ca3efde04d26baf34854344b308fd108f84a7e3fe3ec92ddd66f73315086a1a1

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08/04/2024, 12:53

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General

Target

2024-04-08_d5228b0daa2a9b826a5ce7b19629553f_cryptolocker.exe
Size

45KB
MD5

d5228b0daa2a9b826a5ce7b19629553f
SHA1

d98633ecd5378ab5f9b510605677571d280ad7f7
SHA256

ca3efde04d26baf34854344b308fd108f84a7e3fe3ec92ddd66f73315086a1a1
SHA512

a5c118016c6ebead96058adf9038e7d537e2ae4728b62e7a8b8fe9d1d0ddf17a2f38e7be1992890ffd256b2ab864e266f91d929e7a35cfc22594b5e75691e32a
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoLn:qmbhXDmjr5MOtEvwDpj5cDtKkQZQd

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2356-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002323e-13.dat	CryptoLocker_rule2
behavioral2/memory/2356-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4592-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/2356-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4592-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2356-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002323e-13.dat	UPX
behavioral2/memory/2356-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4592-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-04-08_d5228b0daa2a9b826a5ce7b19629553f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4592	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 2356 wrote to memory of 4592	2356	2024-04-08_d5228b0daa2a9b826a5ce7b19629553f_cryptolocker.exe	88
PID 2356 wrote to memory of 4592	2356	2024-04-08_d5228b0daa2a9b826a5ce7b19629553f_cryptolocker.exe	88
PID 2356 wrote to memory of 4592	2356	2024-04-08_d5228b0daa2a9b826a5ce7b19629553f_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-04-08_d5228b0daa2a9b826a5ce7b19629553f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-08_d5228b0daa2a9b826a5ce7b19629553f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2356
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4592

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
c9e4bc9218bbc5c1270955696abb404b

SHA1
4ec41633095c6eff6aa3615ae48bd64159ff639d

SHA256
8026f2e847b2d42b82b45c5c7e9bb76d1fc1f97810c99eb2414ae8d5f4d49db0

SHA512
6be14e3e8803784bc575afa524918417c99c50b95565a76f8ec6b9c04e7622b8db6e7f9905acf4551c7f87163a58dff18fdb02ebb7ace3bb2cace1dcf096f406

Download Submit
memory/2356-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2356-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2356-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2356-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/2356-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4592-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4592-20-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4592-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download