612e64a903c06462fabdf92898b38607f5f1fa5db7acfd2acb8854429baf18ad

Analysis

max time kernel
150s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
28/04/2024, 05:50

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General

Target

2024-04-28_f40a8e0c9f12e5c5f4af8914c014a710_cryptolocker.exe
Size

45KB
MD5

f40a8e0c9f12e5c5f4af8914c014a710
SHA1

9a4d2ac3040722e2c6901b3e46eccb173e487825
SHA256

612e64a903c06462fabdf92898b38607f5f1fa5db7acfd2acb8854429baf18ad
SHA512

d085b0068c67c49f07d8c0381014adf37b3eadab1f4f630dc03f166e28b523c700ebb84d2c17d858936d1b18c7324dd5dead6e360f34cacfd441fe91ab5848a4
SSDEEP

768:P6LsoEEeegiZPvEhHS5+Mh/QtOOtEvwDpjBpaD3TUogs/VXpAPH:P6QFElP6k+MRQMOtEvwDpjBQpVXC

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3748-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b3d-13.dat	CryptoLocker_rule2
behavioral2/memory/1380-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3748-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1380-27-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3748-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b3d-13.dat	CryptoLocker_set1
behavioral2/memory/1380-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3748-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1380-27-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation	2024-04-28_f40a8e0c9f12e5c5f4af8914c014a710_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1380	asih.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3748 wrote to memory of 1380	3748	2024-04-28_f40a8e0c9f12e5c5f4af8914c014a710_cryptolocker.exe	84
PID 3748 wrote to memory of 1380	3748	2024-04-28_f40a8e0c9f12e5c5f4af8914c014a710_cryptolocker.exe	84
PID 3748 wrote to memory of 1380	3748	2024-04-28_f40a8e0c9f12e5c5f4af8914c014a710_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-28_f40a8e0c9f12e5c5f4af8914c014a710_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_f40a8e0c9f12e5c5f4af8914c014a710_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3748
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
45KB

MD5
e48d95ee5a4bd9fd36ffcb84208d65a7

SHA1
a8ca82c2bf48cb6867021b0051c7f92dad5b3f05

SHA256
c0390c86897e2c9393c89ffbe855712b73fe50b6777b22cf3e865f762fb09425

SHA512
4f5c4d990cbc2d18f75312427e792444aee8a276e839d964ad784931ad251a882036f3c27baf4c9703ce0469e45ca1299293e70da64bc73700a76aa93d162601

Download Submit
memory/1380-18-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/1380-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1380-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1380-27-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3748-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3748-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3748-2-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/3748-9-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3748-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download