f6409bd73fff0fe63c8c26c7a614205c4d49c16990e4a5113cb6866fce81edac

Analysis

max time kernel
150s
max time network
153s
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, 10:09

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General

Target

2024-04-28_92f21d1d835df37a79e8ea4c6ff738a3_cryptolocker.exe
Size

43KB
MD5

92f21d1d835df37a79e8ea4c6ff738a3
SHA1

0154d2a28aa8ca9b92de0f3cf48cc7d0278b5af3
SHA256

f6409bd73fff0fe63c8c26c7a614205c4d49c16990e4a5113cb6866fce81edac
SHA512

887ff3dbec0967aa64f833e872a05c979903a587977a11e4fa6c46ce3e3d151dfbc2d2a5f1b8a55e97a752301f08034a6f40ee0b6d1dd673d1fae267cebc353e
SSDEEP

384:bm74uGLLQRcsdeQ72ngEr4K7YmE8jo0nrlwfjDUJZ:bm74zYcgT/Ekn0ryfjqZ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4376-0-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023b82-13.dat	CryptoLocker_rule2
behavioral2/memory/4376-17-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3032-18-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3032-27-0x0000000008000000-0x000000000800D000-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-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-04-28_92f21d1d835df37a79e8ea4c6ff738a3_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3032	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 4376 wrote to memory of 3032	4376	2024-04-28_92f21d1d835df37a79e8ea4c6ff738a3_cryptolocker.exe	83
PID 4376 wrote to memory of 3032	4376	2024-04-28_92f21d1d835df37a79e8ea4c6ff738a3_cryptolocker.exe	83
PID 4376 wrote to memory of 3032	4376	2024-04-28_92f21d1d835df37a79e8ea4c6ff738a3_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-28_92f21d1d835df37a79e8ea4c6ff738a3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_92f21d1d835df37a79e8ea4c6ff738a3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4376
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:3032

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
9e86848b7a3c687268597680a5bd5d28

SHA1
96907db0ecc983382df005a412eab53f2f42e7b1

SHA256
8fa163c7e55fb797569990ab468b9557358ee9b05c35c0dbe36a5f1519052b8d

SHA512
941d20f6d0cac5b5a25c834b6a11c090445178deccdd32230d5181ee30c69a1c912af52431dfba41ea47a510ef868e945de61b8bda1aaee286f88e5a811bac28

Download Submit
memory/3032-18-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/3032-20-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/3032-26-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/3032-27-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/4376-0-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/4376-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4376-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/4376-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4376-17-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download