3c8bb7241bec12f1e28786bb466483c2827e6686e7cd31bd2ff5bfbeb90b8d07

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
13/05/2024, 12:25

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General

Target

2024-05-13_1e9a84c7edc546ca3617c1b1e61a29a4_cryptolocker.exe
Size

78KB
MD5

1e9a84c7edc546ca3617c1b1e61a29a4
SHA1

7da09c1c417d1ce26b495da5e95431e2800b525e
SHA256

3c8bb7241bec12f1e28786bb466483c2827e6686e7cd31bd2ff5bfbeb90b8d07
SHA512

d90056b4a754bf8c4d5baeb553fadccf39fa87215477611b4871e0b49f2331ca69f7b74f348ff30c83d26075d0268016217859004f94757099e8eb399d320652
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1H:T6a+rdOOtEvwDpjNtHPc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/3040-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000014abe-11.dat	CryptoLocker_rule2
behavioral1/memory/3040-12-0x00000000023A0000-0x00000000023B0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3040-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2516-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/3040-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000014abe-11.dat	CryptoLocker_set1
behavioral1/memory/3040-12-0x00000000023A0000-0x00000000023B0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3040-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2516-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/3040-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000014abe-11.dat	UPX
behavioral1/memory/3040-12-0x00000000023A0000-0x00000000023B0000-memory.dmp	UPX
behavioral1/memory/3040-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2516-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2516	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
3040	2024-05-13_1e9a84c7edc546ca3617c1b1e61a29a4_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3040-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000014abe-11.dat	upx
behavioral1/memory/3040-12-0x00000000023A0000-0x00000000023B0000-memory.dmp	upx
behavioral1/memory/3040-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2516-18-0x0000000000500000-0x0000000000510000-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 3040 wrote to memory of 2516	3040	2024-05-13_1e9a84c7edc546ca3617c1b1e61a29a4_cryptolocker.exe	28
PID 3040 wrote to memory of 2516	3040	2024-05-13_1e9a84c7edc546ca3617c1b1e61a29a4_cryptolocker.exe	28
PID 3040 wrote to memory of 2516	3040	2024-05-13_1e9a84c7edc546ca3617c1b1e61a29a4_cryptolocker.exe	28
PID 3040 wrote to memory of 2516	3040	2024-05-13_1e9a84c7edc546ca3617c1b1e61a29a4_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-13_1e9a84c7edc546ca3617c1b1e61a29a4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-13_1e9a84c7edc546ca3617c1b1e61a29a4_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3040
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2516

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
78KB

MD5
06e86b89ecee27f20a0b3fe02fc98ce4

SHA1
375da6570ed01539c705a47ed471c29b026d611b

SHA256
d1b8189c69c86f048ca6c3c77dd5a37d81862ba6e9542fb510cb346c2316dede

SHA512
d43c017c90db4a548ec8e722edb83e4223a0a1725c906b6d8d44e339e059d7955a9e9b79cdb425dd3e28e82e5274c0e344dab53d62524e5ef5126440562dff53

Download Submit
memory/2516-19-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2516-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2516-20-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/3040-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3040-1-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/3040-2-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/3040-3-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/3040-12-0x00000000023A0000-0x00000000023B0000-memory.dmp

Filesize
64KB

Download
memory/3040-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download