429f0990c4883fbb1708972402617fca272c90a20fa6294490f6b43501711ea8

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23/02/2024, 10:53

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General

Target

2024-02-23_8a1ea16fa6b2bfa3b5b822b7c088aca4_cryptolocker.exe
Size

62KB
MD5

8a1ea16fa6b2bfa3b5b822b7c088aca4
SHA1

2c73bf04689b8ea9059438c35a0e9af4320c2700
SHA256

429f0990c4883fbb1708972402617fca272c90a20fa6294490f6b43501711ea8
SHA512

30fc9101cd8f820099aadd0e99be78c8463606e0947343049fb4a2390fc676b2ab3bcf19266bbe94aae2f505d27ca6123dc00c0a73f03da1b731d5394d20dca8
SSDEEP

768:T6LsoEEeegiZPvEhHSG+gkum/kLyMro2GtOOtEvwDpjhXMLamkc8J5S9UEp:T6QFElP6n+gxmddpMOtEvwDpjwa38L

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2204-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2204-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a0000000142b5-11.dat	CryptoLocker_rule2
behavioral1/memory/2992-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2992-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2204-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2204-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a0000000142b5-11.dat	CryptoLocker_set1
behavioral1/memory/2992-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2992-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2204-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2204-14-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000a0000000142b5-11.dat	UPX
behavioral1/memory/2992-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2992-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2992	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2204	2024-02-23_8a1ea16fa6b2bfa3b5b822b7c088aca4_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2204-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2204-14-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000a0000000142b5-11.dat	upx
behavioral1/memory/2992-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2992-26-0x0000000000500000-0x0000000000510000-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 2204 wrote to memory of 2992	2204	2024-02-23_8a1ea16fa6b2bfa3b5b822b7c088aca4_cryptolocker.exe	28
PID 2204 wrote to memory of 2992	2204	2024-02-23_8a1ea16fa6b2bfa3b5b822b7c088aca4_cryptolocker.exe	28
PID 2204 wrote to memory of 2992	2204	2024-02-23_8a1ea16fa6b2bfa3b5b822b7c088aca4_cryptolocker.exe	28
PID 2204 wrote to memory of 2992	2204	2024-02-23_8a1ea16fa6b2bfa3b5b822b7c088aca4_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-23_8a1ea16fa6b2bfa3b5b822b7c088aca4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_8a1ea16fa6b2bfa3b5b822b7c088aca4_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2992

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
62KB

MD5
5691df62e4c80af3ae1f938c31c6e064

SHA1
a840ab6f59130c55ccf82ad657d75d09f6242a9d

SHA256
11aa7b08332fbcf1f3d152be399d123095b608b82a10be79cf134d1b4e4d1ebf

SHA512
016f73efea143aa05bf9b4e91adb08102ee1ad94b7be24077b5e9a6dfa747aa7d99da322cb4037495cbd756a2193a10eda611bcdf7f51f832ffd7547b01b5463

Download Submit
memory/2204-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2204-1-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2204-2-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2204-3-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2204-14-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2992-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2992-18-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/2992-20-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2992-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download