b77bac988167523362851ef6942cd42b86d233ef84771f680859cfcfb06fd9d4

General

Target

2024-05-23_ebf902c7ef05fa767158c5edbd5b4462_cryptolocker.exe
Size

40KB
MD5

ebf902c7ef05fa767158c5edbd5b4462
SHA1

894eeec88992c065246b05965bdec5441edd740f
SHA256

b77bac988167523362851ef6942cd42b86d233ef84771f680859cfcfb06fd9d4
SHA512

5f854a8d9c4f0d3194e4e64b4af0b4cb40724f3e52e788fd8caf72d3c405e899fecf7200769142b457b2c34176f849eeed68d19712a3d2d7b08176d126dd16b8
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaB0gj:qDdFJy3QMOtEvwDpjjWMl7TdCgj

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2976-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2808-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2976-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2808-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2976-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2808-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2976-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2808-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2976-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2808-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2976-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2808-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2808 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_ebf902c7ef05fa767158c5edbd5b4462_cryptolocker.exe

pid process

2976 2024-05-23_ebf902c7ef05fa767158c5edbd5b4462_cryptolocker.exe

pid	process
2808	asih.exe

pid	process
2976	2024-05-23_ebf902c7ef05fa767158c5edbd5b4462_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2976-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2808-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2976-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2808-27-0x0000000000500000-0x0000000000510000-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_ebf902c7ef05fa767158c5edbd5b4462_cryptolocker.exe

description	pid	process	target process
PID 2976 wrote to memory of 2808	2976	2024-05-23_ebf902c7ef05fa767158c5edbd5b4462_cryptolocker.exe	asih.exe
PID 2976 wrote to memory of 2808	2976	2024-05-23_ebf902c7ef05fa767158c5edbd5b4462_cryptolocker.exe	asih.exe
PID 2976 wrote to memory of 2808	2976	2024-05-23_ebf902c7ef05fa767158c5edbd5b4462_cryptolocker.exe	asih.exe
PID 2976 wrote to memory of 2808	2976	2024-05-23_ebf902c7ef05fa767158c5edbd5b4462_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_ebf902c7ef05fa767158c5edbd5b4462_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_ebf902c7ef05fa767158c5edbd5b4462_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2976

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2808

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
40KB

MD5
58bb664b8de65654000ebbb407281154

SHA1
6a363a8c3223ab6a2d31c33555162af6560463fa

SHA256
067e1db1a2f988128eb31165cbbe9889681a412f056c7614a7fd5538f7be9196

SHA512
120a224375bb8df25a02722e48b2c7b2e15ee736a28865ec0d9c8328eaace0e191e703920560fa7d3db5a8e7837833188875c8cd01ab17811e0977b1b37cda41

Download Submit
memory/2808-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2808-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2808-19-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2808-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2976-0-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2976-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2976-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2976-9-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2976-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads