addff22bf83f7cf2f2c7844cdc387a4cd56b0b80555ade6826c2c79f765e0e49

Analysis

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

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
20/02/2024, 11:36

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General

Target

2024-02-20_72aee8a945ba8fc28330b0d674b90b77_cryptolocker.exe
Size

89KB
MD5

72aee8a945ba8fc28330b0d674b90b77
SHA1

3ce61f2dbf228bd7093df9c5d3c652a99afde3b5
SHA256

addff22bf83f7cf2f2c7844cdc387a4cd56b0b80555ade6826c2c79f765e0e49
SHA512

952d14d9639f765019bb97942097e059ca1a9b9b4510bea39978a88955fd91eeef7572e5445da972861d396479c249faa753b93b3489cb77966d5390b7933824
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgdxN:AnBdOOtEvwDpj6z9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2668-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c00000001225c-11.dat	CryptoLocker_rule2
behavioral1/memory/2668-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2080-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2080-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2668-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c00000001225c-11.dat	CryptoLocker_set1
behavioral1/memory/2668-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2080-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2080-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2668-1-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000c00000001225c-11.dat	UPX
behavioral1/memory/2668-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2080-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2080-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2080	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2668	2024-02-20_72aee8a945ba8fc28330b0d674b90b77_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2668-1-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000c00000001225c-11.dat	upx
behavioral1/memory/2668-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2080-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2080-26-0x0000000000500000-0x000000000050F000-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 2668 wrote to memory of 2080	2668	2024-02-20_72aee8a945ba8fc28330b0d674b90b77_cryptolocker.exe	28
PID 2668 wrote to memory of 2080	2668	2024-02-20_72aee8a945ba8fc28330b0d674b90b77_cryptolocker.exe	28
PID 2668 wrote to memory of 2080	2668	2024-02-20_72aee8a945ba8fc28330b0d674b90b77_cryptolocker.exe	28
PID 2668 wrote to memory of 2080	2668	2024-02-20_72aee8a945ba8fc28330b0d674b90b77_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-20_72aee8a945ba8fc28330b0d674b90b77_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-20_72aee8a945ba8fc28330b0d674b90b77_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2668
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2080

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
89KB

MD5
8c498acb110b4877875c17688a6f90a7

SHA1
4cebfc6e8c5ea4da6ba8245ec3014e2fc0016797

SHA256
a1d297d7c7b17b8c1730fce86b207800d444696511514b7b9bac473d3b26a8e9

SHA512
da6f66e653c0d6a3a0096cee227394430eba058351a3a02cad4c653f1c001192c8075321c43883c97ea019158e4bbf3184f3ef8ee8b137c044b098d302a0343c

Download Submit
memory/2080-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2080-18-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2080-20-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2080-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2668-1-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2668-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2668-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2668-3-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2668-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download