e1ee460e7ab9af70883a845444c3a23506722a541a948ca982e1cf2f4f290ea7

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
11/04/2024, 03:55

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General

Target

2024-04-11_eb971052a3279b5fb329d6cff046ad13_cryptolocker.exe
Size

35KB
MD5

eb971052a3279b5fb329d6cff046ad13
SHA1

61379c49089798317b1ee531ec2d451ddd721c72
SHA256

e1ee460e7ab9af70883a845444c3a23506722a541a948ca982e1cf2f4f290ea7
SHA512

7339363801b87294b0e9ce23d41335b2b6416dec79a9621766c5614e5e807ca1b1b1ca0ecac255715feead75c5f8aca025ff1a6982be18467a3a0d35687feb70
SSDEEP

768:b7W5A8WtijKeOcfXor3BPOz5CFBmNuFgf:b7W5AWjTGx0J

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral1/memory/2644-0-0x0000000000400000-0x000000000040D000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012253-11.dat	CryptoLocker_rule2
behavioral1/memory/2576-15-0x0000000000400000-0x000000000040D000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/2644-0-0x0000000000400000-0x000000000040D000-memory.dmp	UPX
behavioral1/files/0x000c000000012253-11.dat	UPX
behavioral1/memory/2576-15-0x0000000000400000-0x000000000040D000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2576	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2644	2024-04-11_eb971052a3279b5fb329d6cff046ad13_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2644-0-0x0000000000400000-0x000000000040D000-memory.dmp	upx
behavioral1/files/0x000c000000012253-11.dat	upx
behavioral1/memory/2576-15-0x0000000000400000-0x000000000040D000-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
2644	2024-04-11_eb971052a3279b5fb329d6cff046ad13_cryptolocker.exe
2576	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2644 wrote to memory of 2576	2644	2024-04-11_eb971052a3279b5fb329d6cff046ad13_cryptolocker.exe	28
PID 2644 wrote to memory of 2576	2644	2024-04-11_eb971052a3279b5fb329d6cff046ad13_cryptolocker.exe	28
PID 2644 wrote to memory of 2576	2644	2024-04-11_eb971052a3279b5fb329d6cff046ad13_cryptolocker.exe	28
PID 2644 wrote to memory of 2576	2644	2024-04-11_eb971052a3279b5fb329d6cff046ad13_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-11_eb971052a3279b5fb329d6cff046ad13_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-11_eb971052a3279b5fb329d6cff046ad13_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2644
- 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:2576

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
35KB

MD5
3e41c1d6f69bfe678b6108c1fac8d46a

SHA1
c1f0438d6ae0e2858e24f430e08f6612a1f176e2

SHA256
54715d5486bcc2178adab9b8f1a76f0711f10e1b52e79b0afc3d775efd4ff4b3

SHA512
1eb90e8c2435c140f9e67eb39d66aaed6cc5855e29f5dc78039c9580176b4858953285f1f12fdfda35d8947a5942c593ebe27db348d15acb895a0886b0c03c99

Download Submit
memory/2576-15-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/2576-24-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2644-0-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/2644-1-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2644-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2644-6-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download