f255481163ab8077a97f60d879b64227fb2060397aa5304a6098dd7cd1b7a930

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
20/04/2024, 00:51

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General

Target

2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe
Size

69KB
MD5

cef42451928080211c4447b4d253025a
SHA1

0b995833d6352493a821fe33a649988f3856d4b2
SHA256

f255481163ab8077a97f60d879b64227fb2060397aa5304a6098dd7cd1b7a930
SHA512

57e0779f6bf430e15e65d609b27ed4227e3ed4aa4b9a6e64e1062c46e002017601dfb3df57a436ee4bda6b2db8b170ec9c70bca245991b22d89ed46d7d9273f3
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKU50i:DW60sllyWOtEvwDpjwF85t

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1976-1-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c0000000133b0-11.dat	CryptoLocker_rule2
behavioral1/memory/1976-15-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2876-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1976-13-0x00000000022B0000-0x00000000022BB000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1976-1-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c0000000133b0-11.dat	CryptoLocker_set1
behavioral1/memory/1976-15-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2876-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1976-13-0x00000000022B0000-0x00000000022BB000-memory.dmp	CryptoLocker_set1

Executes dropped EXE 1 IoCs

pid	Process
2876	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1976	2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1976 wrote to memory of 2876	1976	2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe	28
PID 1976 wrote to memory of 2876	1976	2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe	28
PID 1976 wrote to memory of 2876	1976	2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe	28
PID 1976 wrote to memory of 2876	1976	2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2876

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
70KB

MD5
dc53bd2ac6037be845c1e4ec4fe15968

SHA1
225d64e7e4319e92292e34d701ac8a0789030d94

SHA256
0bfa7227e7a800caa084bb5e97c9bc06dd71ba6922951ddb611fee15289df5b1

SHA512
053600368596a04d81dad2b13948d4654fa95dfe0ff35f797c8fdaafe2a9b98e2887f0377104fe221310b3a2d74c7bfbe034caf10e70e5119c73b0ed528962fb

Download Submit
memory/1976-1-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/1976-0-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1976-2-0x0000000000210000-0x0000000000216000-memory.dmp

Filesize
24KB

Download
memory/1976-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1976-15-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/1976-13-0x00000000022B0000-0x00000000022BB000-memory.dmp

Filesize
44KB

Download
memory/2876-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/2876-19-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2876-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download