e3e10923b4fdffad48da009a0bb0800dbf5510f9cf7c0023b35c8f881ae77513

Analysis

max time kernel
93s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
02/06/2024, 04:34

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General

Target

2024-06-02_7cb0e5c403aad7b9db6efd1703835569_cryptolocker.exe
Size

57KB
MD5

7cb0e5c403aad7b9db6efd1703835569
SHA1

69a3000d6c36898f899d64c8677ce600d214da7c
SHA256

e3e10923b4fdffad48da009a0bb0800dbf5510f9cf7c0023b35c8f881ae77513
SHA512

50547956e9393524f45239d2172589f70da11149873002545049f36818a64f4c7c16328ec4ac94873c8d59757a885ba137ab25a848004175c5597198c9b0457f
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlgzz:bP9g/xtCS3Dxx0nz

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/3636-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023400-13.dat	CryptoLocker_rule2
behavioral2/memory/2268-17-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/3636-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x0009000000023400-13.dat	UPX
behavioral2/memory/2268-17-0x0000000000400000-0x000000000040E000-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-06-02_7cb0e5c403aad7b9db6efd1703835569_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
2268	gewos.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3636-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x0009000000023400-13.dat	upx
behavioral2/memory/2268-17-0x0000000000400000-0x000000000040E000-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 3636 wrote to memory of 2268	3636	2024-06-02_7cb0e5c403aad7b9db6efd1703835569_cryptolocker.exe	85
PID 3636 wrote to memory of 2268	3636	2024-06-02_7cb0e5c403aad7b9db6efd1703835569_cryptolocker.exe	85
PID 3636 wrote to memory of 2268	3636	2024-06-02_7cb0e5c403aad7b9db6efd1703835569_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-06-02_7cb0e5c403aad7b9db6efd1703835569_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-02_7cb0e5c403aad7b9db6efd1703835569_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3636
- 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:2268

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
58KB

MD5
a67a342fd8fb879eeb7f70723584bb21

SHA1
eb9b5ae22eb82dde8c800ae7a132f1cac3555b63

SHA256
8eef06d98793b164d72a1c26e5d97c4bd5ec80d4c66c813ebbb1f768692058d1

SHA512
c0a4ae116b1689c01260a164c5d0757a9fcb8533daa3f88600bf48baef8b7921a08ace2a2901457533d389588a3f110daca4a00c11ece7b6951b248bb6977de1

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

Filesize
185B

MD5
9ae2531573d820656ba8c0ed55f60a71

SHA1
7d5a001b2d3300ff640e389f2a9aa30a13a7557d

SHA256
c340b7c13d9894848078a364274746ae07c62841da48f6c3a259eb92a4307f9d

SHA512
e94e548cee1fda7b8b73442562bb483f55538096a0f51d25d00c4d6dd5841c75529b4a2e5dba73b3963ee1b07ba2297203ef76c7cc2ab74e22b0040b4e3430d3

Download Submit
memory/2268-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2268-27-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/3636-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3636-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/3636-9-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/3636-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download