Analysis
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max time kernel
149s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
27/02/2024, 20:26
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-27_091cc984d2f1c97434aa6fa003930737_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-27_091cc984d2f1c97434aa6fa003930737_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-02-27_091cc984d2f1c97434aa6fa003930737_cryptolocker.exe
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Size
121KB
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MD5
091cc984d2f1c97434aa6fa003930737
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SHA1
0e75b59c2f9d427c0bb228aca76c4165606fd25e
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SHA256
751d4e1e3630ab5f09a3a23c307989046065b0345311b69c2262d8444d9dbfd5
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SHA512
71c6aa38594bb1b9a7992dc71fb374ab959e309bc600c5d89c0438d74acdacc350bad6259cf0b85fbfacad2cff4029843eac1addd7029530325c0396eec3b083
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SSDEEP
1536:u6QFElP6n+gWMOtEvwDpjJGYQbN/PKwMg8:u6a++OtEvwDpj6zY
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000700000001ebc7-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x000700000001ebc7-12.dat CryptoLocker_set1 -
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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation 2024-02-27_091cc984d2f1c97434aa6fa003930737_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4952 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 688 wrote to memory of 4952 688 2024-02-27_091cc984d2f1c97434aa6fa003930737_cryptolocker.exe 87 PID 688 wrote to memory of 4952 688 2024-02-27_091cc984d2f1c97434aa6fa003930737_cryptolocker.exe 87 PID 688 wrote to memory of 4952 688 2024-02-27_091cc984d2f1c97434aa6fa003930737_cryptolocker.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-27_091cc984d2f1c97434aa6fa003930737_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-27_091cc984d2f1c97434aa6fa003930737_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:688 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4952
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
122KB
MD558e373ba65b3183779a0a08362fa356a
SHA1b4c502379626e88da91fd548cc4903c0b2a828e0
SHA2569d29fbcf35b8415a770e05c4f3d1d8dc9a8a65cffa2fafecadd7a4a17c0f4b6b
SHA512f5fa1f510feeca1a2e55eb6df9c5b564c31f6db6175525a8b4aa0a9eb1d6d2c140a3dfa232b8149ecf5899226bd4a1565599b22e5bd6ea6a1590c2ff2a7b9ecf