Analysis
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max time kernel
12s -
max time network
125s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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 behavioral1/files/0x000b000000012251-14.dat CryptoLocker_rule2 -
Executes dropped EXE 1 IoCs
pid Process 2572 retln.exe -
Loads dropped DLL 1 IoCs
pid Process 2192 2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe -
Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of UnmapMainImage 2 IoCs
pid Process 2192 2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe 2572 retln.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2192 wrote to memory of 2572 2192 2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe 28 PID 2192 wrote to memory of 2572 2192 2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe 28 PID 2192 wrote to memory of 2572 2192 2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe 28 PID 2192 wrote to memory of 2572 2192 2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe 28
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⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2192 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
- Suspicious use of UnmapMainImage
PID:2572
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
-
Filesize
31KB
MD56b2cebbda46f03e28edcc28c4d0e3e12
SHA11cc9c621b828608cdc4d68aab3d933dc48664a9a
SHA2564620177060892eb70ca96513e1749d0a1e145a4359db5a04fd08aaf21e29c5be
SHA512c752ca421c7793029a77fe93c171110366c73672c33e1147c81cf084bed58b598adfe7feb057bcaf286a868ab989184010e775b4c38f1d4871b334cf27f61b3e