a6f0f0c14a4dde07b3d6d9706d821b3cfd7dda7b73a380d3064b466a8be8f048

Analysis

max time kernel
148s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
25-05-2024 21:35

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General

Target

2024-05-25_ca4069d4ba76faa3678f3d25e8347172_cryptolocker.exe
Size

91KB
MD5

ca4069d4ba76faa3678f3d25e8347172
SHA1

ca3b97b03b3b5049d73cde2111821ba53615f821
SHA256

a6f0f0c14a4dde07b3d6d9706d821b3cfd7dda7b73a380d3064b466a8be8f048
SHA512

d4942ba428d5c5995be9eea24a1aa2c377f5ba408729812e34fe075d738e55802ba37b36b4809e2b437cdbd3a68c94dcb22c5abe8d7511d902dc125976116428
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/U:n6a+1SEOtEvwDpjYYvQd2P7

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2956-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000015a2d-11.dat	CryptoLocker_rule2
behavioral1/memory/2956-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3012-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2956-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000015a2d-11.dat	CryptoLocker_set1
behavioral1/memory/2956-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3012-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2956-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000015a2d-11.dat	UPX
behavioral1/memory/2956-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3012-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3012	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2956	2024-05-25_ca4069d4ba76faa3678f3d25e8347172_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2956-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000015a2d-11.dat	upx
behavioral1/memory/2956-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3012-25-0x0000000000500000-0x0000000000510000-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 2956 wrote to memory of 3012	2956	2024-05-25_ca4069d4ba76faa3678f3d25e8347172_cryptolocker.exe	28
PID 2956 wrote to memory of 3012	2956	2024-05-25_ca4069d4ba76faa3678f3d25e8347172_cryptolocker.exe	28
PID 2956 wrote to memory of 3012	2956	2024-05-25_ca4069d4ba76faa3678f3d25e8347172_cryptolocker.exe	28
PID 2956 wrote to memory of 3012	2956	2024-05-25_ca4069d4ba76faa3678f3d25e8347172_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-25_ca4069d4ba76faa3678f3d25e8347172_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_ca4069d4ba76faa3678f3d25e8347172_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2956
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3012

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
91KB

MD5
468e755d8fc9f156347c0c720edce267

SHA1
75758f73e2df04730ebfa1b97a2ce2a5871027e6

SHA256
6652a4c46e641e98f487eb3a33074ef3ae24057d7ff36a955dd16adeb8e5516a

SHA512
4c64743d342ae4b5a91a3b768f38430bf797a399057507582f41e51bd3f25a80a8f38917000ab355fc17ee893118ba5f8ed510f26f7c9bdd71ffe5a1ce781913

Download Submit
memory/2956-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2956-3-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2956-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2956-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2956-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3012-18-0x0000000000200000-0x0000000000206000-memory.dmp

Filesize
24KB

Download
memory/3012-17-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/3012-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download