202c45c0077ae11a8daad8dcd355d590d8366ed8ccd88d10ff0042f0e16f44cd

Analysis

max time kernel
120s
max time network
126s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
17-05-2024 05:47

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General

Target

2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe
Size

57KB
MD5

89afe568d8c0080d8348c4608e617e72
SHA1

127fa64faf7177447e2e8fe13d3c97eaa52ac678
SHA256

202c45c0077ae11a8daad8dcd355d590d8366ed8ccd88d10ff0042f0e16f44cd
SHA512

2ddf365233d63a56875a14e29e50f4e328951fc4c0cf4e3893f5eb10a1e1b8408c77e20baa977d1b6664eccd253821ee2672204c63119851634eeabe00fee30d
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlgzM:bP9g/xtCS3Dxx0nM

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral1/memory/1500-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b0000000155e2-11.dat	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral1/memory/1500-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000b0000000155e2-11.dat	UPX

Executes dropped EXE 1 IoCs

pid	Process
2900	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
1500	2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1500-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000b0000000155e2-11.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
1500	2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe
2900	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1500 wrote to memory of 2900	1500	2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe	28
PID 1500 wrote to memory of 2900	1500	2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe	28
PID 1500 wrote to memory of 2900	1500	2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe	28
PID 1500 wrote to memory of 2900	1500	2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-17_89afe568d8c0080d8348c4608e617e72_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1500
- 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:2900

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
7cda86a55ae39d11bba176d5e3f06f01

SHA1
28263b7f7897651cbd2213254d99cf202e2547ac

SHA256
545de6751d275c1250571bc7a20325e7ac9c67d2285ce3a5ab0d78f87d1c1824

SHA512
18c91c890c0bfe08aa6f7ad48362894525b90fe2e929bfeb3be10aa344f726f7ae1ed196a5feb002b632a343e1c19bcfb9dab6b1d63b60c354ba62f6d75b7751

Download Submit
memory/1500-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1500-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1500-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1500-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2900-24-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download