243c8d846ec9a8f768e05693760eb7c3f55efec67fd6bdb2aee739fca18c85f0

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
09/04/2024, 15:45

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General

Target

2024-04-08_22686ee60bab260e1057cf8c018ba374_cryptolocker.exe
Size

39KB
MD5

22686ee60bab260e1057cf8c018ba374
SHA1

f681ffe6f72c732c2d04da15f3bfb63c5d95cbfb
SHA256

243c8d846ec9a8f768e05693760eb7c3f55efec67fd6bdb2aee739fca18c85f0
SHA512

32cc337c0f7a55091b3426512fecf2e34f9d8ecea70b8dacbd4c827e8b18bcabc867cc50be32243a480c5af7c23e7dc37fc83a157dde876251b29f0a55963473
SSDEEP

768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6WaJIOc+UPPEkLoDFx:YGzl5wjRQBBOsP1QMOtEvwDpjgarrkLG

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/5100-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002320b-13.dat	CryptoLocker_rule2
behavioral2/memory/5100-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/5100-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002320b-13.dat	CryptoLocker_set1
behavioral2/memory/5100-17-0x0000000000500000-0x000000000050B000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-04-08_22686ee60bab260e1057cf8c018ba374_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3864	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 5100 wrote to memory of 3864	5100	2024-04-08_22686ee60bab260e1057cf8c018ba374_cryptolocker.exe	86
PID 5100 wrote to memory of 3864	5100	2024-04-08_22686ee60bab260e1057cf8c018ba374_cryptolocker.exe	86
PID 5100 wrote to memory of 3864	5100	2024-04-08_22686ee60bab260e1057cf8c018ba374_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-08_22686ee60bab260e1057cf8c018ba374_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-08_22686ee60bab260e1057cf8c018ba374_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5100
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3864

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
39KB

MD5
6ca50440ee918999dd9672040af6844c

SHA1
ce2f8832422363c3825b20c4a9776ce4bf3fe5ce

SHA256
99e671b0f04963158022d18056154b5608212613314ee43d121db8603f8a5aec

SHA512
c5fa64b7f910dc4b396ff240cb9db97796dd5e5944878e18d40c9ed7e7eceae7d39775098af13f8c5de2b4603a9e5dbf15983d184f5c830df4fd4006eb30f431

Download Submit
memory/3864-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3864-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/5100-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/5100-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5100-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5100-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5100-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download