c86b089a7a12ba0ca1f308b2935064677bf9927ea86cef916e29f185343dc3d7

Analysis

max time kernel
11s
max time network
124s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25-01-2024 17:22

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General

Target

2024-01-25_09a134c8ae5e847477ea745935195a08_cryptolocker.exe
Size

31KB
MD5

09a134c8ae5e847477ea745935195a08
SHA1

ded0efbc9d2ae2f3d05d688de32396d094019d58
SHA256

c86b089a7a12ba0ca1f308b2935064677bf9927ea86cef916e29f185343dc3d7
SHA512

860ab67122bb4052f51026a7b1d4844722963ff4c1a9268651a9f6bf47fd80c22ecdba17ec02516dd0a6cc2e897785be11b2224d789c606fdfa6c1b5116b3a89
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznUsD3W:b/yC4GyNM01GuQMNXw2PSjZG

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

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

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid process

2700 retln.exe
Loads dropped DLL 1 IoCs

Processes:

2024-01-25_09a134c8ae5e847477ea745935195a08_cryptolocker.exe

pid process

2424 2024-01-25_09a134c8ae5e847477ea745935195a08_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_09a134c8ae5e847477ea745935195a08_cryptolocker.exeretln.exe

pid process

2424 2024-01-25_09a134c8ae5e847477ea745935195a08_cryptolocker.exe
2700 retln.exe

pid	process
2700	retln.exe

pid	process
2424	2024-01-25_09a134c8ae5e847477ea745935195a08_cryptolocker.exe

pid	process
2424	2024-01-25_09a134c8ae5e847477ea745935195a08_cryptolocker.exe
2700	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-01-25_09a134c8ae5e847477ea745935195a08_cryptolocker.exe

description	pid	process	target process
PID 2424 wrote to memory of 2700	2424	2024-01-25_09a134c8ae5e847477ea745935195a08_cryptolocker.exe	retln.exe
PID 2424 wrote to memory of 2700	2424	2024-01-25_09a134c8ae5e847477ea745935195a08_cryptolocker.exe	retln.exe
PID 2424 wrote to memory of 2700	2424	2024-01-25_09a134c8ae5e847477ea745935195a08_cryptolocker.exe	retln.exe
PID 2424 wrote to memory of 2700	2424	2024-01-25_09a134c8ae5e847477ea745935195a08_cryptolocker.exe	retln.exe

C:\Users\Admin\AppData\Local\Temp\retln.exe
"C:\Users\Admin\AppData\Local\Temp\retln.exe"
1⤵
- Executes dropped EXE
- Suspicious use of UnmapMainImage
PID:2700

C:\Users\Admin\AppData\Local\Temp\2024-01-25_09a134c8ae5e847477ea745935195a08_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_09a134c8ae5e847477ea745935195a08_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2424

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe
Filesize
31KB

MD5
286771c2f7c0ea34454b64f1aac4eac9

SHA1
f7ceaadd9f036cac2802283cdd1ea88bb7a7724a

SHA256
7739dd43b909c7a896765f381146d37faab943de7922f5f904b44c0672ccb8ab

SHA512
be9f50d35c188c58d80ed1bf3e4fc74a1b0c9aa66df407903f70da6c113456149465074c387dabb65432a9e01525c16b6e755eb720aec2da16e21d974d8d43c1

Download Submit
memory/2424-8-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2424-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2424-0-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download