f3781a2ebe65278cc5219919f3179dfe9504ee9d61a2fb6461649f0b138200e4

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-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 5 IoCs

resource	yara_rule
behavioral1/memory/1940-8-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000013a3f-11.dat	CryptoLocker_rule2
behavioral1/memory/1940-13-0x00000000006E0000-0x00000000006F0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2988-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2988-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1940-8-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000013a3f-11.dat	CryptoLocker_set1
behavioral1/memory/1940-13-0x00000000006E0000-0x00000000006F0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2988-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2988-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1940-8-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000b000000013a3f-11.dat	UPX
behavioral1/memory/1940-13-0x00000000006E0000-0x00000000006F0000-memory.dmp	UPX
behavioral1/memory/2988-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2988-25-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2988	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1940	2024-06-05_8016d385caed0855d4094203843d0dee_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1940-8-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000b000000013a3f-11.dat	upx
behavioral1/memory/1940-13-0x00000000006E0000-0x00000000006F0000-memory.dmp	upx
behavioral1/memory/2988-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2988-25-0x0000000000500000-0x000000000050F311-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 4 IoCs

description	pid	Process	procid_target
PID 1940 wrote to memory of 2988	1940	2024-06-05_8016d385caed0855d4094203843d0dee_cryptolocker.exe	28
PID 1940 wrote to memory of 2988	1940	2024-06-05_8016d385caed0855d4094203843d0dee_cryptolocker.exe	28
PID 1940 wrote to memory of 2988	1940	2024-06-05_8016d385caed0855d4094203843d0dee_cryptolocker.exe	28
PID 1940 wrote to memory of 2988	1940	2024-06-05_8016d385caed0855d4094203843d0dee_cryptolocker.exe	28

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⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1940
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2988

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
75KB

MD5
546657615109217f89887d5057293e9c

SHA1
226288c294fa2355dc8aa3855a606dc6a6f3ca25

SHA256
81b21cc90709590ae9a6c33a528cf4ee7af0c917f7b7c6a40ce840edf93f274c

SHA512
85239cd7bc6d6bf5178ac2e25bf8bd9ced8cf725c1e2d91dccc14d895257f4516b30624abfe2c6149ad06f51742e07cdc88658d1b7071be5d227e591823e7eda

Download Submit
memory/1940-1-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/1940-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1940-8-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1940-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1940-13-0x00000000006E0000-0x00000000006F0000-memory.dmp

Filesize
64KB

Download
memory/2988-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2988-18-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2988-25-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download