4006faa00871b765909871f010c0aaae234463d8c91732375c5d18391afb6ea6

Analysis

max time kernel
149s
max time network
152s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15-04-2024 09:31

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General

Target

2024-04-15_1c0137b78391abadb9761c040b566331_cryptolocker.exe
Size

62KB
MD5

1c0137b78391abadb9761c040b566331
SHA1

0e4e2991d72a83ef76f5ec901f6d02b87ba92716
SHA256

4006faa00871b765909871f010c0aaae234463d8c91732375c5d18391afb6ea6
SHA512

208f790a72beeedaabdbf1f99d63f9a6e4b546a569123e8bbccb144da5f4f0a0ae03e07d9261a23b2d5f0608fe3a85709d624223bd731d1b610c7cd3bf41b6ff
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiP:BbdDmjr+OtEvwDpjM8a

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2364-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c0000000122c3-11.dat	CryptoLocker_rule2
behavioral1/memory/2364-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1640-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1640-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral1/memory/2364-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1640-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1640-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2364-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c0000000122c3-11.dat	UPX
behavioral1/memory/2364-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1640-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1640-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1640	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2364	2024-04-15_1c0137b78391abadb9761c040b566331_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 2364 wrote to memory of 1640	2364	2024-04-15_1c0137b78391abadb9761c040b566331_cryptolocker.exe	28
PID 2364 wrote to memory of 1640	2364	2024-04-15_1c0137b78391abadb9761c040b566331_cryptolocker.exe	28
PID 2364 wrote to memory of 1640	2364	2024-04-15_1c0137b78391abadb9761c040b566331_cryptolocker.exe	28
PID 2364 wrote to memory of 1640	2364	2024-04-15_1c0137b78391abadb9761c040b566331_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-15_1c0137b78391abadb9761c040b566331_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_1c0137b78391abadb9761c040b566331_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2364
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1640

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

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Downloads

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

Filesize
62KB

MD5
eb405c7876e29bd9c443402054d4fb6b

SHA1
403cc56cb9f4430606f5c89e952123252e453e4d

SHA256
9f4ed5f15034fb3bea7d950e31f5347ed94db387333f19dc43611ac825a97783

SHA512
534c9e320a5bb55c89083f800eb5deaa1989388564d32fa15a958785fcbdaed64d1496792d9fa175fb10bacdd555e9f983a6ac8e724d27039fbf39d8c6676aa7

Download Submit
memory/1640-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1640-19-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/1640-18-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1640-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2364-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2364-1-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2364-2-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download
memory/2364-8-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2364-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download