21d5c7b133312b75038eabf2a30b31042703aece20901eb9982b1240448a4a4c

Analysis

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
20/02/2024, 11:23

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General

Target

2024-02-20_108178046816aec24c4a44cef51a1b59_cryptolocker.exe
Size

31KB
MD5

108178046816aec24c4a44cef51a1b59
SHA1

51687e7fb87917faad1e5491886c5aaa52c277ad
SHA256

21d5c7b133312b75038eabf2a30b31042703aece20901eb9982b1240448a4a4c
SHA512

2f80bd1acc4a9bc48d7d4408966e254529b1569a9aa52d8c5a497d97d21d75a2851fe1f2518ecdb817cbc0a47f65c05da9c640886389ba2106b1bdefbcf3a043
SSDEEP

384:bmM0V/YPvnr801TRoUGPh4TKt6ATt1DqgPa3s/zzoCt9RDE1X:b7o/2n1TCraU6GD1a4Xt9RQ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023131-12.dat	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-20_108178046816aec24c4a44cef51a1b59_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2348	rewok.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 2492 wrote to memory of 2348	2492	2024-02-20_108178046816aec24c4a44cef51a1b59_cryptolocker.exe	84
PID 2492 wrote to memory of 2348	2492	2024-02-20_108178046816aec24c4a44cef51a1b59_cryptolocker.exe	84
PID 2492 wrote to memory of 2348	2492	2024-02-20_108178046816aec24c4a44cef51a1b59_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-20_108178046816aec24c4a44cef51a1b59_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-20_108178046816aec24c4a44cef51a1b59_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2492
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:2348

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\rewok.exe

Filesize
31KB

MD5
332aa26055a2a8897699a1d0d893235b

SHA1
cfd747f3f84dcdf9d43faad7721e526b7cbe8a1b

SHA256
f8dd440c2cef6e806e83f679fb22b2301fa055dddf6c27575a586416e42135e3

SHA512
c3b8fb8d4ce910add7291e16578264dc411c4d5453e6fc5947ac86d2cc42259892fc53cbb5f6f0e4ee1579615de494be2a553f7dda85afee5f6907a59769e1f0

Download Submit
memory/2348-21-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/2492-0-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/2492-1-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/2492-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download