57ed788d93e70b4ecd4b371261f230dbf010878247fee02a97d5342446ec7fe5

Analysis

max time kernel
150s
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 02:30

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General

Target

2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe
Size

52KB
MD5

4128b390510f077b44e9fa8f6386e29d
SHA1

61420ea5ea4adc341c41e17a5f80aaa2eed553a8
SHA256

57ed788d93e70b4ecd4b371261f230dbf010878247fee02a97d5342446ec7fe5
SHA512

905a95c1a528b171e46f30bdfd9f450139d021b0d3b1d7118978ddf6264fc7199e8e0dd5bdec59fe8d55d87f9c6e994002b11037685b08ff1f741954b14fda33
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOmK:z6QFElP6n+gKmddpMOtEvwDpj31imK

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2908-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4980-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2908-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4980-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2908-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4980-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2908-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4980-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2908-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4980-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2908-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4980-27-0x0000000000500000-0x0000000000510000-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_4128b390510f077b44e9fa8f6386e29d_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_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4980 asih.exe

pid	process
4980	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2908-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4980-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2908-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4980-27-0x0000000000500000-0x0000000000510000-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_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe

description	pid	process	target process
PID 2908 wrote to memory of 4980	2908	2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe	asih.exe
PID 2908 wrote to memory of 4980	2908	2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe	asih.exe
PID 2908 wrote to memory of 4980	2908	2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_4128b390510f077b44e9fa8f6386e29d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2908

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4980

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
52KB

MD5
652802d153b877f727405c4a9a8a0454

SHA1
a5e3002dec2dae8729c0be926d1679ef2848978f

SHA256
538b84de6b3f34de4b562a8b47ebd56bdca3ee0499ee916cbc3d7a0a3f672a3a

SHA512
8b561c1f320a9beb2b89b626809b71bd299be8916ec5d4d6dbe13e7d2191297d7ca18fe2ce4beb18464cea696bbcd60385d7c1e97c8c2a250819d80c7d0c67b1

Download Submit
memory/2908-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2908-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2908-8-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2908-2-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/2908-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4980-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4980-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4980-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4980-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download