ba43f06baed4281bb97e7d9bc1a7a0ec8c4efc3e0f189b297fd52d9ada8f3807

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
04/05/2024, 03:33

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General

Target

2024-05-04_759ad7e953c6ee287297b1a1ec0dd9f6_cryptolocker.exe
Size

38KB
MD5

759ad7e953c6ee287297b1a1ec0dd9f6
SHA1

1d5cdbe9393d68e1921554a705dce20a0f791b74
SHA256

ba43f06baed4281bb97e7d9bc1a7a0ec8c4efc3e0f189b297fd52d9ada8f3807
SHA512

c4d55e0144f1e62695287bccc75a4576ae068bb4b78b2e737a1ae10ec857063a2f487d16d145a9ac6dfd645ada268ad62d97b2bfa6d61dbe447432f5d89149a9
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan3:qDdFJy3QMOtEvwDpjjWMl7Tdn3

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1928-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x00080000000122cd-11.dat	CryptoLocker_rule2
behavioral1/memory/1928-13-0x0000000000990000-0x00000000009A0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1928-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2092-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1928-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x00080000000122cd-11.dat	CryptoLocker_set1
behavioral1/memory/1928-13-0x0000000000990000-0x00000000009A0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1928-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2092-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1928-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x00080000000122cd-11.dat	UPX
behavioral1/memory/1928-13-0x0000000000990000-0x00000000009A0000-memory.dmp	UPX
behavioral1/memory/1928-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2092-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2092	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1928	2024-05-04_759ad7e953c6ee287297b1a1ec0dd9f6_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1928-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x00080000000122cd-11.dat	upx
behavioral1/memory/1928-13-0x0000000000990000-0x00000000009A0000-memory.dmp	upx
behavioral1/memory/1928-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2092-27-0x0000000000500000-0x0000000000510000-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 1928 wrote to memory of 2092	1928	2024-05-04_759ad7e953c6ee287297b1a1ec0dd9f6_cryptolocker.exe	28
PID 1928 wrote to memory of 2092	1928	2024-05-04_759ad7e953c6ee287297b1a1ec0dd9f6_cryptolocker.exe	28
PID 1928 wrote to memory of 2092	1928	2024-05-04_759ad7e953c6ee287297b1a1ec0dd9f6_cryptolocker.exe	28
PID 1928 wrote to memory of 2092	1928	2024-05-04_759ad7e953c6ee287297b1a1ec0dd9f6_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-04_759ad7e953c6ee287297b1a1ec0dd9f6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-04_759ad7e953c6ee287297b1a1ec0dd9f6_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1928
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2092

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
1d5acb7031957b805df3020d3c3f2d40

SHA1
634384df590329e5c4c28f2cafd38d5a553754e3

SHA256
753d45670c78337cb17ea277922ba4864dad29a07ab0fb2c5a8950c03723f049

SHA512
29b604753ee2a6aef12dc1ab2711f3a201f73c7bb9c784e259d6a29ae33c0c3c2d0969016c74fe1c85b2418c3282f1f0348ccc622acda9650e8f1cdaaa0dc2a1

Download Submit
memory/1928-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1928-2-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/1928-1-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/1928-3-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/1928-13-0x0000000000990000-0x00000000009A0000-memory.dmp

Filesize
64KB

Download
memory/1928-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2092-19-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2092-26-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2092-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download