Analysis
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max time kernel
151s -
max time network
48s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
29/11/2022, 17:00
Static task
static1
Behavioral task
behavioral1
Sample
cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.exe
Resource
win10v2004-20221111-en
windows10-2004-x64
1 signatures
150 seconds
General
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Target
cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.exe
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Size
208KB
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MD5
ca5449dec4ea3e3e8a4f4c0f7bb8b15d
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SHA1
874b5bcc9bf4208ca21078d37b83643d4460c80b
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SHA256
cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57
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SHA512
768db612a41fab8130a0a5590447399b8621fc4491459636a4eb174c7a15c512378852b8d7200ac499f379b1d25c3e2f8ed38ef8090cc04cb7adc7f7ad84481a
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SSDEEP
3072:uPD2eT5nWYPNsBy4Xyl+swASQMy6nl+yN4Gv:udHPNs7st/a
Score
10/10
Malware Config
Signatures
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Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.exe Set value (int) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" buousaj.exe -
Executes dropped EXE 1 IoCs
pid Process 972 buousaj.exe -
Loads dropped DLL 2 IoCs
pid Process 884 cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.exe 884 cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /q" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /m" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /t" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /u" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /x" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /z" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /r" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /d" buousaj.exe Key created \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\ cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /p" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /j" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /o" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /h" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /n" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /f" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /c" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /v" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /g" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /z" cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.exe Key created \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\ buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /k" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /l" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /w" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /a" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /b" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /i" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /s" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /e" buousaj.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\buousaj = "C:\\Users\\Admin\\buousaj.exe /y" buousaj.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 884 cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe 972 buousaj.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 884 cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.exe 972 buousaj.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 884 wrote to memory of 972 884 cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.exe 27 PID 884 wrote to memory of 972 884 cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.exe 27 PID 884 wrote to memory of 972 884 cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.exe 27 PID 884 wrote to memory of 972 884 cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.exe 27
Processes
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C:\Users\Admin\AppData\Local\Temp\cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.exe"C:\Users\Admin\AppData\Local\Temp\cf9555b4af833f58c8c43e0eecde0576ca83f395c22748442703108dffe09b57.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:884 -
C:\Users\Admin\buousaj.exe"C:\Users\Admin\buousaj.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:972
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
208KB
MD5571b482d3578f09ef5e1f07f731463b1
SHA1f66ba9af163e83755a833fc5bb1742b0eef71a95
SHA25624507228cf85a9699c99ef9f273218e374fd2efd6f3f533bea217717faf22a29
SHA51223db3ebe97ac4c3458f497492d7c7d353797a75f592dba92fe0bf00a2fcad7a9011d4c358271f853a2c6bd4d809d9bc3bf1344fdd766a14ad8c7187f023358f6
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Filesize
208KB
MD5571b482d3578f09ef5e1f07f731463b1
SHA1f66ba9af163e83755a833fc5bb1742b0eef71a95
SHA25624507228cf85a9699c99ef9f273218e374fd2efd6f3f533bea217717faf22a29
SHA51223db3ebe97ac4c3458f497492d7c7d353797a75f592dba92fe0bf00a2fcad7a9011d4c358271f853a2c6bd4d809d9bc3bf1344fdd766a14ad8c7187f023358f6
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Filesize
208KB
MD5571b482d3578f09ef5e1f07f731463b1
SHA1f66ba9af163e83755a833fc5bb1742b0eef71a95
SHA25624507228cf85a9699c99ef9f273218e374fd2efd6f3f533bea217717faf22a29
SHA51223db3ebe97ac4c3458f497492d7c7d353797a75f592dba92fe0bf00a2fcad7a9011d4c358271f853a2c6bd4d809d9bc3bf1344fdd766a14ad8c7187f023358f6
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Filesize
208KB
MD5571b482d3578f09ef5e1f07f731463b1
SHA1f66ba9af163e83755a833fc5bb1742b0eef71a95
SHA25624507228cf85a9699c99ef9f273218e374fd2efd6f3f533bea217717faf22a29
SHA51223db3ebe97ac4c3458f497492d7c7d353797a75f592dba92fe0bf00a2fcad7a9011d4c358271f853a2c6bd4d809d9bc3bf1344fdd766a14ad8c7187f023358f6