65b974d57318431e6ddc49f3df3637127697e82ada68bcf292e265446ecf6de2

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 00:55

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General

Target

2024-05-23_d5037b5eb118299147cedc7a9b130ba9_cryptolocker.exe
Size

24KB
MD5

d5037b5eb118299147cedc7a9b130ba9
SHA1

2f67928e4fc8b99aa92a8f006b44e0a04432734c
SHA256

65b974d57318431e6ddc49f3df3637127697e82ada68bcf292e265446ecf6de2
SHA512

f3707373a7d31f5e45069c6b41ee721f61cfb4034ec56531e3551d8ca7c7af9bac9c5f98a1cd4e6e621c0a46868fba3dce43219af24c364cd349c0232383e9b6
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMmHBQ:bVCPwFRo6CpwXFXSqQXfjAsmHBQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1060-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral2/memory/1060-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2368-16-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2368-27-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1060-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	UPX
behavioral2/memory/1060-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/2368-16-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/2368-27-0x0000000008000000-0x000000000800E000-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:

2024-05-23_d5037b5eb118299147cedc7a9b130ba9_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-23_d5037b5eb118299147cedc7a9b130ba9_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

2368 hasfj.exe

pid	process
2368	hasfj.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1060-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	upx
behavioral2/memory/1060-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/2368-16-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/2368-27-0x0000000008000000-0x000000000800E000-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:

2024-05-23_d5037b5eb118299147cedc7a9b130ba9_cryptolocker.exe

description	pid	process	target process
PID 1060 wrote to memory of 2368	1060	2024-05-23_d5037b5eb118299147cedc7a9b130ba9_cryptolocker.exe	hasfj.exe
PID 1060 wrote to memory of 2368	1060	2024-05-23_d5037b5eb118299147cedc7a9b130ba9_cryptolocker.exe	hasfj.exe
PID 1060 wrote to memory of 2368	1060	2024-05-23_d5037b5eb118299147cedc7a9b130ba9_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_d5037b5eb118299147cedc7a9b130ba9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_d5037b5eb118299147cedc7a9b130ba9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1060

C:\Users\Admin\AppData\Local\Temp\hasfj.exe
"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
2⤵
- Executes dropped EXE
PID:2368

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\hasfj.exe
Filesize
24KB

MD5
e00256bea40d575937a46aface4a744a

SHA1
edc11a58fc9d279bbc2e468be678c4282a85d5f4

SHA256
09aba149ba1580cdc9ad057bc9f893139bee2f1bea2105d38306817dcb73bceb

SHA512
18c035d4bc5c6c04c2235cd77b8b0811ac1f5d7e4a4e031dc7083c925e70b56ab417cd682dc6d40732ebde5a274c7e1bde60b50f08c8ce6ab5b803115a2324c8

Download Submit
memory/1060-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1060-1-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/1060-3-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/1060-2-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/1060-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2368-16-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2368-26-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2368-20-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/2368-27-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download