2d81986a2b5de3199b645122859a914885d46a329080eca1b82ed4c800d6e323

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
30-04-2024 21:43

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General

Target

2024-04-30_0d1402d2ee4ba3b7c9a8379ceef1a870_cryptolocker.exe
Size

38KB
MD5

0d1402d2ee4ba3b7c9a8379ceef1a870
SHA1

1e6842510ac74e87e188f8ada172a6a21261ad71
SHA256

2d81986a2b5de3199b645122859a914885d46a329080eca1b82ed4c800d6e323
SHA512

c45ac23c7734a4ade288de475b9ad5860d69615d181a5ca66e8b76ee5da5ecdafb34aeb93f8c668bc379c0b84391c9a503cc4e9c8f7385b309d24840670f7fa1
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYanTF:qDdFJy3QMOtEvwDpjjWMl7Tdnx

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1888-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023b1e-13.dat	CryptoLocker_rule2
behavioral2/memory/1888-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3260-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1888-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d000000023b1e-13.dat	CryptoLocker_set1
behavioral2/memory/1888-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3260-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1888-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000d000000023b1e-13.dat	UPX
behavioral2/memory/1888-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3260-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-04-30_0d1402d2ee4ba3b7c9a8379ceef1a870_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3260	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1888-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000d000000023b1e-13.dat	upx
behavioral2/memory/1888-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3260-26-0x0000000000500000-0x0000000000510000-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 1888 wrote to memory of 3260	1888	2024-04-30_0d1402d2ee4ba3b7c9a8379ceef1a870_cryptolocker.exe	84
PID 1888 wrote to memory of 3260	1888	2024-04-30_0d1402d2ee4ba3b7c9a8379ceef1a870_cryptolocker.exe	84
PID 1888 wrote to memory of 3260	1888	2024-04-30_0d1402d2ee4ba3b7c9a8379ceef1a870_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-30_0d1402d2ee4ba3b7c9a8379ceef1a870_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_0d1402d2ee4ba3b7c9a8379ceef1a870_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1888
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3260

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
38KB

MD5
3f5273440700db213d9b674b62295eed

SHA1
b4e89c5580723f2a1bb3917532680a274aa9919c

SHA256
203a5913ddd1fd242713bc8dc3e3bb2f462c39fb02193be8a1cc4cc1ddf64781

SHA512
c3afe9da957c4bea175884b5bf13094e9f0845f94ee280309ce06df5056eafff9270309396e663c6e271b8b808a7e81ab7c78f321ef2558bd094646c3c1b9764

Download Submit
memory/1888-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1888-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1888-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1888-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1888-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3260-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3260-25-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3260-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download