5fa9f0b2817cd7cbb7c8e2f73c1c26eb4267a004a1d394e52defb1a15b68b086

Analysis

max time kernel
148s
max time network
150s
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 02:28

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General

Target

2024-05-23_432555650bff65ebdddf98bd61355549_cryptolocker.exe
Size

78KB
MD5

432555650bff65ebdddf98bd61355549
SHA1

8fccf408ac99e38887dbe6d402eba588ee8b83d5
SHA256

5fa9f0b2817cd7cbb7c8e2f73c1c26eb4267a004a1d394e52defb1a15b68b086
SHA512

f23145857920fa41ba5b2781f267db6dad5d4ef6bfc68482c9ee4f3d065a27b13be6878b465dbe25c50ddf759cb4c4cf29271748f296a5de4f642f14e4108004
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1Z:T6a+rdOOtEvwDpjNtHPO

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4632-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4632-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5056-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5056-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4632-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4632-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5056-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5056-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4632-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4632-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5056-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5056-27-0x0000000000500000-0x0000000000510000-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:

2024-05-23_432555650bff65ebdddf98bd61355549_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-23_432555650bff65ebdddf98bd61355549_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

5056 asih.exe

pid	process
5056	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4632-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4632-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5056-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5056-27-0x0000000000500000-0x0000000000510000-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:

2024-05-23_432555650bff65ebdddf98bd61355549_cryptolocker.exe

description	pid	process	target process
PID 4632 wrote to memory of 5056	4632	2024-05-23_432555650bff65ebdddf98bd61355549_cryptolocker.exe	asih.exe
PID 4632 wrote to memory of 5056	4632	2024-05-23_432555650bff65ebdddf98bd61355549_cryptolocker.exe	asih.exe
PID 4632 wrote to memory of 5056	4632	2024-05-23_432555650bff65ebdddf98bd61355549_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_432555650bff65ebdddf98bd61355549_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_432555650bff65ebdddf98bd61355549_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4632
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5056

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
78KB

MD5
0c815625de7169459f446445b5890c1b

SHA1
b30e697eaf4cd1ae82e8191338c12209873be598

SHA256
68c705839de899906cdbcae7a1cf31406ad9c4015ffb1f935203e8ff12eff9bd

SHA512
19011e9b9d1f4a53c6e5cbfb3d80d4e9a372cd4d0456258c783647690322a97094044bdf5d173a1e1837c42474d53948dfe8fa075910fab32b7f941e665c5ca6

Download Submit
memory/4632-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4632-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/4632-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4632-9-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/4632-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5056-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5056-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5056-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5056-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download