cf5523d91afb819d90c4ca3bfe6a536598a7d031b816db74a3a817aef3021585

Analysis

max time kernel
119s
max time network
119s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
16/05/2024, 06:43

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General

Target

2024-05-16_4479a7ccc3abb329c4d40dc16e1d2242_cryptolocker.exe
Size

57KB
MD5

4479a7ccc3abb329c4d40dc16e1d2242
SHA1

40bef9addf679c174818b4f446b64893a05cd0a8
SHA256

cf5523d91afb819d90c4ca3bfe6a536598a7d031b816db74a3a817aef3021585
SHA512

e214e3d5ff049b9cbf045f2121c023528381b0b9bbb908afd2b0975e8804b06fa6d0d880f772285a994f1767c1f5bb78984fa6a5d588624af4e2969bb83566fd
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlbQ9mEt:bP9g/xtCS3Dxx0AQUy

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral1/memory/2864-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000013143-11.dat	CryptoLocker_rule2
behavioral1/memory/2096-16-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/2864-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000c000000013143-11.dat	UPX
behavioral1/memory/2096-16-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2096	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2864	2024-05-16_4479a7ccc3abb329c4d40dc16e1d2242_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2864-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000c000000013143-11.dat	upx
behavioral1/memory/2096-16-0x0000000000400000-0x000000000040E000-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
2864	2024-05-16_4479a7ccc3abb329c4d40dc16e1d2242_cryptolocker.exe
2096	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2864 wrote to memory of 2096	2864	2024-05-16_4479a7ccc3abb329c4d40dc16e1d2242_cryptolocker.exe	28
PID 2864 wrote to memory of 2096	2864	2024-05-16_4479a7ccc3abb329c4d40dc16e1d2242_cryptolocker.exe	28
PID 2864 wrote to memory of 2096	2864	2024-05-16_4479a7ccc3abb329c4d40dc16e1d2242_cryptolocker.exe	28
PID 2864 wrote to memory of 2096	2864	2024-05-16_4479a7ccc3abb329c4d40dc16e1d2242_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-16_4479a7ccc3abb329c4d40dc16e1d2242_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-16_4479a7ccc3abb329c4d40dc16e1d2242_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2864
- 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:2096

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
57KB

MD5
a9f9f2761e8972b01f46fd837f7cdc80

SHA1
1491df6c0fbe06028ccc05e1adddeefd614315ac

SHA256
1e56e68caaa1a843159bc33f605e2266bdad5be0150600b322b864a9c6094b60

SHA512
ee11f1a6bf0e048b234aa2826753ad77b53c08a5383c67e765e9a4741b92bcb2f7f8eb68f31abd298872b1cca5a8c19b95929bf463630c9a8425326f87568262

Download Submit
memory/2096-16-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2096-25-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2864-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2864-1-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download
memory/2864-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2864-9-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download