03aaf69b5743766011decf3fd8eab699db05ac686447ec84459995ecf46a639f

Analysis

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

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
03/05/2024, 23:29

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General

Target

2024-05-03_88c5a5e1e0a4fcaf8061c7dd6364e4de_cryptolocker.exe
Size

63KB
MD5

88c5a5e1e0a4fcaf8061c7dd6364e4de
SHA1

8001bf6eb2780444084f132c3c84ba132b1e1d7e
SHA256

03aaf69b5743766011decf3fd8eab699db05ac686447ec84459995ecf46a639f
SHA512

0eaa193c6c66c44a096cd88ecbd16d20188c4d662cb9953840a3007edeab2767995ce2ec7e1bb8cc93f8f764f0b28c3de3a7f14f67edb204dd841ef4b217b170
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsi+:BbdDmjr+OtEvwDpjM8b

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4960-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b3d-13.dat	CryptoLocker_rule2
behavioral2/memory/4960-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2972-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4960-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2972-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4960-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c000000023b3d-13.dat	UPX
behavioral2/memory/4960-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2972-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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	2024-05-03_88c5a5e1e0a4fcaf8061c7dd6364e4de_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2972	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 4960 wrote to memory of 2972	4960	2024-05-03_88c5a5e1e0a4fcaf8061c7dd6364e4de_cryptolocker.exe	84
PID 4960 wrote to memory of 2972	4960	2024-05-03_88c5a5e1e0a4fcaf8061c7dd6364e4de_cryptolocker.exe	84
PID 4960 wrote to memory of 2972	4960	2024-05-03_88c5a5e1e0a4fcaf8061c7dd6364e4de_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-03_88c5a5e1e0a4fcaf8061c7dd6364e4de_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_88c5a5e1e0a4fcaf8061c7dd6364e4de_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4960
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2972

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
63KB

MD5
8d85feb25fcffdab1f1a7887686132fd

SHA1
a26c7ca3399e7c852b253366da7b68129548bc2c

SHA256
4abe32994ad40d68b752da251056563aaace945dd8e8d3a76c0cbdd9aab60363

SHA512
0df96b29c537ee31daadf280fe8575a6119820c935091b3c214f3b4f2ca3237822e0a3aa11543bc7b389e52d294b5a39649b9c2bcff210364aaadb4d39c2e3cd

Download Submit
memory/2972-20-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/2972-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2972-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4960-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4960-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4960-2-0x0000000000680000-0x0000000000686000-memory.dmp

Filesize
24KB

Download
memory/4960-9-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4960-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download