0c19861a669e64d2d393372dd1201468ca772d1264a02bfd673704cf15c8021f

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 20:03

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General

Target

2024-05-22_bad26cb3a73258084d90a854b6e37532_cryptolocker.exe
Size

39KB
MD5

bad26cb3a73258084d90a854b6e37532
SHA1

8a5984a045a6683cc74607708fa1da65839dcf0e
SHA256

0c19861a669e64d2d393372dd1201468ca772d1264a02bfd673704cf15c8021f
SHA512

543ff3db0d9c270ea1c2dc7f7a0c23163e4d9001a83380738a95d2a3aa2ef51ad84bfabf8a2ae0a5a56e16ea9c61ee361c7cf5cef9e2dd8ae37cc06994817410
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/T:qDdFJy3QMOtEvwDpjjWMl7Ty

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1224-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1224-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2968-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2968-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1224-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1224-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2968-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2968-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1224-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1224-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2968-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2968-28-0x0000000000500000-0x0000000000510000-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_bad26cb3a73258084d90a854b6e37532_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-05-22_bad26cb3a73258084d90a854b6e37532_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2968 asih.exe

pid	process
2968	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1224-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1224-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2968-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2968-28-0x0000000000500000-0x0000000000510000-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_bad26cb3a73258084d90a854b6e37532_cryptolocker.exe

description	pid	process	target process
PID 1224 wrote to memory of 2968	1224	2024-05-22_bad26cb3a73258084d90a854b6e37532_cryptolocker.exe	asih.exe
PID 1224 wrote to memory of 2968	1224	2024-05-22_bad26cb3a73258084d90a854b6e37532_cryptolocker.exe	asih.exe
PID 1224 wrote to memory of 2968	1224	2024-05-22_bad26cb3a73258084d90a854b6e37532_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_bad26cb3a73258084d90a854b6e37532_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_bad26cb3a73258084d90a854b6e37532_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1224

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2968

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
732533633a88b66151ffc64e16423992

SHA1
a5a62e53cca7f95728e265264e5bb92a7caca7a4

SHA256
473bcea78cab1237236f9f584b9845ba3730a67ab67a735c4bcf20ee94c0a93b

SHA512
8b35ac1e0a3ba76b9be8826c9c69b5368a3fc7eac869f27b45fa83355a6006bda99174a3c66c1745001d400d159c6e2de9c257232904c9fa434d47761e0b57ae

Download Submit
memory/1224-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1224-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/1224-7-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1224-9-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/1224-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2968-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2968-21-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2968-27-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2968-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download