81731f3081068517bfa106cf905026c096c4654f1f4a857ec645f3e33337e8c3

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
28/04/2024, 00:23

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General

Target

2024-04-28_066ecb3cfc9b34f38c48a69c7c174dab_cryptolocker.exe
Size

42KB
MD5

066ecb3cfc9b34f38c48a69c7c174dab
SHA1

6bcfdd6080c4806ae798ab15c7187f34abd83fd3
SHA256

81731f3081068517bfa106cf905026c096c4654f1f4a857ec645f3e33337e8c3
SHA512

46a7f7fda975717d770eb1583dc87672fa2b91ea922d088f21146ecf28341e0fd23dfd9148039190a64290fa76a4473bf7699df488e490ef3e095419113fd694
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAHS:bCDOw9aMDooc+vAy

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1132-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c0000000144e4-11.dat	CryptoLocker_rule2
behavioral1/memory/1132-15-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2840-16-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2840-26-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2840	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
1132	2024-04-28_066ecb3cfc9b34f38c48a69c7c174dab_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 1132 wrote to memory of 2840	1132	2024-04-28_066ecb3cfc9b34f38c48a69c7c174dab_cryptolocker.exe	28
PID 1132 wrote to memory of 2840	1132	2024-04-28_066ecb3cfc9b34f38c48a69c7c174dab_cryptolocker.exe	28
PID 1132 wrote to memory of 2840	1132	2024-04-28_066ecb3cfc9b34f38c48a69c7c174dab_cryptolocker.exe	28
PID 1132 wrote to memory of 2840	1132	2024-04-28_066ecb3cfc9b34f38c48a69c7c174dab_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-28_066ecb3cfc9b34f38c48a69c7c174dab_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_066ecb3cfc9b34f38c48a69c7c174dab_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1132
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2840

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
42KB

MD5
84c0c5e543d6bf6cb8814a148a6b8320

SHA1
40f5e7173b3d339f9e00a18e32bb5d9bc9428d40

SHA256
bee3b845a8a533a37983762f6f4e8528a94ca65d1e85081cfa82f84cd067c557

SHA512
4517e3ad41a7aa19f62ccae1ae6a2232003798194707d341daf6947d6c85ad3d3f7184ea1660c81c4ee234915af2865b9254e523d343b020bcdd2b7e02486912

Download Submit
memory/1132-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1132-1-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/1132-2-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/1132-9-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/1132-15-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2840-16-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2840-18-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2840-25-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2840-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download