d799eb70bae2c77c7e1a62584df35999d2ce826dd4b5eb008779fa2d5c9fb885

Analysis

max time kernel
117s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
16/04/2024, 04:47

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General

Target

2024-04-16_657f40d59ea24be26b4065b60b44730a_cryptolocker.exe
Size

54KB
MD5

657f40d59ea24be26b4065b60b44730a
SHA1

a6adcafca84bc32ddf8f6203301cd81b9d16481e
SHA256

d799eb70bae2c77c7e1a62584df35999d2ce826dd4b5eb008779fa2d5c9fb885
SHA512

e9372d2da8411a8085ff9c6b53509e051ceda0d04055c089ac00881237ef3675c6384b38080d0f1b49d46b047d1b611466000e7d0a9bc6874960f3a93d120566
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlm:bP9g/xtCS3Dxx0J

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral1/memory/1548-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d000000014466-11.dat	CryptoLocker_rule2
behavioral1/memory/2564-18-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/1548-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000d000000014466-11.dat	UPX
behavioral1/memory/2564-18-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2564	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
1548	2024-04-16_657f40d59ea24be26b4065b60b44730a_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1548-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000d000000014466-11.dat	upx
behavioral1/memory/2564-18-0x0000000000400000-0x000000000040E000-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

pid	Process
1548	2024-04-16_657f40d59ea24be26b4065b60b44730a_cryptolocker.exe
2564	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1548 wrote to memory of 2564	1548	2024-04-16_657f40d59ea24be26b4065b60b44730a_cryptolocker.exe	28
PID 1548 wrote to memory of 2564	1548	2024-04-16_657f40d59ea24be26b4065b60b44730a_cryptolocker.exe	28
PID 1548 wrote to memory of 2564	1548	2024-04-16_657f40d59ea24be26b4065b60b44730a_cryptolocker.exe	28
PID 1548 wrote to memory of 2564	1548	2024-04-16_657f40d59ea24be26b4065b60b44730a_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-16_657f40d59ea24be26b4065b60b44730a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-16_657f40d59ea24be26b4065b60b44730a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1548
- 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:2564

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\gewos.exe

Filesize
54KB

MD5
ec89e0e6efb86957eba2f77364e4ff07

SHA1
f0f10053ceb7df0c787baac5bb2bfb42bc007bff

SHA256
c8e9c050d14421947763884a7d299abb653e8b0e2780d4137f5a3e1ebc95ffab

SHA512
ed3dc1796b9efb079281450943b326848b100eb783b34506d0359eee7da975673ee75f8a76982da2e57dfc68a7be810be232dd7616a3060f1f13154472790b79

Download Submit
memory/1548-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1548-1-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/1548-3-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/1548-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1548-16-0x0000000002F20000-0x0000000002F2E000-memory.dmp

Filesize
56KB

Download
memory/1548-43-0x0000000002F20000-0x0000000002F2E000-memory.dmp

Filesize
56KB

Download
memory/2564-18-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2564-19-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download