db0420194c3838bbe6594eb967885752838b09946e57e76c300a576061c986db

Analysis

max time kernel
149s
max time network
151s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 02:22

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General

Target

2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe
Size

24KB
MD5

0cd7e81faf9c27f078ec2bce27242d2c
SHA1

ca2ff83a6b5419544506d35b330ccd3641084f36
SHA256

db0420194c3838bbe6594eb967885752838b09946e57e76c300a576061c986db
SHA512

b19126af58903c9110d39366003668871d1ecf81cd1574355be92d857f2b5fac7f8beecf7d7ef984143d5cd05264a505627862cd436e95ce0d4b24d78774e6e6
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJ2C:bVCPwFRo6CpwXFXSqQXfjAsJ9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2268-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral1/memory/2268-16-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1736-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1736-26-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2268-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\hasfj.exe	UPX
behavioral1/memory/2268-16-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/1736-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/1736-26-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

1736 hasfj.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe

pid process

2268 2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe

pid	process
1736	hasfj.exe

pid	process
2268	2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2268-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\hasfj.exe	upx
behavioral1/memory/2268-16-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/1736-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/1736-26-0x0000000008000000-0x000000000800E000-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_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe

description	pid	process	target process
PID 2268 wrote to memory of 1736	2268	2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe	hasfj.exe
PID 2268 wrote to memory of 1736	2268	2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe	hasfj.exe
PID 2268 wrote to memory of 1736	2268	2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe	hasfj.exe
PID 2268 wrote to memory of 1736	2268	2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2268

C:\Users\Admin\AppData\Local\Temp\hasfj.exe
"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
2⤵
- Executes dropped EXE
PID:1736

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\hasfj.exe
Filesize
24KB

MD5
07099e91790eb8dceb7f4f84c01b3dc7

SHA1
f4c115b51edfe93ee34a1a69d72219e34f3cdb23

SHA256
742b9e0c76806a5b630f26e112126270b4320f90037fa235c1c14627028c6272

SHA512
b0d6a4a26959724c4004cffb14452cdf512638ccb8d6de49f55a89cc3cd79971f0c2a6b68faad88ab917adc5094413c3fb10fc54cf6cbe24dabec6735e799cd6

Download Submit
memory/1736-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1736-26-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2268-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2268-1-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2268-2-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2268-9-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2268-16-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download