fa704c9bada6d3e06ce81c0cbe510dd1f3fece3fc86ef101e96b103da7aaf303

Analysis

max time kernel
148s
max time network
150s
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 18:30

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General

Target

2024-02-12_d6aff43dc4232ab2ae38f02936923527_cryptolocker.exe
Size

63KB
MD5

d6aff43dc4232ab2ae38f02936923527
SHA1

bf4d6d100037114e70b6f9b2657b297ad2ece4dc
SHA256

fa704c9bada6d3e06ce81c0cbe510dd1f3fece3fc86ef101e96b103da7aaf303
SHA512

53149379753dbbcd8cc170ce2b250e122bfb243070a6890a43c9f066b95d5e241c2dbabf11be62cf3da5f359e53eecbcc174c454c3197bc8b8519afae560e819
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYhP+K:1nK6a+qdOOtEvwDpjs

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4020-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4020-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1788-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4020-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4020-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/1788-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4020-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4020-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/1788-26-0x0000000000500000-0x000000000050F311-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_d6aff43dc4232ab2ae38f02936923527_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	2024-02-12_d6aff43dc4232ab2ae38f02936923527_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1788 asih.exe

pid	process
1788	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4020-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4020-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/1788-26-0x0000000000500000-0x000000000050F311-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_d6aff43dc4232ab2ae38f02936923527_cryptolocker.exe

description	pid	process	target process
PID 4020 wrote to memory of 1788	4020	2024-02-12_d6aff43dc4232ab2ae38f02936923527_cryptolocker.exe	asih.exe
PID 4020 wrote to memory of 1788	4020	2024-02-12_d6aff43dc4232ab2ae38f02936923527_cryptolocker.exe	asih.exe
PID 4020 wrote to memory of 1788	4020	2024-02-12_d6aff43dc4232ab2ae38f02936923527_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_d6aff43dc4232ab2ae38f02936923527_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_d6aff43dc4232ab2ae38f02936923527_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4020

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1788

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
63KB

MD5
b62031a0d3d3faee3fd624fbda53d687

SHA1
34941a8f85123e6bb050ce1d63a25b98c130315c

SHA256
d5df2aa494948e916ea23b360400c4e70cc2bad8aadaf965f0d93a9d008f4506

SHA512
6db38d779619973384dff845fd0993d2e93f281ce67bef5b085aee64a0a82295ca76670c13b15dd781b9a4c87cb825348fd4b3329712e1ec8aeb25286777ee1c

Download Submit
memory/1788-19-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/1788-23-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1788-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4020-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4020-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4020-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4020-3-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/4020-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download