3af67795d981618e9d5623e15d86aff022c545c7814b6a40d3313809b104f8d3

Analysis

max time kernel
134s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 17:54

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General

Target

2024-02-12_e5a55d1a1176a509b8df6219f6a754ec_cryptolocker.exe
Size

37KB
MD5

e5a55d1a1176a509b8df6219f6a754ec
SHA1

0fa67cc7160ee949289ca757af9c13ebe8f17826
SHA256

3af67795d981618e9d5623e15d86aff022c545c7814b6a40d3313809b104f8d3
SHA512

a1339cbcf23a98a98e4f7518de6b474773aebd8c3c9ce2d7bedd738044034fa73d252e5c3db8e6c347c7499ae504aaa043ca91422366bd577f3aa1fa15208ecb
SSDEEP

768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6WaJIOc+UPPEkLUK:YGzl5wjRQBBOsP1QMOtEvwDpjgarrkL9

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3132-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3132-19-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3132-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3132-19-0x0000000000500000-0x000000000050B000-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:

2024-02-12_e5a55d1a1176a509b8df6219f6a754ec_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-12_e5a55d1a1176a509b8df6219f6a754ec_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1248 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1248	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_e5a55d1a1176a509b8df6219f6a754ec_cryptolocker.exe

description	pid	process	target process
PID 3132 wrote to memory of 1248	3132	2024-02-12_e5a55d1a1176a509b8df6219f6a754ec_cryptolocker.exe	asih.exe
PID 3132 wrote to memory of 1248	3132	2024-02-12_e5a55d1a1176a509b8df6219f6a754ec_cryptolocker.exe	asih.exe
PID 3132 wrote to memory of 1248	3132	2024-02-12_e5a55d1a1176a509b8df6219f6a754ec_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_e5a55d1a1176a509b8df6219f6a754ec_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_e5a55d1a1176a509b8df6219f6a754ec_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3132

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1248

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
37KB

MD5
323f19aeca15936427239323cdc74c2e

SHA1
971ed20edd9877603cbfc0da0c6e8ac39567f3aa

SHA256
bb1965d6ea2bb42f23e4bef5bdd3e576e0aa18b7ae005b93fdf5dfea5fe4617c

SHA512
7f71c8e71432bb9c09d650fb16201c006924f06902aa6215c61f48f9a66c1b3afc7de8722f3399324e704c69f2929778edfbcd7825646edc380cd7f6ac9597de

Download Submit
memory/1248-20-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3132-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3132-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/3132-2-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/3132-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3132-19-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download