2fcb16d44e372e5237d1f1f3f694a1933a1c35051702f665b9bcf087f1c17107

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
22/04/2024, 09:14

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General

Target

2024-04-22_f73d1e5040b268b099812317b7ab99a3_cryptolocker.exe
Size

79KB
MD5

f73d1e5040b268b099812317b7ab99a3
SHA1

7a4fe71feb606352bf309d73b43a7517b6f1f596
SHA256

2fcb16d44e372e5237d1f1f3f694a1933a1c35051702f665b9bcf087f1c17107
SHA512

16f9304d36d8258ea7b0e1f1cdcbe01574c8af927bc9c9b1e84e288ee83c18bcf18b44144f7031c6509b0c81c93148130a7cdba493a0ac0161e194c98c71217c
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOA+YSafiPuqH:T6a+rdOOtEvwDpjNcc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2928-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b00000001224f-14.dat	CryptoLocker_rule2
behavioral1/memory/2928-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2852-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2852-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2928-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b00000001224f-14.dat	CryptoLocker_set1
behavioral1/memory/2928-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2852-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2852-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2928-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b00000001224f-14.dat	UPX
behavioral1/memory/2928-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2852-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2852-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2852	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2928	2024-04-22_f73d1e5040b268b099812317b7ab99a3_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2928-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b00000001224f-14.dat	upx
behavioral1/memory/2928-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2852-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2852-26-0x0000000000500000-0x0000000000510000-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 4 IoCs

description	pid	Process	procid_target
PID 2928 wrote to memory of 2852	2928	2024-04-22_f73d1e5040b268b099812317b7ab99a3_cryptolocker.exe	28
PID 2928 wrote to memory of 2852	2928	2024-04-22_f73d1e5040b268b099812317b7ab99a3_cryptolocker.exe	28
PID 2928 wrote to memory of 2852	2928	2024-04-22_f73d1e5040b268b099812317b7ab99a3_cryptolocker.exe	28
PID 2928 wrote to memory of 2852	2928	2024-04-22_f73d1e5040b268b099812317b7ab99a3_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-22_f73d1e5040b268b099812317b7ab99a3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-22_f73d1e5040b268b099812317b7ab99a3_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2928
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2852

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

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

Filesize
79KB

MD5
56688b85e74322993a6f845aeb0852fe

SHA1
b5756884d15a149d0fe64c094a8e0fe617a36217

SHA256
428d88d20a68fb54e0df57a5a0410103f8b60dd545fa44b6e0d9f70959c8ee0e

SHA512
b4be7dac401e7bea52f3b6a58bc306363e522ea82e5762122812d4d6d3071c5be856075afeaa96b115c34a9d771dabcafa3e1c99cdd701c77adc74b0b301a624

Download Submit
memory/2852-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2852-18-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2852-19-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2852-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2928-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2928-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2928-2-0x0000000001CA0000-0x0000000001CA6000-memory.dmp

Filesize
24KB

Download
memory/2928-3-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2928-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download