d527959052d10b5b0b1d3424c023daaa14a714d3959e7286de0c83c8a705ffd9

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
05/04/2024, 11:52

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General

Target

2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe
Size

44KB
MD5

636da7fc96f802082b1abc05c67ebb2e
SHA1

576c3f4e17788230781d3cb1e4517f32fb1fec5b
SHA256

d527959052d10b5b0b1d3424c023daaa14a714d3959e7286de0c83c8a705ffd9
SHA512

69f59199ff94a990b7adcdb5fe17ffd6ea04919db12fd4ff013e4b0b2e8d18dfc8f7cfc3b9948c8b43a93c13add707cff421e8d9d93b6db010de003033353e0c
SSDEEP

768:Kf1K2exg2kBwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZsBGGpebVIYLHA3Kx5:o1KhxqwtdgI2MyzNORQtOflIwoHNV2Xw

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x0008000000012262-10.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral1/files/0x0008000000012262-10.dat	CryptoLocker_set1

Executes dropped EXE 1 IoCs

pid	Process
2700	hurok.exe

Loads dropped DLL 1 IoCs

pid	Process
1440	2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1440	2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe
2700	hurok.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1440 wrote to memory of 2700	1440	2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe	28
PID 1440 wrote to memory of 2700	1440	2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe	28
PID 1440 wrote to memory of 2700	1440	2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe	28
PID 1440 wrote to memory of 2700	1440	2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1440
- C:\Users\Admin\AppData\Local\Temp\hurok.exe
  "C:\Users\Admin\AppData\Local\Temp\hurok.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:2700

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\hurok.exe

Filesize
45KB

MD5
8bb470b348af257a1bc208e90795c454

SHA1
85c962d3e09df9a47c5db17378c4b4fdd32ce26d

SHA256
04a56d69488642c8b880628baa222bbfa82171d519bc06c3fdf153e3c6fb6ac3

SHA512
c21d737e225390c2a51243f3702da1a70f8e29a243eb8bdafaa4573e074d56af4f50f2164745d40bd80b4f8a67d62dc6583b36be73ea74137f2d3b639bc96556

Download Submit
memory/1440-0-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/1440-2-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/1440-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2700-16-0x0000000000230000-0x0000000000236000-memory.dmp

Filesize
24KB

Download