35bb92a252f5572800db00e8182e5b2c7e241fb3b8e6233f4d3084ea42ecb117

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 05:21

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General

Target

2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe
Size

114KB
MD5

ed31749da19614babd662e6e91eb713f
SHA1

b126c3d45c8dd3dca47189246bef6cdae1d82b35
SHA256

35bb92a252f5572800db00e8182e5b2c7e241fb3b8e6233f4d3084ea42ecb117
SHA512

1d6c263bc171f543f0810505e8215b3c4a027bc75a65acedd42818dd7d1dc7e91f2c17f16aec2580a40e8003b3bda0f870740444369f989d1e642c951c8b4297
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01M:z6a+CdOOtEvwDpjcza

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3252-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001000000002315e-13.dat	CryptoLocker_rule2
behavioral2/memory/3252-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3468-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3252-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x001000000002315e-13.dat	CryptoLocker_set1
behavioral2/memory/3252-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3468-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3252-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x001000000002315e-13.dat	UPX
behavioral2/memory/3252-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3468-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3468	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3252-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x001000000002315e-13.dat	upx
behavioral2/memory/3252-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3468-26-0x0000000000500000-0x0000000000510000-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 3252 wrote to memory of 3468	3252	2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe	85
PID 3252 wrote to memory of 3468	3252	2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe	85
PID 3252 wrote to memory of 3468	3252	2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3252
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3468

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
a55d6bb0cab213982d7ea8e67a022944

SHA1
2162e6a6bf09e603a450e4fdd9d09681a9b6ecb2

SHA256
8054681f596e7ed18a3044a3fcdb33bb052fe75b60eeec46bdb4b78e9d21a422

SHA512
6cb40febe205a472c753fbc873c5e2693090b705805bf430a11639c4960a91526a45250a730ef713588f936775cbbb2c20eb6a83d1c19dee8b3ef4e8ddefc5e4

Download Submit
memory/3252-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3252-1-0x0000000000690000-0x0000000000696000-memory.dmp

Filesize
24KB

Download
memory/3252-2-0x0000000000690000-0x0000000000696000-memory.dmp

Filesize
24KB

Download
memory/3252-3-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3252-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3468-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3468-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3468-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download