d672f8dd566ed7c042591df0493f529cb233f47533183f8e2497a1e62903e712

Analysis

max time kernel
148s
max time network
152s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
08/04/2024, 15:47

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General

Target

2024-04-08_f22c89b807d44433ba84c073fa421a56_cryptolocker.exe
Size

53KB
MD5

f22c89b807d44433ba84c073fa421a56
SHA1

795c5cb0c2178b11a8cbd7e212153d3600376763
SHA256

d672f8dd566ed7c042591df0493f529cb233f47533183f8e2497a1e62903e712
SHA512

6a42aa7f2f8ecbd8843bb7811d08243f227a65275ec5a88d9794ac6726b132d3c7c83814bad99a10424e8c3ed11f6c35ff843cdf9ca5e1be71a582ce01aed1c1
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb6Impys:BbdDmjr+OtEvwDpjMH

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1688-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000900000001447e-14.dat	CryptoLocker_rule2
behavioral1/memory/1688-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1756-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1756-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/1688-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1688-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1756-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1756-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1688-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000900000001447e-14.dat	UPX
behavioral1/memory/1688-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1756-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1756-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1756	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1688	2024-04-08_f22c89b807d44433ba84c073fa421a56_cryptolocker.exe

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 1688 wrote to memory of 1756	1688	2024-04-08_f22c89b807d44433ba84c073fa421a56_cryptolocker.exe	28
PID 1688 wrote to memory of 1756	1688	2024-04-08_f22c89b807d44433ba84c073fa421a56_cryptolocker.exe	28
PID 1688 wrote to memory of 1756	1688	2024-04-08_f22c89b807d44433ba84c073fa421a56_cryptolocker.exe	28
PID 1688 wrote to memory of 1756	1688	2024-04-08_f22c89b807d44433ba84c073fa421a56_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-08_f22c89b807d44433ba84c073fa421a56_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-08_f22c89b807d44433ba84c073fa421a56_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1688
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1756

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\asih.exe

Filesize
53KB

MD5
36e7b152299d165c49d9bcadb674ade1

SHA1
94413f7cef8957dd5af05227fa38bb831ef34119

SHA256
5864575e9c39745daf603ec3841f8d250fb3538b389188c0061b07a3d9d69762

SHA512
0644fee31b61abfb8d77f70bcaff4b25cbca67f25b75ec21e25d9ca5c124436f2c7b21a00b40a608a82e6eee651c5c1deb9c5381ef023fcd517aa2ee2eca1cb0

Download Submit
memory/1688-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1688-2-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/1688-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1688-3-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1688-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1756-18-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1756-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1756-20-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1756-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download