31098a390af934db3da45f5999937b5044f16afc9bbaba98571f6f0b9b4e3409

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
06/03/2024, 14:41

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General

Target

2024-03-06_f1d326ed03b1cb7df5aac3bbfb2a2e62_cryptolocker.exe
Size

105KB
MD5

f1d326ed03b1cb7df5aac3bbfb2a2e62
SHA1

e5fc9f40fa8eaf6c3be2c5c557b5a607107a5ea6
SHA256

31098a390af934db3da45f5999937b5044f16afc9bbaba98571f6f0b9b4e3409
SHA512

bc6e2097e94ffb611368747fd3f575be32679b3fc90fa2b26d477ab7621d3210124f7b977fad971a7be147c0b89dd9a4ceaed7441f12cd99fe14950c8e32ab01
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GksyJ:1nK6a+qdOOtEvwDpjyJ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2036-1-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000e000000012253-11.dat	CryptoLocker_rule2
behavioral1/memory/2036-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2080-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2080-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2036-1-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000e000000012253-11.dat	CryptoLocker_set1
behavioral1/memory/2036-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2080-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2080-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2036-1-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000e000000012253-11.dat	UPX
behavioral1/memory/2036-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2080-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2080-25-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2080	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2036	2024-03-06_f1d326ed03b1cb7df5aac3bbfb2a2e62_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2036-1-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000e000000012253-11.dat	upx
behavioral1/memory/2036-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2080-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2080-25-0x0000000000500000-0x000000000050F311-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 2036 wrote to memory of 2080	2036	2024-03-06_f1d326ed03b1cb7df5aac3bbfb2a2e62_cryptolocker.exe	28
PID 2036 wrote to memory of 2080	2036	2024-03-06_f1d326ed03b1cb7df5aac3bbfb2a2e62_cryptolocker.exe	28
PID 2036 wrote to memory of 2080	2036	2024-03-06_f1d326ed03b1cb7df5aac3bbfb2a2e62_cryptolocker.exe	28
PID 2036 wrote to memory of 2080	2036	2024-03-06_f1d326ed03b1cb7df5aac3bbfb2a2e62_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-06_f1d326ed03b1cb7df5aac3bbfb2a2e62_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-06_f1d326ed03b1cb7df5aac3bbfb2a2e62_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2036
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2080

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
105KB

MD5
0097a2ed9c380a257d7aebfd2742dc9a

SHA1
87ea776b23dad4de63091db4bfa27108f9ccaf8b

SHA256
14607b08c60e204f7833e11f663ab647f8d6ec3db6c443b10a2e3e67bf6554ec

SHA512
3d716803dc39a7c07e9fe8cf540669bd7d90ef88cec4d396913cfa27ef584e0df351a8279b550d0931bdf7cf86cbace854257318740551462430eee992912931

Download Submit
memory/2036-1-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2036-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2036-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2036-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2036-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2080-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2080-25-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download