Analysis
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max time kernel
148s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
21/04/2024, 00:40
Behavioral task
behavioral1
Sample
2024-04-21_a187fb61a71435098909aa9a5a4537ca_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-21_a187fb61a71435098909aa9a5a4537ca_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-21_a187fb61a71435098909aa9a5a4537ca_cryptolocker.exe
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Size
72KB
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MD5
a187fb61a71435098909aa9a5a4537ca
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SHA1
5f07eab42564c13d0b7958489c6dc9c12354951d
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SHA256
cd77ea721eda7eebe00bdaeb1ade8241f9b770eab50cb317f22fac3541946164
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SHA512
bb3160667b17070de874a507ac61aa92592feb2db88c81b4c51ca8a8c6f64e80aaf0f75cd80ef848e3d0935f1907a18b11f2cb2a0ec3d13a5243a28166de0b2e
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SSDEEP
1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaFAeBz:z6a+CdOOtEvwDpjQx
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral1/memory/2388-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2388-14-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000a000000012255-15.dat CryptoLocker_rule2 behavioral1/memory/2560-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2560-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral1/memory/2388-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2388-14-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/files/0x000a000000012255-15.dat CryptoLocker_set1 behavioral1/memory/2560-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2560-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral1/memory/2388-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2388-14-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/files/0x000a000000012255-15.dat UPX behavioral1/memory/2560-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2560-26-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 2560 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 2388 2024-04-21_a187fb61a71435098909aa9a5a4537ca_cryptolocker.exe -
resource yara_rule behavioral1/memory/2388-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2388-14-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/files/0x000a000000012255-15.dat upx behavioral1/memory/2560-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2560-26-0x0000000000500000-0x0000000000510000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2388 wrote to memory of 2560 2388 2024-04-21_a187fb61a71435098909aa9a5a4537ca_cryptolocker.exe 28 PID 2388 wrote to memory of 2560 2388 2024-04-21_a187fb61a71435098909aa9a5a4537ca_cryptolocker.exe 28 PID 2388 wrote to memory of 2560 2388 2024-04-21_a187fb61a71435098909aa9a5a4537ca_cryptolocker.exe 28 PID 2388 wrote to memory of 2560 2388 2024-04-21_a187fb61a71435098909aa9a5a4537ca_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-21_a187fb61a71435098909aa9a5a4537ca_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-21_a187fb61a71435098909aa9a5a4537ca_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2388 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2560
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
73KB
MD51726107ef7a58c910747841cb7d7d21e
SHA14376ccc55ac91dee1d0577a84197b420d562fb8a
SHA256cfbbc6afecd5844c884346ca50bacffdca05122f06cb33106a15b6f7f5969b16
SHA512f87cbcc52e70af9d19972596e96b2569bb93b8bb5c193a514d658e4fd5834a3c1197fc661c57ebfe3146e800d442f258a255eb12b476976ff6c89e2e79c91411