d196f7ba2a489a6f583d172069646609c59c6498280977e40ef62617207a27e0

Analysis

max time kernel
93s
max time network
113s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
16/04/2024, 08:37

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General

Target

2024-04-16_84e620a043ad434d441d0b6f7f947b02_cryptolocker.exe
Size

54KB
MD5

84e620a043ad434d441d0b6f7f947b02
SHA1

b39728ffa6fe9991f74c8dd692e12fc5e6dc537c
SHA256

d196f7ba2a489a6f583d172069646609c59c6498280977e40ef62617207a27e0
SHA512

c9090a96bfab97173ccf62cfb975b92a825596fcb353e29eb7fbb45be83f3ae095bf07a5eb556d96e917ab205501748a1581aa136fe41ced283d59c8d0847d37
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgULe:bP9g/xtCS3Dxx0T

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/3572-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_rule2
behavioral2/memory/2464-19-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/3572-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x001c00000001e97e-13.dat	UPX
behavioral2/memory/2464-19-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Checks computer location settings 2 TTPs 2 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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	gewos.exe
Key value queried	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	2024-04-16_84e620a043ad434d441d0b6f7f947b02_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2464	gewos.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3572-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x001c00000001e97e-13.dat	upx
behavioral2/memory/2464-19-0x0000000000400000-0x000000000040E000-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 3572 wrote to memory of 2464	3572	2024-04-16_84e620a043ad434d441d0b6f7f947b02_cryptolocker.exe	88
PID 3572 wrote to memory of 2464	3572	2024-04-16_84e620a043ad434d441d0b6f7f947b02_cryptolocker.exe	88
PID 3572 wrote to memory of 2464	3572	2024-04-16_84e620a043ad434d441d0b6f7f947b02_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-04-16_84e620a043ad434d441d0b6f7f947b02_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-16_84e620a043ad434d441d0b6f7f947b02_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3572
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:2464

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\gewos.exe

Filesize
54KB

MD5
b460cf49d7f800839cb5d454ab5f5d6f

SHA1
9bb26fc599bf9fc609379b77d929fab40716b8f3

SHA256
f91199604683e804c824c1dc5b56e6f987c583d9c4701dda84cb0b5a4bc5bd06

SHA512
0f0aa113f3ff6350c861f940b7b2cb9266407fd7fff920732a2cd29bee3e6b39c707a2ce71f52b32a6162310f02af0d5fdc5d45d9d2775b8825a7f328c26c972

Download Submit
memory/2464-19-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2464-27-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3572-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3572-1-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/3572-2-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/3572-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download