b89013bdc8a7bdb2d850f9df28b24fa51d92c4ef7bd37c5df4159d0b7e200b7b

Analysis

max time kernel
150s
max time network
149s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
03/06/2024, 04:29

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General

Target

2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe
Size

35KB
MD5

65f24d49d4a1c8cdb982525360b4fc64
SHA1

c45a6f1be10b591a4c6b18d714c4f7dd438a5ae8
SHA256

b89013bdc8a7bdb2d850f9df28b24fa51d92c4ef7bd37c5df4159d0b7e200b7b
SHA512

89af6a9668827f2906e485314db1c7972fda8173185623b0223f8e4d95b168e139eda0c611441b891923bb989057825093eeefcbe86a73b8658a5db7e5174ff6
SSDEEP

768:bFPm5zusFUB2preAr+Ofjg0S16avdrQFiLjJvtXa:bFPmpiif/oc+vXa

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2868-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x00080000000122bf-11.dat	CryptoLocker_rule2
behavioral1/memory/2608-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2868-16-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2608-26-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2868-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/files/0x00080000000122bf-11.dat	UPX
behavioral1/memory/2608-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2868-16-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2608-26-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2608	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
2868	2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2868-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/files/0x00080000000122bf-11.dat	upx
behavioral1/memory/2608-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2868-16-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2608-26-0x0000000008000000-0x000000000800E000-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 2868 wrote to memory of 2608	2868	2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe	28
PID 2868 wrote to memory of 2608	2868	2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe	28
PID 2868 wrote to memory of 2608	2868	2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe	28
PID 2868 wrote to memory of 2608	2868	2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2608

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
35KB

MD5
84997313a51a04969098284256d8f02f

SHA1
740a0d183eaf3517a8bf08fe4a72b5ae021ea1ca

SHA256
863bd9e9e0fcf89a591d011f3a9154cb7f3c42c032120518ef52ce464ab42e6e

SHA512
56e144297584fd0fbcb39fcb8484fdad5d41935e3e154ca437904b2fab03fa08b687a8099f0c4d032ea5bca5fc2a02be9b837b98738b6a41c8eb14ff4d1b2e0b

Download Submit
memory/2608-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2608-26-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2868-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2868-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2868-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2868-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2868-16-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download