12d3bfe702d11e779725e7f92daedab3395185f96c2e75be115f7f3e54da2394

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
12/03/2024, 10:25

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General

Target

2024-03-12_02203404e98eb10ffba6e6e94de2ca59_cryptolocker.exe
Size

108KB
MD5

02203404e98eb10ffba6e6e94de2ca59
SHA1

38573c57844f0433a00841795e60cd28b2f35387
SHA256

12d3bfe702d11e779725e7f92daedab3395185f96c2e75be115f7f3e54da2394
SHA512

d99f98096d7f7f154c60c6f4d9ed9d0a0da725271358c5ffdbd1fab668677db5cd1800830fe54b3beafa2fb266446a595c0f31f7f391fda1e4f18b052d245052
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GkszfW:1nK6a+qdOOtEvwDpj6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1072-1-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b0000000139e0-11.dat	CryptoLocker_rule2
behavioral1/memory/1072-13-0x00000000005D0000-0x00000000005E0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1072-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1968-19-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1072-1-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b0000000139e0-11.dat	CryptoLocker_set1
behavioral1/memory/1072-13-0x00000000005D0000-0x00000000005E0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1072-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/1968-19-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1072-1-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000b0000000139e0-11.dat	UPX
behavioral1/memory/1072-13-0x00000000005D0000-0x00000000005E0000-memory.dmp	UPX
behavioral1/memory/1072-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/1968-19-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1968	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1072	2024-03-12_02203404e98eb10ffba6e6e94de2ca59_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1072-1-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000b0000000139e0-11.dat	upx
behavioral1/memory/1072-13-0x00000000005D0000-0x00000000005E0000-memory.dmp	upx
behavioral1/memory/1072-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/1968-19-0x0000000000500000-0x000000000050F311-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 1072 wrote to memory of 1968	1072	2024-03-12_02203404e98eb10ffba6e6e94de2ca59_cryptolocker.exe	28
PID 1072 wrote to memory of 1968	1072	2024-03-12_02203404e98eb10ffba6e6e94de2ca59_cryptolocker.exe	28
PID 1072 wrote to memory of 1968	1072	2024-03-12_02203404e98eb10ffba6e6e94de2ca59_cryptolocker.exe	28
PID 1072 wrote to memory of 1968	1072	2024-03-12_02203404e98eb10ffba6e6e94de2ca59_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-12_02203404e98eb10ffba6e6e94de2ca59_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-12_02203404e98eb10ffba6e6e94de2ca59_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1072
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1968

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
108KB

MD5
02e360eed674f0a45ef50d44a8772673

SHA1
74e7fa739beb0751ff7bac43e0e93d09dfb300dd

SHA256
6c52dec76ae84c3f4944a47a91a21f96179d76de46bd1aaffe1e8a13068526c6

SHA512
13f5eac893fcd45ebb8d1f9b82b0f8a6c6d07c9be9a373851cd1dc054542183fec0281536719f5caab3eb1758e79ca02cee8b71fb10e5d9edbfdcfec161d633c

Download Submit
memory/1072-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1072-1-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1072-2-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1072-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1072-13-0x00000000005D0000-0x00000000005E0000-memory.dmp

Filesize
64KB

Download
memory/1072-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1968-18-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/1968-19-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download