202c45c0077ae11a8daad8dcd355d590d8366ed8ccd88d10ff0042f0e16f44cd

Analysis

max time kernel
134s
max time network
125s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
17/05/2024, 05:47

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General

Target

2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe
Size

57KB
MD5

89afe568d8c0080d8348c4608e617e72
SHA1

127fa64faf7177447e2e8fe13d3c97eaa52ac678
SHA256

202c45c0077ae11a8daad8dcd355d590d8366ed8ccd88d10ff0042f0e16f44cd
SHA512

2ddf365233d63a56875a14e29e50f4e328951fc4c0cf4e3893f5eb10a1e1b8408c77e20baa977d1b6664eccd253821ee2672204c63119851634eeabe00fee30d
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlgzM:bP9g/xtCS3Dxx0nM

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/1028-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023298-13.dat	CryptoLocker_rule2
behavioral2/memory/2764-17-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/1028-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x0007000000023298-13.dat	UPX
behavioral2/memory/2764-17-0x0000000000400000-0x000000000040E000-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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
2764	gewos.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1028-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x0007000000023298-13.dat	upx
behavioral2/memory/2764-17-0x0000000000400000-0x000000000040E000-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 1028 wrote to memory of 2764	1028	2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe	82
PID 1028 wrote to memory of 2764	1028	2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe	82
PID 1028 wrote to memory of 2764	1028	2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1028
- 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:2764

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
57KB

MD5
7cda86a55ae39d11bba176d5e3f06f01

SHA1
28263b7f7897651cbd2213254d99cf202e2547ac

SHA256
545de6751d275c1250571bc7a20325e7ac9c67d2285ce3a5ab0d78f87d1c1824

SHA512
18c91c890c0bfe08aa6f7ad48362894525b90fe2e929bfeb3be10aa344f726f7ae1ed196a5feb002b632a343e1c19bcfb9dab6b1d63b60c354ba62f6d75b7751

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

Filesize
185B

MD5
5d8ac463b8573fc8a85730ea2218e9f5

SHA1
77c826999bb14f98e9e471ade2649695ec03a86f

SHA256
ca966761310894c6999ae85f889f24ef6aa4fe31925679549f2ee8ddf3f5cdb6

SHA512
3c5c8e21e718c578a5624334022fd460d9999183e86561163ef9330e89eff7d41be3fa68a2f0abf2a716552af07a263e1b1239ccfda9891a0cffdabf38466bef

Download Submit
memory/1028-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1028-1-0x0000000002200000-0x0000000002206000-memory.dmp

Filesize
24KB

Download
memory/1028-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1028-9-0x0000000002200000-0x0000000002206000-memory.dmp

Filesize
24KB

Download
memory/2764-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2764-27-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download