4abefca220a5eafc65e39a3b3e7ddfb0211177c7cd618c1a5996e1e4983db161

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
23-05-2024 02:22

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General

Target

2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe
Size

78KB
MD5

01531e7bd4fedebfe831ab2ba708d5ee
SHA1

16dd0b24012b7e198ca96ba577d0745ad924e8e9
SHA256

4abefca220a5eafc65e39a3b3e7ddfb0211177c7cd618c1a5996e1e4983db161
SHA512

24a4451ea125140d9e7c1031e79c021ad1f0f16594751cd89b4b1671f7afc23d70d926575a96a24693f3b8bd98aba84194e0834edb5fc2c90121d509f18eff70
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1FN:T6a+rdOOtEvwDpjNtHPc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2396-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2396-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2556-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2556-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2396-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2396-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2556-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2556-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2396-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2396-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2556-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2556-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2556 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe

pid process

2396 2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe

pid	process
2556	asih.exe

pid	process
2396	2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2396-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2396-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2556-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2556-25-0x0000000000500000-0x0000000000510000-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_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe

description	pid	process	target process
PID 2396 wrote to memory of 2556	2396	2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe	asih.exe
PID 2396 wrote to memory of 2556	2396	2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe	asih.exe
PID 2396 wrote to memory of 2556	2396	2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe	asih.exe
PID 2396 wrote to memory of 2556	2396	2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_01531e7bd4fedebfe831ab2ba708d5ee_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2396

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2556

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

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
78KB

MD5
301cbfdb64f23acd68f5c0e548d8b8ba

SHA1
82b175bbeb2f17568e50a6f879ce0b0728e99b13

SHA256
8c4cdf00be031824fcf7e59f5fcf568bf60bf84c865f1ed0bad1f4cbe8086f98

SHA512
fb7c2cfaf3ac41335d77642b895cf165cda800f54dac416fc3e1c0dcd53bcd5944aeeb43c948ac51f39a51a535567f4900742d3fcc0bc84c3ae3acd2341a9e9c

Download Submit
memory/2396-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2396-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2396-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2396-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2396-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2556-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2556-18-0x0000000000210000-0x0000000000216000-memory.dmp

Filesize
24KB

Download
memory/2556-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download