c7a3c663bc5268c5bd686dbe93fb933ab569da389392ac72110338464542aaed

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
18/01/2024, 23:16

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General

Target

2024-01-18_b71cef4921e111167b13f6bc696fff6a_cryptolocker.exe
Size

63KB
MD5

b71cef4921e111167b13f6bc696fff6a
SHA1

52b14976e6674344fdfc5dfa1b9b65ef9be51614
SHA256

c7a3c663bc5268c5bd686dbe93fb933ab569da389392ac72110338464542aaed
SHA512

7c8cfa6e091e29411e94f5942333003c1f982b775761ef617da098be2299f76400af8b5823f1cbb7cff77eff2b40328b990f5c1de8463876b74c3f684b7b1574
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6UAX7:1nK6a+qdOOtEvwDpj7

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1520-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x00070000000122c9-11.dat	CryptoLocker_rule2
behavioral1/memory/1520-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2488-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2488-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1520-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x00070000000122c9-11.dat	CryptoLocker_set1
behavioral1/memory/1520-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2488-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2488-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1520-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x00070000000122c9-11.dat	UPX
behavioral1/memory/1520-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2488-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2488-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2488	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1520	2024-01-18_b71cef4921e111167b13f6bc696fff6a_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1520-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x00070000000122c9-11.dat	upx
behavioral1/memory/1520-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2488-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2488-26-0x0000000000500000-0x000000000050F311-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 1520 wrote to memory of 2488	1520	2024-01-18_b71cef4921e111167b13f6bc696fff6a_cryptolocker.exe	28
PID 1520 wrote to memory of 2488	1520	2024-01-18_b71cef4921e111167b13f6bc696fff6a_cryptolocker.exe	28
PID 1520 wrote to memory of 2488	1520	2024-01-18_b71cef4921e111167b13f6bc696fff6a_cryptolocker.exe	28
PID 1520 wrote to memory of 2488	1520	2024-01-18_b71cef4921e111167b13f6bc696fff6a_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-18_b71cef4921e111167b13f6bc696fff6a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-18_b71cef4921e111167b13f6bc696fff6a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1520
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2488

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

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Downloads

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

Filesize
64KB

MD5
a7cbf13a3d4fe51c8e81328f6e878121

SHA1
83041fb344dbdecab07c3733c2c24587a09e593f

SHA256
359db14cd1c7426bfc644fc40509980738a029314d204daf9d4a82e5fe439fc1

SHA512
5e0f5c6bb245f29b865be55f6e1674b6d6a3960545b2ba29566ad5c037a842175ba5ea8db0b384daed058f5c5c21b50e9eda862688262fe9c2240bf516055d6f

Download Submit
memory/1520-2-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/1520-1-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/1520-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1520-9-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/1520-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2488-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2488-18-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2488-20-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2488-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download