099f2c9f341e07bf055d481973759aa2b1f3a86a71ee3817ce046cd11712c894

Analysis

max time kernel
119s
max time network
125s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15/04/2024, 20:59

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General

Target

2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe
Size

36KB
MD5

d1fbaf2b042a319863342fee1d9e854e
SHA1

39182569bb5c4310670884f0e5bdcb9f23815ec7
SHA256

099f2c9f341e07bf055d481973759aa2b1f3a86a71ee3817ce046cd11712c894
SHA512

ce3ec0b6bf7c4e81008795f1b302bbe8a0671f1f77061f9f3d31bf0e079c08e75f3e9aec06aaeba68c054fe2e5adb8cceb32512c4161df414b519cd53f7aa357
SSDEEP

768:b7W5A8WtijKeOcfXor3BPOz5CFBmNuFgM:b7W5AWjTGx02

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2808-0-0x0000000000400000-0x000000000040D000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000014a94-11.dat	CryptoLocker_rule2
behavioral1/memory/2204-16-0x0000000000400000-0x000000000040D000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2808-41-0x0000000001EE0000-0x0000000001EED000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2808-0-0x0000000000400000-0x000000000040D000-memory.dmp	UPX
behavioral1/files/0x000a000000014a94-11.dat	UPX
behavioral1/memory/2204-16-0x0000000000400000-0x000000000040D000-memory.dmp	UPX
behavioral1/memory/2808-41-0x0000000001EE0000-0x0000000001EED000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2204	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2808	2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2808-0-0x0000000000400000-0x000000000040D000-memory.dmp	upx
behavioral1/files/0x000a000000014a94-11.dat	upx
behavioral1/memory/2204-16-0x0000000000400000-0x000000000040D000-memory.dmp	upx
behavioral1/memory/2808-41-0x0000000001EE0000-0x0000000001EED000-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
2808	2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe
2204	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2808 wrote to memory of 2204	2808	2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe	28
PID 2808 wrote to memory of 2204	2808	2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe	28
PID 2808 wrote to memory of 2204	2808	2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe	28
PID 2808 wrote to memory of 2204	2808	2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_d1fbaf2b042a319863342fee1d9e854e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2808
- 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:2204

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
36KB

MD5
9aafc5641440d9634bf82219f6ef54f7

SHA1
aae4ff9359893eb830969498cfebad6e095d91c6

SHA256
19cb236d737f162812102bef110675b66456663b3e8e3a9561c85f64fd291281

SHA512
2ce7c5d346ce40ac66c951c2f81a5d3da52be3e8592f55267b958c1f7af65e390338ea9a1c75071217fd6862d34029472d348a746d8abce51830f9f3456922a3

Download Submit
memory/2204-16-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/2204-18-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2808-0-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/2808-1-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2808-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2808-2-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2808-15-0x0000000001EE0000-0x0000000001EED000-memory.dmp

Filesize
52KB

Download
memory/2808-41-0x0000000001EE0000-0x0000000001EED000-memory.dmp

Filesize
52KB

Download