2853bc3ac79c3bb81d7ed5d2e368420a095c03718ae7f0d1a64a90b1692d8e35

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
20-04-2024 10:49

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General

Target

2024-04-20_4cf58301660b05dc5b1863ad649215c8_cryptolocker.exe
Size

38KB
MD5

4cf58301660b05dc5b1863ad649215c8
SHA1

a82c00f3792bb08be352162b0497fcf840b51035
SHA256

2853bc3ac79c3bb81d7ed5d2e368420a095c03718ae7f0d1a64a90b1692d8e35
SHA512

02efd808911b0ec1a7921725633f72178fd036a28b1acd72f9a22e1d492d8edb5956b732d0a678af51522d01176e8f08676dd827c694bd38cae0b599bb4df8c9
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY9r:qDdFJy3QMOtEvwDpjjWMl7Tc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/5008-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_rule2
behavioral2/memory/5008-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4792-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/5008-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_set1
behavioral2/memory/5008-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4792-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5008-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x001c00000001e97e-13.dat	UPX
behavioral2/memory/5008-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4792-26-0x0000000000500000-0x0000000000510000-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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	2024-04-20_4cf58301660b05dc5b1863ad649215c8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4792	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5008-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x001c00000001e97e-13.dat	upx
behavioral2/memory/5008-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4792-26-0x0000000000500000-0x0000000000510000-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 5008 wrote to memory of 4792	5008	2024-04-20_4cf58301660b05dc5b1863ad649215c8_cryptolocker.exe	85
PID 5008 wrote to memory of 4792	5008	2024-04-20_4cf58301660b05dc5b1863ad649215c8_cryptolocker.exe	85
PID 5008 wrote to memory of 4792	5008	2024-04-20_4cf58301660b05dc5b1863ad649215c8_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-20_4cf58301660b05dc5b1863ad649215c8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_4cf58301660b05dc5b1863ad649215c8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5008
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4792

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
79d9754291c79fe55153eb6742df89fe

SHA1
356c1fcd1efb991483402bb72faef9ce94275683

SHA256
79be1f55a4f8cfdae35cfa3beab0fd5ad207f5ed7a5e6c42f02278df4c96b420

SHA512
e10eb9123d7b6f4c194885058c349879f6d6c468d57fb5653f73f743b2c2b6eec985042bb1e1576e9a0baa8cbca13baa1a9ac70bad80c369aeab795355d2a7d2

Download Submit
memory/4792-19-0x00000000007E0000-0x00000000007E6000-memory.dmp

Filesize
24KB

Download
memory/4792-20-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4792-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5008-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5008-1-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/5008-2-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/5008-3-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/5008-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download