fafec74892b8cebd7b888b99209e7311b5fba11e2d8440907d5c64c21ef0218d

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
12/06/2024, 16:53

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General

Target

2024-06-12_3399ab5380298dfe4fe189005e06e02f_cryptolocker.exe
Size

35KB
MD5

3399ab5380298dfe4fe189005e06e02f
SHA1

5800a6f8387747e90ca57ac89e239de0aa67e1dc
SHA256

fafec74892b8cebd7b888b99209e7311b5fba11e2d8440907d5c64c21ef0218d
SHA512

49206b18823e79872747cac2766118897fb6a561722cd283b30b130f87098aa695a0657f144167d1b313a143759c663e8c40a4a830ab33835fe620df82babeb3
SSDEEP

768:bFPm5zusFUB2preAr+Ofjg0S16avdrQFiLjJvtXT:bFPmpiif/oc+vXT

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/220-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002328e-13.dat	CryptoLocker_rule2
behavioral2/memory/1636-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/220-19-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1636-28-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/220-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x000900000002328e-13.dat	UPX
behavioral2/memory/1636-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/220-19-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/1636-28-0x0000000008000000-0x000000000800E000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-06-12_3399ab5380298dfe4fe189005e06e02f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1636	lossy.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/220-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x000900000002328e-13.dat	upx
behavioral2/memory/1636-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/220-19-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/1636-28-0x0000000008000000-0x000000000800E000-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 220 wrote to memory of 1636	220	2024-06-12_3399ab5380298dfe4fe189005e06e02f_cryptolocker.exe	82
PID 220 wrote to memory of 1636	220	2024-06-12_3399ab5380298dfe4fe189005e06e02f_cryptolocker.exe	82
PID 220 wrote to memory of 1636	220	2024-06-12_3399ab5380298dfe4fe189005e06e02f_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-12_3399ab5380298dfe4fe189005e06e02f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-12_3399ab5380298dfe4fe189005e06e02f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:220
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:1636

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
35KB

MD5
752ec77da9375a6051cfbbca16e6cad5

SHA1
82e5b43f8fa454fc6521572452736c8142825929

SHA256
97310f292ae49c7f6955ee3bf236b248c9ac3bd57b6aa8d161cb0f5304a0cf4d

SHA512
7ea860c46b4f2e1924989fa525cf0c06872ec3f7e3c402acd5b7e9ae828f729e689e6e62a04ac1f8936b0b3b97ded3e02a943f730b9f778b98315e75d37e85f2

Download Submit
memory/220-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/220-1-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/220-2-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/220-9-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/220-19-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1636-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1636-21-0x0000000002030000-0x0000000002036000-memory.dmp

Filesize
24KB

Download
memory/1636-27-0x0000000002130000-0x0000000002136000-memory.dmp

Filesize
24KB

Download
memory/1636-28-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download