40d449d81a96779156097235e5ea4c63265ccf076e6f7300017cd864e15dcc82

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
27-04-2024 18:27

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General

Target

2024-04-27_20e137bfa7f5f962cf86133c8e201e1b_cryptolocker.exe
Size

54KB
MD5

20e137bfa7f5f962cf86133c8e201e1b
SHA1

ab83c67f504534b1f636ce2abef322dabbdaf8d6
SHA256

40d449d81a96779156097235e5ea4c63265ccf076e6f7300017cd864e15dcc82
SHA512

ca244eee089b8cb6077cf24cada6ff3f28910219b03f7c5d5dcda581f27ccec390994f096d5bbdf2df8c9095d74734ddd3e7f09561190faf1bddd0156d4e1522
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgCb:bP9g/xtCS3Dxx0Qb

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d000000014708-11.dat	CryptoLocker_rule2
behavioral1/memory/1836-17-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000d000000014708-11.dat	UPX
behavioral1/memory/1836-17-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1836	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2004	2024-04-27_20e137bfa7f5f962cf86133c8e201e1b_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000d000000014708-11.dat	upx
behavioral1/memory/1836-17-0x0000000000400000-0x000000000040E000-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
2004	2024-04-27_20e137bfa7f5f962cf86133c8e201e1b_cryptolocker.exe
1836	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2004 wrote to memory of 1836	2004	2024-04-27_20e137bfa7f5f962cf86133c8e201e1b_cryptolocker.exe	28
PID 2004 wrote to memory of 1836	2004	2024-04-27_20e137bfa7f5f962cf86133c8e201e1b_cryptolocker.exe	28
PID 2004 wrote to memory of 1836	2004	2024-04-27_20e137bfa7f5f962cf86133c8e201e1b_cryptolocker.exe	28
PID 2004 wrote to memory of 1836	2004	2024-04-27_20e137bfa7f5f962cf86133c8e201e1b_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-27_20e137bfa7f5f962cf86133c8e201e1b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_20e137bfa7f5f962cf86133c8e201e1b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2004
- 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:1836

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

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

Filesize
55KB

MD5
ab49fd648eceb287968a1fd08e46ebef

SHA1
08d488b3ece32e51db0da1c810951f17a8118d1c

SHA256
5251a15bb805c593f5839b5d0d803e1a4060671104a71ca7f506f79f90e35e69

SHA512
8742d2fb1755ade515a325231b9933ee372c59fca601fd7e163079da2c04e0c3b8a44968635be93d05b74f51d03b8a8b90955143a9717b2f5557166dc9169fed

Download Submit
memory/1836-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1836-26-0x0000000000350000-0x0000000000356000-memory.dmp

Filesize
24KB

Download
memory/2004-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2004-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2004-2-0x0000000000410000-0x0000000000416000-memory.dmp

Filesize
24KB

Download
memory/2004-1-0x0000000000410000-0x0000000000416000-memory.dmp

Filesize
24KB

Download
memory/2004-15-0x0000000001E90000-0x0000000001E9E000-memory.dmp

Filesize
56KB

Download