bcbd9be946286d03ae2ef96d93d58a1c87d3bab3170e273c959a375491718459

Analysis

max time kernel
150s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
15-05-2024 18:27

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General

Target

2024-05-15_1a4575d7756ef7efbcadc7e5bb6088c2_cryptolocker.exe
Size

41KB
MD5

1a4575d7756ef7efbcadc7e5bb6088c2
SHA1

7b696471223ff75972fa48232b7737592d697f3e
SHA256

bcbd9be946286d03ae2ef96d93d58a1c87d3bab3170e273c959a375491718459
SHA512

a91d0c1e126c6a7edc3fd29138188cd5fafcd35f51685022256cee4b825758289e8aa4c0b548001d5072c725427bde5027efa3d1cc62ba4874c4b7fec123154a
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAqtA:bCDOw9aMDooc+vAqtA

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1152-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023305-13.dat	CryptoLocker_rule2
behavioral2/memory/1152-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/440-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/440-27-0x0000000008000000-0x000000000800A000-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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-15_1a4575d7756ef7efbcadc7e5bb6088c2_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
440	lossy.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 1152 wrote to memory of 440	1152	2024-05-15_1a4575d7756ef7efbcadc7e5bb6088c2_cryptolocker.exe	83
PID 1152 wrote to memory of 440	1152	2024-05-15_1a4575d7756ef7efbcadc7e5bb6088c2_cryptolocker.exe	83
PID 1152 wrote to memory of 440	1152	2024-05-15_1a4575d7756ef7efbcadc7e5bb6088c2_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-15_1a4575d7756ef7efbcadc7e5bb6088c2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-15_1a4575d7756ef7efbcadc7e5bb6088c2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1152
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:440

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\lossy.exe

Filesize
42KB

MD5
e329dacb7c9adc4841649a5050395a2f

SHA1
22871d12467bd00713314db58b9d23e422d3bb93

SHA256
6b4cd8965344937ed35e50f858db2a64f29551c06801aa14365750ac02a40c9f

SHA512
30954c586daa7390e7eca522bdc72287a4232051869985ee019b465cbc060544367b8aeb1e4d726fa9e83de6b7cc79975dbc56efa4fb6141547dd126c1f62021

Download Submit
memory/440-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/440-21-0x0000000001FC0000-0x0000000001FC6000-memory.dmp

Filesize
24KB

Download
memory/440-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/440-27-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1152-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1152-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1152-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1152-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1152-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download