7585e380b65465dcf264eae85c8ce6e2aa2d107256fc2ddf2a3cb3d4d962289e

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/02/2024, 23:42

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-02-18_d1ee6b9c858eab3809fc1d903346fefd_cryptolocker.exe
Size

97KB
MD5

d1ee6b9c858eab3809fc1d903346fefd
SHA1

76f77dcc5720a3bdccd0ae434de6698dbb390389
SHA256

7585e380b65465dcf264eae85c8ce6e2aa2d107256fc2ddf2a3cb3d4d962289e
SHA512

849ab038e9bc9ea6f1594df9f34cd2eeeeaf9047ab9dd5f5341e85a306041d236f8f5b23adc235051e850526c622ec0a72b2ac28ed7011e23ca989855f2b14d0
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbbr/Bc:z6a+CdOOtEvwDpjcq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4160-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000f000000023163-13.dat	CryptoLocker_rule2
behavioral2/memory/4160-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2820-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4160-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000f000000023163-13.dat	CryptoLocker_set1
behavioral2/memory/4160-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2820-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4160-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000f000000023163-13.dat	UPX
behavioral2/memory/4160-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2820-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-02-18_d1ee6b9c858eab3809fc1d903346fefd_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2820	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4160-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000f000000023163-13.dat	upx
behavioral2/memory/4160-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2820-26-0x0000000000500000-0x0000000000510000-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 4160 wrote to memory of 2820	4160	2024-02-18_d1ee6b9c858eab3809fc1d903346fefd_cryptolocker.exe	85
PID 4160 wrote to memory of 2820	4160	2024-02-18_d1ee6b9c858eab3809fc1d903346fefd_cryptolocker.exe	85
PID 4160 wrote to memory of 2820	4160	2024-02-18_d1ee6b9c858eab3809fc1d903346fefd_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-18_d1ee6b9c858eab3809fc1d903346fefd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_d1ee6b9c858eab3809fc1d903346fefd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4160
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2820

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
97KB

MD5
1a8f86e3dcf25fec77d7b19b893ddf1a

SHA1
7acbf86f54ec1201782225185832760f9cad6393

SHA256
9b6d2414508381891c3a363f4ba45044193cced44c258456d0097ac62de7326e

SHA512
5ee63c7ca390ed0e2354b6f8fcfa3b39666f071ac76cbfb953aed1d6393831ef0a7a959186c30d333fea088e27056296380ebf7f2adda4d093deaf22092009aa

Download Submit
memory/2820-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/2820-19-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/2820-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4160-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4160-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4160-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4160-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4160-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download