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Analysis
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max time kernel
149s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
28/05/2024, 03:35
Behavioral task
behavioral1
Sample
2024-05-28_411c3d2d9fd9eca8fb33f250b91f86d2_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-28_411c3d2d9fd9eca8fb33f250b91f86d2_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-05-28_411c3d2d9fd9eca8fb33f250b91f86d2_cryptolocker.exe
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Size
34KB
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MD5
411c3d2d9fd9eca8fb33f250b91f86d2
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SHA1
9820f01197bed54093d53228ba3ece3f2a18370c
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SHA256
6aae30f2e7555d64b5d408d1f35b506a5836d0c3735867dbc9ddb698333cedb3
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SHA512
6be01c5cdfbbb93c6ae934b2e94233bfe5ba4f4f8268ba2ae7d8fb035358f867664023f7fd0414be7413a7969ad42432ad022dd4f60c3ce572a06db6dd66caf2
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SSDEEP
768:bFPm5zusFUB2preAr+Ofjg0S16avdrQFiLjJvtXq:bFPmpiif/oc+vXq
Malware Config
Signatures
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Detection of CryptoLocker Variants 6 IoCs
resource yara_rule behavioral1/memory/2284-0-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000a000000012280-11.dat CryptoLocker_rule2 behavioral1/memory/2284-13-0x00000000021D0000-0x00000000021DE000-memory.dmp CryptoLocker_rule2 behavioral1/memory/3004-18-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2284-17-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral1/memory/3004-28-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 6 IoCs
resource yara_rule behavioral1/memory/2284-0-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral1/files/0x000a000000012280-11.dat UPX behavioral1/memory/2284-13-0x00000000021D0000-0x00000000021DE000-memory.dmp UPX behavioral1/memory/3004-18-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral1/memory/2284-17-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral1/memory/3004-28-0x0000000008000000-0x000000000800E000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 3004 lossy.exe -
Loads dropped DLL 1 IoCs
pid Process 2284 2024-05-28_411c3d2d9fd9eca8fb33f250b91f86d2_cryptolocker.exe -
resource yara_rule behavioral1/memory/2284-0-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral1/files/0x000a000000012280-11.dat upx behavioral1/memory/2284-13-0x00000000021D0000-0x00000000021DE000-memory.dmp upx behavioral1/memory/3004-18-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral1/memory/2284-17-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral1/memory/3004-28-0x0000000008000000-0x000000000800E000-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 2284 wrote to memory of 3004 2284 2024-05-28_411c3d2d9fd9eca8fb33f250b91f86d2_cryptolocker.exe 28 PID 2284 wrote to memory of 3004 2284 2024-05-28_411c3d2d9fd9eca8fb33f250b91f86d2_cryptolocker.exe 28 PID 2284 wrote to memory of 3004 2284 2024-05-28_411c3d2d9fd9eca8fb33f250b91f86d2_cryptolocker.exe 28 PID 2284 wrote to memory of 3004 2284 2024-05-28_411c3d2d9fd9eca8fb33f250b91f86d2_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-28_411c3d2d9fd9eca8fb33f250b91f86d2_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-28_411c3d2d9fd9eca8fb33f250b91f86d2_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2284 -
C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
PID:3004
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
35KB
MD5c33e0bec7f0f4f4a3cfa8cdd251458d6
SHA1fd5d2546c73164bd26022e3ecc26a1f7406959b0
SHA256a7fd59921cae71cb98fb1d2a7a9dd06bdfb538386bbd0160d25be1d01c635cd9
SHA512bd275b1fa31d59c63cfc447495b418e029c48c51332e33767a4a0aaae21d1291435842c38e1eb0ee6b08e5df0f015f9421cc158ced9d3853392a5bbbac4587f8