Analysis
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max time kernel
150s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
04-03-2024 03:30
Static task
static1
Behavioral task
behavioral1
Sample
b1c38c5beea330b94b80a97980a96762.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
b1c38c5beea330b94b80a97980a96762.exe
Resource
win10v2004-20240226-en
General
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Target
b1c38c5beea330b94b80a97980a96762.exe
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Size
390KB
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MD5
b1c38c5beea330b94b80a97980a96762
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SHA1
5e3647cbb76dc43998922e4ebaa741ea7d34126e
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SHA256
2514a2fe3d78d5974c2c3b080d20707f95653cd1892be272733264f202de24ac
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SHA512
2054280aaa0d94582c1b45e4ff8f7986ea01c212f813a551f908b648f49988a955deaea259ed5d264c610b7c9024231945ced3685d4ce2132e75552a86442a7a
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SSDEEP
6144:rWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvCQAISbg:rWkEuCaNT85I2vCMX5l+ZRvmIf
Malware Config
Signatures
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CryptoLocker
Ransomware family with multiple variants.
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Deletes itself 1 IoCs
Processes:
{34184A33-0407-212E-3320-09040709E2C2}.exepid process 1276 {34184A33-0407-212E-3320-09040709E2C2}.exe -
Executes dropped EXE 2 IoCs
Processes:
{34184A33-0407-212E-3320-09040709E2C2}.exe{34184A33-0407-212E-3320-09040709E2C2}.exepid process 1276 {34184A33-0407-212E-3320-09040709E2C2}.exe 736 {34184A33-0407-212E-3320-09040709E2C2}.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
{34184A33-0407-212E-3320-09040709E2C2}.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Roaming\\{34184A33-0407-212E-3320-09040709E2C2}.exe" {34184A33-0407-212E-3320-09040709E2C2}.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
b1c38c5beea330b94b80a97980a96762.exe{34184A33-0407-212E-3320-09040709E2C2}.exedescription pid process target process PID 4312 wrote to memory of 1276 4312 b1c38c5beea330b94b80a97980a96762.exe {34184A33-0407-212E-3320-09040709E2C2}.exe PID 4312 wrote to memory of 1276 4312 b1c38c5beea330b94b80a97980a96762.exe {34184A33-0407-212E-3320-09040709E2C2}.exe PID 4312 wrote to memory of 1276 4312 b1c38c5beea330b94b80a97980a96762.exe {34184A33-0407-212E-3320-09040709E2C2}.exe PID 1276 wrote to memory of 736 1276 {34184A33-0407-212E-3320-09040709E2C2}.exe {34184A33-0407-212E-3320-09040709E2C2}.exe PID 1276 wrote to memory of 736 1276 {34184A33-0407-212E-3320-09040709E2C2}.exe {34184A33-0407-212E-3320-09040709E2C2}.exe PID 1276 wrote to memory of 736 1276 {34184A33-0407-212E-3320-09040709E2C2}.exe {34184A33-0407-212E-3320-09040709E2C2}.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\b1c38c5beea330b94b80a97980a96762.exe"C:\Users\Admin\AppData\Local\Temp\b1c38c5beea330b94b80a97980a96762.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:4312 -
C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe"C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" "/rC:\Users\Admin\AppData\Local\Temp\b1c38c5beea330b94b80a97980a96762.exe"2⤵
- Deletes itself
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1276 -
C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe"C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w0000021C3⤵
- Executes dropped EXE
PID:736
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exeFilesize
390KB
MD5b1c38c5beea330b94b80a97980a96762
SHA15e3647cbb76dc43998922e4ebaa741ea7d34126e
SHA2562514a2fe3d78d5974c2c3b080d20707f95653cd1892be272733264f202de24ac
SHA5122054280aaa0d94582c1b45e4ff8f7986ea01c212f813a551f908b648f49988a955deaea259ed5d264c610b7c9024231945ced3685d4ce2132e75552a86442a7a