d71133dedad71d26d7045f62fe8abff4232e44ce557119b04c890594c83a0694

Analysis

max time kernel
0s
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
18/01/2024, 23:04

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General

Target

2024-01-18_90662dc486b473c9162f3f0ce5447de0_cryptolocker.exe
Size

73KB
MD5

90662dc486b473c9162f3f0ce5447de0
SHA1

9fbd20fd8f130529305a87ee917b3766bca76d78
SHA256

d71133dedad71d26d7045f62fe8abff4232e44ce557119b04c890594c83a0694
SHA512

8d122a6bf7eb60a98167a0fdfc1f8b4bcaf117c7d19d1492cfa251d7330156b6b1513f3764db9b8bd8b010639d3db7c47a5dba204b7b0af21f908995fda20812
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxR:T6a+rdOOtEvwDpjNtHPC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/540-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/540-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000001e5df-16.dat	CryptoLocker_rule2
behavioral2/memory/3136-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/540-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/540-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000600000001e5df-16.dat	CryptoLocker_set1
behavioral2/memory/3136-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/540-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/540-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000600000001e5df-16.dat	UPX
behavioral2/memory/3136-25-0x0000000000500000-0x0000000000510000-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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-01-18_90662dc486b473c9162f3f0ce5447de0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3136	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/540-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/540-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000600000001e5df-16.dat	upx
behavioral2/memory/3136-25-0x0000000000500000-0x0000000000510000-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 540 wrote to memory of 3136	540	2024-01-18_90662dc486b473c9162f3f0ce5447de0_cryptolocker.exe	20
PID 540 wrote to memory of 3136	540	2024-01-18_90662dc486b473c9162f3f0ce5447de0_cryptolocker.exe	20
PID 540 wrote to memory of 3136	540	2024-01-18_90662dc486b473c9162f3f0ce5447de0_cryptolocker.exe	20

C:\Users\Admin\AppData\Local\Temp\2024-01-18_90662dc486b473c9162f3f0ce5447de0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-18_90662dc486b473c9162f3f0ce5447de0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:540
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3136

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
73KB

MD5
78d49750792bb950720500f27b5c75ba

SHA1
0a35804e7e26fd3ca80622b07aa4bd7b0a5afb49

SHA256
c993a47dec147dac81afccb10dbc82ab6d13560e57b0f996e797fa8b7aa78097

SHA512
33cc2eb8d0de06883da89bfd2d7d1d71822cb52de804910959ea8aee9a3d7f3b14f0a48fa5fecc661fd37843ea6eb245d7f284ef7ac0ee583cb84eb5c26a7ed6

Download Submit
memory/540-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/540-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/540-3-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/540-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/540-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3136-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download