fe6be6fc37671bdb48cfd9a7cdb61c4b6edebc870d15513191a9e1d0bdc6437f

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
08-05-2024 04:37

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General

Target

2024-05-08_62506e5dda12384d4813184c2018f32e_cryptolocker.exe
Size

43KB
MD5

62506e5dda12384d4813184c2018f32e
SHA1

6cd66c13449d06268df33e0c716d1a7dfec156a2
SHA256

fe6be6fc37671bdb48cfd9a7cdb61c4b6edebc870d15513191a9e1d0bdc6437f
SHA512

3f09e826f8dcdd8864531f76699d885d9a16027cc67f6e21b6046f914005ddb9e708e0f323268c35bcb90b543f80e7451a0a9bee84439b79ddd11d003be81dd4
SSDEEP

384:bm74uGLLQRcsdeQ72ngEr4K7YmE8jb0nrlwfjDUadQA:bm74zYcgT/EkM0ryfjPdQA

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1116-0-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023b31-13.dat	CryptoLocker_rule2
behavioral2/memory/1408-17-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1116-18-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1408-27-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2

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-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	2024-05-08_62506e5dda12384d4813184c2018f32e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1408	hasfj.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 1116 wrote to memory of 1408	1116	2024-05-08_62506e5dda12384d4813184c2018f32e_cryptolocker.exe	84
PID 1116 wrote to memory of 1408	1116	2024-05-08_62506e5dda12384d4813184c2018f32e_cryptolocker.exe	84
PID 1116 wrote to memory of 1408	1116	2024-05-08_62506e5dda12384d4813184c2018f32e_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-08_62506e5dda12384d4813184c2018f32e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-08_62506e5dda12384d4813184c2018f32e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1116
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:1408

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\hasfj.exe

Filesize
43KB

MD5
1fa49aef8f56e968d13c9d588423d1b5

SHA1
9aee2b9656cc0ac1adde978d3f83d1646e402a70

SHA256
048da580cc1d783ba1ca0d75325da58ee0a0b0194d3fa414d5d51c4a1b323e68

SHA512
acd34f701d35a19dd75ef51a27e89d3406f365486fe545a269021a270c63527f1e5daa371f97b4388a4378e9670a2d9d19aa93c5c01cfdc3013dfb5048e6fa14

Download Submit
memory/1116-0-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/1116-1-0x0000000002150000-0x0000000002156000-memory.dmp

Filesize
24KB

Download
memory/1116-2-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/1116-9-0x0000000002150000-0x0000000002156000-memory.dmp

Filesize
24KB

Download
memory/1116-18-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/1408-17-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/1408-20-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/1408-26-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/1408-27-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download