f2b1e047fdb62f148bb72593ce14a003dee33fa6cba04b18f66f0e85ecd6fc86

Analysis

max time kernel
148s
max time network
151s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
26/03/2024, 06:27

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General

Target

2024-03-26_101622887efedb5dc0c1f86022ec07a9_cryptolocker.exe
Size

100KB
MD5

101622887efedb5dc0c1f86022ec07a9
SHA1

ade51e796bfb6ab3e70d9a2c3421ac3282b6c975
SHA256

f2b1e047fdb62f148bb72593ce14a003dee33fa6cba04b18f66f0e85ecd6fc86
SHA512

3e27a51192895ff08a29958c8ddc7ff133cd0c874d84802eddc524500c45f0ed301ba8ae660b2d848379c9a808651fc93370fb6a911008c20a0c9f931fc24bd5
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviPy/:AnBdOOtEvwDpj6zk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/files/0x000d000000012247-24.dat	CryptoLocker_rule2
behavioral1/memory/2324-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1156-14-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1156-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2324-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/files/0x000d000000012247-24.dat	CryptoLocker_set1
behavioral1/memory/2324-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1156-14-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1156-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2324-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/files/0x000d000000012247-24.dat	UPX
behavioral1/memory/2324-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/1156-14-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/1156-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2324-25-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2324	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1156	2024-03-26_101622887efedb5dc0c1f86022ec07a9_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000d000000012247-24.dat	upx
behavioral1/memory/2324-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/1156-14-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/1156-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2324-25-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 1156 wrote to memory of 2324	1156	2024-03-26_101622887efedb5dc0c1f86022ec07a9_cryptolocker.exe	28
PID 1156 wrote to memory of 2324	1156	2024-03-26_101622887efedb5dc0c1f86022ec07a9_cryptolocker.exe	28
PID 1156 wrote to memory of 2324	1156	2024-03-26_101622887efedb5dc0c1f86022ec07a9_cryptolocker.exe	28
PID 1156 wrote to memory of 2324	1156	2024-03-26_101622887efedb5dc0c1f86022ec07a9_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-26_101622887efedb5dc0c1f86022ec07a9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-26_101622887efedb5dc0c1f86022ec07a9_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1156
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2324

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
100KB

MD5
c67d9fe843c5853a598127d76db6fe75

SHA1
eb015d0b78146a39a38bbef1009ab3e8b291ac73

SHA256
26c2afe2743f464b2d7333047b46a40a5eaf7d219c71fd27a8c3111171c9abd2

SHA512
5aaf4f3de07eb0a4b2daa8df00e3a5e553c92e835ab76c8e51546462ed509b9348e79d83cc666fbabd6dc214b8f14792eec3e4af4f7a5dffd25f9cd7e13e4fa9

Download Submit
memory/1156-14-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1156-5-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1156-2-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/1156-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1156-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2324-18-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2324-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2324-25-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download