4033b890b7620ba7b5c09ef577e1c78bcfedb93bff7646b2251c375558ddc7de

Analysis

max time kernel
149s
max time network
154s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
19-04-2024 04:13

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General

Target

2024-04-19_8fcf08dfa7e777fd4dac713b82a3f8e2_cryptolocker.exe
Size

41KB
MD5

8fcf08dfa7e777fd4dac713b82a3f8e2
SHA1

9c578dfe4a5897f6639ffd8b30582a948a587fef
SHA256

4033b890b7620ba7b5c09ef577e1c78bcfedb93bff7646b2251c375558ddc7de
SHA512

436eea091f4509bc387d2064a8a49d52dca85961972ef2937051d2a0fb8e5c4e5f8df18c3cce9f09233f79e3bba40f98023556ab4693aa68a370bc34caff92e6
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAHF:bCDOw9aMDooc+vAl

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1648-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x00050000000120fe-11.dat	CryptoLocker_rule2
behavioral1/memory/1648-15-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2980-16-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2980-25-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2980	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
1648	2024-04-19_8fcf08dfa7e777fd4dac713b82a3f8e2_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 1648 wrote to memory of 2980	1648	2024-04-19_8fcf08dfa7e777fd4dac713b82a3f8e2_cryptolocker.exe	28
PID 1648 wrote to memory of 2980	1648	2024-04-19_8fcf08dfa7e777fd4dac713b82a3f8e2_cryptolocker.exe	28
PID 1648 wrote to memory of 2980	1648	2024-04-19_8fcf08dfa7e777fd4dac713b82a3f8e2_cryptolocker.exe	28
PID 1648 wrote to memory of 2980	1648	2024-04-19_8fcf08dfa7e777fd4dac713b82a3f8e2_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-19_8fcf08dfa7e777fd4dac713b82a3f8e2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-19_8fcf08dfa7e777fd4dac713b82a3f8e2_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1648
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2980

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
41KB

MD5
c03378c54f5e689aac5aa0999a3f466b

SHA1
9d67c2994823e1f52977dd20ebf2ec63b3f96657

SHA256
7a353f7d1edbedbe53793a16cabbad42b06a3b9b7ed26b17dc63cfcb683f5a90

SHA512
46597451f124e1ae1b3e36de5e0644f187d645dd933e49d28d8917b605281800dee323689803f314a521ea61e5dfa65cc5b32b172013eff91440b4a9a9db82af

Download Submit
memory/1648-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1648-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1648-2-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/1648-4-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1648-15-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2980-16-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2980-18-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/2980-25-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download