c09aff72ff469772bd65dfcd049fc74e243fae9a91686b16e26a0562519703d2

Analysis

max time kernel
147s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
27-04-2024 22:26

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General

Target

2024-04-27_2c8f03e6b4e0d6b2d7657a86b81b8ca6_cryptolocker.exe
Size

89KB
MD5

2c8f03e6b4e0d6b2d7657a86b81b8ca6
SHA1

51b3c4547201b48e223cb183a5ff5125b13b4000
SHA256

c09aff72ff469772bd65dfcd049fc74e243fae9a91686b16e26a0562519703d2
SHA512

0d0d8e9b27592584c6a9731337d650265b788ebe86f67447ef062e95530b5e4d0f2c654062ad397ee8498a6948496e6facee949af166f42b70e40bbc53cd1d24
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAAL3:n6a+1SEOtEvwDpjYYvQd2P0

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/216-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2816-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/216-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2816-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/216-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2816-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/216-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2816-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/216-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2816-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/216-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2816-27-0x0000000000500000-0x0000000000510000-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:

2024-04-27_2c8f03e6b4e0d6b2d7657a86b81b8ca6_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-04-27_2c8f03e6b4e0d6b2d7657a86b81b8ca6_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2816 asih.exe

pid	process
2816	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/216-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2816-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/216-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2816-27-0x0000000000500000-0x0000000000510000-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:

2024-04-27_2c8f03e6b4e0d6b2d7657a86b81b8ca6_cryptolocker.exe

description	pid	process	target process
PID 216 wrote to memory of 2816	216	2024-04-27_2c8f03e6b4e0d6b2d7657a86b81b8ca6_cryptolocker.exe	asih.exe
PID 216 wrote to memory of 2816	216	2024-04-27_2c8f03e6b4e0d6b2d7657a86b81b8ca6_cryptolocker.exe	asih.exe
PID 216 wrote to memory of 2816	216	2024-04-27_2c8f03e6b4e0d6b2d7657a86b81b8ca6_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-27_2c8f03e6b4e0d6b2d7657a86b81b8ca6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_2c8f03e6b4e0d6b2d7657a86b81b8ca6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:216

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2816

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
89KB

MD5
3c522e1156364c842d134e7f482ac560

SHA1
5f0167804dc2deaef05a6ce0570a2fa5db75f481

SHA256
accecbf532f35e63aef1cb3cc5d518379cd03c73699d13cdac30f7315153071b

SHA512
d0783c5860447dfe660fd3a365f7625f47a158fa2c180f7484442a2d507483a1d69c9e4313083a0b80bf1a96c26fecbd9a78c8149f2ecd890d5095e3f53c6fe1

Download Submit
memory/216-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/216-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/216-2-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/216-9-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/216-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2816-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2816-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2816-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2816-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download