b6eff88fe5c80a21524ddf67a0f68529fb648196eada34849898094e2bda086f

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
23/02/2024, 15:01

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General

Target

2024-02-23_531b1f068781d8d656db25dae5a04895_cryptolocker.exe
Size

88KB
MD5

531b1f068781d8d656db25dae5a04895
SHA1

15b4a519f48dc903dbe6eb197e3a4b21872c915f
SHA256

b6eff88fe5c80a21524ddf67a0f68529fb648196eada34849898094e2bda086f
SHA512

fcaee05173c711b3e2a16a625b11158a47bc7f37b4104e77dc134adbd66adf1a1aabda578c53940a10092ef758f0c6dd217433bbc515577f888b220265724db5
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgL9:AnBdOOtEvwDpj6zF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/3028-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3028-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000012252-14.dat	CryptoLocker_rule2
behavioral1/memory/2380-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/3028-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3028-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a000000012252-14.dat	CryptoLocker_set1
behavioral1/memory/2380-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/3028-1-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/3028-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000a000000012252-14.dat	UPX
behavioral1/memory/2380-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2380	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
3028	2024-02-23_531b1f068781d8d656db25dae5a04895_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3028-1-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/3028-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000a000000012252-14.dat	upx
behavioral1/memory/2380-26-0x0000000000500000-0x000000000050F000-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 3028 wrote to memory of 2380	3028	2024-02-23_531b1f068781d8d656db25dae5a04895_cryptolocker.exe	28
PID 3028 wrote to memory of 2380	3028	2024-02-23_531b1f068781d8d656db25dae5a04895_cryptolocker.exe	28
PID 3028 wrote to memory of 2380	3028	2024-02-23_531b1f068781d8d656db25dae5a04895_cryptolocker.exe	28
PID 3028 wrote to memory of 2380	3028	2024-02-23_531b1f068781d8d656db25dae5a04895_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-23_531b1f068781d8d656db25dae5a04895_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_531b1f068781d8d656db25dae5a04895_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3028
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2380

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

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

Filesize
88KB

MD5
0ebaec12b219817bde124eaae0c2c260

SHA1
2a97f87ebecf6eee65b41f73f246a4e4278eb2f5

SHA256
77cf44c51ad2f489f2a12affbd37241d316b376ad4f12d56a09a795c262d53ad

SHA512
66075db413dd74e4030e399f53819a5f9d6b3fd7f5e95c0afc1df43b1be9b5cad185d6004e5e8e3a1627fc93751328eb8900bd58fe5506e7dba9120bc20de3f1

Download Submit
memory/2380-18-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2380-20-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2380-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3028-1-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3028-0-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/3028-2-0x0000000000210000-0x0000000000216000-memory.dmp

Filesize
24KB

Download
memory/3028-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/3028-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download