f01407f68512170c6ee2ad142c7712611896b9e920bc96263450e727ed7101c2

Analysis

max time kernel
19s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
27/03/2024, 04:33

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General

Target

2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe
Size

35KB
MD5

c251aa69577c42bf567ec4578f7054d4
SHA1

a22dfe5fde528e1b2c7d261b8608c6e9da4785c5
SHA256

f01407f68512170c6ee2ad142c7712611896b9e920bc96263450e727ed7101c2
SHA512

684be14732dda84471595d1088ede50d1894b5e0d7e300db9ee9b8eeb7bc8aaef40ccab50e30394e2456bc460e3ea3ce36e6fe3db3b2897671d020140ead630c
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzu02lOQAUAMHI:b/yC4GyNM01GuQMNXw2PSjHC02ltAUAB

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000c0000000133c1-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
3060	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1680	2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe

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
1680	2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe
3060	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1680 wrote to memory of 3060	1680	2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe	28
PID 1680 wrote to memory of 3060	1680	2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe	28
PID 1680 wrote to memory of 3060	1680	2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe	28
PID 1680 wrote to memory of 3060	1680	2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1680
- 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:3060

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\retln.exe

Filesize
35KB

MD5
6e9b95b8963841dadb46634574922db7

SHA1
9908c59b731a52f610f88e264762bcc834fca060

SHA256
1afedff3351f45db99da77e54e894b47a1046951a70db17bbc1224a7fad07177

SHA512
7b9f8c76c7fc929267fb4964b6e6267f9914e32a1199a9334f53dfaf9c7b6f5bfe5b9cffd5a090b30cf01f9d54ceded66228a6df760a4dd90965a04800680931

Download Submit
memory/1680-0-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/1680-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1680-3-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/3060-23-0x00000000003A0000-0x00000000003A6000-memory.dmp

Filesize
24KB

Download