d4128c5f4d7f8329dda821c7b4bac8585d42b345622e8aa71f10981b92897eed

Analysis

max time kernel
142s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 17:42

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General

Target

2024-02-12_8597c90d1c11c6c769ce9568704cd1a7_cryptolocker.exe
Size

62KB
MD5

8597c90d1c11c6c769ce9568704cd1a7
SHA1

f4df568c7cd0c2038633d16b26e3cb297a8fde03
SHA256

d4128c5f4d7f8329dda821c7b4bac8585d42b345622e8aa71f10981b92897eed
SHA512

97264c7a0a3cc636b4ed870fb306e3bdc20a45865349c377dd4189330cae6ec97db16cfa6d4f5d0d2e554ade815cf0ab1045b7dd82cdce689ad9f4ba57022612
SSDEEP

768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mnVlD:zj+soPSMOtEvwDpj4kpmeLmn3D

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1248-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\misid.exe	CryptoLocker_rule2
behavioral2/memory/1248-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1936-54-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1248-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\misid.exe	CryptoLocker_set1
behavioral2/memory/1248-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1936-54-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1248-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\misid.exe	UPX
behavioral2/memory/1248-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1936-54-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

2024-02-12_8597c90d1c11c6c769ce9568704cd1a7_cryptolocker.exemisid.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	2024-02-12_8597c90d1c11c6c769ce9568704cd1a7_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

Processes:

misid.exe

pid process

1936 misid.exe

pid	process
1936	misid.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1248-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\misid.exe	upx
behavioral2/memory/1248-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1936-54-0x0000000000500000-0x0000000000510000-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:

2024-02-12_8597c90d1c11c6c769ce9568704cd1a7_cryptolocker.exe

description	pid	process	target process
PID 1248 wrote to memory of 1936	1248	2024-02-12_8597c90d1c11c6c769ce9568704cd1a7_cryptolocker.exe	misid.exe
PID 1248 wrote to memory of 1936	1248	2024-02-12_8597c90d1c11c6c769ce9568704cd1a7_cryptolocker.exe	misid.exe
PID 1248 wrote to memory of 1936	1248	2024-02-12_8597c90d1c11c6c769ce9568704cd1a7_cryptolocker.exe	misid.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_8597c90d1c11c6c769ce9568704cd1a7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_8597c90d1c11c6c769ce9568704cd1a7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1248

C:\Users\Admin\AppData\Local\Temp\misid.exe
"C:\Users\Admin\AppData\Local\Temp\misid.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
PID:1936

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\misid.exe

Filesize
62KB

MD5
e79242a7df3b9d49697d19a4862087f2

SHA1
2debbcb2373241a73e8c65322d9e89378fd3e02e

SHA256
94d3e7452f4c8b90e71db2972c8e713f5d7f8b412e6c74f4383beaa2e0772125

SHA512
af18023772701d5f64a42f130f8376a2c698e791e0170f8e03a7d41803d1a1903ae82af1b7b35057abd2cbc2ecbaf2d10f3c08286d7b3b9c36baa2ff072d689c

Download Submit
memory/1248-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1248-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1248-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1248-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/1248-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1936-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/1936-24-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/1936-54-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download