Analysis
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max time kernel
149s -
max time network
153s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
23-04-2024 03:31
Behavioral task
behavioral1
Sample
2024-04-23_36453e8cab90219e8427953e3f594452_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-23_36453e8cab90219e8427953e3f594452_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-23_36453e8cab90219e8427953e3f594452_cryptolocker.exe
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Size
128KB
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MD5
36453e8cab90219e8427953e3f594452
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SHA1
640f18e2a133dd0e1eaa4cff24ee7e87330a64f1
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SHA256
dab41a09e41d9526787bb56910ffcff3cbd8d2cef64ba000914fd4f244a66617
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SHA512
fb58ad36df738a68c1ef661da59951f086861563fc546df7bf111a6a04cb9da8de8cb7236ddb74da022d2e06c2dc67fa740ec94a5d46d2dcc1911678c19c828d
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1ebHkw:AnBdOOtEvwDpj6zt
Malware Config
Signatures
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Detection of CryptoLocker Variants 6 IoCs
resource yara_rule behavioral1/memory/2772-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000900000001222b-11.dat CryptoLocker_rule2 behavioral1/memory/2772-15-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2772-13-0x0000000001EA0000-0x0000000001EAF000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2932-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2932-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 6 IoCs
resource yara_rule behavioral1/memory/2772-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/files/0x000900000001222b-11.dat CryptoLocker_set1 behavioral1/memory/2772-15-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/memory/2772-13-0x0000000001EA0000-0x0000000001EAF000-memory.dmp CryptoLocker_set1 behavioral1/memory/2932-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/memory/2932-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral1/memory/2772-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/files/0x000900000001222b-11.dat UPX behavioral1/memory/2772-15-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/memory/2932-17-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/memory/2932-27-0x0000000000500000-0x000000000050F000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 2932 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 2772 2024-04-23_36453e8cab90219e8427953e3f594452_cryptolocker.exe -
resource yara_rule behavioral1/memory/2772-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/files/0x000900000001222b-11.dat upx behavioral1/memory/2772-15-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/memory/2932-17-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/memory/2932-27-0x0000000000500000-0x000000000050F000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2772 wrote to memory of 2932 2772 2024-04-23_36453e8cab90219e8427953e3f594452_cryptolocker.exe 28 PID 2772 wrote to memory of 2932 2772 2024-04-23_36453e8cab90219e8427953e3f594452_cryptolocker.exe 28 PID 2772 wrote to memory of 2932 2772 2024-04-23_36453e8cab90219e8427953e3f594452_cryptolocker.exe 28 PID 2772 wrote to memory of 2932 2772 2024-04-23_36453e8cab90219e8427953e3f594452_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-23_36453e8cab90219e8427953e3f594452_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-23_36453e8cab90219e8427953e3f594452_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2772 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2932
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
129KB
MD5e057bec1e43efdc0e21724b19fd3a4da
SHA1cd5c2b60b69150eac51c55300b490249418b0a90
SHA256e2a7205afd67b1eed57f90b1fe68739334038c79f3a86e2cc97b43ff20c624ee
SHA512b3cd270d7d369d3f393f2a9a685dde2c6e0546720d90fc4c524b83813bd5907d38108d1369f349ce6a06d6294df9c026249a8e2d4bc70ab42b608714907d9ded