4d1c5ea8ba126e3e95d55b1f06ea617cc0afe15fab76be488d32069ae5a6d843

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 02:32

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General

Target

2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe
Size

90KB
MD5

74c200cf506b6cc8f2428a66d3fac4d6
SHA1

ebe5d25c80870069f3a9dcb27285f9340b61baa8
SHA256

4d1c5ea8ba126e3e95d55b1f06ea617cc0afe15fab76be488d32069ae5a6d843
SHA512

5000634a5edf512eb80b997fd321e76adb2c46dd5051b05008bda9d60db69000528c2c093cc5dfb92d26098d7bde01c9a31bac0a9234e9572a8fb2e9dda5a44e
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAH5:n6a+1SEOtEvwDpjYYvQd2PZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1704-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1704-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2804-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1704-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1704-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2804-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1704-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1704-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2804-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2804 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe

pid process

1704 2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe

pid	process
2804	asih.exe

pid	process
1704	2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1704-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1704-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2804-25-0x0000000000500000-0x0000000000510000-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_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe

description	pid	process	target process
PID 1704 wrote to memory of 2804	1704	2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe	asih.exe
PID 1704 wrote to memory of 2804	1704	2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe	asih.exe
PID 1704 wrote to memory of 2804	1704	2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe	asih.exe
PID 1704 wrote to memory of 2804	1704	2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1704

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2804

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
91KB

MD5
3d67842d700704bf5aa33fb3882064d2

SHA1
6ed7037fb6cb7041836d7dd33dcf101da404cec4

SHA256
ff4b604cb53bd5dae2e2646504ac360d3ae361fecc2c349417ccdb39e561ce12

SHA512
e7a75196428afea700b320e4f7b769e74e89f65cfac17f544c01cb68df779e530aafa2ae2c7c9d704b2a1955d7f0c13c1bacc2f353359c20bad3d25b58bb8ed5

Download Submit
memory/1704-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1704-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1704-2-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1704-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1704-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2804-24-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2804-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download