ac132145e5adeb02e6dfb3f8cf61eadf8acfe2104212cc5380f363685cb9e2fc

Analysis

max time kernel
148s
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 15:36

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General

Target

2024-05-21_524c61feeaae99750199ce8988d18e7e_cryptolocker.exe
Size

45KB
MD5

524c61feeaae99750199ce8988d18e7e
SHA1

c9915cd169bb78c9db38f221280f9d98540d51ae
SHA256

ac132145e5adeb02e6dfb3f8cf61eadf8acfe2104212cc5380f363685cb9e2fc
SHA512

cdcc62b9b3b5f43e37647882e1ca31aaf2677fc1968371eca80aaf73387ad9bbca9ae654c7f1c16534fb7741fe6339ed005e8363b7cf35352303e8955fcaff79
SSDEEP

768:P6LsoEEeegiZPvEhHS5+Mh/QtOOtEvwDpjBpaD3TUogs/VXpAPh+q:P6QFElP6k+MRQMOtEvwDpjBQpVXK+q

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3976-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3976-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2616-26-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3976-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3976-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2616-26-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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_524c61feeaae99750199ce8988d18e7e_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-05-21_524c61feeaae99750199ce8988d18e7e_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2616 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2616	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-21_524c61feeaae99750199ce8988d18e7e_cryptolocker.exe

description	pid	process	target process
PID 3976 wrote to memory of 2616	3976	2024-05-21_524c61feeaae99750199ce8988d18e7e_cryptolocker.exe	asih.exe
PID 3976 wrote to memory of 2616	3976	2024-05-21_524c61feeaae99750199ce8988d18e7e_cryptolocker.exe	asih.exe
PID 3976 wrote to memory of 2616	3976	2024-05-21_524c61feeaae99750199ce8988d18e7e_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_524c61feeaae99750199ce8988d18e7e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_524c61feeaae99750199ce8988d18e7e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3976

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2616

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
46KB

MD5
5eee4f5e69e8cd908d82c3f68c396830

SHA1
3826f609eff0417ed3aaf79371c7b8bfc01c7ecf

SHA256
a69e358485ac8388934dde1c27c999e07198eba560dcca40e84d17a956b94d35

SHA512
e022a883fcda13801319802886d47fd2d08f1b594270cb0545c970e15fbf47845ee31ad924a039e6ea1f22d4ce1256d7de84a4215c7894fdaaebe86b67710892

Download Submit
memory/2616-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2616-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2616-26-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3976-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3976-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3976-9-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3976-2-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3976-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download