ae0c031d2ef7fc3d45398c0f06731471f87b9dfe18be8cd7f5ebde550c9f09cb

General

Target

2024-05-23_cfff8ff2f822f99920d97ae94a8d3e87_cryptolocker.exe
Size

40KB
MD5

cfff8ff2f822f99920d97ae94a8d3e87
SHA1

37df2aa4d6d2caebfa443cf61f6db7628f3a916d
SHA256

ae0c031d2ef7fc3d45398c0f06731471f87b9dfe18be8cd7f5ebde550c9f09cb
SHA512

b83e5fa125523d571fb33fcf20e618b1a1d02a827bc7176b6df325f6c91742479f43523e09dc374a838db5cdfc93b2825b5e8a8b160c8f87fc2f59189598ba6b
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBcF:qDdFJy3QMOtEvwDpjjWMl7Td+

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1836-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1836-13-0x0000000000660000-0x0000000000670000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2912-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1836-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1836-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1836-13-0x0000000000660000-0x0000000000670000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2912-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1836-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1836-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1836-13-0x0000000000660000-0x0000000000670000-memory.dmp	UPX
behavioral1/memory/2912-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1836-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2912 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_cfff8ff2f822f99920d97ae94a8d3e87_cryptolocker.exe

pid process

1836 2024-05-23_cfff8ff2f822f99920d97ae94a8d3e87_cryptolocker.exe

pid	process
2912	asih.exe

pid	process
1836	2024-05-23_cfff8ff2f822f99920d97ae94a8d3e87_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1836-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1836-13-0x0000000000660000-0x0000000000670000-memory.dmp	upx
behavioral1/memory/2912-27-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1836-17-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_cfff8ff2f822f99920d97ae94a8d3e87_cryptolocker.exe

description	pid	process	target process
PID 1836 wrote to memory of 2912	1836	2024-05-23_cfff8ff2f822f99920d97ae94a8d3e87_cryptolocker.exe	asih.exe
PID 1836 wrote to memory of 2912	1836	2024-05-23_cfff8ff2f822f99920d97ae94a8d3e87_cryptolocker.exe	asih.exe
PID 1836 wrote to memory of 2912	1836	2024-05-23_cfff8ff2f822f99920d97ae94a8d3e87_cryptolocker.exe	asih.exe
PID 1836 wrote to memory of 2912	1836	2024-05-23_cfff8ff2f822f99920d97ae94a8d3e87_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_cfff8ff2f822f99920d97ae94a8d3e87_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_cfff8ff2f822f99920d97ae94a8d3e87_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1836

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2912

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
40KB

MD5
ae52280a09d1c38f2edc8cabd89fafd8

SHA1
46d92e9bd1d070e5eb29ce87598c326486807841

SHA256
85f85823227fb290a73c157abdb8a7818d69a67bcdd9025a31703b3d029482d8

SHA512
22d9ba0e28af2ef2e68e1808dcb2e5dc90ebd725b262b4a95557de2ba6c287e18e22a14fa0938d47af243232ea0cfdb0d60a2f61616ee8d08c2bd6dda22c9471

Download Submit
memory/1836-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1836-1-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/1836-3-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/1836-2-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/1836-13-0x0000000000660000-0x0000000000670000-memory.dmp

Filesize
64KB

Download
memory/1836-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2912-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2912-26-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2912-19-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads