fde2380c3987a7c3a013d9be08b94aca0f86aaa914ddf7131edecb197b6269f0

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 19:37

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General

Target

2024-05-21_b2c0b66a9f051ced424bddc0fb0078a9_cryptolocker.exe
Size

66KB
MD5

b2c0b66a9f051ced424bddc0fb0078a9
SHA1

81c8e481e453001cad81af9072d5869b56218020
SHA256

fde2380c3987a7c3a013d9be08b94aca0f86aaa914ddf7131edecb197b6269f0
SHA512

187ca9d5e0e74d07e3bb0d62c2c4c99db1b895ed760b1cfaf670d998c78b1e1fca5bc0de5d6d6776e05b7b612a476cb800a0d66297435ed0c6d9da59484b714c
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xO:1nK6a+qdOOtEvwDpjc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1056-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1056-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4444-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1056-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1056-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4444-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1056-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1056-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4444-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

2024-05-21_b2c0b66a9f051ced424bddc0fb0078a9_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	2024-05-21_b2c0b66a9f051ced424bddc0fb0078a9_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4444 asih.exe

pid	process
4444	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1056-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1056-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4444-26-0x0000000000500000-0x000000000050F311-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 3 IoCs

Processes:

2024-05-21_b2c0b66a9f051ced424bddc0fb0078a9_cryptolocker.exe

description	pid	process	target process
PID 1056 wrote to memory of 4444	1056	2024-05-21_b2c0b66a9f051ced424bddc0fb0078a9_cryptolocker.exe	asih.exe
PID 1056 wrote to memory of 4444	1056	2024-05-21_b2c0b66a9f051ced424bddc0fb0078a9_cryptolocker.exe	asih.exe
PID 1056 wrote to memory of 4444	1056	2024-05-21_b2c0b66a9f051ced424bddc0fb0078a9_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_b2c0b66a9f051ced424bddc0fb0078a9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_b2c0b66a9f051ced424bddc0fb0078a9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1056
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4444

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

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
66KB

MD5
26ca5ee3747f6fbc816ca8ac77b7fd23

SHA1
0fc7a600c0763b997f1d32e9fceb8c9cd9431e30

SHA256
22e891d2a045c8011062b7b9ebe6763bb28a4f12d1be1118da78c268d479d06b

SHA512
884977d111a7306af7a9e03b2c387a82e7c45a22e51e7eb450dc920e85de9f57b7420c69aebb24b5077888d09f49cd339658f5e78ad7cbef883ae23f408400fd

Download Submit
memory/1056-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1056-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/1056-2-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/1056-9-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/1056-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4444-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4444-25-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4444-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download