077b1756a81caaa3956d2d89fb712ea71310af5ac32490aaba1e72f09819e028

Analysis

max time kernel
149s
max time network
157s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
31/05/2024, 22:56

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General

Target

2024-05-31_d32debcb7f540a35f7953fca91b3cb04_cryptolocker.exe
Size

74KB
MD5

d32debcb7f540a35f7953fca91b3cb04
SHA1

5340b9a88f65db92e51d2556c647f6d0e82f4442
SHA256

077b1756a81caaa3956d2d89fb712ea71310af5ac32490aaba1e72f09819e028
SHA512

354337905fed340eac9a3afda9a7af66843d4e49e49c9844f2a6dcc324d1c7cc1402f0dc1806192e451633933121c9a02fc570580f75ed4bb4315f7912c04031
SSDEEP

1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9Vu:C4Q2c94OtEvwDpj4H8zx

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2920-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1316-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2920-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000e00000001214d-14.dat	CryptoLocker_rule2
behavioral1/memory/1316-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral1/memory/1316-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2920-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1316-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2920-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1316-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2920-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000e00000001214d-14.dat	UPX
behavioral1/memory/1316-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1316	misid.exe

Loads dropped DLL 1 IoCs

pid	Process
2920	2024-05-31_d32debcb7f540a35f7953fca91b3cb04_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2920-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1316-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2920-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000e00000001214d-14.dat	upx
behavioral1/memory/1316-27-0x0000000000500000-0x0000000000510000-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 2920 wrote to memory of 1316	2920	2024-05-31_d32debcb7f540a35f7953fca91b3cb04_cryptolocker.exe	28
PID 2920 wrote to memory of 1316	2920	2024-05-31_d32debcb7f540a35f7953fca91b3cb04_cryptolocker.exe	28
PID 2920 wrote to memory of 1316	2920	2024-05-31_d32debcb7f540a35f7953fca91b3cb04_cryptolocker.exe	28
PID 2920 wrote to memory of 1316	2920	2024-05-31_d32debcb7f540a35f7953fca91b3cb04_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-31_d32debcb7f540a35f7953fca91b3cb04_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_d32debcb7f540a35f7953fca91b3cb04_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2920
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:1316

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
74KB

MD5
37886bf3e765809ad115a21a97991a2f

SHA1
3358f902ea128dc8a53d0c8a44136dadcd3fa119

SHA256
bc64567ff0a051edf6f921ebe7ef7e1145c9e9a97b799652b2d7702feb34ad80

SHA512
74076a169eb929ee58108e147832355d2fb5d5ea60720770cbe49189b6da3b74bae4ccaa6d516bae5df0325ca63a54b7549e1ae93854c826fc6485c12b4e5c11

Download Submit
memory/1316-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1316-19-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1316-26-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/1316-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2920-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2920-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2920-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2920-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2920-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download