e44224d516f3b2b56f8894da99a2c4d2824105c103296f0b5fb4068d2822c3e1

Analysis

max time kernel
149s
max time network
168s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
06/06/2024, 23:37

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General

Target

2024-06-06_bf490c3e2353af025e5004873ba3e427_cryptolocker.exe
Size

40KB
MD5

bf490c3e2353af025e5004873ba3e427
SHA1

fee4e5896e9d11a67a1dfa25c919847e68aa1fb2
SHA256

e44224d516f3b2b56f8894da99a2c4d2824105c103296f0b5fb4068d2822c3e1
SHA512

0caf7f94ec183406c595ef22a56980641958907c213fee840e8dd9ca02709d4e87ede07556ae718e14aa2e5ff5542b4a970e3ddc1349639af88b66838546375e
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYlQ:qDdFJy3QMOtEvwDpjjWMl7T6Q

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4352-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000500000002326f-13.dat	CryptoLocker_rule2
behavioral2/memory/4352-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3532-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3532-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4352-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000500000002326f-13.dat	CryptoLocker_set1
behavioral2/memory/4352-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3532-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3532-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4352-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000500000002326f-13.dat	UPX
behavioral2/memory/4352-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3532-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3532-27-0x0000000000500000-0x0000000000510000-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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-06-06_bf490c3e2353af025e5004873ba3e427_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3532	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4352-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000500000002326f-13.dat	upx
behavioral2/memory/4352-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3532-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3532-27-0x0000000000500000-0x0000000000510000-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 4352 wrote to memory of 3532	4352	2024-06-06_bf490c3e2353af025e5004873ba3e427_cryptolocker.exe	82
PID 4352 wrote to memory of 3532	4352	2024-06-06_bf490c3e2353af025e5004873ba3e427_cryptolocker.exe	82
PID 4352 wrote to memory of 3532	4352	2024-06-06_bf490c3e2353af025e5004873ba3e427_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-06_bf490c3e2353af025e5004873ba3e427_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-06_bf490c3e2353af025e5004873ba3e427_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4352
- 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
40KB

MD5
cf4b1ee5ac1587e463f996c200254f50

SHA1
d579991b589ce7cb2c2cc88426b43726b15369e4

SHA256
ed2fc19f4b042465e8ee194a9c4de188e5f42c1ea38ec993336516b95262c457

SHA512
ffcf8fa14b772c86a0e868fea711ece95d3f85f838bebddbc96bfa2b6bee03d66f1f3c7f4959829937b0a40470de8e1da4cfeafd4e940d29a7dd5163f1df29d3

Download Submit
memory/3532-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3532-21-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3532-20-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/3532-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4352-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4352-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4352-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4352-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4352-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download