ca049f65bd35375f5219be8d64ffe83ec8560e921631b30c032388e057460925

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
10/04/2024, 16:34

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General

Target

2024-04-10_3769be4f198e9b264591b945b4d87be5_cryptolocker.exe
Size

117KB
MD5

3769be4f198e9b264591b945b4d87be5
SHA1

7edf4eb2cfe39d72ab294387cbf1d5c185e8e948
SHA256

ca049f65bd35375f5219be8d64ffe83ec8560e921631b30c032388e057460925
SHA512

7deecaf5a2512c7e7e31308810846a8b5f5b262d373d1cf56abae33324a1db97e5e3dc3581b6a3c183909bceb4ced10a6f2b22da997c28bfdf48951dedb4f33d
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgpYICSC:z6a+CdOOtEvwDpjczl

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/3068-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012329-11.dat	CryptoLocker_rule2
behavioral1/memory/3068-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1988-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1988-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/3068-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000012329-11.dat	CryptoLocker_set1
behavioral1/memory/3068-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1988-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1988-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/3068-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c000000012329-11.dat	UPX
behavioral1/memory/3068-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1988-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1988-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1988	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
3068	2024-04-10_3769be4f198e9b264591b945b4d87be5_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3068-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000c000000012329-11.dat	upx
behavioral1/memory/3068-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1988-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1988-26-0x0000000000500000-0x0000000000510000-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 3068 wrote to memory of 1988	3068	2024-04-10_3769be4f198e9b264591b945b4d87be5_cryptolocker.exe	28
PID 3068 wrote to memory of 1988	3068	2024-04-10_3769be4f198e9b264591b945b4d87be5_cryptolocker.exe	28
PID 3068 wrote to memory of 1988	3068	2024-04-10_3769be4f198e9b264591b945b4d87be5_cryptolocker.exe	28
PID 3068 wrote to memory of 1988	3068	2024-04-10_3769be4f198e9b264591b945b4d87be5_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-10_3769be4f198e9b264591b945b4d87be5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-10_3769be4f198e9b264591b945b4d87be5_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3068
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1988

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
117KB

MD5
c891f061b8964639e74ef73e4289e2ed

SHA1
8077a0b142b28541a23ea6ed7bbb1f1489d92c41

SHA256
5f23308cd65cbb4799a65754d9e9e04d5e3fe0125020878b946f739741274bbe

SHA512
281d1d37422f382ecebf531414dfa3c195def4103a874c9191cc91f9f10d1088ef0c2d9ce2ba3044d5c4541123a7ac1ffe2ba5f6f0a4d5806c035edabb532a6b

Download Submit
memory/1988-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1988-18-0x0000000000350000-0x0000000000356000-memory.dmp

Filesize
24KB

Download
memory/1988-21-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1988-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3068-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3068-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/3068-2-0x0000000000210000-0x0000000000216000-memory.dmp

Filesize
24KB

Download
memory/3068-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/3068-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download