3a338580ea7e356764da136475b8c563e22d771665ee01a6e843fb0ace751bfd

Analysis

max time kernel
150s
max time network
138s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
07/03/2024, 00:58

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General

Target

2024-03-07_ab52184e2b09537a9c62d8f7d8f3b5e9_cryptolocker.exe
Size

126KB
MD5

ab52184e2b09537a9c62d8f7d8f3b5e9
SHA1

ef0066999894b40f3805307a2934b9916e39b9d1
SHA256

3a338580ea7e356764da136475b8c563e22d771665ee01a6e843fb0ace751bfd
SHA512

87c759abc973041814c2ffaf1dc95f1874886f1901ebb62ec4cf1c3fa1b3e7d306a013c5b46c55955eb86689425a55197878d50fd350a3a585a406b79ec4ee43
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eIL:AnBdOOtEvwDpj6zy

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2384-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012328-11.dat	CryptoLocker_rule2
behavioral1/memory/2384-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2964-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2964-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2384-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000012328-11.dat	CryptoLocker_set1
behavioral1/memory/2384-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2964-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2964-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2384-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000c000000012328-11.dat	UPX
behavioral1/memory/2384-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2964-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2964-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2964	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2384	2024-03-07_ab52184e2b09537a9c62d8f7d8f3b5e9_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2384-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000c000000012328-11.dat	upx
behavioral1/memory/2384-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2964-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2964-26-0x0000000000500000-0x000000000050F000-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 2384 wrote to memory of 2964	2384	2024-03-07_ab52184e2b09537a9c62d8f7d8f3b5e9_cryptolocker.exe	28
PID 2384 wrote to memory of 2964	2384	2024-03-07_ab52184e2b09537a9c62d8f7d8f3b5e9_cryptolocker.exe	28
PID 2384 wrote to memory of 2964	2384	2024-03-07_ab52184e2b09537a9c62d8f7d8f3b5e9_cryptolocker.exe	28
PID 2384 wrote to memory of 2964	2384	2024-03-07_ab52184e2b09537a9c62d8f7d8f3b5e9_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-07_ab52184e2b09537a9c62d8f7d8f3b5e9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-07_ab52184e2b09537a9c62d8f7d8f3b5e9_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2384
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2964

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
127KB

MD5
77808d5bdaddde5b914fcfca20e41d8f

SHA1
7cbc3185a3faaee404b9a1a1781fdf726149a448

SHA256
9647bfd44360e0252ff995c06eef81117906af4c78b5ca58c2add8d6c34f91c1

SHA512
8ac4ecaebdd76778e4c42be2312d969a936f2012cd97fc9c8bcf8f9617a1402d8c2fbfcbee0b1d527c0bb4254f555fe316dd733f70b056d49d502d556adcd719

Download Submit
memory/2384-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2384-1-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2384-3-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2384-2-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2384-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2964-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2964-18-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2964-25-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2964-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download