2c329af22e81d25f97c538ccc12ba3d6f489d956d1c701c5f04bf83f7f2a015a

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
14-02-2024 09:36

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General

Target

2024-02-14_6c1516e6438b03f5f3dfe72f779030ff_cryptolocker.exe
Size

34KB
MD5

6c1516e6438b03f5f3dfe72f779030ff
SHA1

99fda9f5fcc18d71fa83773304f719882d8b6fe4
SHA256

2c329af22e81d25f97c538ccc12ba3d6f489d956d1c701c5f04bf83f7f2a015a
SHA512

c8150d8f7c92384a563bf766b853e0b42bb6c37d3d029a41c7771aedcdef5cb59bef5cfd6d095e27d0431d3904dbe30388f594c6fcaf65d3673b646fadcc7959
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5ax+/:qUmnpomddpMOtEvwDpjjaYaG

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3596-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023232-13.dat	CryptoLocker_rule2
behavioral2/memory/3596-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1012-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3596-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023232-13.dat	CryptoLocker_set1
behavioral2/memory/3596-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1012-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3596-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0007000000023232-13.dat	UPX
behavioral2/memory/3596-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1012-26-0x0000000000500000-0x000000000050F000-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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-02-14_6c1516e6438b03f5f3dfe72f779030ff_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1012	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3596-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0007000000023232-13.dat	upx
behavioral2/memory/3596-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1012-26-0x0000000000500000-0x000000000050F000-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 3596 wrote to memory of 1012	3596	2024-02-14_6c1516e6438b03f5f3dfe72f779030ff_cryptolocker.exe	84
PID 3596 wrote to memory of 1012	3596	2024-02-14_6c1516e6438b03f5f3dfe72f779030ff_cryptolocker.exe	84
PID 3596 wrote to memory of 1012	3596	2024-02-14_6c1516e6438b03f5f3dfe72f779030ff_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-14_6c1516e6438b03f5f3dfe72f779030ff_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-14_6c1516e6438b03f5f3dfe72f779030ff_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3596
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1012

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
35KB

MD5
0dadec0d890c50838b02b1144d1869f3

SHA1
77599edc86e5302d878cd574cffdf59f888316ce

SHA256
e117502dfe938d58837087ba4993e13e17cb15242a35dfaafccb2e2c9de6a923

SHA512
52b173d6c1c5075ca4e1852e87f1860abd952852b7ba20fa44facb4a958bf6a8614caf267e405d766d45f80c034780b7ca53c3d60feb06fd1ccdfee2182b4029

Download Submit
memory/1012-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1012-25-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1012-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3596-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3596-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3596-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3596-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3596-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download