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Analysis
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max time kernel
88s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
03/02/2024, 18:21
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-03_018ea4d649a9832ba28c440ca7d9a3f3_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-03_018ea4d649a9832ba28c440ca7d9a3f3_cryptolocker.exe
Resource
win10v2004-20231222-en
General
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Target
2024-02-03_018ea4d649a9832ba28c440ca7d9a3f3_cryptolocker.exe
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Size
38KB
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MD5
018ea4d649a9832ba28c440ca7d9a3f3
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SHA1
a8a88f98da29629102bd4614e77e40321c513b51
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SHA256
1d023d7f4fb25ffcb7249d44ce7f57ac812e1bb71ad7ce4f772d5f4dc399e197
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SHA512
dd3b0943bd3994410f3667e8cd4cdbdae091905f9922209500bbd89bb178c2c1df3bd33ba5d161de50616dce85e2c47eb9c81fba8873f1b4ecbfbfe947e24e61
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SSDEEP
768:XS5nQJ24LR1bytOOtEvwDpj66BLbjG9Rva/ysz1:i5nkFGMOtEvwDpjR+viDz1
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/3800-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000900000002313b-13.dat CryptoLocker_rule2 behavioral2/memory/3800-16-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2380-52-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/3800-16-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/2380-52-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/3800-0-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x000900000002313b-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/3800-16-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/2380-52-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation misid.exe Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation 2024-02-03_018ea4d649a9832ba28c440ca7d9a3f3_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2380 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 3800 wrote to memory of 2380 3800 2024-02-03_018ea4d649a9832ba28c440ca7d9a3f3_cryptolocker.exe 88 PID 3800 wrote to memory of 2380 3800 2024-02-03_018ea4d649a9832ba28c440ca7d9a3f3_cryptolocker.exe 88 PID 3800 wrote to memory of 2380 3800 2024-02-03_018ea4d649a9832ba28c440ca7d9a3f3_cryptolocker.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-03_018ea4d649a9832ba28c440ca7d9a3f3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-03_018ea4d649a9832ba28c440ca7d9a3f3_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3800 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
PID:2380
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
39KB
MD5e888280aac15e203941f3b80efdc082b
SHA15cdc4585180405add4b4244cfb8c1e7ac8580cb9
SHA2567100b145c4eca61aed6b987cf17c8705aff3515542c9049cc866fe29ac6d7a32
SHA5120f6a692276c19b04cc964f2fe546f221a3563efd4a951743627d6c4e4582a192c38329ae5d1da3bf432a1122d6f95637ba2104d530fd391635ac8ce6fe8982c8