3bbb2c91f03ca847f1af7fb4a91112f07e09176ea8abbf25f585d74258a3ce9c

Analysis

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 19:23

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General

Target

2024-05-21_197271b6c0ce5eeaabadf01f9262dfe7_cryptolocker.exe
Size

47KB
MD5

197271b6c0ce5eeaabadf01f9262dfe7
SHA1

213d63b55103b514cdfb39ecbda641144d423539
SHA256

3bbb2c91f03ca847f1af7fb4a91112f07e09176ea8abbf25f585d74258a3ce9c
SHA512

9f68533630526ab56a88440b307ab5a554b61722748de1f6c9e9e9141875a7fa10de1d268eea3054faa197d5ffb915fd1af4972128d4fef36b1b5b1c2957ddb3
SSDEEP

768:79inqyNR/QtOOtEvwDpjBKccJVODvy3Sp8i:79mqyNhQMOtEvwDpjBzckqSui

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/536-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/536-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4668-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/536-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/536-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4668-18-0x0000000000500000-0x000000000050F000-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_197271b6c0ce5eeaabadf01f9262dfe7_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-21_197271b6c0ce5eeaabadf01f9262dfe7_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4668 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4668	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-21_197271b6c0ce5eeaabadf01f9262dfe7_cryptolocker.exe

description	pid	process	target process
PID 536 wrote to memory of 4668	536	2024-05-21_197271b6c0ce5eeaabadf01f9262dfe7_cryptolocker.exe	asih.exe
PID 536 wrote to memory of 4668	536	2024-05-21_197271b6c0ce5eeaabadf01f9262dfe7_cryptolocker.exe	asih.exe
PID 536 wrote to memory of 4668	536	2024-05-21_197271b6c0ce5eeaabadf01f9262dfe7_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_197271b6c0ce5eeaabadf01f9262dfe7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_197271b6c0ce5eeaabadf01f9262dfe7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:536

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4668

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
47KB

MD5
23116854284dc4555850117ed0b833c5

SHA1
4dfb216dcd1df7aae6de8860467fb52a9edfbb69

SHA256
f9c87612fb73e53f58a9bdea57d0bc2e0d390072d2f1c3461a1d210670bc1f91

SHA512
8e589b8370772e5330c53c861837aaba512250b3d8ce34c0c2635c9953a6ea66b70b539dd19362296d0b01596ee9d2267a091c693a736aed2fafc9599e2f41ea

Download Submit
memory/536-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/536-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/536-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/536-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/536-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4668-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4668-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4668-26-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download