f3781a2ebe65278cc5219919f3179dfe9504ee9d61a2fb6461649f0b138200e4

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
05/06/2024, 19:48

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General

Target

2024-06-05_8016d385caed0855d4094203843d0dee_cryptolocker.exe
Size

75KB
MD5

8016d385caed0855d4094203843d0dee
SHA1

69310eede914879a3d7cd18763fe4375b71549ca
SHA256

f3781a2ebe65278cc5219919f3179dfe9504ee9d61a2fb6461649f0b138200e4
SHA512

a714320ec3fd7af117e93cb27918efe1ddd9315a78ee9650a69fc912d4a180f35c722ee6ab2f112098cb9a9a293c3e7b637ebc247d342b0824c10d8704509b3f
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal81Gs:1nK6a+qdOOtEvwDpjZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3352-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00060000000232a6-13.dat	CryptoLocker_rule2
behavioral2/memory/3352-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1480-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3352-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00060000000232a6-13.dat	CryptoLocker_set1
behavioral2/memory/3352-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/1480-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3352-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x00060000000232a6-13.dat	UPX
behavioral2/memory/3352-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/1480-26-0x0000000000500000-0x000000000050F311-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	2024-06-05_8016d385caed0855d4094203843d0dee_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1480	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3352-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x00060000000232a6-13.dat	upx
behavioral2/memory/3352-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/1480-26-0x0000000000500000-0x000000000050F311-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

description	pid	Process	procid_target
PID 3352 wrote to memory of 1480	3352	2024-06-05_8016d385caed0855d4094203843d0dee_cryptolocker.exe	83
PID 3352 wrote to memory of 1480	3352	2024-06-05_8016d385caed0855d4094203843d0dee_cryptolocker.exe	83
PID 3352 wrote to memory of 1480	3352	2024-06-05_8016d385caed0855d4094203843d0dee_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-05_8016d385caed0855d4094203843d0dee_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-05_8016d385caed0855d4094203843d0dee_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3352
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1480

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
75KB

MD5
546657615109217f89887d5057293e9c

SHA1
226288c294fa2355dc8aa3855a606dc6a6f3ca25

SHA256
81b21cc90709590ae9a6c33a528cf4ee7af0c917f7b7c6a40ce840edf93f274c

SHA512
85239cd7bc6d6bf5178ac2e25bf8bd9ced8cf725c1e2d91dccc14d895257f4516b30624abfe2c6149ad06f51742e07cdc88658d1b7071be5d227e591823e7eda

Download Submit
memory/1480-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/1480-25-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/1480-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3352-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3352-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/3352-2-0x0000000000860000-0x0000000000866000-memory.dmp

Filesize
24KB

Download
memory/3352-9-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/3352-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download