31bc5ea1822460f6a768c4bc9e803bb8c8bb2899c6c0895d9ac4825fd9923091

Analysis

max time kernel
155s
max time network
162s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
14/03/2024, 10:30

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General

Target

2024-03-14_2fd33a8e4bf12160accb227b315702d4_cryptolocker.exe
Size

91KB
MD5

2fd33a8e4bf12160accb227b315702d4
SHA1

886e1307123f93a3932477e82ade45c29eafd579
SHA256

31bc5ea1822460f6a768c4bc9e803bb8c8bb2899c6c0895d9ac4825fd9923091
SHA512

28a7394764361f22b6a5c03195482a67ae63a5a22d7f6abee074f5aca8c614a3c6c95c9c975975f13531e59d112b9db3ad0bc36fc401ddb91a7cb3fb98f939a0
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRMy87Uv5:zCsanOtEvwDpjA

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2816-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000012252-14.dat	CryptoLocker_rule2
behavioral1/memory/2816-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2936-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2936-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2816-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000012252-14.dat	CryptoLocker_set1
behavioral1/memory/2816-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2936-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2936-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2816-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000012252-14.dat	UPX
behavioral1/memory/2816-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2936-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2936-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2936	misid.exe

Loads dropped DLL 1 IoCs

pid	Process
2816	2024-03-14_2fd33a8e4bf12160accb227b315702d4_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2816-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000012252-14.dat	upx
behavioral1/memory/2816-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2936-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2936-27-0x0000000000500000-0x0000000000510000-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 2816 wrote to memory of 2936	2816	2024-03-14_2fd33a8e4bf12160accb227b315702d4_cryptolocker.exe	28
PID 2816 wrote to memory of 2936	2816	2024-03-14_2fd33a8e4bf12160accb227b315702d4_cryptolocker.exe	28
PID 2816 wrote to memory of 2936	2816	2024-03-14_2fd33a8e4bf12160accb227b315702d4_cryptolocker.exe	28
PID 2816 wrote to memory of 2936	2816	2024-03-14_2fd33a8e4bf12160accb227b315702d4_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-14_2fd33a8e4bf12160accb227b315702d4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_2fd33a8e4bf12160accb227b315702d4_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:2936

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

C:\Users\Admin\AppData\Local\Temp\misid.exe

Filesize
91KB

MD5
3d595ed3bea8d607dd07a8e4f3531c51

SHA1
0dbb71d3553d5e677868fe491bcca31450bd8720

SHA256
cfabc8ae21aab0646c853ae7ca2351919cd0b0e6c484fb9d7ab144c28ea70047

SHA512
37ed6c2807408f48924ecb9392271d5e93b68e0a106315d063c254e4c695d10a288b9d8080c5db2be06fafc27474eb158eab1ff8d4d363c3f1b6309c51189784

Download Submit
memory/2816-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2816-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2816-2-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2816-4-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2816-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2816-16-0x00000000004F0000-0x0000000000500000-memory.dmp

Filesize
64KB

Download
memory/2816-26-0x00000000004F0000-0x0000000000500000-memory.dmp

Filesize
64KB

Download
memory/2936-19-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2936-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2936-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download