fbb3c2808cd24c8c694775b556fb89abce93cc2f21fba37a43bc06417b70d1e5

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/01/2024, 09:59

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General

Target

2024-01-19_192ebbc4d44e5b4857359cd32e303511_cryptolocker.exe
Size

115KB
MD5

192ebbc4d44e5b4857359cd32e303511
SHA1

70a674d1106c83fef7d71c39cf20b5bc56dca428
SHA256

fbb3c2808cd24c8c694775b556fb89abce93cc2f21fba37a43bc06417b70d1e5
SHA512

6cc27fa6834452b16fc55d2ca201e37fc8169bdefe9178c4abc461e48f49bc6b0d8ed9fb0b0d8690772d7832b7b26f43d585f98272928d5e269e079e09663330
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjCGYQbN/PKwNgerar/P:T6a+rdOOtEvwDpjLzq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4548-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023170-13.dat	CryptoLocker_rule2
behavioral2/memory/4548-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3068-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4548-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023170-13.dat	CryptoLocker_set1
behavioral2/memory/4548-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3068-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4548-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c000000023170-13.dat	UPX
behavioral2/memory/4548-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3068-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-01-19_192ebbc4d44e5b4857359cd32e303511_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3068	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4548-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c000000023170-13.dat	upx
behavioral2/memory/4548-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3068-26-0x0000000000500000-0x0000000000510000-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 4548 wrote to memory of 3068	4548	2024-01-19_192ebbc4d44e5b4857359cd32e303511_cryptolocker.exe	89
PID 4548 wrote to memory of 3068	4548	2024-01-19_192ebbc4d44e5b4857359cd32e303511_cryptolocker.exe	89
PID 4548 wrote to memory of 3068	4548	2024-01-19_192ebbc4d44e5b4857359cd32e303511_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-01-19_192ebbc4d44e5b4857359cd32e303511_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-19_192ebbc4d44e5b4857359cd32e303511_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4548
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3068

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
115KB

MD5
89663877abe5b4246b498d7f2feeccce

SHA1
e856c99db49e9883ee9139aa6f73c7e7e81ff615

SHA256
263d59a3b56472b9063d3d6579566f6585727349f002d52f107a01df150b6399

SHA512
9af047db0fb5322decb718752b56f3e1229d4ce8ec70be0fba62a3a85efe7430198bea5fe6774cc82e4a0d4144e0e99df8d439689fd62b21c3b15151fd9fed44

Download Submit
memory/3068-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3068-25-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3068-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4548-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4548-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4548-3-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4548-2-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4548-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download