f4f920878715cb4b837b77f94cf976fcdd8aeba3d8da654269447df6838f43e1

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
10-05-2024 21:28

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General

Target

2024-05-10_717c08d789aa2434d03267107e04bfff_cryptolocker.exe
Size

51KB
MD5

717c08d789aa2434d03267107e04bfff
SHA1

73a7e48e8d8d5e01d40900cd52266fae42a8447c
SHA256

f4f920878715cb4b837b77f94cf976fcdd8aeba3d8da654269447df6838f43e1
SHA512

4825ff712edb4f210c473d97a5c4e01b60d111cb6e28da4829b010bf195bfda2b366c55b6f98baa69c7f8bebfd7a6efe0ab24deed4787ad91c74209504424f7b
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qnTHGf0:79mqyNhQMOtEvwDpjBxe8GGf0

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3076-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000002297c-13.dat	CryptoLocker_rule2
behavioral2/memory/4700-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3076-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3076-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000600000002297c-13.dat	CryptoLocker_set1
behavioral2/memory/4700-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3076-18-0x0000000000500000-0x000000000050F000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-05-10_717c08d789aa2434d03267107e04bfff_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4700	asih.exe

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

description	pid	Process	procid_target
PID 3076 wrote to memory of 4700	3076	2024-05-10_717c08d789aa2434d03267107e04bfff_cryptolocker.exe	85
PID 3076 wrote to memory of 4700	3076	2024-05-10_717c08d789aa2434d03267107e04bfff_cryptolocker.exe	85
PID 3076 wrote to memory of 4700	3076	2024-05-10_717c08d789aa2434d03267107e04bfff_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-10_717c08d789aa2434d03267107e04bfff_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_717c08d789aa2434d03267107e04bfff_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3076
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4700

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
51KB

MD5
341b1e50b368b33a212a4838c0b16510

SHA1
6505598192b9a91bfa9e91f0f385efe3686c5eae

SHA256
396ff774dd7d5f1d036713e70cd68a457ded57a30427c5fc61030c53bb38ec54

SHA512
11e237fa318e0e9ecc377c519044cafdd7067a6025b63bab20a4a7d1e8c5be39d9f6849aa82db093e1626f80bcdfde9007720700a3351a15c0fdb2fd628a258f

Download Submit
memory/3076-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3076-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3076-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3076-9-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3076-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4700-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4700-20-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4700-21-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download