26eb20cd31000cf1cf8225496abc1878e9135da247c546b675d1264d1391448e

General

Target

2024-02-04_43183d23a82c3cd940eb68838723bd9f_cryptolocker.exe
Size

66KB
MD5

43183d23a82c3cd940eb68838723bd9f
SHA1

24423329210d8e361d48a48b77d801a500dc65ad
SHA256

26eb20cd31000cf1cf8225496abc1878e9135da247c546b675d1264d1391448e
SHA512

96715a6f9ac18b6e50f570b11668da72527e8e08ef3e0fd237b4c9ac7ea4f407ede32088278230077858086be5a6048505d8ee5288227bd8ff1e06b1768114e0
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaFAvCbDa6r:z6a+CdOOtEvwDpjQHr

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1604-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a00000001225a-11.dat	CryptoLocker_rule2
behavioral1/memory/1604-15-0x00000000026C0000-0x00000000026D0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1604-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2452-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2452-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/1604-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a00000001225a-11.dat	CryptoLocker_set1
behavioral1/memory/1604-15-0x00000000026C0000-0x00000000026D0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1604-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2452-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2452-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1604-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000a00000001225a-11.dat	UPX
behavioral1/memory/1604-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2452-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2452-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2452	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1604	2024-02-04_43183d23a82c3cd940eb68838723bd9f_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1604-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000a00000001225a-11.dat	upx
behavioral1/memory/1604-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2452-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2452-28-0x0000000000500000-0x0000000000510000-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 1604 wrote to memory of 2452	1604	2024-02-04_43183d23a82c3cd940eb68838723bd9f_cryptolocker.exe	28
PID 1604 wrote to memory of 2452	1604	2024-02-04_43183d23a82c3cd940eb68838723bd9f_cryptolocker.exe	28
PID 1604 wrote to memory of 2452	1604	2024-02-04_43183d23a82c3cd940eb68838723bd9f_cryptolocker.exe	28
PID 1604 wrote to memory of 2452	1604	2024-02-04_43183d23a82c3cd940eb68838723bd9f_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-04_43183d23a82c3cd940eb68838723bd9f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_43183d23a82c3cd940eb68838723bd9f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1604
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2452

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
66KB

MD5
d4acbadb54d322974956d6ba28b1eb7a

SHA1
966992ede3ffb6e1651a2af87e3a64f9584849e9

SHA256
d36c917405d084e78359318b2ceb43f73f76d7fb884a220fd597e8b2fbd549d3

SHA512
82f38fb4a0eb205074ca190f2d63f6bd26ef218802b7ea2150b840d72d810dda925e0c35add4cac0b365ae220cc7b917a3c6ce6b20ff2e03e8b67980b16685da

Download Submit
memory/1604-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1604-1-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/1604-3-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/1604-2-0x0000000000450000-0x0000000000456000-memory.dmp

Filesize
24KB

Download
memory/1604-15-0x00000000026C0000-0x00000000026D0000-memory.dmp

Filesize
64KB

Download
memory/1604-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1604-27-0x00000000026C0000-0x00000000026D0000-memory.dmp

Filesize
64KB

Download
memory/2452-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2452-19-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2452-22-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2452-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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