e3c956a1bac7939afa95dbe3c61cac4696b936af61ebe3212988997e5576e1dc

Analysis

max time kernel
11s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
08/03/2024, 16:25

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General

Target

2024-03-08_46048bb31e31066222bc6a738678a55c_cryptolocker.exe
Size

35KB
MD5

46048bb31e31066222bc6a738678a55c
SHA1

a4174fd4747f7513a7046fa227c96e9cfbf251d6
SHA256

e3c956a1bac7939afa95dbe3c61cac4696b936af61ebe3212988997e5576e1dc
SHA512

7120edb610c7d21d30ccf27178299702b9326f7c68d1e8f3081db86948c4ff4022f71234225746336745e58d7da94e2f8772f79b1e4e5a4e13ee90fc87129de9
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZQYFxG:b/yC4GyNM01GuQMNXw2PSj1POaG

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000b000000012257-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2612	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2012	2024-03-08_46048bb31e31066222bc6a738678a55c_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
2012	2024-03-08_46048bb31e31066222bc6a738678a55c_cryptolocker.exe
2612	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2012 wrote to memory of 2612	2012	2024-03-08_46048bb31e31066222bc6a738678a55c_cryptolocker.exe	28
PID 2012 wrote to memory of 2612	2012	2024-03-08_46048bb31e31066222bc6a738678a55c_cryptolocker.exe	28
PID 2012 wrote to memory of 2612	2012	2024-03-08_46048bb31e31066222bc6a738678a55c_cryptolocker.exe	28
PID 2012 wrote to memory of 2612	2012	2024-03-08_46048bb31e31066222bc6a738678a55c_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-08_46048bb31e31066222bc6a738678a55c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_46048bb31e31066222bc6a738678a55c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2012
- 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:2612

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
35KB

MD5
85d8725dca9f454c23378205c242cc86

SHA1
b11d4ff6b09293c253bdd2f93c02fa715dbe9914

SHA256
f33dbc74267a749b1c1e294c1060bdbbf04afa7a322e5a6b70244329f5700f72

SHA512
eb034f1b63926ca17d18f3c74b0bbdd44aeff2607b41a4aae61ec577319856fe3db09b6d62893249798ed5fae3e3236b2b6e368962119c147747062984cc84c9

Download Submit
memory/2012-0-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2012-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2012-4-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2612-19-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download