4abefca220a5eafc65e39a3b3e7ddfb0211177c7cd618c1a5996e1e4983db161

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 02:22

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General

Target

2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe
Size

78KB
MD5

01531e7bd4fedebfe831ab2ba708d5ee
SHA1

16dd0b24012b7e198ca96ba577d0745ad924e8e9
SHA256

4abefca220a5eafc65e39a3b3e7ddfb0211177c7cd618c1a5996e1e4983db161
SHA512

24a4451ea125140d9e7c1031e79c021ad1f0f16594751cd89b4b1671f7afc23d70d926575a96a24693f3b8bd98aba84194e0834edb5fc2c90121d509f18eff70
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1FN:T6a+rdOOtEvwDpjNtHPc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1488-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1488-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2948-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1488-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1488-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2948-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1488-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1488-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2948-26-0x0000000000500000-0x0000000000510000-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:

2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2948 asih.exe

pid	process
2948	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1488-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1488-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2948-26-0x0000000000500000-0x0000000000510000-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:

2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe

description	pid	process	target process
PID 1488 wrote to memory of 2948	1488	2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe	asih.exe
PID 1488 wrote to memory of 2948	1488	2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe	asih.exe
PID 1488 wrote to memory of 2948	1488	2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1488

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2948

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
78KB

MD5
301cbfdb64f23acd68f5c0e548d8b8ba

SHA1
82b175bbeb2f17568e50a6f879ce0b0728e99b13

SHA256
8c4cdf00be031824fcf7e59f5fcf568bf60bf84c865f1ed0bad1f4cbe8086f98

SHA512
fb7c2cfaf3ac41335d77642b895cf165cda800f54dac416fc3e1c0dcd53bcd5944aeeb43c948ac51f39a51a535567f4900742d3fcc0bc84c3ae3acd2341a9e9c

Download Submit
memory/1488-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1488-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1488-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1488-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1488-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2948-19-0x0000000000680000-0x0000000000686000-memory.dmp

Filesize
24KB

Download
memory/2948-25-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/2948-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download