d5cb9a3212768113db20f53409e9bf3b084a399e32f71c2af5e3a0a14f2116d8

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 21:53

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General

Target

2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe
Size

64KB
MD5

b74b50566216c4b027b6730633c26615
SHA1

48025bab3abd3884c664ae21c1b98c11f9eff1e7
SHA256

d5cb9a3212768113db20f53409e9bf3b084a399e32f71c2af5e3a0a14f2116d8
SHA512

d7560e59fab7605ee4e93d1bf57829b0ca7eb9cedf6e3a5c3b84fc7ee4946b0d289b34ee8e7e042767865e587d6ca189b35ae9842de4fd4cbde70a60e77be9ac
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiW:BbdDmjr+OtEvwDpjM8D

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1084-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1084-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2300-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2300-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1084-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1084-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2300-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2300-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1084-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1084-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2300-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2300-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2300 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe

pid process

1084 2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2300	asih.exe

pid	process
1084	2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe

description	pid	process	target process
PID 1084 wrote to memory of 2300	1084	2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe	asih.exe
PID 1084 wrote to memory of 2300	1084	2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe	asih.exe
PID 1084 wrote to memory of 2300	1084	2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe	asih.exe
PID 1084 wrote to memory of 2300	1084	2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1084
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2300

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
64KB

MD5
4010efe37df4ed8a17f9aacd2a92e6f8

SHA1
90338f594dcf40d02b4a3002c0bf643aa2ca6a8a

SHA256
e58e2a77e205e6cfcaadaf75b49e8da2a5c627821c871c5a4064e8c60bb4cf0a

SHA512
d70bb3a602eac51cc43a2e2a1877ca32177effca38f273149e3fb02732821d354d67f6def464e374bc25f3a1a7fe90b9cd257384a80950c08e15700388486cf9

Download Submit
memory/1084-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1084-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1084-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/1084-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1084-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2300-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2300-19-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2300-20-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2300-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download