9331f721bff96d9211a48d60defc44899844996c0f68025f47843e60f191e0f2

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25-01-2024 15:53

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General

Target

2024-01-25_e544072e1ad79a163137695486aa0256_cryptolocker.exe
Size

80KB
MD5

e544072e1ad79a163137695486aa0256
SHA1

a5ed04e3e7b734f3f29215869dbf9b0fe6b8874d
SHA256

9331f721bff96d9211a48d60defc44899844996c0f68025f47843e60f191e0f2
SHA512

397312321c6127ac20bb2b0aee67d255172fb34deb0801771739847484c26797fa9f730eb9c64575fc319df4a73ec57af8ffee123ba2fb2573d0d7cc39cf855c
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT78:T6a+rdOOtEvwDpjNQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2144-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2056-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2056-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2144-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2056-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2056-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2144-8-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2056-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2056-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2056 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-01-25_e544072e1ad79a163137695486aa0256_cryptolocker.exe

pid process

2144 2024-01-25_e544072e1ad79a163137695486aa0256_cryptolocker.exe

pid	process
2056	asih.exe

pid	process
2144	2024-01-25_e544072e1ad79a163137695486aa0256_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2144-8-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2056-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2056-25-0x0000000000500000-0x0000000000510000-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:

2024-01-25_e544072e1ad79a163137695486aa0256_cryptolocker.exe

description	pid	process	target process
PID 2144 wrote to memory of 2056	2144	2024-01-25_e544072e1ad79a163137695486aa0256_cryptolocker.exe	asih.exe
PID 2144 wrote to memory of 2056	2144	2024-01-25_e544072e1ad79a163137695486aa0256_cryptolocker.exe	asih.exe
PID 2144 wrote to memory of 2056	2144	2024-01-25_e544072e1ad79a163137695486aa0256_cryptolocker.exe	asih.exe
PID 2144 wrote to memory of 2056	2144	2024-01-25_e544072e1ad79a163137695486aa0256_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-01-25_e544072e1ad79a163137695486aa0256_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_e544072e1ad79a163137695486aa0256_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2144

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2056

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
81KB

MD5
e1b5562e78c9ff00513b4526e7a3b96e

SHA1
415c98993851563549732a2d916754194bbcb4f5

SHA256
e69fba2faf44edba678c839f8fb18f74e1d68f43440886d4600324c55318466c

SHA512
c1883236d05c1a93b5550cf1a36917f1ef8c19494964f1e7ef0658e728af0e45adddf3e0c97b7b74db1e7778bb0d9e025a4f3b5ff046189c16c79ee25058d85a

Download Submit
memory/2056-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2056-17-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2056-24-0x0000000000430000-0x0000000000436000-memory.dmp

Filesize
24KB

Download
memory/2056-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2144-0-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2144-8-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2144-9-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2144-1-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download