04f67fec147397e62fec99b403f60826a0d3c2d72840e53b06d80e8488dcea47

General

Target

2024-03-25_7be114a268970d80571e557f13d6d060_cryptolocker.exe
Size

61KB
MD5

7be114a268970d80571e557f13d6d060
SHA1

2d8a64d5ff5d82d0581f2df890c8670d215a77b6
SHA256

04f67fec147397e62fec99b403f60826a0d3c2d72840e53b06d80e8488dcea47
SHA512

5f12e3dfaaf85b3c4edffaa20c9f7621aff5aafe91266c4f2476f3209611f3efb225e61e181c3b62440c100e9ffc1ff8f4b26e63ddf7faa6fd387f990737b25e
SSDEEP

768:P8mnjO6LsoEEeegiZPvEhHSG+gbum/kLyMro2GtOOtEvwDpjKvWxHCbSVaFn0jK5:P8mnK6QFElP6n+gymddpMOtEvwDpjYP

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2188-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b0000000121c5-11.dat	CryptoLocker_rule2
behavioral1/memory/2284-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2188-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2188-13-0x00000000026C0000-0x00000000026D0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2284-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2188-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b0000000121c5-11.dat	CryptoLocker_set1
behavioral1/memory/2284-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2188-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2188-13-0x00000000026C0000-0x00000000026D0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2284-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2188-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000b0000000121c5-11.dat	UPX
behavioral1/memory/2284-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2188-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2188-13-0x00000000026C0000-0x00000000026D0000-memory.dmp	UPX
behavioral1/memory/2284-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2284	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2188	2024-03-25_7be114a268970d80571e557f13d6d060_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2188-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000b0000000121c5-11.dat	upx
behavioral1/memory/2284-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2188-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2188-13-0x00000000026C0000-0x00000000026D0000-memory.dmp	upx
behavioral1/memory/2284-27-0x0000000000500000-0x000000000050F311-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 2188 wrote to memory of 2284	2188	2024-03-25_7be114a268970d80571e557f13d6d060_cryptolocker.exe	28
PID 2188 wrote to memory of 2284	2188	2024-03-25_7be114a268970d80571e557f13d6d060_cryptolocker.exe	28
PID 2188 wrote to memory of 2284	2188	2024-03-25_7be114a268970d80571e557f13d6d060_cryptolocker.exe	28
PID 2188 wrote to memory of 2284	2188	2024-03-25_7be114a268970d80571e557f13d6d060_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-25_7be114a268970d80571e557f13d6d060_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-25_7be114a268970d80571e557f13d6d060_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2188
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2284

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
61KB

MD5
d3651ca07df665c42d039bc747dde32c

SHA1
48575d9840e5257113c35867484c6fb33f966ae5

SHA256
6e012bb9b2a3196c7f4e38f3f04c9ee5528de43a1c5040fa29daed8155f1664a

SHA512
559a73a3fc6e13d6414d68717e101aac775229c72d936e4dadc45bfe8ca76654d0fd149fe3b593a0cd93ed24cc4759153516378b6de322fd5c01b0058a6f1ccd

Download Submit
memory/2188-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2188-1-0x00000000003D0000-0x00000000003D6000-memory.dmp

Filesize
24KB

Download
memory/2188-2-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/2188-4-0x00000000003D0000-0x00000000003D6000-memory.dmp

Filesize
24KB

Download
memory/2188-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2188-13-0x00000000026C0000-0x00000000026D0000-memory.dmp

Filesize
64KB

Download
memory/2284-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2284-20-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/2284-19-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2284-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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