2c1a0ed634873a9fdb2ea7fbbfcd95c4685d8be45db711591898cd4ed23fd1fb

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
02/05/2024, 03:30

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General

Target

2024-05-02_2bac30d7058fc1d422e426d345595130_cryptolocker.exe
Size

60KB
MD5

2bac30d7058fc1d422e426d345595130
SHA1

70e3cb262678fdd0804bc64e884760d9d601fb44
SHA256

2c1a0ed634873a9fdb2ea7fbbfcd95c4685d8be45db711591898cd4ed23fd1fb
SHA512

7291f9dd5cf6bb1acf6312e7adc28263ef5e0b6e43d0b3ab54fc2b3a32c86ad45c68f24f64633baa19858867d78b54e178a7f93ca4f028df0261a5776ae0e9be
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5app1J7q:z6QFElP6n+gKmddpMOtEvwDpj9aYaz7q

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/216-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b6f-13.dat	CryptoLocker_rule2
behavioral2/memory/216-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4844-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/216-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b6f-13.dat	CryptoLocker_set1
behavioral2/memory/216-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4844-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/216-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c000000023b6f-13.dat	UPX
behavioral2/memory/216-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4844-26-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	2024-05-02_2bac30d7058fc1d422e426d345595130_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4844	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/216-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c000000023b6f-13.dat	upx
behavioral2/memory/216-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4844-26-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 216 wrote to memory of 4844	216	2024-05-02_2bac30d7058fc1d422e426d345595130_cryptolocker.exe	85
PID 216 wrote to memory of 4844	216	2024-05-02_2bac30d7058fc1d422e426d345595130_cryptolocker.exe	85
PID 216 wrote to memory of 4844	216	2024-05-02_2bac30d7058fc1d422e426d345595130_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-02_2bac30d7058fc1d422e426d345595130_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-02_2bac30d7058fc1d422e426d345595130_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:4844

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\asih.exe

Filesize
60KB

MD5
0b509fbd51c88d0781cd9eb196a2bf97

SHA1
9d51371474454588d9a10f815c4b737cb2a4d27a

SHA256
9dd10958074f56c2e08ab4c63e72ac4d62347c41f62b95d2a4571f49ff5260ff

SHA512
a013f9041fe6aa871a50a301422aa4f664b43cd06edef94917d02ec748cc223a8b665f452a0ab89d6f2530ea4238fe086b27f01090b8a38cd56788466d63ad39

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

Filesize
64KB

Download
memory/216-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/216-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/216-9-0x00007FF9ABBB0000-0x00007FF9ABDA5000-memory.dmp

Filesize
2.0MB

Download
memory/216-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4844-25-0x00007FF9ABBB0000-0x00007FF9ABDA5000-memory.dmp

Filesize
2.0MB

Download
memory/4844-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4844-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4844-27-0x00007FF9ABBB0000-0x00007FF9ABDA5000-memory.dmp

Filesize
2.0MB

Download