5f42efc6fcedb45d8a00b0fce488081d8e3cedf758fbc0282fb033fa641824f3

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
28/05/2024, 23:25

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General

Target

2024-05-28_57576ce1a3ec8f60c37f48134fac6992_cryptolocker.exe
Size

24KB
MD5

57576ce1a3ec8f60c37f48134fac6992
SHA1

d4a744d1d7510bbc9eb9bbcd00b56a1f5b30e0a2
SHA256

5f42efc6fcedb45d8a00b0fce488081d8e3cedf758fbc0282fb033fa641824f3
SHA512

06b92e0546b29292c0a0e3072971d43604c9a878c76141557a2b46925d9cadfab07e1893df5473633cc1095880a6c9e855ca419bf0d521a9a3587cb606a79be1
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJ2AB:bVCPwFRo6CpwXFXSqQXfjAsJF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1912-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d00000001449a-11.dat	CryptoLocker_rule2
behavioral1/memory/1912-15-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1248-16-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1248-26-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1912-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/files/0x000d00000001449a-11.dat	UPX
behavioral1/memory/1912-15-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/1248-16-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/1248-26-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1248	hasfj.exe

Loads dropped DLL 1 IoCs

pid	Process
1912	2024-05-28_57576ce1a3ec8f60c37f48134fac6992_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1912-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/files/0x000d00000001449a-11.dat	upx
behavioral1/memory/1912-15-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/1248-16-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/1248-26-0x0000000008000000-0x000000000800E000-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 1912 wrote to memory of 1248	1912	2024-05-28_57576ce1a3ec8f60c37f48134fac6992_cryptolocker.exe	28
PID 1912 wrote to memory of 1248	1912	2024-05-28_57576ce1a3ec8f60c37f48134fac6992_cryptolocker.exe	28
PID 1912 wrote to memory of 1248	1912	2024-05-28_57576ce1a3ec8f60c37f48134fac6992_cryptolocker.exe	28
PID 1912 wrote to memory of 1248	1912	2024-05-28_57576ce1a3ec8f60c37f48134fac6992_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-28_57576ce1a3ec8f60c37f48134fac6992_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-28_57576ce1a3ec8f60c37f48134fac6992_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1912
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:1248

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\hasfj.exe

Filesize
24KB

MD5
d1664a036cbf742155139d9193313b61

SHA1
7cb96a8e83e7c91fcee7de0b1a36a399aa3db622

SHA256
a7222be8a5329f9d4fbc08cd83f4e74e48789f5e4044066db5dae2883013bbea

SHA512
becbf96ed97e7903585e7123c75b83897b5b83c5bc0343a17c96756220384cca6394fbc3c67f737096174f15fd2303876979891f58f468ee95eb0ac0dcb9b8ad

Download Submit
memory/1248-16-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1248-18-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/1248-25-0x00000000002A0000-0x00000000002A6000-memory.dmp

Filesize
24KB

Download
memory/1248-26-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1912-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1912-2-0x00000000003D0000-0x00000000003D6000-memory.dmp

Filesize
24KB

Download
memory/1912-1-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/1912-9-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/1912-15-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download