2c0c57eae20dbafc6b9fa84217cda1d6282da9d1a3517092342ceb6926714cd4

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06/04/2024, 03:48

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General

Target

2024-04-06_6076dc9fadc6a328fae7e070a82d9e64_cryptolocker.exe
Size

62KB
MD5

6076dc9fadc6a328fae7e070a82d9e64
SHA1

2bd810343883e35901ceff6ccdc1724b9fecca65
SHA256

2c0c57eae20dbafc6b9fa84217cda1d6282da9d1a3517092342ceb6926714cd4
SHA512

aab62d9505a70164f31620c11c2c1eaba5bc8316cd520afa65626073d5e9782e49d5676db310b687e32e947940d0228db06bb8c80f455d19cbeb53867847d3d8
SSDEEP

768:P8mnjO6LsoEEeegiZPvEhHSG+gbum/kLyMro2GtOOtEvwDpjKvWxHCbSVaFn0jKG:P8mnK6QFElP6n+gymddpMOtEvwDpjY8

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/184-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b00000002320a-13.dat	CryptoLocker_rule2
behavioral2/memory/184-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4988-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/184-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000b00000002320a-13.dat	CryptoLocker_set1
behavioral2/memory/184-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4988-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/184-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000b00000002320a-13.dat	UPX
behavioral2/memory/184-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4988-26-0x0000000000500000-0x000000000050F311-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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	2024-04-06_6076dc9fadc6a328fae7e070a82d9e64_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4988	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/184-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000b00000002320a-13.dat	upx
behavioral2/memory/184-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4988-26-0x0000000000500000-0x000000000050F311-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 184 wrote to memory of 4988	184	2024-04-06_6076dc9fadc6a328fae7e070a82d9e64_cryptolocker.exe	88
PID 184 wrote to memory of 4988	184	2024-04-06_6076dc9fadc6a328fae7e070a82d9e64_cryptolocker.exe	88
PID 184 wrote to memory of 4988	184	2024-04-06_6076dc9fadc6a328fae7e070a82d9e64_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-04-06_6076dc9fadc6a328fae7e070a82d9e64_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-06_6076dc9fadc6a328fae7e070a82d9e64_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:184
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4988

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
63KB

MD5
0888ddc120b7ae87068325348da0082a

SHA1
520bcf9f1dec62e68de8baf1f0e8d961ec13198d

SHA256
18b3909990399bfe59e84285f29327f623994a95920c9f422cb2da6771f1604e

SHA512
0c8e77f5fea347cc26a58f0dd3caadaebf60dac2866fe7146c8a0d5ddae1f2d4cf74f2582b4def0fe079a2ac1e24d2b0073470b4c05b3705b8b130a658970a97

Download Submit
memory/184-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/184-1-0x0000000002300000-0x0000000002306000-memory.dmp

Filesize
24KB

Download
memory/184-2-0x0000000002300000-0x0000000002306000-memory.dmp

Filesize
24KB

Download
memory/184-3-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/184-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4988-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/4988-25-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4988-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download