8bbd6b32d88137612d4c944aaa0cec90a13ffe4550a53aac0826304095ec68a5

General

Target

2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe
Size

66KB
MD5

5c998288d9291a67b44adc886a12d1e5
SHA1

fb036c8b03d8a7a5bf0f4529446f1f793207c6e7
SHA256

8bbd6b32d88137612d4c944aaa0cec90a13ffe4550a53aac0826304095ec68a5
SHA512

99632ba27fd7c1d0c31ed727bd9a0f9eb3fe3f41e9106b7e382779bca50b3fae4450dfaba96273189389f8669afd3dd0c10a3764c8b4cf512c52ad51fc3868b3
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xDyf5:1nK6a+qdOOtEvwDpjG

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2356-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2356-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2356-14-0x0000000001ED0000-0x0000000001EE0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3016-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2356-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2356-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2356-14-0x0000000001ED0000-0x0000000001EE0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3016-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2356-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2356-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2356-14-0x0000000001ED0000-0x0000000001EE0000-memory.dmp	UPX
behavioral1/memory/3016-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3016 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe

pid process

2356 2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe

pid	process
3016	asih.exe

pid	process
2356	2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2356-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2356-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2356-14-0x0000000001ED0000-0x0000000001EE0000-memory.dmp	upx
behavioral1/memory/3016-26-0x0000000000500000-0x000000000050F311-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_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe

description	pid	process	target process
PID 2356 wrote to memory of 3016	2356	2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe	asih.exe
PID 2356 wrote to memory of 3016	2356	2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe	asih.exe
PID 2356 wrote to memory of 3016	2356	2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe	asih.exe
PID 2356 wrote to memory of 3016	2356	2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_5c998288d9291a67b44adc886a12d1e5_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:3016

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
66KB

MD5
6a6280cdfff7bd01481bb470e849feb3

SHA1
c46e455a9528b1408d7353c486f499a9da1d0400

SHA256
b7f25a1a3179d0c323e3666bd224ac8f3be6f0fbbd5663b2e84c0d586bbfe98b

SHA512
b7cff2f6f0cda40494568bb37a15d12d7553082622a38c8d079887797250df5f140c87f66914136192a18b387bbefcc73345964acb1b8e3456ccaceed52747f5

Download Submit
memory/2356-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2356-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2356-2-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/2356-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2356-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2356-14-0x0000000001ED0000-0x0000000001EE0000-memory.dmp

Filesize
64KB

Download
memory/3016-18-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/3016-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3016-25-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads