2b11af62aaf90b44d70a14e3c017000c9ee414d499f6af6768de318b6f9b45e9

Analysis

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

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
03/06/2024, 19:48

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General

Target

2b11af62aaf90b44d70a14e3c017000c9ee414d499f6af6768de318b6f9b45e9.exe
Size

67KB
MD5

0fea035c8281b2aab607c642538e99d3
SHA1

b3cd9e83bfd2355e0ec5621944e6a9b7ef715ae7
SHA256

2b11af62aaf90b44d70a14e3c017000c9ee414d499f6af6768de318b6f9b45e9
SHA512

7ab20b8ca66e7b975da89328fa42012e7e8bae86d7ab644718759ceead1e0798de215e96ae69b5ad229bbbf64c7fb82877b1a92e39ab0774a401738e5c50984d
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAoQRz:1nK6a+qdOOtEvwDpj6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1616-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d00000001232c-11.dat	CryptoLocker_rule2
behavioral1/memory/1616-14-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2552-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2552-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1616-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d00000001232c-11.dat	CryptoLocker_set1
behavioral1/memory/1616-14-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2552-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2552-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1616-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000d00000001232c-11.dat	UPX
behavioral1/memory/1616-14-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2552-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2552-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2552	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1616	2b11af62aaf90b44d70a14e3c017000c9ee414d499f6af6768de318b6f9b45e9.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1616-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000d00000001232c-11.dat	upx
behavioral1/memory/1616-14-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2552-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2552-26-0x0000000000500000-0x000000000050F311-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 1616 wrote to memory of 2552	1616	2b11af62aaf90b44d70a14e3c017000c9ee414d499f6af6768de318b6f9b45e9.exe	28
PID 1616 wrote to memory of 2552	1616	2b11af62aaf90b44d70a14e3c017000c9ee414d499f6af6768de318b6f9b45e9.exe	28
PID 1616 wrote to memory of 2552	1616	2b11af62aaf90b44d70a14e3c017000c9ee414d499f6af6768de318b6f9b45e9.exe	28
PID 1616 wrote to memory of 2552	1616	2b11af62aaf90b44d70a14e3c017000c9ee414d499f6af6768de318b6f9b45e9.exe	28

C:\Users\Admin\AppData\Local\Temp\2b11af62aaf90b44d70a14e3c017000c9ee414d499f6af6768de318b6f9b45e9.exe
"C:\Users\Admin\AppData\Local\Temp\2b11af62aaf90b44d70a14e3c017000c9ee414d499f6af6768de318b6f9b45e9.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1616
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2552

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
67KB

MD5
5ab587600d36e7bd2ed1a86af7939772

SHA1
5e01ab7e812572a1b2b7ab4d53e17730190dd9f7

SHA256
4fdf3fdbb8711869f9ecf200390d48028d1fe6dab748e091c200c3f39e303dea

SHA512
26b4da669b76af017a73add0e184322bd1f741274103094a7657321abcced0845bd6f1435ceb207393348f1a40788cc2ddac90bb8f7e8edc26066d0c3653bb78

Download Submit
memory/1616-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1616-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1616-2-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1616-3-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/1616-14-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2552-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2552-18-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2552-25-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2552-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download