03ba8637eff0e525a6d7b0f56e5523fac3d62820e273422e7358c33c180104bd

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
08/04/2024, 22:33

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General

Target

2024-04-08_4ff20115fcea58f42add40dda3ac94fd_cryptolocker.exe
Size

59KB
MD5

4ff20115fcea58f42add40dda3ac94fd
SHA1

557647d50531222849b5d4fa6fa3199ac7eacfe9
SHA256

03ba8637eff0e525a6d7b0f56e5523fac3d62820e273422e7358c33c180104bd
SHA512

c5e93d19d3ba2ddbcc18d5cae57b84cb46b0965989935484fb9874f07bc5a5320571ebdde50a7deebb4bd0428f9501c94ebeff137b8a1cd04fca035db74fe460
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5appOtu:z6QFElP6n+gKmddpMOtEvwDpj9aYaj

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2344-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b000000023161-13.dat	CryptoLocker_rule2
behavioral2/memory/2344-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3748-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2344-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000b000000023161-13.dat	CryptoLocker_set1
behavioral2/memory/2344-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3748-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2344-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000b000000023161-13.dat	UPX
behavioral2/memory/2344-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3748-26-0x0000000000500000-0x0000000000510000-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	2024-04-08_4ff20115fcea58f42add40dda3ac94fd_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3748	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2344-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000b000000023161-13.dat	upx
behavioral2/memory/2344-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3748-26-0x0000000000500000-0x0000000000510000-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 2344 wrote to memory of 3748	2344	2024-04-08_4ff20115fcea58f42add40dda3ac94fd_cryptolocker.exe	84
PID 2344 wrote to memory of 3748	2344	2024-04-08_4ff20115fcea58f42add40dda3ac94fd_cryptolocker.exe	84
PID 2344 wrote to memory of 3748	2344	2024-04-08_4ff20115fcea58f42add40dda3ac94fd_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-08_4ff20115fcea58f42add40dda3ac94fd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-08_4ff20115fcea58f42add40dda3ac94fd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2344
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3748

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
59KB

MD5
408f71f4d090608cb75aa3162081c44f

SHA1
e75bf60b4634b1346faff9111128f02372cde26e

SHA256
a10ad50c19b84821ef3aacb52dd9d1a2931a6c4d0915b3e69564ae3ae1c736ec

SHA512
7b1f15fe8bd641090a448138d3cdfb45f4a828d5398903e2356c8cf04def96044a7fbb3fbfd7c40a34c1eab33bae9606a5ab177bd9e274c35237fd1f9be3c944

Download Submit
memory/2344-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2344-1-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/2344-2-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/2344-3-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/2344-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3748-19-0x0000000001F30000-0x0000000001F36000-memory.dmp

Filesize
24KB

Download
memory/3748-25-0x0000000001F10000-0x0000000001F16000-memory.dmp

Filesize
24KB

Download
memory/3748-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download