7b2879e675064e8dd0c91ad43788f2adff47f1d621fbb734ba5cf1033ddb6cf1

General

Target

2024-03-28_762a0f89409ec40d245daf8f0ffb4bff_cryptolocker.exe
Size

106KB
MD5

762a0f89409ec40d245daf8f0ffb4bff
SHA1

b6a15f5dd4dcd3e899858cdb4dab792c26c70caf
SHA256

7b2879e675064e8dd0c91ad43788f2adff47f1d621fbb734ba5cf1033ddb6cf1
SHA512

d79a27c67a37d36c005520886ca8b75e1bd38371e8a99845ee34c7cf975eb26adaccc263f6ff707edcef94c42f3c8614ca6e3c913b87621ee8180f646890fca2
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GksaLaC:1nK6a+qdOOtEvwDpjW

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/320-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000800000001222c-11.dat	CryptoLocker_rule2
behavioral1/memory/320-12-0x0000000002800000-0x0000000002810000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/320-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2412-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2412-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/320-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000800000001222c-11.dat	CryptoLocker_set1
behavioral1/memory/320-12-0x0000000002800000-0x0000000002810000-memory.dmp	CryptoLocker_set1
behavioral1/memory/320-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2412-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2412-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/320-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000800000001222c-11.dat	UPX
behavioral1/memory/320-12-0x0000000002800000-0x0000000002810000-memory.dmp	UPX
behavioral1/memory/320-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2412-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2412-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2412	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
320	2024-03-28_762a0f89409ec40d245daf8f0ffb4bff_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/320-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000800000001222c-11.dat	upx
behavioral1/memory/320-12-0x0000000002800000-0x0000000002810000-memory.dmp	upx
behavioral1/memory/320-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2412-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2412-27-0x0000000000500000-0x000000000050F311-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 320 wrote to memory of 2412	320	2024-03-28_762a0f89409ec40d245daf8f0ffb4bff_cryptolocker.exe	28
PID 320 wrote to memory of 2412	320	2024-03-28_762a0f89409ec40d245daf8f0ffb4bff_cryptolocker.exe	28
PID 320 wrote to memory of 2412	320	2024-03-28_762a0f89409ec40d245daf8f0ffb4bff_cryptolocker.exe	28
PID 320 wrote to memory of 2412	320	2024-03-28_762a0f89409ec40d245daf8f0ffb4bff_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-28_762a0f89409ec40d245daf8f0ffb4bff_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_762a0f89409ec40d245daf8f0ffb4bff_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:320
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2412

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
106KB

MD5
e3c9272603da5c048448c0a31ae7a35c

SHA1
906faa2846a5912bc463bd3832e2319f36e36ef6

SHA256
719afa9cabba933473ed55779880065abb9a495aa2822505501b7de3b900fa02

SHA512
a8200bbca471c4cda14796ae182cdbef468ca75abf8e64ee3cb08e78fab0e8b62db8df8a881efa05c206826114a13d4b4137a53957a6f9f3767c7b788f30d79f

Download Submit
memory/320-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/320-1-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/320-2-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/320-3-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/320-12-0x0000000002800000-0x0000000002810000-memory.dmp

Filesize
64KB

Download
memory/320-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2412-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2412-19-0x0000000000210000-0x0000000000216000-memory.dmp

Filesize
24KB

Download
memory/2412-26-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2412-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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