b943cddde6610f7f3e4a503c3e84c66ae49eb384df6a5850fd5a383d362da947

Analysis

max time kernel
149s
max time network
154s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 02:28

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General

Target

2024-05-23_3ec81babe1e673a4bd9a412fce5483cd_cryptolocker.exe
Size

24KB
MD5

3ec81babe1e673a4bd9a412fce5483cd
SHA1

29895035057e1f160c5a8b904e061ebf4460074d
SHA256

b943cddde6610f7f3e4a503c3e84c66ae49eb384df6a5850fd5a383d362da947
SHA512

634313708a4d149d33242bb042c94e2153b3010a7383f87f6b523285aa41a82cbc8433d2ecc577254baf5bd1cc4d75b32c62fb9842ef8307f756b9abdf3d8186
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJ2o:bVCPwFRo6CpwXFXSqQXfjAsJ7

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2264-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral1/memory/2824-18-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2264-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2824-28-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2264-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\hasfj.exe	UPX
behavioral1/memory/2824-18-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2264-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2824-28-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

2824 hasfj.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_3ec81babe1e673a4bd9a412fce5483cd_cryptolocker.exe

pid process

2264 2024-05-23_3ec81babe1e673a4bd9a412fce5483cd_cryptolocker.exe

pid	process
2824	hasfj.exe

pid	process
2264	2024-05-23_3ec81babe1e673a4bd9a412fce5483cd_cryptolocker.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/2264-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\hasfj.exe	upx
behavioral1/memory/2824-18-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2264-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2824-28-0x0000000008000000-0x000000000800E000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-23_3ec81babe1e673a4bd9a412fce5483cd_cryptolocker.exe

description	pid	process	target process
PID 2264 wrote to memory of 2824	2264	2024-05-23_3ec81babe1e673a4bd9a412fce5483cd_cryptolocker.exe	hasfj.exe
PID 2264 wrote to memory of 2824	2264	2024-05-23_3ec81babe1e673a4bd9a412fce5483cd_cryptolocker.exe	hasfj.exe
PID 2264 wrote to memory of 2824	2264	2024-05-23_3ec81babe1e673a4bd9a412fce5483cd_cryptolocker.exe	hasfj.exe
PID 2264 wrote to memory of 2824	2264	2024-05-23_3ec81babe1e673a4bd9a412fce5483cd_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_3ec81babe1e673a4bd9a412fce5483cd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_3ec81babe1e673a4bd9a412fce5483cd_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2264

C:\Users\Admin\AppData\Local\Temp\hasfj.exe
"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
2⤵
- Executes dropped EXE
PID:2824

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\hasfj.exe
Filesize
24KB

MD5
75228cdb6b494cbc99ea9bc65fa94dbe

SHA1
f704dd98d311e56c91921fa2515bfa23257615bd

SHA256
3b521837c71c25e5a0a07b5d6461bcc82435f00c2a93cf095039acd5a2aac522

SHA512
a4221b804dde9ddc947f7bba6cd6ce4b3556d8e896f4abf434d5364e2fa957c4fddc74c87a8fd56bb9e90bc793884d43406b67e1a1b220c2335077ad76a4ddaa

Download Submit
memory/2264-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2264-1-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2264-3-0x0000000000410000-0x0000000000416000-memory.dmp

Filesize
24KB

Download
memory/2264-2-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2264-14-0x0000000003070000-0x000000000307E000-memory.dmp

Filesize
56KB

Download
memory/2264-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2824-18-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2824-20-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download
memory/2824-27-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2824-28-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download