57d9fa1b588c2d7f49d8c93f524986abeefd774371570c2c394f2a808ef3d5ae

General

Target

2024-02-03_0247d042230d4eafbd01db3cf58e0805_cryptolocker.exe
Size

107KB
MD5

0247d042230d4eafbd01db3cf58e0805
SHA1

91ec7222be49cfe7e9a9da86e2aae5d6728896f8
SHA256

57d9fa1b588c2d7f49d8c93f524986abeefd774371570c2c394f2a808ef3d5ae
SHA512

2f766cd4b4ce68edaed32c5f931d8a9aed80c5c96dd49a0ead29cc0cdbe6dc51b8b5b3453690a46b0c13a905443691b6bea1391bb4a2f22f9fd11a323d9878b4
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GksgEmS:1nK6a+qdOOtEvwDpjz

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2516-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000012232-11.dat	CryptoLocker_rule2
behavioral1/memory/2516-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2660-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2516-12-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2660-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2516-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a000000012232-11.dat	CryptoLocker_set1
behavioral1/memory/2516-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2660-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2516-12-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2660-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2516-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000a000000012232-11.dat	UPX
behavioral1/memory/2516-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2660-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2516-12-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	UPX
behavioral1/memory/2660-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2660	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2516	2024-02-03_0247d042230d4eafbd01db3cf58e0805_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2516-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000a000000012232-11.dat	upx
behavioral1/memory/2516-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2660-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2516-12-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	upx
behavioral1/memory/2660-27-0x0000000000500000-0x000000000050F311-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 2516 wrote to memory of 2660	2516	2024-02-03_0247d042230d4eafbd01db3cf58e0805_cryptolocker.exe	28
PID 2516 wrote to memory of 2660	2516	2024-02-03_0247d042230d4eafbd01db3cf58e0805_cryptolocker.exe	28
PID 2516 wrote to memory of 2660	2516	2024-02-03_0247d042230d4eafbd01db3cf58e0805_cryptolocker.exe	28
PID 2516 wrote to memory of 2660	2516	2024-02-03_0247d042230d4eafbd01db3cf58e0805_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-03_0247d042230d4eafbd01db3cf58e0805_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-03_0247d042230d4eafbd01db3cf58e0805_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2516
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2660

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
107KB

MD5
e576ae2ffaea84b6544c2d7859a06137

SHA1
0e29ca8610aedb5ba3ff1cd8d78cf067f4704dea

SHA256
a9b544c89f76e7554723c739356d79a5be7527160641f9eb4b05345d10b371e8

SHA512
4b3ca9c90c16c62b112624d38ccddef18398f6a8aa6f881a678ba6bd66bb3335abc647ee49a0c11f2b944e582a949bfcce57385e31307d2040511c4023ffa709

Download Submit
memory/2516-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2516-1-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2516-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2516-3-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/2516-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2516-12-0x0000000002BC0000-0x0000000002BD0000-memory.dmp

Filesize
64KB

Download
memory/2660-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2660-20-0x00000000002A0000-0x00000000002A6000-memory.dmp

Filesize
24KB

Download
memory/2660-19-0x00000000001E0000-0x00000000001E6000-memory.dmp

Filesize
24KB

Download
memory/2660-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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