5730260112813c0513757bc8782a73c26a12d971b4a2f8c1e0d27cb36ef7856f

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 02:27

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General

Target

2024-05-22_3c16b2af9e7d69a05beb77018e2b0853_cryptolocker.exe
Size

79KB
MD5

3c16b2af9e7d69a05beb77018e2b0853
SHA1

c22069e7960d1e8e9039047ef81a8602cdfb453d
SHA256

5730260112813c0513757bc8782a73c26a12d971b4a2f8c1e0d27cb36ef7856f
SHA512

6959736b7957cc449817bc2c18f41b0c79c38a6018c5ed7a251f46c1bf6ccc634c9f110efdc949a5fe6c2ca4e4e699cc3bc47cea2c41b78d369e2cf416e9d5e7
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJcRg:T6a+rdOOtEvwDpjNtF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4900-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3116-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4900-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3116-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4900-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3116-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4900-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3116-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4900-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3116-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4900-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3116-27-0x0000000000500000-0x0000000000510000-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_3c16b2af9e7d69a05beb77018e2b0853_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-22_3c16b2af9e7d69a05beb77018e2b0853_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3116 asih.exe

pid	process
3116	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4900-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3116-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4900-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3116-27-0x0000000000500000-0x0000000000510000-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_3c16b2af9e7d69a05beb77018e2b0853_cryptolocker.exe

description	pid	process	target process
PID 4900 wrote to memory of 3116	4900	2024-05-22_3c16b2af9e7d69a05beb77018e2b0853_cryptolocker.exe	asih.exe
PID 4900 wrote to memory of 3116	4900	2024-05-22_3c16b2af9e7d69a05beb77018e2b0853_cryptolocker.exe	asih.exe
PID 4900 wrote to memory of 3116	4900	2024-05-22_3c16b2af9e7d69a05beb77018e2b0853_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_3c16b2af9e7d69a05beb77018e2b0853_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_3c16b2af9e7d69a05beb77018e2b0853_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4900

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3116

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
79KB

MD5
cf31623f5a571cbd5155c6ef4d45582e

SHA1
848d7619ced7531e77aec13576c8cd8f4f4f099d

SHA256
3055443c5ec9befaa8db349ef4093652f47dc95c91b2d9877e42ebc3603851c5

SHA512
e7d22f4c89f7e226548bf7962e7731fb1873d0b4efe234fa9165f1a139403cd5a31d858989d659ef26397fbc7c2e98eb073d10e3e91b20c70363c10699bf1459

Download Submit
memory/3116-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3116-26-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3116-19-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

Filesize
24KB

Download
memory/3116-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4900-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4900-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4900-2-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4900-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4900-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download