7aef2629071b5fb86fc85cf378390ccf7771bb7a4ddd3389414c4039e5ff476a

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
29/05/2024, 11:27

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General

Target

2024-05-29_0449a85bb30115f97810332c072695a9_cryptolocker.exe
Size

53KB
MD5

0449a85bb30115f97810332c072695a9
SHA1

44c3f834b2c50ee3e81124f1c70f53c0b356df67
SHA256

7aef2629071b5fb86fc85cf378390ccf7771bb7a4ddd3389414c4039e5ff476a
SHA512

f50450ea28ad05c4d219688ea181591b1c3808f987dee55115eba92f6cbd13ab9f9d2b57a52e20b1cb196a5e29471d917f75577336a7676edcebb10f1e74fe7c
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOXs:bODOw9acifAoc+vH

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2924-1-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2924-13-0x0000000002BB0000-0x0000000002BBF000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d00000001230f-11.dat	CryptoLocker_rule2
behavioral1/memory/2924-16-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3040-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2924-1-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/2924-13-0x0000000002BB0000-0x0000000002BBF000-memory.dmp	UPX
behavioral1/files/0x000d00000001230f-11.dat	UPX
behavioral1/memory/2924-16-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/3040-26-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3040	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
2924	2024-05-29_0449a85bb30115f97810332c072695a9_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2924-1-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/2924-13-0x0000000002BB0000-0x0000000002BBF000-memory.dmp	upx
behavioral1/files/0x000d00000001230f-11.dat	upx
behavioral1/memory/2924-16-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/3040-26-0x0000000008000000-0x000000000800F000-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 4 IoCs

description	pid	Process	procid_target
PID 2924 wrote to memory of 3040	2924	2024-05-29_0449a85bb30115f97810332c072695a9_cryptolocker.exe	28
PID 2924 wrote to memory of 3040	2924	2024-05-29_0449a85bb30115f97810332c072695a9_cryptolocker.exe	28
PID 2924 wrote to memory of 3040	2924	2024-05-29_0449a85bb30115f97810332c072695a9_cryptolocker.exe	28
PID 2924 wrote to memory of 3040	2924	2024-05-29_0449a85bb30115f97810332c072695a9_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-29_0449a85bb30115f97810332c072695a9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_0449a85bb30115f97810332c072695a9_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2924
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3040

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\lossy.exe

Filesize
54KB

MD5
d6fa673aa0353694b9fe0bb5aa260c46

SHA1
1c441956f6e784219461260044f4cccb9093d3ac

SHA256
8397c9fe627ad21cc6ebf3c86cb2dd39ff2681d79f2ec153d40f0fef36bfadbf

SHA512
4ab8b3f032bb932c18e235b15c551fbf2673fba0d8e61649582ad8e88979abb750639d7de8abbdf43f2933f397906baaf3300e2e17edb3bec163b9d5493101d3

Download Submit
memory/2924-0-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/2924-1-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2924-2-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/2924-9-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/2924-13-0x0000000002BB0000-0x0000000002BBF000-memory.dmp

Filesize
60KB

Download
memory/2924-16-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3040-18-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/3040-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3040-25-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download