6d6266b8250696d1869ea41bd9d2f7222c16d597df0ec2b9a597017feed3c882

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
21/02/2024, 17:53

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General

Target

2024-02-21_79776ad6213c3e7aee59d99b49a8bb63_cryptolocker.exe
Size

77KB
MD5

79776ad6213c3e7aee59d99b49a8bb63
SHA1

0a826be0aa59261bbc58e64783f024d85e1f436f
SHA256

6d6266b8250696d1869ea41bd9d2f7222c16d597df0ec2b9a597017feed3c882
SHA512

525eee899337f88610af6fe295f3f856c65f40644576344ba2069e0ea421607644699c8c8b40a048caecddf4ffd958643b162cbbd53dba156c218c5770afe769
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOA+YSafiPuy:T6a+rdOOtEvwDpjNcc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2876-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2876-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000013a06-15.dat	CryptoLocker_rule2
behavioral1/memory/2588-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2588-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2876-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2876-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000013a06-15.dat	CryptoLocker_set1
behavioral1/memory/2588-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2588-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2876-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2876-14-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000013a06-15.dat	UPX
behavioral1/memory/2588-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2588-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2588	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2876	2024-02-21_79776ad6213c3e7aee59d99b49a8bb63_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2876-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2876-14-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000013a06-15.dat	upx
behavioral1/memory/2588-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2588-26-0x0000000000500000-0x0000000000510000-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 2876 wrote to memory of 2588	2876	2024-02-21_79776ad6213c3e7aee59d99b49a8bb63_cryptolocker.exe	28
PID 2876 wrote to memory of 2588	2876	2024-02-21_79776ad6213c3e7aee59d99b49a8bb63_cryptolocker.exe	28
PID 2876 wrote to memory of 2588	2876	2024-02-21_79776ad6213c3e7aee59d99b49a8bb63_cryptolocker.exe	28
PID 2876 wrote to memory of 2588	2876	2024-02-21_79776ad6213c3e7aee59d99b49a8bb63_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-21_79776ad6213c3e7aee59d99b49a8bb63_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-21_79776ad6213c3e7aee59d99b49a8bb63_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2876
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2588

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

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

Filesize
77KB

MD5
f7aa6096826a398912e6136853a5473d

SHA1
81c6d506bbfa67c5d05c67e27283933e83379fd5

SHA256
f3d2d7fc0c33582da88691b6144659fad71039736c3eed301c05e66db72a522d

SHA512
222977837c692f609dcdb208f5eb48541025252022ccc9b898885a72bebba971a06711584ca3a0be1c9e55e614e35db7b1854a1914df756a0a3e29380f3111c7

Download Submit
memory/2588-19-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2588-18-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2588-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2588-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2876-2-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2876-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2876-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2876-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2876-14-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download