fb9d22734373dee308c065f0a52ad911f486c34e47756ec38c5f64c44ce3fdb4

Analysis

max time kernel
117s
max time network
175s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19-04-2024 08:27

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General

Target

2024-04-19_60f2a54aaf3e471526e02d01f8a0d802_cryptolocker.exe
Size

55KB
MD5

60f2a54aaf3e471526e02d01f8a0d802
SHA1

f8b0f4e9c956f095efc1c4fd8b73ba2b33a39811
SHA256

fb9d22734373dee308c065f0a52ad911f486c34e47756ec38c5f64c44ce3fdb4
SHA512

63d0f7cf23767e5af7d170307a0c650d3c872bde775fca3ad00f73471e0f34d8311ec0e71784b38093d22ff4d98f67ab942695977fcfa9207a47f8980b4299c8
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlN:bP9g/xtCS3Dxx0K

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral2/memory/564-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000016898-13.dat	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral2/memory/564-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x000c000000016898-13.dat	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-1-5-21-1230272463-3683322193-511842230-1000\Control Panel\International\Geo\Nation	2024-04-19_60f2a54aaf3e471526e02d01f8a0d802_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1230272463-3683322193-511842230-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
3000	gewos.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/564-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x000c000000016898-13.dat	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 564 wrote to memory of 3000	564	2024-04-19_60f2a54aaf3e471526e02d01f8a0d802_cryptolocker.exe	90
PID 564 wrote to memory of 3000	564	2024-04-19_60f2a54aaf3e471526e02d01f8a0d802_cryptolocker.exe	90
PID 564 wrote to memory of 3000	564	2024-04-19_60f2a54aaf3e471526e02d01f8a0d802_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-04-19_60f2a54aaf3e471526e02d01f8a0d802_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-19_60f2a54aaf3e471526e02d01f8a0d802_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:564
- 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:3000

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
55KB

MD5
3473fefa1af5bba7fdfc1d0a883d9213

SHA1
b9f6fb0887bb21e786c21507f9e38be9b1af934e

SHA256
f6fd3b73afdee3078191eb6320a10424597dd1c9c78f4d6fe89844bd4a598f3b

SHA512
773039ae13af5310dd5accb3c69f0935ce59ecd98630a720f3ecdb7bce5a612399fb3f7bee2e495e14594ca29f17854670c7752d97cb5df77bdefbc624f958ba

Download Submit
memory/564-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/564-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/564-2-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/564-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3000-20-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download