2409ebccaaa4263de224f3634969432db1ed5fbee3181cd42a8de730ac4536ea

General

Target

2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe
Size

91KB
MD5

8473ea94adbec71499d353f8a840e402
SHA1

aebfebc2345b21456403488382bc1ef251f16258
SHA256

2409ebccaaa4263de224f3634969432db1ed5fbee3181cd42a8de730ac4536ea
SHA512

243ddf4977798b95ba1ba80bcf3734a7d7aa11c3687e0356a354ebaca72a26ce17e4b35e78fac3061f80d9b96fe06396ae4b73942d71b76b30dead9935e7b108
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgddg:AnBdOOtEvwDpj6zk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2356-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2356-13-0x0000000000680000-0x000000000068F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2184-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2184-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2356-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2356-13-0x0000000000680000-0x000000000068F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2184-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2184-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2356-1-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2356-13-0x0000000000680000-0x000000000068F000-memory.dmp	UPX
behavioral1/memory/2184-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2184-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2184 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe

pid process

2356 2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe

pid	process
2184	asih.exe

pid	process
2356	2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2356-1-0x0000000000500000-0x000000000050F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2356-13-0x0000000000680000-0x000000000068F000-memory.dmp	upx
behavioral1/memory/2184-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2184-27-0x0000000000500000-0x000000000050F000-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:

2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe

description	pid	process	target process
PID 2356 wrote to memory of 2184	2356	2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe	asih.exe
PID 2356 wrote to memory of 2184	2356	2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe	asih.exe
PID 2356 wrote to memory of 2184	2356	2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe	asih.exe
PID 2356 wrote to memory of 2184	2356	2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2356

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2184

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
91KB

MD5
20523d489924cc3118b7ad22beae3641

SHA1
8f70103e8a14c3e021455fc933eec96be40b0fba

SHA256
d9750cc7a53b04968b55ef3871df492cd789dd57e4992480a9fbdeccd8c44d1a

SHA512
75a088da202b6c641938926ed5626755bbdac50797d61a4f24d351a9c9c81be716277227aed7d7be9e2bcdbfa5a46c375f4024430e35b5efc332fd806fd659cd

Download Submit
memory/2184-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2184-19-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2184-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2184-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2356-0-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2356-2-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2356-1-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2356-3-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2356-13-0x0000000000680000-0x000000000068F000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads