df6753a501de5826c4b2a64ea1d84e58be2d67aa746f73ec4e5ef412805d7877

General

Target

2024-04-19_2526995c83ab7fd5ddbe1363f6b0a2b2_cryptolocker.exe
Size

74KB
MD5

2526995c83ab7fd5ddbe1363f6b0a2b2
SHA1

bf616487c5d99df02b82ab3963264fb9721cb4cf
SHA256

df6753a501de5826c4b2a64ea1d84e58be2d67aa746f73ec4e5ef412805d7877
SHA512

bc37716ddcd826f8d1e419398c74de0e27dbc1cae82818bc05ba0f5ed588ea1454022858127aa56672c091c62fd03b8895ef4635f56f0762c82f5833b8498ef3
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsaleFL:1nK6a+qdOOtEvwDpjt

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2244-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012262-11.dat	CryptoLocker_rule2
behavioral1/memory/2244-13-0x0000000001F20000-0x0000000001F30000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2244-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2716-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2716-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2244-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000012262-11.dat	CryptoLocker_set1
behavioral1/memory/2244-13-0x0000000001F20000-0x0000000001F30000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2244-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2716-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2716-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2244-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000c000000012262-11.dat	UPX
behavioral1/memory/2244-13-0x0000000001F20000-0x0000000001F30000-memory.dmp	UPX
behavioral1/memory/2244-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2716-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2716-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2716	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2244	2024-04-19_2526995c83ab7fd5ddbe1363f6b0a2b2_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2244-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000c000000012262-11.dat	upx
behavioral1/memory/2244-13-0x0000000001F20000-0x0000000001F30000-memory.dmp	upx
behavioral1/memory/2244-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2716-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2716-27-0x0000000000500000-0x000000000050F311-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 2244 wrote to memory of 2716	2244	2024-04-19_2526995c83ab7fd5ddbe1363f6b0a2b2_cryptolocker.exe	28
PID 2244 wrote to memory of 2716	2244	2024-04-19_2526995c83ab7fd5ddbe1363f6b0a2b2_cryptolocker.exe	28
PID 2244 wrote to memory of 2716	2244	2024-04-19_2526995c83ab7fd5ddbe1363f6b0a2b2_cryptolocker.exe	28
PID 2244 wrote to memory of 2716	2244	2024-04-19_2526995c83ab7fd5ddbe1363f6b0a2b2_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-19_2526995c83ab7fd5ddbe1363f6b0a2b2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-19_2526995c83ab7fd5ddbe1363f6b0a2b2_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2244
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2716

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

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
74KB

MD5
f181e69223ca59b8a5f482d78180cf18

SHA1
246287e9b6c93e429b743b04b7e3fc9e5b861549

SHA256
35cb48fc99563274fd215d84344cfec4fc21f53f20e18e05cd47da19a86056b3

SHA512
c2eef750a54d78629cf442eec5d87b3ed0901bdb8283fb311a1e8476509444926c24650b8f204a072cdf943f96f258da20d1cf82fed1c5190cf757105584f8ff

Download Submit
memory/2244-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2244-1-0x00000000003A0000-0x00000000003A6000-memory.dmp

Filesize
24KB

Download
memory/2244-2-0x0000000000450000-0x0000000000456000-memory.dmp

Filesize
24KB

Download
memory/2244-3-0x00000000003A0000-0x00000000003A6000-memory.dmp

Filesize
24KB

Download
memory/2244-13-0x0000000001F20000-0x0000000001F30000-memory.dmp

Filesize
64KB

Download
memory/2244-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2716-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2716-19-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2716-24-0x00000000001E0000-0x00000000001E6000-memory.dmp

Filesize
24KB

Download
memory/2716-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

Sharing