30b6722b62da5d86aed00f615584b8deb40bb7f5ee02cf4d16a97e6018cff938

Analysis

max time kernel
9s
max time network
121s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
21/05/2024, 08:44

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General

Target

2024-05-21_629f757f75162ea7ad255f783e969cf6_cryptolocker.exe
Size

44KB
MD5

629f757f75162ea7ad255f783e969cf6
SHA1

c4a4bf99bb501477bddf5a40488982af4d2d695a
SHA256

30b6722b62da5d86aed00f615584b8deb40bb7f5ee02cf4d16a97e6018cff938
SHA512

811f2246b6a60e329d29cda408fec0942680a3276c53d4ec7afcc2719751c6e434d308824e3845f3f3ee0edba803ce3780f121cdfc11c43cb9ae7296934e459a
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAv:b/pYayGig5HjS3NPAv

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000e00000001214d-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
1888	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2548	2024-05-21_629f757f75162ea7ad255f783e969cf6_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
2548	2024-05-21_629f757f75162ea7ad255f783e969cf6_cryptolocker.exe
1888	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2548 wrote to memory of 1888	2548	2024-05-21_629f757f75162ea7ad255f783e969cf6_cryptolocker.exe	28
PID 2548 wrote to memory of 1888	2548	2024-05-21_629f757f75162ea7ad255f783e969cf6_cryptolocker.exe	28
PID 2548 wrote to memory of 1888	2548	2024-05-21_629f757f75162ea7ad255f783e969cf6_cryptolocker.exe	28
PID 2548 wrote to memory of 1888	2548	2024-05-21_629f757f75162ea7ad255f783e969cf6_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-21_629f757f75162ea7ad255f783e969cf6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_629f757f75162ea7ad255f783e969cf6_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2548
- 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:1888

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

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

Filesize
44KB

MD5
112466391b9d5ea53bc45e107c01f6ea

SHA1
d84fac07ad6c8c3d57ff73fd866e6cb5edb43945

SHA256
0c0cb1e6a23bf304862ce060a2e302ee74db5d91aa33928e7697930cc456b9e5

SHA512
18733a6bf5c9d6513402592e65c5a286e9c45ff3fa6ca1768dc775a1fd32c15005b9f635136af01f2af68393cd253fa6e846a2b01d0ecdda1347ae2e8a5de691

Download Submit
memory/1888-23-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2548-0-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2548-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2548-8-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download