Analysis
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max time kernel
150s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
22/02/2024, 17:38
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe
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Size
31KB
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MD5
5b3f14eadc9ee8eacdf50f2b4ed39e1d
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SHA1
c791bfa73b31650d249feb6672e85083b74b972b
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SHA256
e689e0dd3483f5cec614632fe93788fbde40d9b5f92020162f15e5f2854f30ad
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SHA512
8442fbda0557183e1d9fa6220c260ab4cb49a5d3c5aef7285fad9639a8f81a2fdb1e087aa6e9eb5d65f3bd28873ae46527a81a8d193ca32c82f085071246c613
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznUssoT:b/yC4GyNM01GuQMNXw2PSjWoT
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x00070000000231d6-12.dat CryptoLocker_rule2 -
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-1-5-21-3054445511-921769590-4013668107-1000\Control Panel\International\Geo\Nation 2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4980 retln.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 1596 wrote to memory of 4980 1596 2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe 88 PID 1596 wrote to memory of 4980 1596 2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe 88 PID 1596 wrote to memory of 4980 1596 2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1596 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:4980
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
31KB
MD56b2cebbda46f03e28edcc28c4d0e3e12
SHA11cc9c621b828608cdc4d68aab3d933dc48664a9a
SHA2564620177060892eb70ca96513e1749d0a1e145a4359db5a04fd08aaf21e29c5be
SHA512c752ca421c7793029a77fe93c171110366c73672c33e1147c81cf084bed58b598adfe7feb057bcaf286a868ab989184010e775b4c38f1d4871b334cf27f61b3e