71e5377e6b5a8d673f6da3b73f9241c24c24fe508a6aab81e96a845027507194

Analysis

max time kernel
138s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25/01/2024, 14:36

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General

Target

2024-01-25_599186367122c5efcf79fac473b30f4f_cryptolocker.exe
Size

70KB
MD5

599186367122c5efcf79fac473b30f4f
SHA1

fe1e1079ff4ecf63617d57c927ef96dcd9971326
SHA256

71e5377e6b5a8d673f6da3b73f9241c24c24fe508a6aab81e96a845027507194
SHA512

3b2591834d848c42b569ad5f25c51785739a603c287fb19bd180d8fa7e056ad3dcdcc45104f45d8469b4b752750af9ca1ac0c44cdbac5931ed6fceda8460812f
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalp:1nK6a+qdOOtEvwDpjI

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3976-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000022480-13.dat	CryptoLocker_rule2
behavioral2/memory/3976-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2588-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3976-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000022480-13.dat	CryptoLocker_set1
behavioral2/memory/3976-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2588-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3976-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0009000000022480-13.dat	UPX
behavioral2/memory/3976-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2588-25-0x0000000000500000-0x000000000050F311-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-01-25_599186367122c5efcf79fac473b30f4f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2588	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3976-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0009000000022480-13.dat	upx
behavioral2/memory/3976-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2588-25-0x0000000000500000-0x000000000050F311-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 3976 wrote to memory of 2588	3976	2024-01-25_599186367122c5efcf79fac473b30f4f_cryptolocker.exe	89
PID 3976 wrote to memory of 2588	3976	2024-01-25_599186367122c5efcf79fac473b30f4f_cryptolocker.exe	89
PID 3976 wrote to memory of 2588	3976	2024-01-25_599186367122c5efcf79fac473b30f4f_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-01-25_599186367122c5efcf79fac473b30f4f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_599186367122c5efcf79fac473b30f4f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3976
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2588

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
70KB

MD5
20afa7d530ee79e6df00cc9bc5cb839c

SHA1
43bf7cb6c437341cf1b8a365b08784e35fbfb10a

SHA256
391a8c7fe378676912c43c67bf0d6eefae3428d5dc84a6e26b63732e38276e9e

SHA512
0c4e8904152e2546bb46609ae703f3244e2eb2b9692373d6a971088ffb8ab7b830b0d3ff3fa3ed104d3732fa90b0c12d81bc87841da2df0a9e603a75560260b4

Download Submit
memory/2588-25-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3976-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3976-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3976-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3976-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3976-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download