86ec547a3a889eb5612d058b9b1c8400a2f2d15ae543520fa502b05a4d844eb7

Analysis

max time kernel
10s
max time network
118s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
21/02/2024, 18:53

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General

Target

2024-02-21_f8568c3680c630d898e817b8dacc228c_cryptolocker.exe
Size

32KB
MD5

f8568c3680c630d898e817b8dacc228c
SHA1

79ded156e2232ed03fde272d29127d6eaaf09413
SHA256

86ec547a3a889eb5612d058b9b1c8400a2f2d15ae543520fa502b05a4d844eb7
SHA512

43264deb86b6a5b0e1fa93f4640291f96ca3deda549ba03be38cf5ae309c441dd0044f9daf5d215a806f2509dd3a29d4423c25a39517a8087668cc3f7263dc2a
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznUsD1w+w:b/yC4GyNM01GuQMNXw2PSjZHw

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000c00000001224f-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
1836	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2528	2024-02-21_f8568c3680c630d898e817b8dacc228c_cryptolocker.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2528	2024-02-21_f8568c3680c630d898e817b8dacc228c_cryptolocker.exe
1836	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2528 wrote to memory of 1836	2528	2024-02-21_f8568c3680c630d898e817b8dacc228c_cryptolocker.exe	28
PID 2528 wrote to memory of 1836	2528	2024-02-21_f8568c3680c630d898e817b8dacc228c_cryptolocker.exe	28
PID 2528 wrote to memory of 1836	2528	2024-02-21_f8568c3680c630d898e817b8dacc228c_cryptolocker.exe	28
PID 2528 wrote to memory of 1836	2528	2024-02-21_f8568c3680c630d898e817b8dacc228c_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-21_f8568c3680c630d898e817b8dacc228c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-21_f8568c3680c630d898e817b8dacc228c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2528
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:1836

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
32KB

MD5
f567e601d1039b5285948a34796bac67

SHA1
9ebe2a1dd7aa72c81078a389a1079dc56416f230

SHA256
c1e34e948d59590b7eefc71321f0d261d34da267d249f46f445cdd1454e9587c

SHA512
be868269f4912331be52d8383b009fc3aea3f8dc4a815ef18c2659a3daec65078450ba41b2f62fd27c177091bf4cafbc916ef271aa3c8e8bb84eae981d8ff293

Download Submit
memory/1836-18-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/2528-0-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2528-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2528-2-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download