b45396e0b6ab277e2313d53291a3ab0a574ab0a183f8727650d423e8cf6d7b78

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
14/05/2024, 05:22

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General

Target

2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe
Size

56KB
MD5

0931e1c97e2e0b95047f5a780e5a2e4f
SHA1

9f859acfa78232415b7a1b589e27744126c2ae2f
SHA256

b45396e0b6ab277e2313d53291a3ab0a574ab0a183f8727650d423e8cf6d7b78
SHA512

13f86f0e2c6abdee741ff234c18d24d6d48d1493f37c235f1fe0fff0f766c8bb452a2c2c3551893e6585e0e9dbde09738c18c82532a7242dddb540688f79717e
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlYRM:bP9g/xtCS3Dxx0Lm

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/2840-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023383-13.dat	CryptoLocker_rule2
behavioral2/memory/3052-19-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/2840-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x000d000000023383-13.dat	UPX
behavioral2/memory/3052-19-0x0000000000400000-0x000000000040E000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
3052	gewos.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2840-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x000d000000023383-13.dat	upx
behavioral2/memory/3052-19-0x0000000000400000-0x000000000040E000-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 2840 wrote to memory of 3052	2840	2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe	84
PID 2840 wrote to memory of 3052	2840	2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe	84
PID 2840 wrote to memory of 3052	2840	2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2840
- 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:3052

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
56KB

MD5
8812d43b9c83b939ca37fc6085fbfbf1

SHA1
62c2ee332fb864f16437f6593241495feba2ae30

SHA256
a0626cbd0b274701acb17940925cdaeb8fdc79aa887d5269b5773bbeaa974804

SHA512
8697922e25e34850e50fd2b32acd40ca1b66d104a6481ed7ec346da58b1b33402d9f9e7fa367009d2d212036522eadcbca835101b3962e872b71a522d77abc14

Download Submit
C:\Users\Admin\AppData\Local\Temp\gewosik.exe

Filesize
185B

MD5
e048fe178e12dce5e3547723c6973529

SHA1
1a42e1e72f87b820f50d0b0af2209279d0196365

SHA256
897018ea02eb46681023900c145fbceeae63acf45b370e448842e6198caa88c4

SHA512
8965eb6c9fce284af17de43a0d3dbd05fa0044b5ea5318fdcc3841776b1393d953ac3abc091375291f340e551bc22d499823278003c6426889fa69aa2cafdd81

Download Submit
memory/2840-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2840-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2840-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2840-2-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3052-19-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download