fa4c35fecb67e79398f7d9d6ea4fc4e50c56008ca4b9b58df9c80e89a473e02f

General

Target

2024-06-05_e4fd58293d7d179b4fa9a5b89e71e61d_cryptolocker.exe
Size

64KB
MD5

e4fd58293d7d179b4fa9a5b89e71e61d
SHA1

c0b12bcb3930b8242fe618d39728d7b58cbbba38
SHA256

fa4c35fecb67e79398f7d9d6ea4fc4e50c56008ca4b9b58df9c80e89a473e02f
SHA512

59cf2e9640a5688644e581aac8ae44749b9b2d1452c8d381b94e9eb5e6d3f0f7931f9d5a0225b0386011c6ee2a7653c1b9aabeab8e015b2bec76360fa264f782
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xz:1nK6a+qdOOtEvwDpj9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2716-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d00000001226b-11.dat	CryptoLocker_rule2
behavioral1/memory/2716-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2716-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2136-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2136-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2716-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d00000001226b-11.dat	CryptoLocker_set1
behavioral1/memory/2716-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2716-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2136-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2136-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2716-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000d00000001226b-11.dat	UPX
behavioral1/memory/2716-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	UPX
behavioral1/memory/2716-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2136-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2136-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2136	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2716	2024-06-05_e4fd58293d7d179b4fa9a5b89e71e61d_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2716-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000d00000001226b-11.dat	upx
behavioral1/memory/2716-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	upx
behavioral1/memory/2716-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2136-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2136-27-0x0000000000500000-0x000000000050F311-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

description	pid	Process	procid_target
PID 2716 wrote to memory of 2136	2716	2024-06-05_e4fd58293d7d179b4fa9a5b89e71e61d_cryptolocker.exe	28
PID 2716 wrote to memory of 2136	2716	2024-06-05_e4fd58293d7d179b4fa9a5b89e71e61d_cryptolocker.exe	28
PID 2716 wrote to memory of 2136	2716	2024-06-05_e4fd58293d7d179b4fa9a5b89e71e61d_cryptolocker.exe	28
PID 2716 wrote to memory of 2136	2716	2024-06-05_e4fd58293d7d179b4fa9a5b89e71e61d_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-05_e4fd58293d7d179b4fa9a5b89e71e61d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-05_e4fd58293d7d179b4fa9a5b89e71e61d_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2716
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2136

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
64KB

MD5
758f1b0cc3f58d725bb0274e7eae7b77

SHA1
b7cd275893f52e1196bf9e7563ab2dedf41e114f

SHA256
85d10f7e7456fbdc77940913e0f5732d3d6a8a7c95d6da692d9c34c3436574fd

SHA512
fd98826db14d2ca41b469262b7906cb5494a7f96e2b0a0017fcb8ef732ad4e46a9c1cf0bd0edb2920511432ee30482846d556cec8a473a35928330d4631d866f

Download Submit
memory/2136-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2136-26-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2136-19-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/2136-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2716-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2716-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2716-2-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2716-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2716-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp

Filesize
64KB

Download
memory/2716-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

Sharing