c6782765fdc4022322e46772e91d1537d1677778e71861d92f792ece569d4f98

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 02:46

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General

Target

2024-05-22_bbad0a393219f201cd20eb3e158a44b0_cryptolocker.exe
Size

39KB
MD5

bbad0a393219f201cd20eb3e158a44b0
SHA1

ed56e0b2919728aafa48baebafef80302407abf2
SHA256

c6782765fdc4022322e46772e91d1537d1677778e71861d92f792ece569d4f98
SHA512

1eae14516a4c4517608e31ae28254a6a3b2c0d8aeed5d53f4819cdb4b55429077a2117f683ee78fa649cb1a19c1c78e73dcbaa795cdab69618863ca8d640bcd6
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan8e:qDdFJy3QMOtEvwDpjjWMl7Tdn8e

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/6100-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/6100-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2484-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2484-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/6100-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/6100-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2484-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2484-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/6100-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/6100-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2484-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2484-28-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_bbad0a393219f201cd20eb3e158a44b0_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-05-22_bbad0a393219f201cd20eb3e158a44b0_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2484 asih.exe

pid	process
2484	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/6100-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/6100-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2484-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2484-28-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_bbad0a393219f201cd20eb3e158a44b0_cryptolocker.exe

description	pid	process	target process
PID 6100 wrote to memory of 2484	6100	2024-05-22_bbad0a393219f201cd20eb3e158a44b0_cryptolocker.exe	asih.exe
PID 6100 wrote to memory of 2484	6100	2024-05-22_bbad0a393219f201cd20eb3e158a44b0_cryptolocker.exe	asih.exe
PID 6100 wrote to memory of 2484	6100	2024-05-22_bbad0a393219f201cd20eb3e158a44b0_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_bbad0a393219f201cd20eb3e158a44b0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_bbad0a393219f201cd20eb3e158a44b0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:6100

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2484

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
39KB

MD5
762258a7455c42c3e47cc2d029ba7022

SHA1
84d16da334dc4b212efc1fc1a00c7d693eea8743

SHA256
64d728d1af049d1724f38665d17ff04d4dd5ba8d9d358e1080a4ac7cb7aaba4d

SHA512
b5fe9521496208294ea28481faa6265fb0af47a58448e832fe1b9b04ec02b8ee19b38fb4cbb495f2103ef1a0680b6b756b5ae8ced53dfa0dff6d712e0a4f6ef8

Download Submit
memory/2484-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2484-21-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2484-27-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2484-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/6100-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/6100-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/6100-2-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/6100-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/6100-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download