31f8ba781058ab88327d2cca7f16106ac9d80b4c258a0da890de804a827dbc58

Analysis

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

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
26/05/2024, 20:31

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General

Target

2024-05-26_cbf11aa47b412cfe304953267b562a26_cryptolocker.exe
Size

42KB
MD5

cbf11aa47b412cfe304953267b562a26
SHA1

a09e85ea9947996de8c826c8c9022826a64599fa
SHA256

31f8ba781058ab88327d2cca7f16106ac9d80b4c258a0da890de804a827dbc58
SHA512

4f81b3cb0b18d531fff9068cacc866c5d5c8ce5292e4a4c8bdb34aa1df098cfd61b4094d239f7be72763ba303902445ac846851cf76e44f32241db6d7d20b671
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAr:bCDOw9aMDooc+vAr

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4672-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023305-13.dat	CryptoLocker_rule2
behavioral2/memory/4672-16-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1744-26-0x0000000008000000-0x000000000800A000-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	2024-05-26_cbf11aa47b412cfe304953267b562a26_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1744	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 4672 wrote to memory of 1744	4672	2024-05-26_cbf11aa47b412cfe304953267b562a26_cryptolocker.exe	82
PID 4672 wrote to memory of 1744	4672	2024-05-26_cbf11aa47b412cfe304953267b562a26_cryptolocker.exe	82
PID 4672 wrote to memory of 1744	4672	2024-05-26_cbf11aa47b412cfe304953267b562a26_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-26_cbf11aa47b412cfe304953267b562a26_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-26_cbf11aa47b412cfe304953267b562a26_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4672
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:1744

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
997f204a6deb660bc68c7585ded77569

SHA1
7368d1b93fb64c4d4dea75f5aa4d447a485a80d9

SHA256
c9a01ba59d84b22d68ef8c8cbaa2ef3f387bef071ee8ec34b57ce40d3a12d859

SHA512
ae0cf4644a5bf68cbdc7a68200700a0d0e6074b8c2df1acd0463137f9b16d0c1c04c7fca96de81ff93cf5b3cec9704d6a348075e2c030523c1d3eabb47dc8589

Download Submit
memory/1744-19-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/1744-25-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/1744-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4672-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4672-1-0x0000000001F40000-0x0000000001F46000-memory.dmp

Filesize
24KB

Download
memory/4672-2-0x0000000001F60000-0x0000000001F66000-memory.dmp

Filesize
24KB

Download
memory/4672-9-0x0000000001F40000-0x0000000001F46000-memory.dmp

Filesize
24KB

Download
memory/4672-16-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download