7c0c1711fb72096ea5bf2bf4e1ba7cf406149fba5a011d5f4ab6573b7cf5d60c

Analysis

max time kernel
134s
max time network
147s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
20/04/2024, 18:27

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General

Target

2024-04-20_15380fc451748e0b75e9fa778dbf0e66_cryptolocker.exe
Size

88KB
MD5

15380fc451748e0b75e9fa778dbf0e66
SHA1

3d7fac8da608577e1308f114e56ecf350ee562e1
SHA256

7c0c1711fb72096ea5bf2bf4e1ba7cf406149fba5a011d5f4ab6573b7cf5d60c
SHA512

8a0bde3ee726796e45ec834c46032f81745ed8fe250d135bbacab9198495836406bfd808af2bfd33eb718764d05584b34b3625ef9f0c12c836d552af0d9aae67
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAAE:n6a+1SEOtEvwDpjYYvQd2PT

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2148-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d00000000e655-11.dat	CryptoLocker_rule2
behavioral1/memory/604-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2148-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/604-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2148-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d00000000e655-11.dat	CryptoLocker_set1
behavioral1/memory/604-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2148-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/604-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2148-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000d00000000e655-11.dat	UPX
behavioral1/memory/604-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2148-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/604-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
604	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2148	2024-04-20_15380fc451748e0b75e9fa778dbf0e66_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2148-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000d00000000e655-11.dat	upx
behavioral1/memory/604-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2148-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/604-26-0x0000000000500000-0x0000000000510000-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 4 IoCs

description	pid	Process	procid_target
PID 2148 wrote to memory of 604	2148	2024-04-20_15380fc451748e0b75e9fa778dbf0e66_cryptolocker.exe	28
PID 2148 wrote to memory of 604	2148	2024-04-20_15380fc451748e0b75e9fa778dbf0e66_cryptolocker.exe	28
PID 2148 wrote to memory of 604	2148	2024-04-20_15380fc451748e0b75e9fa778dbf0e66_cryptolocker.exe	28
PID 2148 wrote to memory of 604	2148	2024-04-20_15380fc451748e0b75e9fa778dbf0e66_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-20_15380fc451748e0b75e9fa778dbf0e66_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_15380fc451748e0b75e9fa778dbf0e66_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2148
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:604

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
89KB

MD5
7119496aa4fd3c72b7ab0a2223ec5f3c

SHA1
f0daf9e88ecc8d9161949c99ac9f8c2ceb7f9ab2

SHA256
60739bc700b9e68912c225fc522f0e081296b39c66260f9cfa7fee463dd5dcc9

SHA512
1bc88ee347c52f37c09244ec195703f647013a7cba456968cef03d192fd882b45ec6d49363c04592e63fdc957674ccf6bd2cfc6179e51f66bdae8ed309201d49

Download Submit
memory/604-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/604-17-0x0000000000200000-0x0000000000206000-memory.dmp

Filesize
24KB

Download
memory/604-20-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/604-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2148-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2148-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2148-2-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2148-3-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2148-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download