c62a44b8b69687a69da464a1d7c955a1c29cde9443ecc04029b9ac9aaa177324

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
12-05-2024 06:42

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General

Target

2024-05-12_eda0f69644f0cc5b82a92d0f86648f9c_cryptolocker.exe
Size

39KB
MD5

eda0f69644f0cc5b82a92d0f86648f9c
SHA1

170cc74b2099da87a1096b171e3197e1bd214a1d
SHA256

c62a44b8b69687a69da464a1d7c955a1c29cde9443ecc04029b9ac9aaa177324
SHA512

5528b00cacae7cb8848b604652da703ece3779a226ce8d97a22085d3af208ff5215833e775208bc142546612326ad462fcd195520cad575b9a087dfea1a02b94
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBx:qDdFJy3QMOtEvwDpjjWMl7TdX

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1988-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/756-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1988-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/756-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1988-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_set1
behavioral2/memory/756-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1988-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/756-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1988-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-13.dat	UPX
behavioral2/memory/756-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1988-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/756-28-0x0000000000500000-0x0000000000510000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-12_eda0f69644f0cc5b82a92d0f86648f9c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
756	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1988-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000022f51-13.dat	upx
behavioral2/memory/756-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1988-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/756-28-0x0000000000500000-0x0000000000510000-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 1988 wrote to memory of 756	1988	2024-05-12_eda0f69644f0cc5b82a92d0f86648f9c_cryptolocker.exe	82
PID 1988 wrote to memory of 756	1988	2024-05-12_eda0f69644f0cc5b82a92d0f86648f9c_cryptolocker.exe	82
PID 1988 wrote to memory of 756	1988	2024-05-12_eda0f69644f0cc5b82a92d0f86648f9c_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-12_eda0f69644f0cc5b82a92d0f86648f9c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-12_eda0f69644f0cc5b82a92d0f86648f9c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1988
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:756

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
39KB

MD5
7fd8392aae7e70145f96763aa7b6a89a

SHA1
3791374540b37c6a59b37b7b4c96aecd62e650fb

SHA256
dfaf9ff2102744bd71c1c2215d74333c8f38a94799de6b153849218a9d7621f2

SHA512
425f79e338d30884962d44ac67f3c960d95ed1c395ef2b76600b4da8665ba695d5771f796720233a18dc2adfed5cdda48f8cbeb95e860413cc37eacbce7ebd2f

Download Submit
memory/756-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/756-21-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/756-27-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/756-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1988-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1988-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1988-2-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/1988-9-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1988-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download