82c3359af10292ed00e6e49846787e1b9cc0d7275e84266caea85541b69644b4

General

Target

2024-04-27_6a617032c916f98522e30be47fb55403_cryptolocker.exe
Size

87KB
MD5

6a617032c916f98522e30be47fb55403
SHA1

d08df245e23d7972383574bc47c8118d84bf3b39
SHA256

82c3359af10292ed00e6e49846787e1b9cc0d7275e84266caea85541b69644b4
SHA512

f5ebe7a59afd716cdfbf9f5e2f54307249d32d5ae89946f331031f0739e17cc247b4d1b7c2b30ae5ff5f88be18125a2c7ab1773436130537d8eaef227a1bae13
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIOD1:qkmnpomddpMOtEvwDpjJGYQbN/PKwMg7

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2924-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d000000012324-11.dat	CryptoLocker_rule2
behavioral1/memory/2924-13-0x0000000000580000-0x000000000058F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2924-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2920-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2920-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2924-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d000000012324-11.dat	CryptoLocker_set1
behavioral1/memory/2924-13-0x0000000000580000-0x000000000058F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2924-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2920-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2920-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2924-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000d000000012324-11.dat	UPX
behavioral1/memory/2924-13-0x0000000000580000-0x000000000058F000-memory.dmp	UPX
behavioral1/memory/2924-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2920-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2920-28-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2920	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2924	2024-04-27_6a617032c916f98522e30be47fb55403_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2924-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000d000000012324-11.dat	upx
behavioral1/memory/2924-13-0x0000000000580000-0x000000000058F000-memory.dmp	upx
behavioral1/memory/2924-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2920-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2920-28-0x0000000000500000-0x000000000050F000-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 2924 wrote to memory of 2920	2924	2024-04-27_6a617032c916f98522e30be47fb55403_cryptolocker.exe	28
PID 2924 wrote to memory of 2920	2924	2024-04-27_6a617032c916f98522e30be47fb55403_cryptolocker.exe	28
PID 2924 wrote to memory of 2920	2924	2024-04-27_6a617032c916f98522e30be47fb55403_cryptolocker.exe	28
PID 2924 wrote to memory of 2920	2924	2024-04-27_6a617032c916f98522e30be47fb55403_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-27_6a617032c916f98522e30be47fb55403_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_6a617032c916f98522e30be47fb55403_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2924
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2920

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
87KB

MD5
cb0cb74543065b9a110307ad07cd74dc

SHA1
e0bfd928bcc8aa0958225852df6f0cf48d0f8995

SHA256
d75a028277fff21e066f9e533f0a0dd437bfa136142f8afbadf96c17857d5122

SHA512
3f6fcb852600826745f5f8582c790f4c43cef3fe1812b5868bdaab3640c32e9a70583b329dd3fc77e788859f4e59c025b740d54d2282ace89548fbed1dd55f03

Download Submit
memory/2920-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2920-20-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2920-27-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2920-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2924-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2924-1-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2924-2-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2924-9-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2924-13-0x0000000000580000-0x000000000058F000-memory.dmp

Filesize
60KB

Download
memory/2924-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

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