a19d52b709549e10e691aa504bf0733fa9050ffdb29e0422b4d052117d684575

Analysis

max time kernel
150s
max time network
149s
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 20:05

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General

Target

2024-02-12_8052f5c219137ede2d6a1d7e64d93247_cryptolocker.exe
Size

56KB
MD5

8052f5c219137ede2d6a1d7e64d93247
SHA1

7c509719c2b2e6c23b767a61897fa40dcb6ce80a
SHA256

a19d52b709549e10e691aa504bf0733fa9050ffdb29e0422b4d052117d684575
SHA512

918281fd590cbedb93c9a62fef7f1c3c13c42c9268aa809226d2b5bc6d281c7d6a587f591d6ae38b6a776d333743cd9492dd04c106e118c317352c2d14c67b17
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61q:BbdDmjr+OtEvwDpjM4

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3452-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3452-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2380-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3452-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2380-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3452-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3452-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2380-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-02-12_8052f5c219137ede2d6a1d7e64d93247_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	2024-02-12_8052f5c219137ede2d6a1d7e64d93247_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2380 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2380	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_8052f5c219137ede2d6a1d7e64d93247_cryptolocker.exe

description	pid	process	target process
PID 3452 wrote to memory of 2380	3452	2024-02-12_8052f5c219137ede2d6a1d7e64d93247_cryptolocker.exe	asih.exe
PID 3452 wrote to memory of 2380	3452	2024-02-12_8052f5c219137ede2d6a1d7e64d93247_cryptolocker.exe	asih.exe
PID 3452 wrote to memory of 2380	3452	2024-02-12_8052f5c219137ede2d6a1d7e64d93247_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_8052f5c219137ede2d6a1d7e64d93247_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_8052f5c219137ede2d6a1d7e64d93247_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3452

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2380

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
56KB

MD5
be73eaa5e413c1b2d4ab1dec0dc63fb0

SHA1
8b17762d2f5aae6cb409045b7c2ad8f29e49ebbe

SHA256
503f3421ae24ada63b56a6fea7be469ff3ea5acbc5dae9850d6b9d50860bdbd7

SHA512
75d06602c7e036b46fe631dd73659e66cea85673a07c487f113396b031a0211d259fbb1a6833124de096cecfb08fabfdb459e62e03f5a8877848276c00427142

Download Submit
memory/2380-19-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

Filesize
24KB

Download
memory/2380-21-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/2380-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3452-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3452-1-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/3452-3-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/3452-2-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/3452-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download