fc803b107ad9dacaf781f5567c64c99142c2a4d44ee3bbc23d771447de6809ed

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
09/04/2024, 03:27

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General

Target

2024-04-09_0aa234801955fe89cb4312bb237fbec5_cryptolocker.exe
Size

45KB
MD5

0aa234801955fe89cb4312bb237fbec5
SHA1

ffea535af304da243d258b52da33e3b07de390ea
SHA256

fc803b107ad9dacaf781f5567c64c99142c2a4d44ee3bbc23d771447de6809ed
SHA512

814d702e7a889a4a8f592dd5f28cd079365a2828146cac17c74cadbeedf9b3a46d2e8a45d148249e61d30df4dcb93ea331d77bd73b4db8c5fac354a909caf854
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoLn:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ9

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2868-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b00000001224c-11.dat	CryptoLocker_rule2
behavioral1/memory/2868-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2256-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2256-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral1/memory/2868-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2256-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2256-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2868-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b00000001224c-11.dat	UPX
behavioral1/memory/2868-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2256-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2256-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2256	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2868	2024-04-09_0aa234801955fe89cb4312bb237fbec5_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 2868 wrote to memory of 2256	2868	2024-04-09_0aa234801955fe89cb4312bb237fbec5_cryptolocker.exe	28
PID 2868 wrote to memory of 2256	2868	2024-04-09_0aa234801955fe89cb4312bb237fbec5_cryptolocker.exe	28
PID 2868 wrote to memory of 2256	2868	2024-04-09_0aa234801955fe89cb4312bb237fbec5_cryptolocker.exe	28
PID 2868 wrote to memory of 2256	2868	2024-04-09_0aa234801955fe89cb4312bb237fbec5_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-09_0aa234801955fe89cb4312bb237fbec5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-09_0aa234801955fe89cb4312bb237fbec5_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2256

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
46KB

MD5
7ac0aedf06b1ec68872b7dbe8799affa

SHA1
da7b7f43660e53ae3bb5d72997d6230e8288b380

SHA256
6082c2e7358f3628ee5ae6e5d5e234340ed2d2a0a1cc38b780266e1ba8667b56

SHA512
8168d41a9f13bb65cf6211c01342d7c27da1a00011b156eebf618d7364cd5371a3ecb6c72dfb26fd5c09b3d8bd484da71b8789115718a03372d57fbce4235139

Download Submit
memory/2256-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2256-20-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2256-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2868-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2868-1-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2868-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2868-8-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2868-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download