cf73adc3e8d2765a4303b47ff4abf000d245be8964c2d3e3e294a938b2f58390

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29/05/2024, 19:31

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General

Target

2024-05-29_b0ea1c7983779570f27a59ece46a88d6_cryptolocker.exe
Size

45KB
MD5

b0ea1c7983779570f27a59ece46a88d6
SHA1

db08264caa3777dda3ccc433066756efd22a3ebc
SHA256

cf73adc3e8d2765a4303b47ff4abf000d245be8964c2d3e3e294a938b2f58390
SHA512

3af48553ffcf284b353ff50748d94ec9467dfba02fdd03643ca5c58e557ec223432d06ad43ad06e2681645c0374d448ab03de4f0358e926762cf70be8a1632f2
SSDEEP

384:bm74uGLLQRcsdeQ72ngEr4K7YmE8jo0nrlwfjDUIDS:bm74zYcgT/Ekn0ryfjvS

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3140-0-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023402-13.dat	CryptoLocker_rule2
behavioral2/memory/1620-16-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3140-18-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1620-26-0x0000000008000000-0x000000000800D000-memory.dmp	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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-29_b0ea1c7983779570f27a59ece46a88d6_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1620	hasfj.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 3140 wrote to memory of 1620	3140	2024-05-29_b0ea1c7983779570f27a59ece46a88d6_cryptolocker.exe	85
PID 3140 wrote to memory of 1620	3140	2024-05-29_b0ea1c7983779570f27a59ece46a88d6_cryptolocker.exe	85
PID 3140 wrote to memory of 1620	3140	2024-05-29_b0ea1c7983779570f27a59ece46a88d6_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-29_b0ea1c7983779570f27a59ece46a88d6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_b0ea1c7983779570f27a59ece46a88d6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3140
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:1620

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\hasfj.exe

Filesize
45KB

MD5
18fbb35edec3ee4aac032aa9a0c254b1

SHA1
d31815267a455abf7ae078f356caa142d5466e44

SHA256
3e70edcc986170dc150a43c25f76b2641cc72ae7047bb9de716fda33012732f5

SHA512
dacf21d27cddd0793106a2c1eb4d5036d7d3ee53fbf3c609a703255160f8356f7be867510a47b991fdb0e94668c4c10ea17535ebd063e554798bec6f9655a137

Download Submit
memory/1620-16-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/1620-26-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/3140-0-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/3140-1-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/3140-2-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/3140-3-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/3140-18-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download