5a8df0d1c89dd780ccb964292945346cb94582cc8f4b06ee1061563ec055f75c

Analysis

max time kernel
147s
max time network
148s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
28-01-2024 12:33

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General

Target

2024-01-28_6553bd589058f7c804b5f2f59022c7a8_cryptolocker.exe
Size

61KB
MD5

6553bd589058f7c804b5f2f59022c7a8
SHA1

45c107beb4a3b52e76bb668d29dc12a6608ca4d4
SHA256

5a8df0d1c89dd780ccb964292945346cb94582cc8f4b06ee1061563ec055f75c
SHA512

d2f97a05ad58f8a7a963eab58676b0ffa1642b7082de8653572051edc7bf14efec3e50c368408df6526b8bc68f73eea06e210a6937cddd2eb5d755943b317b0f
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsE:BbdDmjr+OtEvwDpjM8M

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1740-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b00000001223f-16.dat	CryptoLocker_rule2
behavioral1/memory/2340-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1740-13-0x0000000000600000-0x0000000000610000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2340-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral1/memory/1740-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2340-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2340-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1740-8-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b00000001223f-16.dat	UPX
behavioral1/memory/2340-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1740-13-0x0000000000600000-0x0000000000610000-memory.dmp	UPX
behavioral1/memory/2340-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2340	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1740	2024-01-28_6553bd589058f7c804b5f2f59022c7a8_cryptolocker.exe

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 1740 wrote to memory of 2340	1740	2024-01-28_6553bd589058f7c804b5f2f59022c7a8_cryptolocker.exe	14
PID 1740 wrote to memory of 2340	1740	2024-01-28_6553bd589058f7c804b5f2f59022c7a8_cryptolocker.exe	14
PID 1740 wrote to memory of 2340	1740	2024-01-28_6553bd589058f7c804b5f2f59022c7a8_cryptolocker.exe	14
PID 1740 wrote to memory of 2340	1740	2024-01-28_6553bd589058f7c804b5f2f59022c7a8_cryptolocker.exe	14

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
1⤵
- Executes dropped EXE
PID:2340

C:\Users\Admin\AppData\Local\Temp\2024-01-28_6553bd589058f7c804b5f2f59022c7a8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_6553bd589058f7c804b5f2f59022c7a8_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1740

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
61KB

MD5
aff84fad431cf4d15110c4920a38a432

SHA1
1560a50d36589e3302722616912d93bd44606c3c

SHA256
0069f3acde30c9996a1ccb7884524e35e70b445b8aaea0d0e8af7fc225e9de21

SHA512
6abf00cf4101b178242f07037655ddc0ac1bab30877ac66e9c8b140ce107918dc8977f6c0ea1314ceaf066ea9509cd13b9c36d7b4d9a45060abad1dc88d31223

Download Submit
memory/1740-0-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1740-1-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1740-8-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1740-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1740-13-0x0000000000600000-0x0000000000610000-memory.dmp

Filesize
64KB

Download
memory/2340-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2340-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2340-26-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2340-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download