43fff992c887b335fa45223ea47aa37d58acb0314ff1ffa2586c21989cbbdfe8

Analysis

max time kernel
148s
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
10/04/2024, 22:33

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General

Target

2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe
Size

99KB
MD5

c2ecd339d6dfdfebce9117cf2ccb76b4
SHA1

08c88307ecc5c82a8b6bb0b1d21aa7f72f7b26f7
SHA256

43fff992c887b335fa45223ea47aa37d58acb0314ff1ffa2586c21989cbbdfe8
SHA512

8d6b77a4225532afeec60e467be14605b5586eba54d18fed227bf7484da0a7021c071bf5ebb2b7e328ebf5a6a6f5b62eee549746c6f0486fe125560b5b07f491
SSDEEP

1536:26QFElP6n+gBQMOtEvwDpjQGYQbN/PKwNCWwh:26a+2OtEvwDpjtzm

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00080000000231f7-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x00080000000231f7-12.dat	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
636	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 3788 wrote to memory of 636	3788	2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe	83
PID 3788 wrote to memory of 636	3788	2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe	83
PID 3788 wrote to memory of 636	3788	2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3788
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:636

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
100KB

MD5
63e90af4a8dca401fa876eb88dc6271a

SHA1
e02079130cd6e52b535ca3c7d0414e2675666ca5

SHA256
4a85b4e1fa2a7a82ce4ed0bab1dce512bd723d66234cde7320c5383ab13f24c1

SHA512
724f8e34ad1bdcf2dcf941d00257869affbf5ad3d5f2b0cfd9e69e23ebf63b65469f8024c564abb5403c0ea046d56d2a52723d1a5d75c1b67fcff6fcd5446e4b

Download Submit
memory/636-17-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/636-20-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3788-0-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3788-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3788-2-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download