2f5645ad70b305f7de062f127a675a248a36e7d91c4b124230a15401de98be6a

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
28/02/2024, 15:28

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General

Target

2024-02-28_11fd7696854585e1e9437ef13fe1881c_cryptolocker.exe
Size

100KB
MD5

11fd7696854585e1e9437ef13fe1881c
SHA1

b0602872e7bde3b05c7d5421ef0e253d81a732c2
SHA256

2f5645ad70b305f7de062f127a675a248a36e7d91c4b124230a15401de98be6a
SHA512

bcebd9f4370a7518cb1d4d9e4e26c157f7ffb360c512b86809a8bdb3d746d1bee3d3976e1133a927e5a463468de5a8cd8c859ac45f1fc1dc4d6cd7d43005a978
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviy6Z:AnBdOOtEvwDpj6zF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2248-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2248-14-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0009000000012226-11.dat	CryptoLocker_rule2
behavioral1/memory/2552-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2552-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2248-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2248-14-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0009000000012226-11.dat	CryptoLocker_set1
behavioral1/memory/2552-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2552-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2248-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2248-14-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x0009000000012226-11.dat	UPX
behavioral1/memory/2552-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2552-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2552	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2248	2024-02-28_11fd7696854585e1e9437ef13fe1881c_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2248-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2248-14-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x0009000000012226-11.dat	upx
behavioral1/memory/2552-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2552-26-0x0000000000500000-0x000000000050F000-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 2248 wrote to memory of 2552	2248	2024-02-28_11fd7696854585e1e9437ef13fe1881c_cryptolocker.exe	28
PID 2248 wrote to memory of 2552	2248	2024-02-28_11fd7696854585e1e9437ef13fe1881c_cryptolocker.exe	28
PID 2248 wrote to memory of 2552	2248	2024-02-28_11fd7696854585e1e9437ef13fe1881c_cryptolocker.exe	28
PID 2248 wrote to memory of 2552	2248	2024-02-28_11fd7696854585e1e9437ef13fe1881c_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-28_11fd7696854585e1e9437ef13fe1881c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_11fd7696854585e1e9437ef13fe1881c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2248
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2552

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
101KB

MD5
73952504c955d3e2c93c234a7bd643bc

SHA1
fbab8093beadc08b6b324ff84921c7249c9b930e

SHA256
0726c5475d1ef6c6f067c39133b5e29da54f225a8540a705bfb7a62b32b7595d

SHA512
b831ae8d75ea1a6ee3067ac44bfca29fbe3f9aae0e44af96f9e9fe6de30940e73b2e5baa2daf7ab65096c374b7396325f033d763d2a0ff841975d59d1b9289fa

Download Submit
memory/2248-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2248-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2248-3-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2248-2-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2248-14-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2552-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2552-18-0x0000000000450000-0x0000000000456000-memory.dmp

Filesize
24KB

Download
memory/2552-20-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2552-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download