c9e82c7b1c46c94b3d88119ab1a7bfde638d1c67d787c2a02437af824598d616

Analysis

max time kernel
149s
max time network
151s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
02/06/2024, 08:25

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General

Target

2024-06-02_a3cb329212abae851ee63b2592e417b4_cryptolocker.exe
Size

34KB
MD5

a3cb329212abae851ee63b2592e417b4
SHA1

e731a8915702d43eedb21ddda9c2b1df1c879941
SHA256

c9e82c7b1c46c94b3d88119ab1a7bfde638d1c67d787c2a02437af824598d616
SHA512

c7bb3e8d61455ca3c1a99b4670731788e056b68fc90a23cc67c4707b2e7ff9a3ce9fea6e5df58118e2f980405b2801f5d76498e477a85bbabef08304bfe3926c
SSDEEP

768:bFPm5zusFUB2preAr+Ofjg0S16avdrQFiLjJvtXJ:bFPmpiif/oc+vXJ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2916-8-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a00000001227e-11.dat	CryptoLocker_rule2
behavioral1/memory/2560-16-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2560-26-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2916-8-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/files/0x000a00000001227e-11.dat	UPX
behavioral1/memory/2560-16-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2560-26-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2560	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
2916	2024-06-02_a3cb329212abae851ee63b2592e417b4_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2916-8-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/files/0x000a00000001227e-11.dat	upx
behavioral1/memory/2560-16-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2560-26-0x0000000008000000-0x000000000800E000-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 2916 wrote to memory of 2560	2916	2024-06-02_a3cb329212abae851ee63b2592e417b4_cryptolocker.exe	28
PID 2916 wrote to memory of 2560	2916	2024-06-02_a3cb329212abae851ee63b2592e417b4_cryptolocker.exe	28
PID 2916 wrote to memory of 2560	2916	2024-06-02_a3cb329212abae851ee63b2592e417b4_cryptolocker.exe	28
PID 2916 wrote to memory of 2560	2916	2024-06-02_a3cb329212abae851ee63b2592e417b4_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-02_a3cb329212abae851ee63b2592e417b4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-02_a3cb329212abae851ee63b2592e417b4_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2916
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2560

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\lossy.exe

Filesize
35KB

MD5
c00ecc8722d69f6a92eea8640ca6f5bf

SHA1
84bf9a8ed14ac028cc2b2338d241d747a3a7aabb

SHA256
841668910eb804daf5e3c7d732e663310abefc2000f89c5f34f485e366c4feb9

SHA512
9d240a3d229e8b5f3da56f073bb54c80ee883d9dc158c8e03c44cae45f5596a9dad7eb2a4778352986ef4424c51c90e4decfb5b5bf3067b25141b207198ba630

Download Submit
memory/2560-16-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2560-18-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/2560-25-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2560-26-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2916-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2916-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2916-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2916-8-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download