33dff4e2f5699b2f00865136668fe43d3e56aed28ecf33b2325342f6b20df152

Analysis

max time kernel
118s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23/05/2024, 19:31

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General

Target

2024-05-23_7614733de1e5882379d5d0fa0cb91709_cryptolocker.exe
Size

56KB
MD5

7614733de1e5882379d5d0fa0cb91709
SHA1

f71b17abed97249aa34a75182060a29b32bf41b1
SHA256

33dff4e2f5699b2f00865136668fe43d3e56aed28ecf33b2325342f6b20df152
SHA512

1e81debc15145d4fe0ded8a6656a9e849a1ce4277795b1be028a9df2cb0f609232feccf59392dfb190f488892d6280ae41fd5cc9e70112172c7cf8f3393cfb88
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjNJl:bP9g/xtCS3Dxx0g

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral1/memory/2704-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a00000001466c-16.dat	CryptoLocker_rule2
behavioral1/memory/2256-17-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/2704-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000a00000001466c-16.dat	UPX
behavioral1/memory/2256-17-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2256	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2704	2024-05-23_7614733de1e5882379d5d0fa0cb91709_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2704-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000a00000001466c-16.dat	upx
behavioral1/memory/2256-17-0x0000000000400000-0x000000000040E000-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
2704	2024-05-23_7614733de1e5882379d5d0fa0cb91709_cryptolocker.exe
2256	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2704 wrote to memory of 2256	2704	2024-05-23_7614733de1e5882379d5d0fa0cb91709_cryptolocker.exe	28
PID 2704 wrote to memory of 2256	2704	2024-05-23_7614733de1e5882379d5d0fa0cb91709_cryptolocker.exe	28
PID 2704 wrote to memory of 2256	2704	2024-05-23_7614733de1e5882379d5d0fa0cb91709_cryptolocker.exe	28
PID 2704 wrote to memory of 2256	2704	2024-05-23_7614733de1e5882379d5d0fa0cb91709_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-23_7614733de1e5882379d5d0fa0cb91709_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_7614733de1e5882379d5d0fa0cb91709_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2704
- 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:2256

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

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

Filesize
56KB

MD5
05a13b2a783cddabb14fc7ddc2660674

SHA1
d0627eee310af0f4d0aceab88b58db4624b4fded

SHA256
d8a1cd7a8da68405645827abdb00c67e41f9b3800b4c9bf663abd5cc776eb041

SHA512
64a2fa846dfd6e87659133c8727924125b81fd42ef4f757eef98d9789b2a3556b76a7b292bb1b882224a518000179a4da2b128ab8e11a9a1d394edb1def1d1e4

Download Submit
memory/2256-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2256-19-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2704-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2704-2-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/2704-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2704-1-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/2704-15-0x0000000002C10000-0x0000000002C1E000-memory.dmp

Filesize
56KB

Download
memory/2704-43-0x0000000002C10000-0x0000000002C1E000-memory.dmp

Filesize
56KB

Download