835962b49b56b8d83e08f3ef1eac22ecc2894e089b71c6c547b5f12f3feccbb4

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29/05/2024, 04:52

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General

Target

2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe
Size

39KB
MD5

70bf58577fee487a9e8b4a585adc799b
SHA1

e12eb418aae174314aa5954de64d2b1887854afe
SHA256

835962b49b56b8d83e08f3ef1eac22ecc2894e089b71c6c547b5f12f3feccbb4
SHA512

b6e08ba0ae85d7ba7e3f616693faacca048643bbdb40491595f4ffa0c766596b249f227f2727828fd92b76b99c5491f1a1a2fa548678bf4983a299635f7b4656
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/s:qDdFJy3QMOtEvwDpjjWMl7T5

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2060-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023276-13.dat	CryptoLocker_rule2
behavioral2/memory/3292-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2060-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3292-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/2060-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000023276-13.dat	CryptoLocker_set1
behavioral2/memory/3292-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2060-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3292-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2060-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0006000000023276-13.dat	UPX
behavioral2/memory/3292-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2060-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3292-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3292	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2060-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0006000000023276-13.dat	upx
behavioral2/memory/3292-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2060-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3292-28-0x0000000000500000-0x0000000000510000-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 3 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 3292	2060	2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe	82
PID 2060 wrote to memory of 3292	2060	2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe	82
PID 2060 wrote to memory of 3292	2060	2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2060
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3292

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

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
40KB

MD5
7767ea9ec187893f96a01d6c43fef1dd

SHA1
30d85b2177eaf8fe53b221b26910cd418465f184

SHA256
19d72afadb85210c1f4873df6ac6cc7816d2df892efc9326f9681cc2dbc07e3b

SHA512
c35633c4129437d4825e31e5975d2371524e2e0985f259680bf5245eebf36997b8bff057716ea63b286e98a58f89973f7bf364d6daed39fc77665b2ec1c4af72

Download Submit
memory/2060-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2060-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2060-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/2060-9-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2060-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3292-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3292-21-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3292-27-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3292-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download