77988079586e63d0c0a46d254edc8df0ecc5151c03e4968f2fa54aeec53667d9

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
27-04-2024 07:51

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General

Target

2024-04-27_fe534e0a6954830d60b9a7924620514f_cryptolocker.exe
Size

39KB
MD5

fe534e0a6954830d60b9a7924620514f
SHA1

b839dd0d6e1ead6fc809d6df1a857b34d9699786
SHA256

77988079586e63d0c0a46d254edc8df0ecc5151c03e4968f2fa54aeec53667d9
SHA512

3941b1643500c6fb27093708840f33c731bfc28c88e905b0abd9846dec639d10f943358d0990a22f72a04219966a0b326b1392bedb37745f1feaf92dc2c9f277
SSDEEP

768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6WaJIOc+UPPEkLp64:YGzl5wjRQBBOsP1QMOtEvwDpjgarrkLJ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/5000-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b4c-13.dat	CryptoLocker_rule2
behavioral2/memory/884-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5000-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/5000-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b4c-13.dat	CryptoLocker_set1
behavioral2/memory/884-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5000-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	2024-04-27_fe534e0a6954830d60b9a7924620514f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
884	asih.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 5000 wrote to memory of 884	5000	2024-04-27_fe534e0a6954830d60b9a7924620514f_cryptolocker.exe	85
PID 5000 wrote to memory of 884	5000	2024-04-27_fe534e0a6954830d60b9a7924620514f_cryptolocker.exe	85
PID 5000 wrote to memory of 884	5000	2024-04-27_fe534e0a6954830d60b9a7924620514f_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-27_fe534e0a6954830d60b9a7924620514f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_fe534e0a6954830d60b9a7924620514f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5000
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:884

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\asih.exe

Filesize
39KB

MD5
dc25b0cfa9a22fb148e1e342e0752948

SHA1
c09995a7a034a57b3c64ba4bb360ab683be563d9

SHA256
80139b9a11f75912f4574845c147f7045628df6ce8472209ae3206dbaaf013d9

SHA512
f7e42e19bc8b340c5169f4f24cd2a7644c745bcf5dc4d8d079f56dbb0a8a00ffcdf9a34296cb0a54cadc26c0a3ec738b65fb0dd2ca100c2a27389c5a0716e8a7

Download Submit
memory/884-18-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/884-20-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/884-26-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/5000-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/5000-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/5000-2-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/5000-9-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/5000-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download