166526d980f9064ff11b26ab7071fcd677cf1b1f7b1161b7a6e0b0d5401e2922

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 23:32

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General

Target

2024-05-22_cf7dec1995d77692e35f227c6d6f011a_cryptolocker.exe
Size

64KB
MD5

cf7dec1995d77692e35f227c6d6f011a
SHA1

e3ac4779033edaeb04aab3ebe1f3043f86526bb2
SHA256

166526d980f9064ff11b26ab7071fcd677cf1b1f7b1161b7a6e0b0d5401e2922
SHA512

9fabb676cc79fc83a31e4e650154bc748a14fc4cc896e68a85d1a4b6d986c82409dbf03b0e4b9d64790c62cb87973deea822f47398529ebff77ea5efbcdb4a16
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiQ:BbdDmjr+OtEvwDpjM8p

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1516-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1516-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1516-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1504-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1504-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1516-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1516-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1504-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1516-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1516-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	UPX
behavioral1/memory/1516-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1504-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1504-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1504 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_cf7dec1995d77692e35f227c6d6f011a_cryptolocker.exe

pid process

1516 2024-05-22_cf7dec1995d77692e35f227c6d6f011a_cryptolocker.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1504	asih.exe

pid	process
1516	2024-05-22_cf7dec1995d77692e35f227c6d6f011a_cryptolocker.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-22_cf7dec1995d77692e35f227c6d6f011a_cryptolocker.exe

description	pid	process	target process
PID 1516 wrote to memory of 1504	1516	2024-05-22_cf7dec1995d77692e35f227c6d6f011a_cryptolocker.exe	asih.exe
PID 1516 wrote to memory of 1504	1516	2024-05-22_cf7dec1995d77692e35f227c6d6f011a_cryptolocker.exe	asih.exe
PID 1516 wrote to memory of 1504	1516	2024-05-22_cf7dec1995d77692e35f227c6d6f011a_cryptolocker.exe	asih.exe
PID 1516 wrote to memory of 1504	1516	2024-05-22_cf7dec1995d77692e35f227c6d6f011a_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_cf7dec1995d77692e35f227c6d6f011a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_cf7dec1995d77692e35f227c6d6f011a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1516
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1504

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\asih.exe

Filesize
64KB

MD5
91412e7767dab60bbe41cfb995eb425d

SHA1
4dcb4f8cf6b35c01266209d632271d32e80973b8

SHA256
c377b1e763f942e6061e541dc0efb33b7a3411e7a1587d41e4dcbe4fca926bb6

SHA512
52a9e9b04e5768abaca6fdfd6f233062b1c13b998b21b6d01012100c15a512ca304e1b0de7a210a5d12ca1466371883255c5089649df13279854068ede60881e

Download Submit
memory/1504-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1504-27-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/1504-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1504-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1516-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1516-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1516-2-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/1516-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1516-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp

Filesize
64KB

Download
memory/1516-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download