43a22394a89719a34435fecb84c20d51652a8cc13994bd31f720e73342528e7d

Analysis

max time kernel
144s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
13/02/2024, 13:08

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General

Target

2024-02-13_c2549664ca1bfc8f92b6b4b7e2108a7a_cryptolocker.exe
Size

57KB
MD5

c2549664ca1bfc8f92b6b4b7e2108a7a
SHA1

d0448728fc3f3110326c7a4bccdec476811d671b
SHA256

43a22394a89719a34435fecb84c20d51652a8cc13994bd31f720e73342528e7d
SHA512

52d7650a077d16d358edcaf5bc34a5a4f39d828811d4da7ad21610e9245657bc92309fb8ae91b8cdf769e19fa184505dfd5f3948a09968db363fe2895310975d
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61PTG:BbdDmjr+OtEvwDpjMY

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4136-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023224-13.dat	CryptoLocker_rule2
behavioral2/memory/4136-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4760-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4136-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4760-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4136-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023224-13.dat	UPX
behavioral2/memory/4136-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4760-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	2024-02-13_c2549664ca1bfc8f92b6b4b7e2108a7a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4760	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 4136 wrote to memory of 4760	4136	2024-02-13_c2549664ca1bfc8f92b6b4b7e2108a7a_cryptolocker.exe	84
PID 4136 wrote to memory of 4760	4136	2024-02-13_c2549664ca1bfc8f92b6b4b7e2108a7a_cryptolocker.exe	84
PID 4136 wrote to memory of 4760	4136	2024-02-13_c2549664ca1bfc8f92b6b4b7e2108a7a_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-13_c2549664ca1bfc8f92b6b4b7e2108a7a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-13_c2549664ca1bfc8f92b6b4b7e2108a7a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4136
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4760

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
57KB

MD5
98a6d9bf4d66249fef3607221661488c

SHA1
db9eab97e87122c95795d96f70f52114e5ed886e

SHA256
9910a04703769eb0f58aee7246fdbcd2ce23d4f205a0f9686aac5afb1951ddb8

SHA512
6e17e0925467a96cccc2b8e7c75648b2819976f749fc26370ae1fdd1bf3ddc03111b1bc80ec34bb18d8e56f8fe5ec2dfbeb38af235d163a5b0c522c2ea326b08

Download Submit
memory/4136-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4136-1-0x0000000000830000-0x0000000000836000-memory.dmp

Filesize
24KB

Download
memory/4136-2-0x0000000000830000-0x0000000000836000-memory.dmp

Filesize
24KB

Download
memory/4136-3-0x0000000000850000-0x0000000000856000-memory.dmp

Filesize
24KB

Download
memory/4136-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4760-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4760-20-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4760-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download