ad4de6c98b3f7a8071af3687c3238ce6b3ee6d885de911b41d8b417450985c98

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
15/06/2024, 07:37

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General

Target

2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe
Size

33KB
MD5

72eff5ee9b92c90f650764c0cbd7cbb3
SHA1

623ae89cc0d0bc5918907cb2954332998d3e55b1
SHA256

ad4de6c98b3f7a8071af3687c3238ce6b3ee6d885de911b41d8b417450985c98
SHA512

a5e7c1b9cafb6c92e73062682462fea15799932d0a1aad35b5962a10e574ac2cafd14b9890e1ac84b67ac5c8fc11559879c1f1fec6aaab6fc14cd18d6fc4affe
SSDEEP

768:bROjawZEjbhxnbcuyD7U9kXfn62tH/1/LpP+w:bRO2wZEjbnouy8Gv6iH/NLpN

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/2356-0-0x0000000000400000-0x000000000040D000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00060000000232b0-13.dat	CryptoLocker_rule2
behavioral2/memory/4580-18-0x0000000000400000-0x000000000040D000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/2356-0-0x0000000000400000-0x000000000040D000-memory.dmp	UPX
behavioral2/files/0x00060000000232b0-13.dat	UPX
behavioral2/memory/4580-18-0x0000000000400000-0x000000000040D000-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-1-5-21-3169499791-3545231813-3156325206-1000\Control Panel\International\Geo\Nation	2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4580	rewok.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2356-0-0x0000000000400000-0x000000000040D000-memory.dmp	upx
behavioral2/files/0x00060000000232b0-13.dat	upx
behavioral2/memory/4580-18-0x0000000000400000-0x000000000040D000-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 2356 wrote to memory of 4580	2356	2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe	82
PID 2356 wrote to memory of 4580	2356	2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe	82
PID 2356 wrote to memory of 4580	2356	2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2356
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:4580

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
33KB

MD5
cc1f1b45ac56b31982c3cb8357e3be2c

SHA1
61f1e69ec1d63b348568c562e0aeee67aee6d5a9

SHA256
d2883988366d112a21b2ce15499c5f30a60e24f8082897a4312824ef83c5990a

SHA512
7e04318764ece5aa546db83aaaf40f4493bed2d944595ebe5c2c2b8380632fbabc353879d212758b32685ddbcd1ff825189bfd73210f099c80a07e985eef8a32

Download Submit
memory/2356-0-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/2356-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2356-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2356-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4580-18-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/4580-26-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download