977bc2c736444acee073af769ae294c7f0c89beedc7faee7e1b34ba5dd1314dc

Analysis

max time kernel
148s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 01:29

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General

Target

2024-05-23_c9be0a4b82f4d226b844317cb2fd3b5a_cryptolocker.exe
Size

47KB
MD5

c9be0a4b82f4d226b844317cb2fd3b5a
SHA1

98aafdef80e69014b8eba7371df31816ab8e33c4
SHA256

977bc2c736444acee073af769ae294c7f0c89beedc7faee7e1b34ba5dd1314dc
SHA512

b7f3acc7893793e226c459fd0db73fbddc53dd19b3dfc18e20b99f398eb02e9e5cded869058d8db63a9aa4d80d68c3dc10ee692a20dae201bed16b331baa15c7
SSDEEP

384:e/4wODQkzonAYsju5N/surDQtOOtEvwDpjqIGROqS/WccJVJwi2B5oCCM8CLW2Vw:79inqyNR/QtOOtEvwDpjBKccJVODvy3J

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3968-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2076-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3968-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3968-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2076-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3968-18-0x0000000000500000-0x000000000050F000-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

Processes:

2024-05-23_c9be0a4b82f4d226b844317cb2fd3b5a_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-23_c9be0a4b82f4d226b844317cb2fd3b5a_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2076 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2076	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_c9be0a4b82f4d226b844317cb2fd3b5a_cryptolocker.exe

description	pid	process	target process
PID 3968 wrote to memory of 2076	3968	2024-05-23_c9be0a4b82f4d226b844317cb2fd3b5a_cryptolocker.exe	asih.exe
PID 3968 wrote to memory of 2076	3968	2024-05-23_c9be0a4b82f4d226b844317cb2fd3b5a_cryptolocker.exe	asih.exe
PID 3968 wrote to memory of 2076	3968	2024-05-23_c9be0a4b82f4d226b844317cb2fd3b5a_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_c9be0a4b82f4d226b844317cb2fd3b5a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_c9be0a4b82f4d226b844317cb2fd3b5a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3968

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2076

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4036,i,17096020621006928097,15544233752327415349,262144 --variations-seed-version --mojo-platform-channel-handle=1320 /prefetch:8
1⤵
PID:5080

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
48KB

MD5
d6a839dad2ad0bccb06625e21d7ea909

SHA1
674410eccb183e1b5fc7b9a13e1e56731dc3318c

SHA256
e6853a2b92b2225f5e2a352c9e2f91fd95abd45c15befb5f59db364969e33ae1

SHA512
44e25a645c7dae82abf4c35336077b8698e191b4177c5f8f568865f41d817e2a8f1b27268a3a82055e9e77d7a8bf0bdd0edb11b418738f4590e85e30a3ee35fe

Download Submit
memory/2076-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2076-20-0x0000000000820000-0x0000000000826000-memory.dmp

Filesize
24KB

Download
memory/2076-26-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3968-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3968-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3968-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3968-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3968-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download