81e17f7d3c6d6916e6f74968917f9c1d20128cfc5feceeb9d0ef9da4d51a68a9

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
04/02/2024, 03:48

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General

Target

2024-02-04_9a0cee245b8474795eba8c0120f90c04_cryptolocker.exe
Size

70KB
MD5

9a0cee245b8474795eba8c0120f90c04
SHA1

7c6d2a75014def416316e809283ab2b59c7d3e66
SHA256

81e17f7d3c6d6916e6f74968917f9c1d20128cfc5feceeb9d0ef9da4d51a68a9
SHA512

3b1766426a8f7aa12979bf0206656b2b5ff132d218846dc73bc74a39b704b60c3929cfbc6ef084b38559f7d9f5b0793eaacfb5b6e8c8d55ac4d6aff36161f451
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal3H:1nK6a+qdOOtEvwDpj8H

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3284-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000231f7-13.dat	CryptoLocker_rule2
behavioral2/memory/3284-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4200-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3284-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00080000000231f7-13.dat	CryptoLocker_set1
behavioral2/memory/3284-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4200-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3284-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x00080000000231f7-13.dat	UPX
behavioral2/memory/3284-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4200-26-0x0000000000500000-0x000000000050F311-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-04_9a0cee245b8474795eba8c0120f90c04_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4200	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3284-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x00080000000231f7-13.dat	upx
behavioral2/memory/3284-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4200-26-0x0000000000500000-0x000000000050F311-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 3284 wrote to memory of 4200	3284	2024-02-04_9a0cee245b8474795eba8c0120f90c04_cryptolocker.exe	85
PID 3284 wrote to memory of 4200	3284	2024-02-04_9a0cee245b8474795eba8c0120f90c04_cryptolocker.exe	85
PID 3284 wrote to memory of 4200	3284	2024-02-04_9a0cee245b8474795eba8c0120f90c04_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-04_9a0cee245b8474795eba8c0120f90c04_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_9a0cee245b8474795eba8c0120f90c04_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3284
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4200

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
70KB

MD5
6e9dde7e4c30f29927bea79745a1c369

SHA1
15ef2ad93442110d811a19cf701a8f1db39db32c

SHA256
02cc33289f45abefcf7c920826e9c5278933433fb6af2eb53f628005600fcbb3

SHA512
6c9cd3b55c42f8fa9e750b648a511b8167057c59d11b79fa1d366de92cf559ece9e8d8f028de16fedf92d23d3a5fc3efa68e45f9497b57440025749b7bdb3776

Download Submit
memory/3284-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3284-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3284-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3284-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3284-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4200-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4200-25-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/4200-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download