212f596b4d26b1b188ad1e08f552e035fa24a51bda350087a127fb05c3debdf5

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 02:40

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General

Target

2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe
Size

55KB
MD5

8e8b6c95518ad4f140f3a584468b1223
SHA1

f523c9b0ad9862a6f092e69e99db4b03559ead00
SHA256

212f596b4d26b1b188ad1e08f552e035fa24a51bda350087a127fb05c3debdf5
SHA512

efc0188aebde4d4b979ab371800377eca43d4258b5f9d1b009bc380223d2e639c7d684195173c5de93164831765b5571694f2fde4cf6f86d6668395473b9610f
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlr:bP9g/xtCS3Dxx0w

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4788-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\gewos.exe	CryptoLocker_rule2
behavioral2/memory/2456-18-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4788-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\gewos.exe	UPX
behavioral2/memory/2456-18-0x0000000000400000-0x000000000040E000-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

Processes:

2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exegewos.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

Processes:

gewos.exe

pid process

2456 gewos.exe

pid	process
2456	gewos.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4788-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\gewos.exe	upx
behavioral2/memory/2456-18-0x0000000000400000-0x000000000040E000-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

Processes:

2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe

description	pid	process	target process
PID 4788 wrote to memory of 2456	4788	2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe	gewos.exe
PID 4788 wrote to memory of 2456	4788	2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe	gewos.exe
PID 4788 wrote to memory of 2456	4788	2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe	gewos.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4788

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:2456

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\gewos.exe
Filesize
56KB

MD5
5373ca6fa0731f1572e405087886c3cc

SHA1
fb1be9df68d6070f3b599a6849184aa2770d0277

SHA256
c80d69ad177b865c4286173bbf3284c52963bc50cf1ed0f8000f310bb0ee61bf

SHA512
d9fd30f85ba8d9424c4b88545dc6d98e9d14d42758b75a9baae14981dfead837989c8833a0f1e088dbdd2ee4aebbf333b091d957dd26a7a682800c2bebd3f546

Download Submit
C:\Users\Admin\AppData\Local\Temp\gewosik.exe
Filesize
185B

MD5
94b1c0b11fbc3f9da60b2a09b9627589

SHA1
53338daa7d457ad361132cffc68be40a6c1cf4cf

SHA256
139e086be920da8bc994cf5fbc056e21526c0bb6f7b5f015b8097646ca5da6b7

SHA512
3538bb9f22e82cab8797c927d1afde3489453f2f387a822c207e82fec50a23135f39c17e5eeaea287c14a64b2a5548379fcea758f91a58d4dedd7e676a791d21

Download Submit
memory/2456-18-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2456-27-0x0000000002020000-0x0000000002026000-memory.dmp

Filesize
24KB

Download
memory/4788-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/4788-1-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/4788-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4788-9-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download