3c5a47566d482f673b40b2694d9e398d0ac8de5b47672817c095d7da723ced91

Analysis

max time kernel
148s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
25/04/2024, 10:51

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General

Target

2024-04-25_f6525db6b2e96d6a82bcec671dfa4cac_cryptolocker.exe
Size

95KB
MD5

f6525db6b2e96d6a82bcec671dfa4cac
SHA1

751f5b13141889744fe39efe22917cf6f88838de
SHA256

3c5a47566d482f673b40b2694d9e398d0ac8de5b47672817c095d7da723ced91
SHA512

afc3d17660b04e6e86ea991d3e27850ae92eb787973c9bb5a2c6956b10a0baf6c791abd614ba05a8033a0735ba470250145c3054022b97ecd28f619639bfcad5
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpYIb:AnBdOOtEvwDpj6zA

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2888-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x00070000000120e4-11.dat	CryptoLocker_rule2
behavioral1/memory/2888-14-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2920-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2920-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2888-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x00070000000120e4-11.dat	CryptoLocker_set1
behavioral1/memory/2888-14-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2920-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2920-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2888-1-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x00070000000120e4-11.dat	UPX
behavioral1/memory/2888-14-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2920-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2920-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2920	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2888	2024-04-25_f6525db6b2e96d6a82bcec671dfa4cac_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2888-1-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x00070000000120e4-11.dat	upx
behavioral1/memory/2888-14-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2920-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2920-27-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 2888 wrote to memory of 2920	2888	2024-04-25_f6525db6b2e96d6a82bcec671dfa4cac_cryptolocker.exe	28
PID 2888 wrote to memory of 2920	2888	2024-04-25_f6525db6b2e96d6a82bcec671dfa4cac_cryptolocker.exe	28
PID 2888 wrote to memory of 2920	2888	2024-04-25_f6525db6b2e96d6a82bcec671dfa4cac_cryptolocker.exe	28
PID 2888 wrote to memory of 2920	2888	2024-04-25_f6525db6b2e96d6a82bcec671dfa4cac_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-25_f6525db6b2e96d6a82bcec671dfa4cac_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-25_f6525db6b2e96d6a82bcec671dfa4cac_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2888
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2920

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
95KB

MD5
1e6f43b6171aebaeadb44e6108e67064

SHA1
980ef6b56cccfab78b8bc63886f02d91b8dd307a

SHA256
4a9a4046bb1f1389d39ce72b0c674a5b6fb14e231b743e01e8f94ead35f7cbee

SHA512
787444310736e2c2d6ec189b4820d1a62678bd36519864703b94d682ecdc2a27689382aae85754e4b19f4709a396fadbd1407d651a14ba21d15f0a199826b9b5

Download Submit
memory/2888-1-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2888-0-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2888-3-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2888-2-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2888-14-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2888-15-0x0000000002480000-0x000000000248F000-memory.dmp

Filesize
60KB

Download
memory/2888-28-0x0000000002480000-0x000000000248F000-memory.dmp

Filesize
60KB

Download
memory/2920-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2920-19-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2920-20-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2920-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download