11854e3429a225caab97800ccc21b5809391d75bc19a9eb7aa53142a04c31139

Analysis

max time kernel
24s
max time network
125s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25-01-2024 17:40

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General

Target

2024-01-25_ea7874276a66ec5044e1143e63468a6c_cryptolocker.exe
Size

40KB
MD5

ea7874276a66ec5044e1143e63468a6c
SHA1

b5416c9ef60fb6e80a8b35c73096739bba6b5103
SHA256

11854e3429a225caab97800ccc21b5809391d75bc19a9eb7aa53142a04c31139
SHA512

9b4e043ce120821a01b64c182cf3a9b4ce339e31f5f5cef5c968e57fe20f5ccb2cd26432f31a9958d0a4ed051c5da103969e43fee4db5c9fe5ab1a47ad3235d0
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAl:b/pYayGig5HjS3NPAl

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\retln.exe	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid process

2552 retln.exe
Loads dropped DLL 1 IoCs

Processes:

2024-01-25_ea7874276a66ec5044e1143e63468a6c_cryptolocker.exe

pid process

2512 2024-01-25_ea7874276a66ec5044e1143e63468a6c_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

Processes:

2024-01-25_ea7874276a66ec5044e1143e63468a6c_cryptolocker.exeretln.exe

pid process

2512 2024-01-25_ea7874276a66ec5044e1143e63468a6c_cryptolocker.exe
2552 retln.exe

pid	process
2552	retln.exe

pid	process
2512	2024-01-25_ea7874276a66ec5044e1143e63468a6c_cryptolocker.exe

pid	process
2512	2024-01-25_ea7874276a66ec5044e1143e63468a6c_cryptolocker.exe
2552	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-01-25_ea7874276a66ec5044e1143e63468a6c_cryptolocker.exe

description	pid	process	target process
PID 2512 wrote to memory of 2552	2512	2024-01-25_ea7874276a66ec5044e1143e63468a6c_cryptolocker.exe	retln.exe
PID 2512 wrote to memory of 2552	2512	2024-01-25_ea7874276a66ec5044e1143e63468a6c_cryptolocker.exe	retln.exe
PID 2512 wrote to memory of 2552	2512	2024-01-25_ea7874276a66ec5044e1143e63468a6c_cryptolocker.exe	retln.exe
PID 2512 wrote to memory of 2552	2512	2024-01-25_ea7874276a66ec5044e1143e63468a6c_cryptolocker.exe	retln.exe

C:\Users\Admin\AppData\Local\Temp\2024-01-25_ea7874276a66ec5044e1143e63468a6c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_ea7874276a66ec5044e1143e63468a6c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2512

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:2552

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
40KB

MD5
de62a7743c4c71fcec4257123607e52e

SHA1
dfef3a4c0642c136ba1fa5ed42bbd2ccfded0301

SHA256
df3874fb900f5089552fd597f9057f80b54750884fa2b58c11071a033bb00232

SHA512
e88bdff82705e7bb295eb54e1d6c95903173189c26dbcd9f1586c0ba1a4a17caba46e9853bedb1f1dc4460345cacd069df570d34db2fa3828da2d562d005a4f1

Download Submit
memory/2512-0-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2512-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2512-1-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2552-23-0x00000000002E0000-0x00000000002E6000-memory.dmp

Filesize
24KB

Download