0846ac6e9c16a5df38c09488a82818f876f8a2d6fcbc7dce5edf5f63b30cfd5c

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
24/02/2024, 13:47

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General

Target

2024-02-24_d21dfacc316e6e3296bee128f7e5a75d_cryptolocker.exe
Size

62KB
MD5

d21dfacc316e6e3296bee128f7e5a75d
SHA1

a507bcd93cec2464dcfa9b6078bab785202cadb1
SHA256

0846ac6e9c16a5df38c09488a82818f876f8a2d6fcbc7dce5edf5f63b30cfd5c
SHA512

9f4f3231bd9fa6810eaadb53f219d601d868cee67be7a8132ee59f2d334e99ad8c175243d1098a55571839b10c17de73d387ee225306d48cb839d377f6610f35
SSDEEP

768:T6LsoEEeegiZPvEhHSG+gkum/kLyMro2GtOOtEvwDpjhXMLamkc8J5S9UEY:T6QFElP6n+gxmddpMOtEvwDpjwa38G

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4972-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000231f2-13.dat	CryptoLocker_rule2
behavioral2/memory/4972-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2988-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4972-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00080000000231f2-13.dat	CryptoLocker_set1
behavioral2/memory/4972-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2988-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4972-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00080000000231f2-13.dat	UPX
behavioral2/memory/4972-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2988-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3316742141-2240921845-2885234760-1000\Control Panel\International\Geo\Nation	2024-02-24_d21dfacc316e6e3296bee128f7e5a75d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2988	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4972-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00080000000231f2-13.dat	upx
behavioral2/memory/4972-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2988-26-0x0000000000500000-0x0000000000510000-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 4972 wrote to memory of 2988	4972	2024-02-24_d21dfacc316e6e3296bee128f7e5a75d_cryptolocker.exe	86
PID 4972 wrote to memory of 2988	4972	2024-02-24_d21dfacc316e6e3296bee128f7e5a75d_cryptolocker.exe	86
PID 4972 wrote to memory of 2988	4972	2024-02-24_d21dfacc316e6e3296bee128f7e5a75d_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-24_d21dfacc316e6e3296bee128f7e5a75d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-24_d21dfacc316e6e3296bee128f7e5a75d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4972
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2988

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
62KB

MD5
6cd57bb424de4e44cad15800a44ee02f

SHA1
161e6253238128f5b2a32b2073caac896cbcca6b

SHA256
b1d0de0b42f7f983fa07e75c87bf7cbd0c9b2f9a82ef84f2eb09d2d201390710

SHA512
c2711362abdd6e5dec85e2ceafc5822d743e3022c079a261c7abfe5a9ab2ccaa2f9f78767799cf04c75553561d2b786c7453403575edc5946bf59c64b39f6e8c

Download Submit
memory/2988-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2988-23-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2988-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4972-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4972-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4972-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4972-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4972-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download