16d1dfbf001209d8a1f00382268e9a89d52b59483e28efbbb0c29695fa1b6885

Analysis

max time kernel
149s
max time network
152s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
25/02/2024, 00:52

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General

Target

2024-02-25_b3353d9d2c24bd195f16ff843d3366c1_cryptolocker.exe
Size

64KB
MD5

b3353d9d2c24bd195f16ff843d3366c1
SHA1

e1a7496d0da92c24992a413bb3939a7c4a2db928
SHA256

16d1dfbf001209d8a1f00382268e9a89d52b59483e28efbbb0c29695fa1b6885
SHA512

b4d01b561740c2e6df5a70b091bf1c37d757a4499cbfa66a6040ecb56411796fa25eaf3d839f249bb99678174cc94f28e7f32d9914262c6f313b797aa0326157
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6UnU5:1nK6a+qdOOtEvwDpjN

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1056-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000012241-11.dat	CryptoLocker_rule2
behavioral1/memory/1056-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2524-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2524-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1056-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000012241-11.dat	CryptoLocker_set1
behavioral1/memory/1056-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2524-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2524-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1056-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000b000000012241-11.dat	UPX
behavioral1/memory/1056-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2524-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2524-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2524	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1056	2024-02-25_b3353d9d2c24bd195f16ff843d3366c1_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1056-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000b000000012241-11.dat	upx
behavioral1/memory/1056-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2524-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2524-26-0x0000000000500000-0x000000000050F311-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 1056 wrote to memory of 2524	1056	2024-02-25_b3353d9d2c24bd195f16ff843d3366c1_cryptolocker.exe	28
PID 1056 wrote to memory of 2524	1056	2024-02-25_b3353d9d2c24bd195f16ff843d3366c1_cryptolocker.exe	28
PID 1056 wrote to memory of 2524	1056	2024-02-25_b3353d9d2c24bd195f16ff843d3366c1_cryptolocker.exe	28
PID 1056 wrote to memory of 2524	1056	2024-02-25_b3353d9d2c24bd195f16ff843d3366c1_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-25_b3353d9d2c24bd195f16ff843d3366c1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-25_b3353d9d2c24bd195f16ff843d3366c1_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1056
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2524

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
f41a3e72d5115f489baa507500ce4b13

SHA1
0e45033aab6b30ad9d228e5dc917aba7e962fd3a

SHA256
d94bfb29deecf7c9ce2ba5724b5d9c8ab3feeabe00e907f0d0ca82c3f1f6284e

SHA512
b5e428d5864a8de7f955a25d27a5e8bfa31ee9468c2ad539c9340802b559813567f6f727bf2699bab7d8690eac3d4b54e0a8a938c07ab2df4af63ba2d7b433da

Download Submit
memory/1056-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1056-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1056-2-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/1056-3-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1056-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2524-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2524-18-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2524-21-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2524-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download