1285802afe2aa367443cf49cf03c7a11139d200e3fd2c9bb53457dd8b4152f4d

General

Target

2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe
Size

64KB
MD5

a20b0bff9547a4cd3b07441c6e1f08eb
SHA1

789e050005769a715b3b199c63a3dfc9aa2a1286
SHA256

1285802afe2aa367443cf49cf03c7a11139d200e3fd2c9bb53457dd8b4152f4d
SHA512

d51705967d47a1990efe3da01b5d952c5e3ca91bd2cff6105bb606c2cae0aafe88659a2c25d7006b7f74ed3e11fb0a33e9720db6fa2943ca825ed42d1e19d3a9
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAo3:1nK6a+qdOOtEvwDpjZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2784-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x00090000000141c0-11.dat	CryptoLocker_rule2
behavioral1/memory/2784-12-0x00000000006D0000-0x00000000006E0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2784-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3048-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3048-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2784-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x00090000000141c0-11.dat	CryptoLocker_set1
behavioral1/memory/2784-12-0x00000000006D0000-0x00000000006E0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2784-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/3048-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/3048-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2784-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x00090000000141c0-11.dat	UPX
behavioral1/memory/2784-12-0x00000000006D0000-0x00000000006E0000-memory.dmp	UPX
behavioral1/memory/2784-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/3048-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/3048-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3048	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2784	2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2784-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x00090000000141c0-11.dat	upx
behavioral1/memory/2784-12-0x00000000006D0000-0x00000000006E0000-memory.dmp	upx
behavioral1/memory/2784-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/3048-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/3048-27-0x0000000000500000-0x000000000050F311-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 2784 wrote to memory of 3048	2784	2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe	28
PID 2784 wrote to memory of 3048	2784	2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe	28
PID 2784 wrote to memory of 3048	2784	2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe	28
PID 2784 wrote to memory of 3048	2784	2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2784
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3048

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
f215f8ab9b0fdda0bd7642e8f8862d64

SHA1
1687bb4cd949468f82d93698c11a2f3d4dbd71a7

SHA256
3c15d787793a89c21becee9e05a36396f6568813bc0eed8f8276cc73b7c74c67

SHA512
65a1f6f83452c7fc7bfa98e7becb5508734168f02f6b2be7958074cc5dadb6dde95c6d123708dec14fe24567363597195abb9645914ac8dc14627df46477c403

Download Submit
memory/2784-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2784-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2784-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2784-2-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2784-12-0x00000000006D0000-0x00000000006E0000-memory.dmp

Filesize
64KB

Download
memory/2784-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3048-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3048-19-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/3048-26-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/3048-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

Sharing