f4e9b9bda829c829f2c95806372995fb54a4ea26d6468004cabb7e2b129522dc

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 20:51

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General

Target

2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe
Size

52KB
MD5

44c689d573bd05048100598756e6d8cf
SHA1

8b47c15f6b29a2a43278ff01c6caa07bf2ca9d04
SHA256

f4e9b9bda829c829f2c95806372995fb54a4ea26d6468004cabb7e2b129522dc
SHA512

770982a29239e5af1aa2b2d0184d393decb307d049da159085b09eeba71a8ac9eb66daed99d587a840a0e41f8bba1eac4c58e12676cee06cd029e7d9057c9792
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOnI:bODOw9acifAoc+vsI

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2892-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\lossy.exe	CryptoLocker_rule2
behavioral1/memory/2892-15-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3016-25-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2892-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\lossy.exe	UPX
behavioral1/memory/2892-15-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/3016-25-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

lossy.exe

pid process

3016 lossy.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe

pid process

2892 2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe

pid	process
3016	lossy.exe

pid	process
2892	2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2892-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\lossy.exe	upx
behavioral1/memory/2892-15-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/3016-25-0x0000000008000000-0x000000000800F000-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 WriteProcessMemory 4 IoCs

Processes:

2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe

description	pid	process	target process
PID 2892 wrote to memory of 3016	2892	2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe	lossy.exe
PID 2892 wrote to memory of 3016	2892	2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe	lossy.exe
PID 2892 wrote to memory of 3016	2892	2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe	lossy.exe
PID 2892 wrote to memory of 3016	2892	2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe	lossy.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2892
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3016

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\lossy.exe

Filesize
52KB

MD5
6292c102925b911831a6a37dbd5ddac5

SHA1
44e0fd0491a7f474bfdffa6d73b82930d9163adb

SHA256
b7505b3b717c70f85da4842302b318b4edfa4ddb298c88920773804b84458d13

SHA512
7ed5ba8425af953438ec78ad044c771e3f506d2266087b339e94df8594eff2e719aca80a88b5df964212d684eb73596bf7cc53fdc2b1b67f126c7f6ea118d071

Download Submit
memory/2892-2-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2892-1-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2892-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2892-9-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2892-15-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3016-17-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/3016-24-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/3016-25-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download