b72b3d90646dfe586e31d7a700f4ede4ff89cc77e2ac6afa7f793e8a6279edfa

General

Target

2024-02-12_d631986b32595b0722584f5013afa11e_cryptolocker.exe
Size

65KB
MD5

d631986b32595b0722584f5013afa11e
SHA1

fb4ff69e111b0926046ca5eaaa1335ff1305661c
SHA256

b72b3d90646dfe586e31d7a700f4ede4ff89cc77e2ac6afa7f793e8a6279edfa
SHA512

beb77c3d7b5506e7d76590c18c92a61dff78442a7bdf3dbe350ac178631d367ac7783689adf0a3d0d99d624b9426d2ec77ecf69295438d4f6cb001915be96b79
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6UE:1nK6a+qdOOtEvwDpjh

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2288-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2288-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2448-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2448-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2288-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2288-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2448-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2448-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2288-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2288-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2448-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2448-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2448 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-02-12_d631986b32595b0722584f5013afa11e_cryptolocker.exe

pid process

2288 2024-02-12_d631986b32595b0722584f5013afa11e_cryptolocker.exe

pid	process
2448	asih.exe

pid	process
2288	2024-02-12_d631986b32595b0722584f5013afa11e_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2288-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2288-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2448-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2448-27-0x0000000000500000-0x000000000050F311-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:

2024-02-12_d631986b32595b0722584f5013afa11e_cryptolocker.exe

description	pid	process	target process
PID 2288 wrote to memory of 2448	2288	2024-02-12_d631986b32595b0722584f5013afa11e_cryptolocker.exe	asih.exe
PID 2288 wrote to memory of 2448	2288	2024-02-12_d631986b32595b0722584f5013afa11e_cryptolocker.exe	asih.exe
PID 2288 wrote to memory of 2448	2288	2024-02-12_d631986b32595b0722584f5013afa11e_cryptolocker.exe	asih.exe
PID 2288 wrote to memory of 2448	2288	2024-02-12_d631986b32595b0722584f5013afa11e_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_d631986b32595b0722584f5013afa11e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_d631986b32595b0722584f5013afa11e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2288

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2448

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

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

Filesize
65KB

MD5
39cc4e753c4828f5cb3e57c21f9dd3ea

SHA1
f53adffee237a909a9d4706f799bd6ef5ba0ffbc

SHA256
b9bddc5a44d8e5a241497acbe2b444e3336ac34fdaf44f10cb218f7ca1f2e9dc

SHA512
3d1b6d91d93a526129042c8059cfef17dc78a71dfd94493eb3132adce262348007e59a677d5e30dd9b96275c66e5c7c5b828dd2900d4279b5d6c1cb9911a8921

Download Submit
memory/2288-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2288-1-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2288-2-0x0000000000450000-0x0000000000456000-memory.dmp

Filesize
24KB

Download
memory/2288-4-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2288-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2288-14-0x0000000002480000-0x0000000002490000-memory.dmp

Filesize
64KB

Download
memory/2448-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2448-19-0x0000000000430000-0x0000000000436000-memory.dmp

Filesize
24KB

Download
memory/2448-20-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2448-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads