213051b26c7d87f5d97cc3d50dbcff30cf2445de5f6e32b8889ed128326cce9d

Analysis

max time kernel
150s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28-02-2024 20:30

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General

Target

2024-02-28_316cf39dbf97544c0841272ee3568545_cryptolocker.exe
Size

49KB
MD5

316cf39dbf97544c0841272ee3568545
SHA1

a0bfd2d74bbd0f243ac6cd3af267e3c4e92748c6
SHA256

213051b26c7d87f5d97cc3d50dbcff30cf2445de5f6e32b8889ed128326cce9d
SHA512

ecc47ec9ea0c4c85351cc9c50ad1575fcd13f13f1058fb4de0ed407cf8c8c19c9ccd65bc8171c2212ad7ad1615edc7be286cf269f3a5870b1d70d24f32a4235c
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qn8pKI94Y:79mqyNhQMOtEvwDpjBxe8TpX99

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/756-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c0000000226fd-13.dat	CryptoLocker_rule2
behavioral2/memory/756-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/756-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c0000000226fd-13.dat	CryptoLocker_set1
behavioral2/memory/756-17-0x0000000000500000-0x000000000050F000-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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	2024-02-28_316cf39dbf97544c0841272ee3568545_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4428	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 756 wrote to memory of 4428	756	2024-02-28_316cf39dbf97544c0841272ee3568545_cryptolocker.exe	90
PID 756 wrote to memory of 4428	756	2024-02-28_316cf39dbf97544c0841272ee3568545_cryptolocker.exe	90
PID 756 wrote to memory of 4428	756	2024-02-28_316cf39dbf97544c0841272ee3568545_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-02-28_316cf39dbf97544c0841272ee3568545_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_316cf39dbf97544c0841272ee3568545_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:756
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4428

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
50KB

MD5
eff05bd5deb6b7ded51c66d6f7f8582c

SHA1
3bbe230310ae7e3625dda7b95d182d849e14718b

SHA256
5d0ed53fd9b26dccaf2a4697388137eee055724fcbd4ca5c0d8a5c08baf62a75

SHA512
427129d94f7ec0e694b318b98220af691869ce9197f38731ee6b22296ef57c4a7805c7266a369f82cf56d778c9f9f1f660da2410ce0e95df4f4928a2da35d6aa

Download Submit
memory/756-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/756-1-0x0000000000870000-0x0000000000876000-memory.dmp

Filesize
24KB

Download
memory/756-2-0x0000000000870000-0x0000000000876000-memory.dmp

Filesize
24KB

Download
memory/756-3-0x0000000002230000-0x0000000002236000-memory.dmp

Filesize
24KB

Download
memory/756-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4428-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4428-22-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download