bfdebbe5a8186a957b388bb9f6adc834a342aed9c36599373463fb646b40d5a4

Analysis

max time kernel
138s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 17:38

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General

Target

2024-02-12_6e112763cc73731af334545b72204cb7_cryptolocker.exe
Size

44KB
MD5

6e112763cc73731af334545b72204cb7
SHA1

42461ab4cadb46e7e0e5ff49bd443aa00915baa7
SHA256

bfdebbe5a8186a957b388bb9f6adc834a342aed9c36599373463fb646b40d5a4
SHA512

bde2b7280e9d7e40c39f08a3da63c7dfab3fd6b42880f69dab3dcfc455c203d3a7e69d76e1e48c1c0f2ed0aa874b150bf5e879935f29f6ad9e956891efa0b7f2
SSDEEP

768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6j4AYsqSh+DETkedmhXS6:YGzl5wjRQBBOsP1QMOtEvwDpjl39+D+4

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4884-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4884-25-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4884-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4884-25-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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

Processes:

2024-02-12_6e112763cc73731af334545b72204cb7_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-12_6e112763cc73731af334545b72204cb7_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2960 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2960	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_6e112763cc73731af334545b72204cb7_cryptolocker.exe

description	pid	process	target process
PID 4884 wrote to memory of 2960	4884	2024-02-12_6e112763cc73731af334545b72204cb7_cryptolocker.exe	asih.exe
PID 4884 wrote to memory of 2960	4884	2024-02-12_6e112763cc73731af334545b72204cb7_cryptolocker.exe	asih.exe
PID 4884 wrote to memory of 2960	4884	2024-02-12_6e112763cc73731af334545b72204cb7_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_6e112763cc73731af334545b72204cb7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_6e112763cc73731af334545b72204cb7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4884

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2960

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
44KB

MD5
b06811511dc81ba4c5fce58679e2f441

SHA1
b0723dc90d230e302a275f371ef1e58c90359db8

SHA256
720b2e0e2e68e8f5567274956fa8f0d0b2bda1e724c7c8f7a6e9ce839d8e78c9

SHA512
b81aa3479bc7e1c6ba0ebd7ff7a55e6f493e14098f9c89e9647d386ff7144fb35a8e2c8ac06d5fa5176dad0f1e5855a65c5a5f9659bd0f0d92e463287867f0db

Download Submit
memory/2960-18-0x00000000007E0000-0x00000000007E6000-memory.dmp

Filesize
24KB

Download
memory/2960-19-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4884-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4884-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4884-2-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4884-3-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/4884-25-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download