Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
11/06/2024, 02:30
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-11_6b58f9f66d844179fad64670891d9f65_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-06-11_6b58f9f66d844179fad64670891d9f65_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-11_6b58f9f66d844179fad64670891d9f65_cryptolocker.exe
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Size
65KB
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MD5
6b58f9f66d844179fad64670891d9f65
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SHA1
5dace259f5bd0c16f75eda96579b14f28dc526e3
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SHA256
f8c124c9359304a07cadf151087d125be91c9f44def0596b6bab7a79719f7fbd
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SHA512
f99876f29ceeec9c994c7a55f7803cf57664ad5d942178a277c580f6a55bc40b186f8ded18327798f47228018da0ca4fcb15bdc14478108e855eee46386e2865
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SSDEEP
1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsi4:BbdDmjr+OtEvwDpjM8x
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3700-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000900000002297e-13.dat CryptoLocker_rule2 behavioral2/memory/3700-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2836-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2836-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/3700-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2836-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3700-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000900000002297e-13.dat UPX behavioral2/memory/3700-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2836-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2836-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation 2024-06-11_6b58f9f66d844179fad64670891d9f65_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2836 asih.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 3700 wrote to memory of 2836 3700 2024-06-11_6b58f9f66d844179fad64670891d9f65_cryptolocker.exe 80 PID 3700 wrote to memory of 2836 3700 2024-06-11_6b58f9f66d844179fad64670891d9f65_cryptolocker.exe 80 PID 3700 wrote to memory of 2836 3700 2024-06-11_6b58f9f66d844179fad64670891d9f65_cryptolocker.exe 80
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_6b58f9f66d844179fad64670891d9f65_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_6b58f9f66d844179fad64670891d9f65_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3700 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2836
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
65KB
MD59ed914be6690d0b17ff85530527b4275
SHA1e467d7e5e631678337b16cab794b1793747f3bd0
SHA256506d7ce8581058daff2c1d2bf9c503a97b920fd8a2d09c732ef776c448381b54
SHA512f72a7ac577f4be06289c7937ea066ec6bfc1417be792913f104b8c67c222789ee14a38aedff73f2ae2e22a216480da673df382b4949dceb2eded5dc7b95513ee