiyoa.exe"C:\Users\Admin\caiyoa.exe"2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:944
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
152KB
MD523802bb5d93e9b2668dbc289c1c32868
SHA18643131e6eda41b888ddbecdfa896c71bf59db45
SHA256ec6451aad717a02744e9ae7a21147731076a0f229ba9ba0a8d37b4a96548a15b
SHA512b7432b23761a2eb9060c4bd7b57098fdd803126a7f43d8942c133bf7d6cb69b3016f3ca8b4fe14486455701cffd3647e62ee6e159b254da24038ac39f0843f28
-
Filesize
152KB
MD523802bb5d93e9b2668dbc289c1c32868
SHA18643131e6eda41b888ddbecdfa896c71bf59db45
SHA256ec6451aad717a02744e9ae7a21147731076a0f229ba9ba0a8d37b4a96548a15b
SHA512b7432b23761a2eb9060c4bd7b57098fdd803126a7f43d8942c133bf7d6cb69b3016f3ca8b4fe14486455701cffd3647e62ee6e159b254da24038ac39f0843f28
-
Filesize
152KB
MD523802bb5d93e9b2668dbc289c1c32868
SHA18643131e6eda41b888ddbecdfa896c71bf59db45
SHA256ec6451aad717a02744e9ae7a21147731076a0f229ba9ba0a8d37b4a96548a15b
SHA512b7432b23761a2eb9060c4bd7b57098fdd803126a7f43d8942c133bf7d6cb69b3016f3ca8b4fe14486455701cffd3647e62ee6e159b254da24038ac39f0843f28
-
Filesize
152KB
MD523802bb5d93e9b2668dbc289c1c32868
SHA18643131e6eda41b888ddbecdfa896c71bf59db45
SHA256ec6451aad717a02744e9ae7a21147731076a0f229ba9ba0a8d37b4a96548a15b
SHA512b7432b23761a2eb9060c4bd7b57098fdd803126a7f43d8942c133bf7d6cb69b3016f3ca8b4fe14486455701cffd3647e62ee6e159b254da24038ac39f0843f28