73f5847a0a6f8a0a3fe79d000295b71aee50b784299321f934cede6b035f5473

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
08/05/2024, 04:39

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General

Target

2024-05-08_7ff56c7f3fd6e142d21b48974db40ef9_cryptolocker.exe
Size

68KB
MD5

7ff56c7f3fd6e142d21b48974db40ef9
SHA1

5b479f652936e8d8bf9d0a201691f5cf8357150f
SHA256

73f5847a0a6f8a0a3fe79d000295b71aee50b784299321f934cede6b035f5473
SHA512

147792edb591b443f64594965964cf9a7ea57786af0d2245b4dcc65b94e64fe5c05bf3ba6aa3598dc924c4ee7689c2c28a4947b1ed4f1bab0d049048ec96b371
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1Pg:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAg

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4776-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023ae5-13.dat	CryptoLocker_rule2
behavioral2/memory/4776-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3532-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4776-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d000000023ae5-13.dat	CryptoLocker_set1
behavioral2/memory/4776-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3532-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4776-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000d000000023ae5-13.dat	UPX
behavioral2/memory/4776-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3532-27-0x0000000000500000-0x000000000050F000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation	2024-05-08_7ff56c7f3fd6e142d21b48974db40ef9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3532	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4776-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000d000000023ae5-13.dat	upx
behavioral2/memory/4776-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3532-27-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 4776 wrote to memory of 3532	4776	2024-05-08_7ff56c7f3fd6e142d21b48974db40ef9_cryptolocker.exe	83
PID 4776 wrote to memory of 3532	4776	2024-05-08_7ff56c7f3fd6e142d21b48974db40ef9_cryptolocker.exe	83
PID 4776 wrote to memory of 3532	4776	2024-05-08_7ff56c7f3fd6e142d21b48974db40ef9_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-08_7ff56c7f3fd6e142d21b48974db40ef9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-08_7ff56c7f3fd6e142d21b48974db40ef9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4776
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3532

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
68KB

MD5
e0fbabfdf0ce0a68557addb8df0cd719

SHA1
437bd59c2570556f1f552925d555afd13b735c9d

SHA256
94418b14bfe4698ab18c3995e924e1576aacfc85a8216f16030924950a4d92a9

SHA512
0e6ceb5e0d092f37dffa2c4b8c952e31619412a26c733c09a39c74b9b770c6abea0de757244438741b97b48c867423ca594343fe4c58679abe7106e3ada0ae68

Download Submit
memory/3532-20-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3532-26-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3532-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4776-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4776-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4776-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4776-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4776-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download