090f2fb3df61f906fc3592eb7b26a01fbbf1ce9d99d84fb7102c3c6d1dc846af

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
11/05/2024, 05:23

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General

Target

2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe
Size

56KB
MD5

08926f99370fbaa312f72b3264600591
SHA1

80613d31506a76a68e008ef77ffeffe83c50c382
SHA256

090f2fb3df61f906fc3592eb7b26a01fbbf1ce9d99d84fb7102c3c6d1dc846af
SHA512

19b0a804c8a54858431baa8a0dbe5735976d818bff44e164cde2a7b5138169e7913f98e8f2a48235db74814eacf8d77eb5842b9a21c8adb267fe4da07704fafd
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlugJp:bP9g/xtCS3Dxx0ep

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral1/memory/1712-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b0000000143e5-14.dat	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral1/memory/1712-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000b0000000143e5-14.dat	UPX

Executes dropped EXE 1 IoCs

pid	Process
2976	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
1712	2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1712-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000b0000000143e5-14.dat	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
1712	2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe
2976	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 2976	1712	2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe	28
PID 1712 wrote to memory of 2976	1712	2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe	28
PID 1712 wrote to memory of 2976	1712	2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe	28
PID 1712 wrote to memory of 2976	1712	2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1712
- 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:2976

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

Replay Monitor

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Downloads

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

Filesize
56KB

MD5
50d22f32a22a41c462766b53547bd142

SHA1
b76a5829bf8d82a85f9f32042eee6e9002d9dab3

SHA256
2625baf6986568eee784203d4e29f407458aca7b062a39db46e39cfb6795529b

SHA512
df5f552597cc4297c7c980fc3ab5d3137980f8b8d3ceafe7c99da4cc6527608dd592d1d0d78f6714dc0c34fb8937002745bbc099af2e104440ece46c66989670

Download Submit
memory/1712-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1712-1-0x00000000003D0000-0x00000000003D6000-memory.dmp

Filesize
24KB

Download
memory/1712-9-0x00000000003D0000-0x00000000003D6000-memory.dmp

Filesize
24KB

Download
memory/1712-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2976-24-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download