2720d40ae1bd742db106ddf0a88da889f67bd243f3a08917b2eddba17726d2e1

Analysis

max time kernel
148s
max time network
160s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 01:29

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General

Target

2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe
Size

60KB
MD5

c529f9ecd9e106b272da396c4c6ec6e1
SHA1

f196eabde97df4c30f161e0317136147ac507ff1
SHA256

2720d40ae1bd742db106ddf0a88da889f67bd243f3a08917b2eddba17726d2e1
SHA512

e84c97f85afbaba634b7eb5c7fa4c70859f8f543c6fba53a965a3ff864bb37532a50e820d0a9adbb22d6c09f7c9cf009a82a0f8f8a9dc55f3226b4eadeea1b00
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaUf3K:z6a+CdOOtEvwDpjQV

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1928-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2200-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2200-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1928-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2200-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2200-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1928-8-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2200-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2200-24-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2200 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe

pid process

1928 2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe

pid	process
2200	asih.exe

pid	process
1928	2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1928-8-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2200-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2200-24-0x0000000000500000-0x0000000000510000-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_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe

description	pid	process	target process
PID 1928 wrote to memory of 2200	1928	2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe	asih.exe
PID 1928 wrote to memory of 2200	1928	2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe	asih.exe
PID 1928 wrote to memory of 2200	1928	2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe	asih.exe
PID 1928 wrote to memory of 2200	1928	2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1928

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2200

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

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

Filesize
60KB

MD5
4e40a3631e6a764b38a447312ceb096b

SHA1
b1d6f458f5af89dc5a161ed0c231133e401e2c5d

SHA256
de985e33b4e2011f0866a9c82aff49ecdc821d3c452ad2f52b7884544d927aa2

SHA512
d0b2561fb68fe85ee9af38faf7903673b35fad72433d1f911f4d47dc9d003a626f335b4edafe89a9f299b3e8cd5743d64e13ecf2e6845b425f5d198a54d11d64

Download Submit
memory/1928-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1928-1-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/1928-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1928-8-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2200-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2200-17-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2200-24-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download