12d132c7253f96e4342555872b8d6267b5e79217fcb45d2c452ac17ddd7b5766

Analysis

max time kernel
148s
max time network
152s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
20/03/2024, 00:27

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General

Target

2024-03-20_18fb9c687eb96fe322d98b8cf494aedf_cryptolocker.exe
Size

87KB
MD5

18fb9c687eb96fe322d98b8cf494aedf
SHA1

538a7483c388f971ad88365e0155ee4acfc32207
SHA256

12d132c7253f96e4342555872b8d6267b5e79217fcb45d2c452ac17ddd7b5766
SHA512

3e548a287083d9d8ffcec2bb10789ae19300cf7719140cf6683ee3b7e2257827f0429d8a748aa7bf3c3083049a87d12770c984458b3cca72f7351c925ddf1601
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtISEz:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000013a88-11.dat	CryptoLocker_rule2
behavioral1/memory/2196-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2480-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2480-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000013a88-11.dat	CryptoLocker_set1
behavioral1/memory/2196-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2480-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2480-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000b000000013a88-11.dat	UPX
behavioral1/memory/2196-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2480-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2480-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2480	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2196	2024-03-20_18fb9c687eb96fe322d98b8cf494aedf_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000b000000013a88-11.dat	upx
behavioral1/memory/2196-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2480-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2480-26-0x0000000000500000-0x000000000050F000-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 2196 wrote to memory of 2480	2196	2024-03-20_18fb9c687eb96fe322d98b8cf494aedf_cryptolocker.exe	28
PID 2196 wrote to memory of 2480	2196	2024-03-20_18fb9c687eb96fe322d98b8cf494aedf_cryptolocker.exe	28
PID 2196 wrote to memory of 2480	2196	2024-03-20_18fb9c687eb96fe322d98b8cf494aedf_cryptolocker.exe	28
PID 2196 wrote to memory of 2480	2196	2024-03-20_18fb9c687eb96fe322d98b8cf494aedf_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-20_18fb9c687eb96fe322d98b8cf494aedf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-20_18fb9c687eb96fe322d98b8cf494aedf_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2196
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2480

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
87KB

MD5
0218e43691ff3f285c8cc08b6199a5f3

SHA1
dc0d3f9e8fafbe5ae6482f2026d69857e54a0f14

SHA256
75be8e2cbf7b0de79d11ca164181d2f281340559d24653d3b914f8b52dfc0e25

SHA512
1311c92693a702f465335fa4f8b29d63d2c3285468e65971281440f2afeb1db34d560c28615b3f1a1f73c147747e8143ad6a9088e687942a2ec2aca495179179

Download Submit
memory/2196-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2196-3-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2196-2-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2196-1-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2196-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2480-18-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2480-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2480-19-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2480-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download