6b7e209aef90f5586652803cce623f3bead4e61894b6be52d1749d24b289838b

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
21-05-2024 15:41

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General

Target

2024-05-21_046829dfcb6db45ad7d301adeede36c9_cryptolocker.exe
Size

87KB
MD5

046829dfcb6db45ad7d301adeede36c9
SHA1

2b3047cae1d3ab3b4081d9ff6d3b8c0fc7ea5357
SHA256

6b7e209aef90f5586652803cce623f3bead4e61894b6be52d1749d24b289838b
SHA512

07c16d46bd5f1ee1056a44d0ca3913b0baa5bed2045e431441a735cc5e8d9f2ed44eafb600a3fc3f7240a0fb88d6f08b68bc547b3ce427c063f6c19b56efe936
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT7vM5Rd:T6a+rdOOtEvwDpjNQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4856-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/316-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/316-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4856-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/316-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/316-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4856-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/316-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/316-27-0x0000000000500000-0x0000000000510000-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:

2024-05-21_046829dfcb6db45ad7d301adeede36c9_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-21_046829dfcb6db45ad7d301adeede36c9_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

316 asih.exe

pid	process
316	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4856-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/316-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/316-27-0x0000000000500000-0x0000000000510000-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:

2024-05-21_046829dfcb6db45ad7d301adeede36c9_cryptolocker.exe

description	pid	process	target process
PID 4856 wrote to memory of 316	4856	2024-05-21_046829dfcb6db45ad7d301adeede36c9_cryptolocker.exe	asih.exe
PID 4856 wrote to memory of 316	4856	2024-05-21_046829dfcb6db45ad7d301adeede36c9_cryptolocker.exe	asih.exe
PID 4856 wrote to memory of 316	4856	2024-05-21_046829dfcb6db45ad7d301adeede36c9_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_046829dfcb6db45ad7d301adeede36c9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_046829dfcb6db45ad7d301adeede36c9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4856

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:316

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
87KB

MD5
fcb0d53b589f60f6b6f69cc8d0a380cd

SHA1
33a4d850c96708ec8d5ba1da08760a13a1894de3

SHA256
220192b71c84c6b9d0b46cfd9fd7beae49485e8439c63f77e037929dffa2f701

SHA512
84ca292f7c5d796a863688c51381537b61463897eb4401cb2ed40cb8acf4b5aed5051b1312116812d2b86b32094f4bd9a19ad6ba39dcd9c2cd21255cb66d5b0e

Download Submit
memory/316-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/316-26-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/316-20-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/316-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4856-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4856-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4856-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4856-4-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download