84c758c28c5c0429ae6871022854e32576f443ef230854c546ac8a0943594a77

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
25-05-2024 02:55

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General

Target

2024-05-25_b2c193632dfcb9deef85278af00f50bc_cryptolocker.exe
Size

41KB
MD5

b2c193632dfcb9deef85278af00f50bc
SHA1

48270448673a0678228488415d82c6528ee1bdb3
SHA256

84c758c28c5c0429ae6871022854e32576f443ef230854c546ac8a0943594a77
SHA512

581bd4367f7a83ac51d1c8c6874623172f03213da3b92f1f82b4dc4979c56cd0a5e036daad92d141b3b8f1ee1c34127269c679a5fbf6be99ed4a677ae7999ef7
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAn7l:bCDOw9aMDooc+vA7l

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2880-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d00000001232e-11.dat	CryptoLocker_rule2
behavioral1/memory/2880-13-0x0000000002870000-0x000000000287A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2880-16-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2300-26-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2300	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
2880	2024-05-25_b2c193632dfcb9deef85278af00f50bc_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 2880 wrote to memory of 2300	2880	2024-05-25_b2c193632dfcb9deef85278af00f50bc_cryptolocker.exe	28
PID 2880 wrote to memory of 2300	2880	2024-05-25_b2c193632dfcb9deef85278af00f50bc_cryptolocker.exe	28
PID 2880 wrote to memory of 2300	2880	2024-05-25_b2c193632dfcb9deef85278af00f50bc_cryptolocker.exe	28
PID 2880 wrote to memory of 2300	2880	2024-05-25_b2c193632dfcb9deef85278af00f50bc_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-25_b2c193632dfcb9deef85278af00f50bc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_b2c193632dfcb9deef85278af00f50bc_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2880
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2300

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
c8be77ae788839e3dd14c6fc011dff4b

SHA1
e44c58bad98f7ba464c616efd79182459e0ef30f

SHA256
40b9845478e2163c4e4ddb73f3b8af25341ad4c5870938f071e740b76f2f3906

SHA512
7da40bec49a60e5cf928cf5b03e9ef8c7bb006277278c93c144a11db82f8867562ca5ce8815874faac8f0ae189c48b2b21d641a0f03f3104464750563a1f077c

Download Submit
memory/2300-18-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2300-25-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2300-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2880-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2880-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2880-2-0x0000000001C90000-0x0000000001C96000-memory.dmp

Filesize
24KB

Download
memory/2880-9-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2880-13-0x0000000002870000-0x000000000287A000-memory.dmp

Filesize
40KB

Download
memory/2880-16-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download