4f1531a801c28cd32563c52ece08aa900f774bfe9e8f831a272e203343b71312

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
23/04/2024, 03:59

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General

Target

2024-04-23_e58d32d7e44c73debba1ae10791474f4_cryptolocker.exe
Size

42KB
MD5

e58d32d7e44c73debba1ae10791474f4
SHA1

ddb9c924d5dae6187933d7500299d1bd10583cf2
SHA256

4f1531a801c28cd32563c52ece08aa900f774bfe9e8f831a272e203343b71312
SHA512

94e473035a9dc822a98208f2bed6f6e9c424830a1e25c44d0f6df580b908be3d992d0b42304dbe8559640d7f2a3c6069fdcdd24fc7e54724b816a731a7c94bfc
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAIR:bCDOw9aMDooc+vAs

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3996-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023264-13.dat	CryptoLocker_rule2
behavioral2/memory/3996-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/448-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/448-27-0x0000000008000000-0x000000000800A000-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-1-5-21-1132431369-515282257-1998160155-1000\Control Panel\International\Geo\Nation	2024-04-23_e58d32d7e44c73debba1ae10791474f4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
448	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 3996 wrote to memory of 448	3996	2024-04-23_e58d32d7e44c73debba1ae10791474f4_cryptolocker.exe	83
PID 3996 wrote to memory of 448	3996	2024-04-23_e58d32d7e44c73debba1ae10791474f4_cryptolocker.exe	83
PID 3996 wrote to memory of 448	3996	2024-04-23_e58d32d7e44c73debba1ae10791474f4_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-23_e58d32d7e44c73debba1ae10791474f4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-23_e58d32d7e44c73debba1ae10791474f4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3996
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:448

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
5d8d008abf87217970c3fada6f05faa6

SHA1
21a443efa9653c9574d8b507e1c65f996097c055

SHA256
7689160a39604d7d6e8086eb9caf2f8706d0ea75cfd8622d1bed9d123a76314b

SHA512
176187a5781fe3a33c9cef89d9eeae0a2f24a9107b5b440f915311c982a731e689fde3cfa47b91231e195d757e6baa3884c78c25cbca0e2ff43ee3273bf9bede

Download Submit
memory/448-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/448-20-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/448-22-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/448-27-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3996-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3996-1-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3996-2-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3996-3-0x0000000000780000-0x0000000000786000-memory.dmp

Filesize
24KB

Download
memory/3996-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download