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Analysis
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max time kernel
152s -
max time network
163s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
12/03/2024, 15:27
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-12_21af3b45a2eb950e47b5fe8e754f3fa6_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-12_21af3b45a2eb950e47b5fe8e754f3fa6_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-12_21af3b45a2eb950e47b5fe8e754f3fa6_cryptolocker.exe
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Size
57KB
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MD5
21af3b45a2eb950e47b5fe8e754f3fa6
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SHA1
8a3a7fd0cd95d3a356e7b380b572290a0d9fc25c
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SHA256
6873fa16feb3acf11dc38cff5c30471af9cce6c58416a26d7e91130bb388bd89
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SHA512
8e9e981b75ca14712e0477c18bfb1d7199399cfb52addbada1d53f5da59dbaa084f8e143af828c10b8795dce4a6ba4ac0969216e0722640cf533598a8d286626
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SSDEEP
768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZgBh8i6g7Gowfj8ui:xj+VGMOtEvwDpjubEgdi
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3900-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000023229-13.dat CryptoLocker_rule2 behavioral2/memory/1848-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3900-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1848-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3900-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000023229-13.dat CryptoLocker_set1 behavioral2/memory/1848-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3900-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1848-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 5 IoCs
resource yara_rule behavioral2/memory/3900-0-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x0008000000023229-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/1848-17-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/3900-19-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/1848-27-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress -
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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation 2024-03-12_21af3b45a2eb950e47b5fe8e754f3fa6_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1848 misid.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 3900 wrote to memory of 1848 3900 2024-03-12_21af3b45a2eb950e47b5fe8e754f3fa6_cryptolocker.exe 91 PID 3900 wrote to memory of 1848 3900 2024-03-12_21af3b45a2eb950e47b5fe8e754f3fa6_cryptolocker.exe 91 PID 3900 wrote to memory of 1848 3900 2024-03-12_21af3b45a2eb950e47b5fe8e754f3fa6_cryptolocker.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-12_21af3b45a2eb950e47b5fe8e754f3fa6_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-12_21af3b45a2eb950e47b5fe8e754f3fa6_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3900 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:1848
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
57KB
MD5c258404405ea6743a52b23944085706d
SHA15c72558f2bbef4d31d002c67a9575c28bab1c9b5
SHA2568dee1f423d9c192ab81458aaa0fe9723aebc77406a5bfd04f62abbb44c4e1e80
SHA5122b7727e1206565b7aaf89cececc4689bed1d86ef4648570725532f0ecf0dd3599413969eae2031be54e3c37a60b07a30ba516d50115bb1cbd3db22159be7d218