023fe380fbc3bdf1031ebd2a33fd8e60d36431c45bbbaa9ce1dbf9f3fcbd694f

Analysis

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

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
27/05/2024, 02:44

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General

Target

2024-05-27_cf5042c19e5252ff98a1901705db7b5d_cryptolocker.exe
Size

42KB
MD5

cf5042c19e5252ff98a1901705db7b5d
SHA1

7c5883dd18670b8295388411b5e22dd76fe160e1
SHA256

023fe380fbc3bdf1031ebd2a33fd8e60d36431c45bbbaa9ce1dbf9f3fcbd694f
SHA512

a312aaddfab9ab6844f4d14d034313a8530491b2ee29574a4c52561760a1dd974ce234b3671956dc909be7dff773238db89098731685e6ec890a5781577ad086
SSDEEP

384:ba74uGLLQRcsdeQ72ngEr4K7YmE8j6CQYnrz1ZhdaXFXSCVQTLfjDpXqxKHTEXE:ba74zYcgT/EkdCQgpwXFXSqQXfj0xKoU

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2432-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000014120-11.dat	CryptoLocker_rule2
behavioral1/memory/2432-15-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3036-16-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3036-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2432-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/files/0x000a000000014120-11.dat	UPX
behavioral1/memory/2432-15-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/3036-16-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/3036-26-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3036	hasfj.exe

Loads dropped DLL 1 IoCs

pid	Process
2432	2024-05-27_cf5042c19e5252ff98a1901705db7b5d_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2432-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/files/0x000a000000014120-11.dat	upx
behavioral1/memory/2432-15-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/3036-16-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/3036-26-0x0000000008000000-0x000000000800F000-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 2432 wrote to memory of 3036	2432	2024-05-27_cf5042c19e5252ff98a1901705db7b5d_cryptolocker.exe	28
PID 2432 wrote to memory of 3036	2432	2024-05-27_cf5042c19e5252ff98a1901705db7b5d_cryptolocker.exe	28
PID 2432 wrote to memory of 3036	2432	2024-05-27_cf5042c19e5252ff98a1901705db7b5d_cryptolocker.exe	28
PID 2432 wrote to memory of 3036	2432	2024-05-27_cf5042c19e5252ff98a1901705db7b5d_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-27_cf5042c19e5252ff98a1901705db7b5d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_cf5042c19e5252ff98a1901705db7b5d_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2432
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:3036

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\hasfj.exe

Filesize
42KB

MD5
e407ed5a43b61e0009ceef3f72b2ac9f

SHA1
be6f8555994fc02e3612fe920e0d0ade52f17bef

SHA256
c52eee54a141348c5837920900ddc43e8b7722569dbe05d031fc53b1fc2154b4

SHA512
c8aed99ae1c46504c7a39856feff2351198c12e1a6090962622681b1bc723295bf745202f81699883915a380c7d4766500d93c0356ba4950bdbf4ad06124b65e

Download Submit
memory/2432-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2432-1-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2432-2-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download
memory/2432-9-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2432-15-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3036-16-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3036-18-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/3036-19-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/3036-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download