7c177f41ac485f63c982118299962368035bcea0039857dac90e01981dcd571e

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
25/05/2024, 04:39

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General

Target

2024-05-25_c4ac25331334dc8a25ec6c41e71d81ab_cryptolocker.exe
Size

53KB
MD5

c4ac25331334dc8a25ec6c41e71d81ab
SHA1

dbfcb01ff5bb212d5533443494d3c1188c231c1a
SHA256

7c177f41ac485f63c982118299962368035bcea0039857dac90e01981dcd571e
SHA512

c063a9162f0e19e88fe0e7a1e49db554247dab5c3443bca20d2516bbff796e245dbf588e350a2b1514a494f9c65f531002cf3b595d52656bae8fd0938e63d1cd
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOX6:bODOw9acifAoc+vt

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1708-1-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000e000000015a98-11.dat	CryptoLocker_rule2
behavioral1/memory/1708-15-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3012-16-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3012-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1708-1-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/files/0x000e000000015a98-11.dat	UPX
behavioral1/memory/1708-15-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/3012-16-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/3012-26-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3012	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
1708	2024-05-25_c4ac25331334dc8a25ec6c41e71d81ab_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1708-1-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/files/0x000e000000015a98-11.dat	upx
behavioral1/memory/1708-15-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/3012-16-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/3012-26-0x0000000008000000-0x000000000800F000-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 1708 wrote to memory of 3012	1708	2024-05-25_c4ac25331334dc8a25ec6c41e71d81ab_cryptolocker.exe	28
PID 1708 wrote to memory of 3012	1708	2024-05-25_c4ac25331334dc8a25ec6c41e71d81ab_cryptolocker.exe	28
PID 1708 wrote to memory of 3012	1708	2024-05-25_c4ac25331334dc8a25ec6c41e71d81ab_cryptolocker.exe	28
PID 1708 wrote to memory of 3012	1708	2024-05-25_c4ac25331334dc8a25ec6c41e71d81ab_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-25_c4ac25331334dc8a25ec6c41e71d81ab_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_c4ac25331334dc8a25ec6c41e71d81ab_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1708
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3012

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\lossy.exe

Filesize
53KB

MD5
637651abc2926a6498e7a0ca07283c11

SHA1
75d625bc95c9e0aab84e45814c219c3cfddf93aa

SHA256
187f81c878d06be38ed0416499dbeb0da7191dacde63191e07fb84f04df1402f

SHA512
bc5bc89c36820b705fe4ea5e38941b85a4eb57840e3c87ec49107f1a344be36a6bc1dc2c6ed1fc5120cc8602688c5f7285fc83ed42ac605cd3086031f6ae28fa

Download Submit
memory/1708-1-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/1708-0-0x0000000001B70000-0x0000000001B76000-memory.dmp

Filesize
24KB

Download
memory/1708-2-0x0000000001BA0000-0x0000000001BA6000-memory.dmp

Filesize
24KB

Download
memory/1708-9-0x0000000001B70000-0x0000000001B76000-memory.dmp

Filesize
24KB

Download
memory/1708-15-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3012-16-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3012-19-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/3012-18-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3012-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download