b5bfc2475234d3b05ffc63c52ece64e381edae5baab02eb96d5e57829926a8c3

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
04-05-2024 04:23

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General

Target

2024-05-04_04ea38d29dcf472b2cdf7e47ce477af8_cryptolocker.exe
Size

63KB
MD5

04ea38d29dcf472b2cdf7e47ce477af8
SHA1

1634b1242089e6da42c10da45443e2ce8a29d269
SHA256

b5bfc2475234d3b05ffc63c52ece64e381edae5baab02eb96d5e57829926a8c3
SHA512

bebe7b8db8451b7b6cd0abd3d0cd7f2a3a98cf0c3d93eb115313185c2beaac3d52e702386e13364027c371281c74beac738462a9c2116a46a40be43347dc5cca
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsi+:BbdDmjr+OtEvwDpjM8L

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2184-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x00090000000141e6-11.dat	CryptoLocker_rule2
behavioral1/memory/2184-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1852-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral1/memory/2184-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1852-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2184-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x00090000000141e6-11.dat	UPX
behavioral1/memory/2184-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1852-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1852	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2184	2024-05-04_04ea38d29dcf472b2cdf7e47ce477af8_cryptolocker.exe

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 2184 wrote to memory of 1852	2184	2024-05-04_04ea38d29dcf472b2cdf7e47ce477af8_cryptolocker.exe	28
PID 2184 wrote to memory of 1852	2184	2024-05-04_04ea38d29dcf472b2cdf7e47ce477af8_cryptolocker.exe	28
PID 2184 wrote to memory of 1852	2184	2024-05-04_04ea38d29dcf472b2cdf7e47ce477af8_cryptolocker.exe	28
PID 2184 wrote to memory of 1852	2184	2024-05-04_04ea38d29dcf472b2cdf7e47ce477af8_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-04_04ea38d29dcf472b2cdf7e47ce477af8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-04_04ea38d29dcf472b2cdf7e47ce477af8_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2184
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1852

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
64KB

MD5
3ab1e0923cdcd2236a1e618ed1b79e86

SHA1
29fac825f4d5c55af41a9157359d71a83bcdbdec

SHA256
7070c083dcffff62b416e7ec77fb6a98bd46c49e8b55ae23338da3e095197a10

SHA512
7fe92a1beab7549c4ec5cfbd76a4bcf18d72a9ae22316aa3d5470f016a0ec7f1041bcbc39d48b8531b67018cbeac777ccf27f25cb5a5500d044ba21aef58a845

Download Submit
memory/1852-18-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1852-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2184-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2184-2-0x00000000003A0000-0x00000000003A6000-memory.dmp

Filesize
24KB

Download
memory/2184-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2184-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2184-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download