6690dd2eb4f3a3bedf7e71b71f1d633f12c63ff4f7d648cfa00e564aac9c5a02

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 05:56

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General

Target

2024-02-12_9e104fdc42e80948f855d7985660be4f_cryptolocker.exe
Size

33KB
MD5

9e104fdc42e80948f855d7985660be4f
SHA1

f49ba74a25f23357fa90f6afdd51e60dd9c2c897
SHA256

6690dd2eb4f3a3bedf7e71b71f1d633f12c63ff4f7d648cfa00e564aac9c5a02
SHA512

db8c51fc28ed19e1fedb5ab5ce5aecec3ecf0b854ebbdee798cfeaae7713e4081ed805a6454f8519c52a5ae38bb2b4c62c89410c936ddd2b329059182b4947fb
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5axW:qUmnpomddpMOtEvwDpjjaYas

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4644-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023238-13.dat	CryptoLocker_rule2
behavioral2/memory/4644-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3288-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4644-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000023238-13.dat	CryptoLocker_set1
behavioral2/memory/4644-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3288-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4644-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0006000000023238-13.dat	UPX
behavioral2/memory/4644-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3288-26-0x0000000000500000-0x000000000050F000-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-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	2024-02-12_9e104fdc42e80948f855d7985660be4f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3288	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4644-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0006000000023238-13.dat	upx
behavioral2/memory/4644-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3288-26-0x0000000000500000-0x000000000050F000-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 4644 wrote to memory of 3288	4644	2024-02-12_9e104fdc42e80948f855d7985660be4f_cryptolocker.exe	83
PID 4644 wrote to memory of 3288	4644	2024-02-12_9e104fdc42e80948f855d7985660be4f_cryptolocker.exe	83
PID 4644 wrote to memory of 3288	4644	2024-02-12_9e104fdc42e80948f855d7985660be4f_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-12_9e104fdc42e80948f855d7985660be4f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_9e104fdc42e80948f855d7985660be4f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4644
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3288

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
33KB

MD5
a8bc7f09bc97f91fb7ee33e5e75da0c0

SHA1
e6f9195b29d04ad983f42b288e5bace03a87367b

SHA256
de93bdf408b6d9937b22217550e83e1c2699784210f52363f709f3456247122a

SHA512
c82d3db946a4d981faae4f6d3f5bcc336421e1c640bb9fc8097a61957f320921194f9e7caa172d0011f7d9b5f3843d94ada479ee3aff98974da75a5c76867b46

Download Submit
memory/3288-19-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

Filesize
24KB

Download
memory/3288-25-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

Filesize
24KB

Download
memory/3288-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4644-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4644-1-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/4644-2-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/4644-3-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/4644-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download