34a4ee41f5a7b007f8a5f4002f88655c6e4ddf0a76f5885f0b6b84fc308bfd11

Analysis

max time kernel
140s
max time network
139s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
20-04-2024 04:44

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General

Target

2024-04-20_a9bb6b7a6a12538f0adae3415231a713_cryptolocker.exe
Size

49KB
MD5

a9bb6b7a6a12538f0adae3415231a713
SHA1

b05411512bb4d34d249d801a913fce46ad4f8dd0
SHA256

34a4ee41f5a7b007f8a5f4002f88655c6e4ddf0a76f5885f0b6b84fc308bfd11
SHA512

0e602657f9391244d0494bbc7c3e3382e2377343cbce53265826934602393d5746da470316156d0f9d5e2882cfd6a269341ba637ad77b5267d4939a7a875451f
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mocbx:qmbhXDmjr5MOtEvwDpj5cDtKkQZQY

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2940-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000012255-11.dat	CryptoLocker_rule2
behavioral1/memory/2940-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2356-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2356-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral1/memory/2940-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2356-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2356-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2940-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000a000000012255-11.dat	UPX
behavioral1/memory/2940-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2356-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2356-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2356	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2940	2024-04-20_a9bb6b7a6a12538f0adae3415231a713_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 2940 wrote to memory of 2356	2940	2024-04-20_a9bb6b7a6a12538f0adae3415231a713_cryptolocker.exe	28
PID 2940 wrote to memory of 2356	2940	2024-04-20_a9bb6b7a6a12538f0adae3415231a713_cryptolocker.exe	28
PID 2940 wrote to memory of 2356	2940	2024-04-20_a9bb6b7a6a12538f0adae3415231a713_cryptolocker.exe	28
PID 2940 wrote to memory of 2356	2940	2024-04-20_a9bb6b7a6a12538f0adae3415231a713_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-20_a9bb6b7a6a12538f0adae3415231a713_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_a9bb6b7a6a12538f0adae3415231a713_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2940
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2356

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
49KB

MD5
c92cfb91e2003e4f8f4089b05f3b7642

SHA1
38d1f763f5d6af920a06770f169ced7c6ab76b38

SHA256
54259d084ad7e1647765cdce532590d8d771ee5ccaab02c07d53f7533a0d5177

SHA512
1752f2987943d216d3440d3ca9b82b09ce53eac18e93b7a50609228b3d30841986cc00e5e122b64ae896034fe7f44f056d631898402a6ac2732ca4cc18b7b397

Download Submit
memory/2356-18-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2356-20-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2356-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2356-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2940-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2940-1-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/2940-3-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2940-2-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/2940-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download