212f596b4d26b1b188ad1e08f552e035fa24a51bda350087a127fb05c3debdf5

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2168-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\gewos.exe	CryptoLocker_rule2
behavioral1/memory/2168-13-0x0000000001EA0000-0x0000000001EAE000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3068-18-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2168-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\gewos.exe	UPX
behavioral1/memory/2168-13-0x0000000001EA0000-0x0000000001EAE000-memory.dmp	UPX
behavioral1/memory/3068-18-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

gewos.exe

pid process

3068 gewos.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe

pid process

2168 2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe

pid	process
3068	gewos.exe

pid	process
2168	2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2168-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\gewos.exe	upx
behavioral1/memory/2168-13-0x0000000001EA0000-0x0000000001EAE000-memory.dmp	upx
behavioral1/memory/3068-18-0x0000000000400000-0x000000000040E000-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 UnmapMainImage 2 IoCs

Processes:

2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exegewos.exe

pid process

2168 2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe
3068 gewos.exe

pid	process
2168	2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe
3068	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe

description	pid	process	target process
PID 2168 wrote to memory of 3068	2168	2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe	gewos.exe
PID 2168 wrote to memory of 3068	2168	2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe	gewos.exe
PID 2168 wrote to memory of 3068	2168	2024-05-22_8e8b6c95518ad4f140f3a584468b1223_cryptolocker.exe	gewos.exe
PID 2168 wrote to memory of 3068	2168	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⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2168

C:\Users\Admin\AppData\Local\Temp\gewos.exe
"C:\Users\Admin\AppData\Local\Temp\gewos.exe"
2⤵
- Executes dropped EXE
- Suspicious use of UnmapMainImage
PID:3068

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

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

MD5
5373ca6fa0731f1572e405087886c3cc

SHA1
fb1be9df68d6070f3b599a6849184aa2770d0277

SHA256
c80d69ad177b865c4286173bbf3284c52963bc50cf1ed0f8000f310bb0ee61bf

SHA512
d9fd30f85ba8d9424c4b88545dc6d98e9d14d42758b75a9baae14981dfead837989c8833a0f1e088dbdd2ee4aebbf333b091d957dd26a7a682800c2bebd3f546

Download Submit
memory/2168-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2168-9-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2168-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2168-1-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2168-13-0x0000000001EA0000-0x0000000001EAE000-memory.dmp

Filesize
56KB

Download
memory/3068-18-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3068-26-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download