fa1933caa85395a686261f793bafab4febfa2e83f7319d57fba44a3d6f574b4b

Analysis

max time kernel
160s
max time network
170s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
14/03/2024, 21:35

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General

Target

2024-03-14_8b213905726284cc45212a053c011e46_cryptolocker.exe
Size

149KB
MD5

8b213905726284cc45212a053c011e46
SHA1

50f3f183fd4af6fe3791b689f0c7c87e9073f9f5
SHA256

fa1933caa85395a686261f793bafab4febfa2e83f7319d57fba44a3d6f574b4b
SHA512

59b8a1da214f559d5e64ffccd23d7ad70e9f9ef90400e651d42c8d60efeec7d37f234c2129385b5c1885da40cf2da59341b32d49aedcc1718092003f96131edd
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp699GNtL1e2K:z6a+CdOOtEvwDpjcz5

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/100-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c0000000226fd-13.dat	CryptoLocker_rule2
behavioral2/memory/100-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4004-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/100-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c0000000226fd-13.dat	CryptoLocker_set1
behavioral2/memory/100-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4004-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/100-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c0000000226fd-13.dat	UPX
behavioral2/memory/100-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4004-26-0x0000000000500000-0x0000000000510000-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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	2024-03-14_8b213905726284cc45212a053c011e46_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4004	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/100-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c0000000226fd-13.dat	upx
behavioral2/memory/100-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4004-26-0x0000000000500000-0x0000000000510000-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 100 wrote to memory of 4004	100	2024-03-14_8b213905726284cc45212a053c011e46_cryptolocker.exe	91
PID 100 wrote to memory of 4004	100	2024-03-14_8b213905726284cc45212a053c011e46_cryptolocker.exe	91
PID 100 wrote to memory of 4004	100	2024-03-14_8b213905726284cc45212a053c011e46_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-03-14_8b213905726284cc45212a053c011e46_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_8b213905726284cc45212a053c011e46_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:100
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4004

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
149KB

MD5
f62432f32c88354e561f9cc3d0672006

SHA1
39b6dd86ae4ac7698746fc7d1f96016937035b73

SHA256
23b0053b4680b87074b5663040693ad1f50a00e1fe278eabac0a71b7b3f2504d

SHA512
532e204d715c828c409c647d86a3b0ddd3a8e2578c648a57f0e349aa7897a159824533b25231a6a3611ced6de582c3a12a0719c2c3040819e68cd247cf29c151

Download Submit
memory/100-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/100-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/100-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/100-3-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/100-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4004-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4004-18-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/4004-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download