84f8fcac1bd7bcc621212da92b292406a319d414ba0535772919d27af3aafc74

Analysis

max time kernel
149s
max time network
154s
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 17:49

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General

Target

2024-02-12_c2e3370ed27df8681c546e7c3b4258b6_cryptolocker.exe
Size

116KB
MD5

c2e3370ed27df8681c546e7c3b4258b6
SHA1

59598e28c02efc2d58d494719d722d2c3e9010f8
SHA256

84f8fcac1bd7bcc621212da92b292406a319d414ba0535772919d27af3aafc74
SHA512

c88e79965f3d3e60463f66ecaa6f21942b85fad17112456980f3af38920c28ce7a8f1c090c7b78e2ccdfca7f437b592818593fd94279f5ffea8d2864532684f9
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01PV7:z6a+CdOOtEvwDpjczL

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3260-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4948-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3260-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4948-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3260-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4948-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3260-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4948-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3260-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4948-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3260-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4948-27-0x0000000000500000-0x0000000000510000-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_c2e3370ed27df8681c546e7c3b4258b6_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	2024-02-12_c2e3370ed27df8681c546e7c3b4258b6_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4948 asih.exe

pid	process
4948	asih.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/3260-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4948-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3260-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4948-27-0x0000000000500000-0x0000000000510000-memory.dmp	upx

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

Processes:

2024-02-12_c2e3370ed27df8681c546e7c3b4258b6_cryptolocker.exe

description	pid	process	target process
PID 3260 wrote to memory of 4948	3260	2024-02-12_c2e3370ed27df8681c546e7c3b4258b6_cryptolocker.exe	asih.exe
PID 3260 wrote to memory of 4948	3260	2024-02-12_c2e3370ed27df8681c546e7c3b4258b6_cryptolocker.exe	asih.exe
PID 3260 wrote to memory of 4948	3260	2024-02-12_c2e3370ed27df8681c546e7c3b4258b6_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_c2e3370ed27df8681c546e7c3b4258b6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_c2e3370ed27df8681c546e7c3b4258b6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3260

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4948

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
116KB

MD5
95369cc7d8222817cbee7104f4e6ada9

SHA1
9a118d1ebdfc6e2d7a9b5beb39c1dcb2e3a066e3

SHA256
3180bcc9da69f630f43ad5551a6c4cef3aa3b5fbb697748f920f7716d2b5f4f1

SHA512
fe132e555eb0b3ef4732f7387731877534115a40ff2a74bff09aa9e1f1af27840d50c7b59c1a1361a76e9ce872bee340e6775ff087662170ec92c64942f4b75b

Download Submit
memory/3260-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3260-1-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/3260-3-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/3260-2-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/3260-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4948-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4948-20-0x0000000000680000-0x0000000000686000-memory.dmp

Filesize
24KB

Download
memory/4948-22-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4948-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download