a03fa6779d1935190b3b776a77b3703d992ce9157b4147ab069fe2ac5b640a05

Analysis

max time kernel
148s
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
23-02-2024 06:41

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General

Target

2024-02-23_598cacb3090daf197ada69c813960268_cryptolocker.exe
Size

69KB
MD5

598cacb3090daf197ada69c813960268
SHA1

b821183ff5cd80707cfa57debc5185739561e2f8
SHA256

a03fa6779d1935190b3b776a77b3703d992ce9157b4147ab069fe2ac5b640a05
SHA512

61fb1eea8e45e656783a05e88bde9c6c2f211e2032a5e8d74ccb8854c040921c06428de41a79e8aaa75fda67aa269dea0409a1ff97c991538394c5add3b77f48
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUHc:DW60sllyWOtEvwDpjwF85e

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/736-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00c300000001e848-13.dat	CryptoLocker_rule2
behavioral2/memory/2652-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/736-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/736-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00c300000001e848-13.dat	CryptoLocker_set1
behavioral2/memory/2652-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/736-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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-1-5-21-2132103209-3755304320-2959162027-1000\Control Panel\International\Geo\Nation	2024-02-23_598cacb3090daf197ada69c813960268_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2652	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 736 wrote to memory of 2652	736	2024-02-23_598cacb3090daf197ada69c813960268_cryptolocker.exe	89
PID 736 wrote to memory of 2652	736	2024-02-23_598cacb3090daf197ada69c813960268_cryptolocker.exe	89
PID 736 wrote to memory of 2652	736	2024-02-23_598cacb3090daf197ada69c813960268_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-23_598cacb3090daf197ada69c813960268_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_598cacb3090daf197ada69c813960268_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:736
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2652

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
69KB

MD5
f7f8b2b7e2dde201a68e692bd7f90980

SHA1
91aa85a826c5d15ba050fd98e99f7cfcb673e3bb

SHA256
9374e49006c034511eee4f85a1c81572270cb75eab01138ca8b0b1b1340c020e

SHA512
7b24b0fedd727454f1185b1fa7f5f589a6241fa8476ea6ffcab55c2ecad68a1b658318d7188c3cca7ad6370a18e375edac1f3b1e264c6d17775f275e930c62f8

Download Submit
memory/736-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/736-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/736-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/736-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/736-18-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/2652-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/2652-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2652-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download