Analysis
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max time kernel
148s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
23/02/2024, 09:29
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-23_1c47538afda14f5bf9573dd8608dd347_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-23_1c47538afda14f5bf9573dd8608dd347_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-23_1c47538afda14f5bf9573dd8608dd347_cryptolocker.exe
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Size
49KB
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MD5
1c47538afda14f5bf9573dd8608dd347
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SHA1
e04ad14f503348fe0ae49b79da923f733a35f305
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SHA256
a8f80e1fb84d44a77304d80dfb4a623f1fff31b8beb095f89ba5e887f4a76f37
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SHA512
460f9b6bc9407c89562890e47bcf99683d643edadc6ac32e175c38f7d5fa2734456361cd2529c6aa4948000bfc6fa38558401ed065eea1951e47809edcb680e8
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SSDEEP
1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQPdUvn:BbdDmjr+OtEvwDpjMXK
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1804-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0007000000023107-13.dat CryptoLocker_rule2 behavioral2/memory/1804-21-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2424-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/1804-21-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2424-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/1804-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0007000000023107-13.dat UPX behavioral2/memory/1804-21-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2424-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation 2024-02-23_1c47538afda14f5bf9573dd8608dd347_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2424 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 1804 wrote to memory of 2424 1804 2024-02-23_1c47538afda14f5bf9573dd8608dd347_cryptolocker.exe 87 PID 1804 wrote to memory of 2424 1804 2024-02-23_1c47538afda14f5bf9573dd8608dd347_cryptolocker.exe 87 PID 1804 wrote to memory of 2424 1804 2024-02-23_1c47538afda14f5bf9573dd8608dd347_cryptolocker.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-23_1c47538afda14f5bf9573dd8608dd347_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-23_1c47538afda14f5bf9573dd8608dd347_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1804 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2424
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
49KB
MD55e2e710d40f59f96f96c8de12824c8aa
SHA108cfa6be414968b75e1344751a4b4f39c29f43dc
SHA2565117dd790eacfb08146e046ef6091ecedb78f9af709d86a11736ccb4ac0b6093
SHA512de943a48636eef210dd1467dc0d96ecfd67b64c73cf2aae702d3e51cfaafd140142394707c39b907adce47901c73b3949e5e2b394103c154f859fca0b86e9829