5bfa6c8d1ee0f2137dbaef9d2c9df17a088aaf7abc3efa4ef077df418b0579c6

Analysis

max time kernel
149s
max time network
154s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
04/04/2024, 22:26

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General

Target

2024-04-04_545c3e1b346ce636a00e86c7af209e0f_cryptolocker.exe
Size

109KB
MD5

545c3e1b346ce636a00e86c7af209e0f
SHA1

c8a3135d4e64a568e17b14049bfcacedb53e85fb
SHA256

5bfa6c8d1ee0f2137dbaef9d2c9df17a088aaf7abc3efa4ef077df418b0579c6
SHA512

3585c7ba43db3591eb2492a0c6ceef561ba15018bea2c5b9c918d29c83bf2a919bb6c186e3f3af71aa9345c3acb1f3bb6a6c0712dd46fc96957e92223e8b749a
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GkszfD:1nK6a+qdOOtEvwDpjX

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2732-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b00000001224c-11.dat	CryptoLocker_rule2
behavioral1/memory/2628-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2732-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2628-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2732-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b00000001224c-11.dat	CryptoLocker_set1
behavioral1/memory/2628-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2732-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2628-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2732-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000b00000001224c-11.dat	UPX
behavioral1/memory/2628-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2732-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2628-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2628	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2732	2024-04-04_545c3e1b346ce636a00e86c7af209e0f_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2732-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000b00000001224c-11.dat	upx
behavioral1/memory/2628-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2732-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2628-27-0x0000000000500000-0x000000000050F311-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 2732 wrote to memory of 2628	2732	2024-04-04_545c3e1b346ce636a00e86c7af209e0f_cryptolocker.exe	28
PID 2732 wrote to memory of 2628	2732	2024-04-04_545c3e1b346ce636a00e86c7af209e0f_cryptolocker.exe	28
PID 2732 wrote to memory of 2628	2732	2024-04-04_545c3e1b346ce636a00e86c7af209e0f_cryptolocker.exe	28
PID 2732 wrote to memory of 2628	2732	2024-04-04_545c3e1b346ce636a00e86c7af209e0f_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-04_545c3e1b346ce636a00e86c7af209e0f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-04_545c3e1b346ce636a00e86c7af209e0f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2732
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2628

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
109KB

MD5
18f7164c670735fba3eb7a1ec91297b3

SHA1
cb14062748f4662ef85d3f1e91eb0702f62d8047

SHA256
da8eeba016ae3d9d9b1807057476006d7c62371fa6ae3d378cfa8f3d426e894e

SHA512
56e94481b38aac81b408a2f9910299452b09313f01713449cb7bcccceca0381d5d4ebc337e4a2fef7c9b95aa950235968710eb5121f267972379dce8f2637ae5

Download Submit
memory/2628-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2628-19-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2628-20-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2628-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2732-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2732-1-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2732-2-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2732-4-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2732-13-0x0000000002800000-0x0000000002810000-memory.dmp

Filesize
64KB

Download
memory/2732-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download