d10b5e45b45f43ccdc91bb7d53637402ca98e934eb294898e2241a2f40fea1f7

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
11/05/2024, 14:11

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General

Target

2024-05-11_d3264329e9bb0a21b4b8dbbb43402578_cryptolocker.exe
Size

55KB
MD5

d3264329e9bb0a21b4b8dbbb43402578
SHA1

5e7d41c10e4b5c56ce632e988a25a8c42e75701b
SHA256

d10b5e45b45f43ccdc91bb7d53637402ca98e934eb294898e2241a2f40fea1f7
SHA512

69a7e0524e66929fab9266c4cb11baaa4fc754169b3e73191dcac6af9148272fe27d87c0ed5a44e0b79baf4c3fce53a6c61be1464b592a5ecf30b7ad2813f093
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjl+:bP9g/xtCS3Dxx0p

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral1/memory/2856-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b0000000144e8-11.dat	CryptoLocker_rule2
behavioral1/memory/2548-16-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/2856-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000b0000000144e8-11.dat	UPX
behavioral1/memory/2548-16-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2548	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2856	2024-05-11_d3264329e9bb0a21b4b8dbbb43402578_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2856-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000b0000000144e8-11.dat	upx
behavioral1/memory/2548-16-0x0000000000400000-0x000000000040E000-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
2856	2024-05-11_d3264329e9bb0a21b4b8dbbb43402578_cryptolocker.exe
2548	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2856 wrote to memory of 2548	2856	2024-05-11_d3264329e9bb0a21b4b8dbbb43402578_cryptolocker.exe	28
PID 2856 wrote to memory of 2548	2856	2024-05-11_d3264329e9bb0a21b4b8dbbb43402578_cryptolocker.exe	28
PID 2856 wrote to memory of 2548	2856	2024-05-11_d3264329e9bb0a21b4b8dbbb43402578_cryptolocker.exe	28
PID 2856 wrote to memory of 2548	2856	2024-05-11_d3264329e9bb0a21b4b8dbbb43402578_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-11_d3264329e9bb0a21b4b8dbbb43402578_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-11_d3264329e9bb0a21b4b8dbbb43402578_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2856
- 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:2548

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
56KB

MD5
e34a2d579e6ee9c2fc237c7ff46265d0

SHA1
bc2ce943a456072b82fba6037de4315c76902d3b

SHA256
926085384ec421b6d85ca3a4d52aa3f014a2ad114a926d16921166578f96bbe3

SHA512
07b21e898ce6d2d6819308f71b42ae8596bfd0d6bd8b6a19a2c715de3653df6ba7e12c6c3a9541dfc034701561e15adac5e76a1a81b1b146ff2213955f5e936b

Download Submit
memory/2548-16-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2548-25-0x00000000003B0000-0x00000000003B6000-memory.dmp

Filesize
24KB

Download
memory/2856-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2856-1-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2856-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2856-9-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download