da7b0113d386a467bfbe2f6c32a29de9b6ed091d0c505d567a2c3634d45f1a35

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
05/05/2024, 15:50

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General

Target

2024-05-05_58b6b7815e797321bafd69e1a0628462_cryptolocker.exe
Size

38KB
MD5

58b6b7815e797321bafd69e1a0628462
SHA1

7963c0bba072daa72b5e9c0a116d216957df67b3
SHA256

da7b0113d386a467bfbe2f6c32a29de9b6ed091d0c505d567a2c3634d45f1a35
SHA512

dfe6a0599a597e84129e9a0e525bbd1c5810193e593ae594d783509752a2f8b4709beaed68da50424e190a57b1b9cb584ff8b8b3f3f2915668e22ba7f7aaef62
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/s:qDdFJy3QMOtEvwDpjjWMl7TR

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1784-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c00000001313a-11.dat	CryptoLocker_rule2
behavioral1/memory/1784-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1784-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2744-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1784-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c00000001313a-11.dat	CryptoLocker_set1
behavioral1/memory/1784-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1784-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2744-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1784-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c00000001313a-11.dat	UPX
behavioral1/memory/1784-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp	UPX
behavioral1/memory/1784-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2744-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2744	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1784	2024-05-05_58b6b7815e797321bafd69e1a0628462_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1784-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000c00000001313a-11.dat	upx
behavioral1/memory/1784-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp	upx
behavioral1/memory/1784-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2744-26-0x0000000000500000-0x0000000000510000-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 1784 wrote to memory of 2744	1784	2024-05-05_58b6b7815e797321bafd69e1a0628462_cryptolocker.exe	28
PID 1784 wrote to memory of 2744	1784	2024-05-05_58b6b7815e797321bafd69e1a0628462_cryptolocker.exe	28
PID 1784 wrote to memory of 2744	1784	2024-05-05_58b6b7815e797321bafd69e1a0628462_cryptolocker.exe	28
PID 1784 wrote to memory of 2744	1784	2024-05-05_58b6b7815e797321bafd69e1a0628462_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-05_58b6b7815e797321bafd69e1a0628462_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-05_58b6b7815e797321bafd69e1a0628462_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1784
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2744

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
38KB

MD5
0725b755ea070ef918e61c46341dc5a5

SHA1
e382fc45ddd5329d037c9ce94a0bb1c5b6ba51af

SHA256
427fe42ee4bc4b59d7040fd096f7fd5cab6e71f5f34015253d82a11f011a07d0

SHA512
bfc7bfb14e3d62868a52667a05e8c4486fd79e5393b1a2c62ae4edc24c0926584081953c305c75d7bda16592779b20187434800e54fe4311d6b41f62d12d5a01

Download Submit
memory/1784-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1784-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1784-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1784-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1784-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp

Filesize
64KB

Download
memory/1784-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2744-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download