674697e9ac25fdc92945598f6069806bc2938d4d0efe3aec8de13b7d705ffacf

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 02:31

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General

Target

2024-05-22_4767d148c50ce5dc2128de58be472216_cryptolocker.exe
Size

38KB
MD5

4767d148c50ce5dc2128de58be472216
SHA1

2bb37a5900ac12b90d8575b327a9453e3ace25e7
SHA256

674697e9ac25fdc92945598f6069806bc2938d4d0efe3aec8de13b7d705ffacf
SHA512

d483b832094a500a53a9b68556eb7c832661fdbc6531ddcac8a148845bf22f3b8daf1e61f019a44471870e16832aea22b67b6ce2f09aafb69cbd3f4dbfc96570
SSDEEP

768:b7o/2n1TCraU6GD1a4Xt9bRU6zA6o36mG:bc/y2lLRU6zA6qG

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\rewok.exe	CryptoLocker_rule2

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

Processes:

2024-05-22_4767d148c50ce5dc2128de58be472216_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-22_4767d148c50ce5dc2128de58be472216_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

rewok.exe

pid process

2084 rewok.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2084	rewok.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_4767d148c50ce5dc2128de58be472216_cryptolocker.exe

description	pid	process	target process
PID 1376 wrote to memory of 2084	1376	2024-05-22_4767d148c50ce5dc2128de58be472216_cryptolocker.exe	rewok.exe
PID 1376 wrote to memory of 2084	1376	2024-05-22_4767d148c50ce5dc2128de58be472216_cryptolocker.exe	rewok.exe
PID 1376 wrote to memory of 2084	1376	2024-05-22_4767d148c50ce5dc2128de58be472216_cryptolocker.exe	rewok.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_4767d148c50ce5dc2128de58be472216_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_4767d148c50ce5dc2128de58be472216_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1376

C:\Users\Admin\AppData\Local\Temp\rewok.exe
"C:\Users\Admin\AppData\Local\Temp\rewok.exe"
2⤵
- Executes dropped EXE
PID:2084

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\rewok.exe
Filesize
38KB

MD5
8bed352750917bcdb65911302fa2184e

SHA1
200407e39646ca362a9b906b7667fadd860df783

SHA256
fba665ab8d305a06716e1f85441e5ed9ebc6d2b97ccbb3d2fddb1ced9a61c518

SHA512
bfa669397d33b9f1dbb81bf54469b5fa614a4d17b9cb61fa9e131b0c2d6b5b4cf7377f88f592edc748d2f82db56af45e95fde8b61e82deade15281679aec5810

Download Submit
memory/1376-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/1376-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1376-8-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2084-25-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download