e14b6d16b5abfea2340041ddb5c07f7044594a3b3b475d56fbacafbad4a684d0

Analysis

max time kernel
148s
max time network
151s
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 02:27

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General

Target

2024-05-23_34128900a64639214b067dfafa9a116c_cryptolocker.exe
Size

39KB
MD5

34128900a64639214b067dfafa9a116c
SHA1

77e294d25e328299744e5669717b2c34f2e6e3fa
SHA256

e14b6d16b5abfea2340041ddb5c07f7044594a3b3b475d56fbacafbad4a684d0
SHA512

1413486fafe093535b2fbcd6e9fda2a22185a33bfdbc84c234cab06146c43ee1132a2b6e1dfcf3667bf52ad4022799b5b2eca5800be25d72ce5bd5040902b30a
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYfFtx:qDdFJy3QMOtEvwDpjjWMl7Tk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5040-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3980-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5040-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3980-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5040-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3980-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5040-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3980-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5040-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3980-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5040-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3980-28-0x0000000000500000-0x0000000000510000-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:

2024-05-23_34128900a64639214b067dfafa9a116c_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-23_34128900a64639214b067dfafa9a116c_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3980 asih.exe

pid	process
3980	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/5040-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3980-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5040-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3980-28-0x0000000000500000-0x0000000000510000-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:

2024-05-23_34128900a64639214b067dfafa9a116c_cryptolocker.exe

description	pid	process	target process
PID 5040 wrote to memory of 3980	5040	2024-05-23_34128900a64639214b067dfafa9a116c_cryptolocker.exe	asih.exe
PID 5040 wrote to memory of 3980	5040	2024-05-23_34128900a64639214b067dfafa9a116c_cryptolocker.exe	asih.exe
PID 5040 wrote to memory of 3980	5040	2024-05-23_34128900a64639214b067dfafa9a116c_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_34128900a64639214b067dfafa9a116c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_34128900a64639214b067dfafa9a116c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5040

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3980

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
39KB

MD5
254ca55b90cb8b286320d8b3225736a2

SHA1
35fdb2fce46b4999565dba8b6c76f83f7ab98b54

SHA256
e7ada9b0a0c1a4b7b3aa830d2bc53ecf65419897e99d7412bae4ad34cdbb16a3

SHA512
c4d43520392bf57bd2a49ccb9f042b16e3d1236b3b815370fe7d8baf09db81eaa12b2605dc4a931677212c12f9e8177041445e5755cd0299499726d974e9e7be

Download Submit
memory/3980-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3980-21-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3980-27-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3980-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5040-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5040-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5040-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5040-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5040-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download