922beff7d0039ea77218ebd476dbfa9e6d5f362f7da24f66e770afbab7b23ddd

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
29/05/2024, 19:34

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General

Target

2024-05-29_e21cf5ab68b83135c0e081b434e84ac7_cryptolocker.exe
Size

78KB
MD5

e21cf5ab68b83135c0e081b434e84ac7
SHA1

3c5ada040277b6035113014cf93d68bff61490d8
SHA256

922beff7d0039ea77218ebd476dbfa9e6d5f362f7da24f66e770afbab7b23ddd
SHA512

b0a56e4a24e9141ad33d2c26671d54f4e99507657a77ea181e4540ef1e3e1bf2717a23a5d26a48bda9f59362cf9b47870a0468a6c6f024d7dc0ae38e01d5c433
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxnA:T6a+rdOOtEvwDpjNtHP3

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1968-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000016056-11.dat	CryptoLocker_rule2
behavioral1/memory/1968-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1936-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1936-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1968-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000016056-11.dat	CryptoLocker_set1
behavioral1/memory/1968-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1936-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1936-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1968-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000016056-11.dat	UPX
behavioral1/memory/1968-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1936-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1936-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1936	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1968	2024-05-29_e21cf5ab68b83135c0e081b434e84ac7_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1968-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000016056-11.dat	upx
behavioral1/memory/1968-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1936-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1936-26-0x0000000000500000-0x0000000000510000-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 1968 wrote to memory of 1936	1968	2024-05-29_e21cf5ab68b83135c0e081b434e84ac7_cryptolocker.exe	28
PID 1968 wrote to memory of 1936	1968	2024-05-29_e21cf5ab68b83135c0e081b434e84ac7_cryptolocker.exe	28
PID 1968 wrote to memory of 1936	1968	2024-05-29_e21cf5ab68b83135c0e081b434e84ac7_cryptolocker.exe	28
PID 1968 wrote to memory of 1936	1968	2024-05-29_e21cf5ab68b83135c0e081b434e84ac7_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-29_e21cf5ab68b83135c0e081b434e84ac7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_e21cf5ab68b83135c0e081b434e84ac7_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1968
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1936

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
78KB

MD5
1498c6da3bf233ee095bde6ac141065c

SHA1
f757b79ca436ab33cb99be38cc67ef554d4a0f9d

SHA256
176ff5e47eb4ff25866f3a2342c187fe86aff866e09a83fe72d29761052c8eaf

SHA512
22568f3bfec9d00485447de40bdad5a7b4bb81375bf713813f585693524fda6f22a18de827be074248173ccff1068480d35dd949368ddc0f76de2e70b9222c23

Download Submit
memory/1936-25-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/1936-18-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/1936-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1936-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1968-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1968-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1968-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1968-2-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1968-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download