addb328d597626b192e0ea0dfe07918033fc881a325e3f1fa9ea87de43b585b8

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
27-05-2024 02:36

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General

Target

2024-05-27_72faecfc21b7f09a2605f851d294317b_cryptolocker.exe
Size

56KB
MD5

72faecfc21b7f09a2605f851d294317b
SHA1

3ec3d5d8c44d632f4cd5ab710cdd65615a729a9f
SHA256

addb328d597626b192e0ea0dfe07918033fc881a325e3f1fa9ea87de43b585b8
SHA512

c27fda97b86b9874f6700a1194ba45403805841f633c6cb2048760e556d080367e179c3f8b6b3e5031e3cfb1eb3cd2e0ce96bc3d8a79abec512098ece2ce61d6
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlYG:bP9g/xtCS3Dxx0LG

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/3088-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000233f3-13.dat	CryptoLocker_rule2
behavioral2/memory/1932-18-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/3088-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x00090000000233f3-13.dat	UPX
behavioral2/memory/1932-18-0x0000000000400000-0x000000000040E000-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	2024-05-27_72faecfc21b7f09a2605f851d294317b_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
1932	gewos.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3088-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x00090000000233f3-13.dat	upx
behavioral2/memory/1932-18-0x0000000000400000-0x000000000040E000-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 3088 wrote to memory of 1932	3088	2024-05-27_72faecfc21b7f09a2605f851d294317b_cryptolocker.exe	85
PID 3088 wrote to memory of 1932	3088	2024-05-27_72faecfc21b7f09a2605f851d294317b_cryptolocker.exe	85
PID 3088 wrote to memory of 1932	3088	2024-05-27_72faecfc21b7f09a2605f851d294317b_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-27_72faecfc21b7f09a2605f851d294317b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_72faecfc21b7f09a2605f851d294317b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3088
- 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:1932

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
2b42aa6b7f60086aaf57823f5b529b5c

SHA1
83ceb2efd89885fd9eac2990ede290d7afdb180a

SHA256
30764775f46b901171a907b8e367686cba2d74d7fcb80c4004a0547e5652e25e

SHA512
5afbd1f75850a0ee3dc772d8143f8a767d33a4ad4e279cd74fc0cf50aea372fd2d2d3c58169620b54624aa1b3eae09b7e5d1fa2dbd34b24d99ded543ba2652ac

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

Filesize
185B

MD5
bfb036df78c6e496605e21df08cf5fed

SHA1
059df4b5b6ed77a30cca6128c4c392148bcfd805

SHA256
08d7f012b82b7ce65c555fd63ac5a1fd2a87571dadeb59ce2e9c0f07070cfdae

SHA512
bfdd7fef28610b518d356923fac3d9673877f53a5c04f9fc06306e1f54dd7dd36047fd28208dd3dbca8e503edaa0d5ad7003ccecaf053cefef339f948b03f46a

Download Submit
memory/1932-18-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1932-27-0x0000000001F90000-0x0000000001F96000-memory.dmp

Filesize
24KB

Download
memory/3088-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3088-1-0x00000000020A0000-0x00000000020A6000-memory.dmp

Filesize
24KB

Download
memory/3088-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3088-9-0x00000000020A0000-0x00000000020A6000-memory.dmp

Filesize
24KB

Download