bcda863bf78d7788c15c4c12acd0fa67f4b9ba9e80980688df852eea227a3a46

General

Target

2024-04-22_7afc322bcd8d5a20557f39d824feb6d5_cryptolocker.exe
Size

77KB
MD5

7afc322bcd8d5a20557f39d824feb6d5
SHA1

55453b8dfcfa0cac88dae5cdfb871e724ff49886
SHA256

bcda863bf78d7788c15c4c12acd0fa67f4b9ba9e80980688df852eea227a3a46
SHA512

36180970c0780eb6682bf966767729b8a99276d51419edbeaad9cb3989617f70fa78b14da7a365c8cb53d48e7136b411278527a58eae26afa781131f2112a9b9
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJcRF:T6a+rdOOtEvwDpjNtw

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/3012-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b00000001224c-11.dat	CryptoLocker_rule2
behavioral1/memory/3012-13-0x0000000001F20000-0x0000000001F30000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2552-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3012-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2552-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/3012-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b00000001224c-11.dat	CryptoLocker_set1
behavioral1/memory/3012-13-0x0000000001F20000-0x0000000001F30000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2552-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3012-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2552-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/3012-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b00000001224c-11.dat	UPX
behavioral1/memory/3012-13-0x0000000001F20000-0x0000000001F30000-memory.dmp	UPX
behavioral1/memory/2552-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3012-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2552-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2552	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
3012	2024-04-22_7afc322bcd8d5a20557f39d824feb6d5_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3012-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b00000001224c-11.dat	upx
behavioral1/memory/3012-13-0x0000000001F20000-0x0000000001F30000-memory.dmp	upx
behavioral1/memory/2552-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3012-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2552-26-0x0000000000500000-0x0000000000510000-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 3012 wrote to memory of 2552	3012	2024-04-22_7afc322bcd8d5a20557f39d824feb6d5_cryptolocker.exe	28
PID 3012 wrote to memory of 2552	3012	2024-04-22_7afc322bcd8d5a20557f39d824feb6d5_cryptolocker.exe	28
PID 3012 wrote to memory of 2552	3012	2024-04-22_7afc322bcd8d5a20557f39d824feb6d5_cryptolocker.exe	28
PID 3012 wrote to memory of 2552	3012	2024-04-22_7afc322bcd8d5a20557f39d824feb6d5_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-22_7afc322bcd8d5a20557f39d824feb6d5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-22_7afc322bcd8d5a20557f39d824feb6d5_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3012
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2552

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
77KB

MD5
93dd46c7f10619f3fb9ad06aa95dd4b9

SHA1
29aee7c84ab3712195c51913abf6fc6b56967994

SHA256
2bc6faf35db8b055b934a695607909c327123a896f31eb2cce04e656c4ea8d58

SHA512
8b6a9b5eb17d1040eee6f2bfc4c7a7566144715ca223f0a58b183ee4558701bccb9d11963f8d40fa08e9c5ea2bc53583982881518bdf998c42ee40bccaba4f62

Download Submit
memory/2552-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2552-19-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2552-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3012-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3012-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3012-2-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/3012-4-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3012-13-0x0000000001F20000-0x0000000001F30000-memory.dmp

Filesize
64KB

Download
memory/3012-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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