3a0808cc4350d94bf2f8be14ec4639ea64635af171ec650e6839fceb44780085

Analysis

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

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
02/02/2024, 02:40

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General

Target

2024-02-02_db38518b258229325782b2050162ab76_cryptolocker.exe
Size

55KB
MD5

db38518b258229325782b2050162ab76
SHA1

a2eef1e98fca6139a059c5bf3c865aff47601ea3
SHA256

3a0808cc4350d94bf2f8be14ec4639ea64635af171ec650e6839fceb44780085
SHA512

8cf20066d390c493c10d30b65924c31ae090991ee0d47bb7cca29257db5800e9af8b8f5baa03513b766a6b0f8f834ed389db51204d1db5f4ed8ca6d203d84c49
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5ax84uf:z6QFElP6n+gKmddpMOtEvwDpj9aYaO

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2184-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0009000000014120-11.dat	CryptoLocker_rule2
behavioral1/memory/2184-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1852-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1852-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2184-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0009000000014120-11.dat	CryptoLocker_set1
behavioral1/memory/2184-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1852-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1852-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2184-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x0009000000014120-11.dat	UPX
behavioral1/memory/2184-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1852-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1852-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1852	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2184	2024-02-02_db38518b258229325782b2050162ab76_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2184-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x0009000000014120-11.dat	upx
behavioral1/memory/2184-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1852-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1852-26-0x0000000000500000-0x0000000000510000-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 2184 wrote to memory of 1852	2184	2024-02-02_db38518b258229325782b2050162ab76_cryptolocker.exe	28
PID 2184 wrote to memory of 1852	2184	2024-02-02_db38518b258229325782b2050162ab76_cryptolocker.exe	28
PID 2184 wrote to memory of 1852	2184	2024-02-02_db38518b258229325782b2050162ab76_cryptolocker.exe	28
PID 2184 wrote to memory of 1852	2184	2024-02-02_db38518b258229325782b2050162ab76_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-02_db38518b258229325782b2050162ab76_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-02_db38518b258229325782b2050162ab76_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
55KB

MD5
2852ba609d42df29d5601f9071dd13fe

SHA1
4c9490e28f2f7201b4e10996d6008071fe9a1ee5

SHA256
42d2a9d3c1463ae1f7ac21b7b2124ab370a904b487dc9d9e872de73f867d6733

SHA512
bb6e5adfd85632209591bd79bd2f066db4bbaca58e9ab38cb6970cf665d34b661afd359436a76f8633921f0fded381fa9a021994ba2ed16c0866c4b7644e8b11

Download Submit
memory/1852-18-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/1852-20-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1852-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1852-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

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

Filesize
64KB

Download
memory/2184-1-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2184-3-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2184-2-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

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

Filesize
64KB

Download