f282f57093d0f28834adb42baa4713bab04d1f99fa22ff58b7fa0bd1ce27f8a1

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
15-04-2024 14:43

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General

Target

2024-04-15_685ab5109faf30b1b8391b9f7eba24e0_cryptolocker.exe
Size

46KB
MD5

685ab5109faf30b1b8391b9f7eba24e0
SHA1

0fe8b782e3ba5f4370b0027ae85c01f36cd60189
SHA256

f282f57093d0f28834adb42baa4713bab04d1f99fa22ff58b7fa0bd1ce27f8a1
SHA512

97822cdc5d9b83240b4b79e7f5875d03f2bf74752f4829d9344518d270f87eeb0baf56e7745629bb6294a7efdc949a58e1a20c57e22d1382ee437ca34daed634
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MobH:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ1

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1728-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000012256-11.dat	CryptoLocker_rule2
behavioral1/memory/1728-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2556-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2556-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral1/memory/1728-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2556-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2556-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1728-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000012256-11.dat	UPX
behavioral1/memory/1728-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2556-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2556-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2556	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1728	2024-04-15_685ab5109faf30b1b8391b9f7eba24e0_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 1728 wrote to memory of 2556	1728	2024-04-15_685ab5109faf30b1b8391b9f7eba24e0_cryptolocker.exe	28
PID 1728 wrote to memory of 2556	1728	2024-04-15_685ab5109faf30b1b8391b9f7eba24e0_cryptolocker.exe	28
PID 1728 wrote to memory of 2556	1728	2024-04-15_685ab5109faf30b1b8391b9f7eba24e0_cryptolocker.exe	28
PID 1728 wrote to memory of 2556	1728	2024-04-15_685ab5109faf30b1b8391b9f7eba24e0_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-15_685ab5109faf30b1b8391b9f7eba24e0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_685ab5109faf30b1b8391b9f7eba24e0_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1728
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2556

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
46KB

MD5
b579c1c44295f576e4514b1eb67fe436

SHA1
e1516044d4ce3ad087d5a720685784ffe12896ea

SHA256
fb7e7ed8db891e1f7f98c31a9726e62cab9621726f81afb0b15f00baaa70f79e

SHA512
3cacdad38d0fada1b3c8be79f6a579ca9b31ad82e25494cc7e018b1d06db547762ea58013a9c44fe41ae6e476c6d31ad9a8fff68730991520fb41c93447de83e

Download Submit
memory/1728-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1728-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1728-2-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1728-3-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1728-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2556-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2556-21-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2556-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download