0276f85806f2e9dc7e5560f46450b51d6c0f08a217a28272e94814b465f24b31

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
01/02/2024, 15:32

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General

Target

2024-02-01_aef2724d8f52bc3d3655730e775c982d_cryptolocker.exe
Size

28KB
MD5

aef2724d8f52bc3d3655730e775c982d
SHA1

a39706570d07cdaae7cf8aa7c2679dd811c2b9be
SHA256

0276f85806f2e9dc7e5560f46450b51d6c0f08a217a28272e94814b465f24b31
SHA512

a1412bbcb52caae0a05ba43cd61630f2b808bb22eef6fdfbdb7211d02daaf6de6d081dce61049ffad2b2037516efeba8f84b0aec8cfab2ab1b3b9d1d768eb4b0
SSDEEP

768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIOc+/:q0zizzOSxMOtEvwDpj/arZ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/932-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023222-13.dat	CryptoLocker_rule2
behavioral2/memory/932-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/812-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/812-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/932-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/812-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/812-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/932-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023222-13.dat	UPX
behavioral2/memory/932-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/812-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/812-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-01_aef2724d8f52bc3d3655730e775c982d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
812	asih.exe

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 932 wrote to memory of 812	932	2024-02-01_aef2724d8f52bc3d3655730e775c982d_cryptolocker.exe	86
PID 932 wrote to memory of 812	932	2024-02-01_aef2724d8f52bc3d3655730e775c982d_cryptolocker.exe	86
PID 932 wrote to memory of 812	932	2024-02-01_aef2724d8f52bc3d3655730e775c982d_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-01_aef2724d8f52bc3d3655730e775c982d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-01_aef2724d8f52bc3d3655730e775c982d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:932
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:812

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
28KB

MD5
914d1f5ab49682499872be5f0e1c3833

SHA1
0a43448aa7a40ebf05eb8dc2d5d9064b416c35f9

SHA256
db38c95885cccfae6075cf051fa85669994d5d458176655784e539007e77dad4

SHA512
57bf819f67866d2d864564e90e0c32098ebd50b3efd908a1851b4d9d54e647ec82e0b651324bf957440946a26a51fc5a14a63ce545a2d88b1eb096e43f6df913

Download Submit
memory/812-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/812-22-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/812-20-0x0000000000680000-0x0000000000686000-memory.dmp

Filesize
24KB

Download
memory/812-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/932-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/932-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/932-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/932-3-0x0000000000860000-0x0000000000866000-memory.dmp

Filesize
24KB

Download
memory/932-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download