7c177f41ac485f63c982118299962368035bcea0039857dac90e01981dcd571e

Analysis

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

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
25/05/2024, 04:39

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General

Target

2024-05-25_c4ac25331334dc8a25ec6c41e71d81ab_cryptolocker.exe
Size

53KB
MD5

c4ac25331334dc8a25ec6c41e71d81ab
SHA1

dbfcb01ff5bb212d5533443494d3c1188c231c1a
SHA256

7c177f41ac485f63c982118299962368035bcea0039857dac90e01981dcd571e
SHA512

c063a9162f0e19e88fe0e7a1e49db554247dab5c3443bca20d2516bbff796e245dbf588e350a2b1514a494f9c65f531002cf3b595d52656bae8fd0938e63d1cd
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOX6:bODOw9acifAoc+vt

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2672-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000002326f-13.dat	CryptoLocker_rule2
behavioral2/memory/944-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2672-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/944-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2672-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x000600000002326f-13.dat	UPX
behavioral2/memory/944-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/2672-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/944-27-0x0000000008000000-0x000000000800F000-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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-25_c4ac25331334dc8a25ec6c41e71d81ab_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
944	lossy.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2672-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x000600000002326f-13.dat	upx
behavioral2/memory/944-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/2672-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/944-27-0x0000000008000000-0x000000000800F000-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 2672 wrote to memory of 944	2672	2024-05-25_c4ac25331334dc8a25ec6c41e71d81ab_cryptolocker.exe	81
PID 2672 wrote to memory of 944	2672	2024-05-25_c4ac25331334dc8a25ec6c41e71d81ab_cryptolocker.exe	81
PID 2672 wrote to memory of 944	2672	2024-05-25_c4ac25331334dc8a25ec6c41e71d81ab_cryptolocker.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-05-25_c4ac25331334dc8a25ec6c41e71d81ab_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_c4ac25331334dc8a25ec6c41e71d81ab_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2672
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:944

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
53KB

MD5
637651abc2926a6498e7a0ca07283c11

SHA1
75d625bc95c9e0aab84e45814c219c3cfddf93aa

SHA256
187f81c878d06be38ed0416499dbeb0da7191dacde63191e07fb84f04df1402f

SHA512
bc5bc89c36820b705fe4ea5e38941b85a4eb57840e3c87ec49107f1a344be36a6bc1dc2c6ed1fc5120cc8602688c5f7285fc83ed42ac605cd3086031f6ae28fa

Download Submit
memory/944-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/944-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/944-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/944-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2672-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2672-1-0x0000000000720000-0x0000000000726000-memory.dmp

Filesize
24KB

Download
memory/2672-2-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/2672-9-0x0000000000720000-0x0000000000726000-memory.dmp

Filesize
24KB

Download
memory/2672-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download