73f59326ba3935dfe37b0e00beeac0f21d952afd441f3604973cc574ba227de1

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
30/04/2024, 02:52

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General

Target

2024-04-30_9ddd3e3161e4242082410e912fd28df0_cryptolocker.exe
Size

60KB
MD5

9ddd3e3161e4242082410e912fd28df0
SHA1

c78cb187408b0cfb68c47baa8a8744521415cb85
SHA256

73f59326ba3935dfe37b0e00beeac0f21d952afd441f3604973cc574ba227de1
SHA512

df7660effabb4bd45219add5860eb5fcc24ba785134d957fbc623d478fcdcad37878f732a44923f29e92912e3702e189463514ec138323c0caef4923c009630e
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5app6:z6QFElP6n+gKmddpMOtEvwDpj9aYaq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4912-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023298-13.dat	CryptoLocker_rule2
behavioral2/memory/4256-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4912-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4256-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4912-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023298-13.dat	CryptoLocker_set1
behavioral2/memory/4256-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4912-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4256-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4912-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023298-13.dat	UPX
behavioral2/memory/4256-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4912-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4256-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-04-30_9ddd3e3161e4242082410e912fd28df0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4256	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4912-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023298-13.dat	upx
behavioral2/memory/4256-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4912-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4256-27-0x0000000000500000-0x0000000000510000-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 4912 wrote to memory of 4256	4912	2024-04-30_9ddd3e3161e4242082410e912fd28df0_cryptolocker.exe	83
PID 4912 wrote to memory of 4256	4912	2024-04-30_9ddd3e3161e4242082410e912fd28df0_cryptolocker.exe	83
PID 4912 wrote to memory of 4256	4912	2024-04-30_9ddd3e3161e4242082410e912fd28df0_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-30_9ddd3e3161e4242082410e912fd28df0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_9ddd3e3161e4242082410e912fd28df0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4912
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4256

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
60KB

MD5
9fa6fc3a2ed81476de71ea41c00cb137

SHA1
0259bff70a8c3d195cbbd33656c834896a762061

SHA256
da078cbb24807e5051ba77978ce6ed7cbcfbaff2764356c6f1b6172e1e6a04f5

SHA512
60cc56d1e0563b7bb0f41ffbc07a1eb928665f4809fbdc296682be1a2b5d7d934a909f2e5da7adf3a13707f2d51621f47532d79b04030649da282616debdb199

Download Submit
memory/4256-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4256-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4256-26-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4256-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4912-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4912-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4912-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4912-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4912-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download