ae90896ec56f1870da6732c468eb7c723d8913d3a3de6eb710a259670eb23ccb

General

Target

2024-03-18_30f05bcda962983978e77992e3678b8c_cryptolocker.exe
Size

58KB
MD5

30f05bcda962983978e77992e3678b8c
SHA1

978a71064b0989978696e85b9eedac24b387e6d2
SHA256

ae90896ec56f1870da6732c468eb7c723d8913d3a3de6eb710a259670eb23ccb
SHA512

a8dfca61629d04902925414ea6d078b60de49ca04cea654dde895103c77622b21ebe34249e205c32eb07f8050214998dbcec0f608c168fc13c300c57fc86e9ed
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5appB:z6QFElP6n+gKmddpMOtEvwDpj9aYaR

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2224-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000012266-11.dat	CryptoLocker_rule2
behavioral1/memory/2224-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2520-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2224-13-0x0000000000680000-0x0000000000690000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2520-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2224-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a000000012266-11.dat	CryptoLocker_set1
behavioral1/memory/2224-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2520-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2224-13-0x0000000000680000-0x0000000000690000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2520-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2224-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000a000000012266-11.dat	UPX
behavioral1/memory/2224-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2520-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2224-13-0x0000000000680000-0x0000000000690000-memory.dmp	UPX
behavioral1/memory/2520-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2520	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2224	2024-03-18_30f05bcda962983978e77992e3678b8c_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2224-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000a000000012266-11.dat	upx
behavioral1/memory/2224-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2520-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2224-13-0x0000000000680000-0x0000000000690000-memory.dmp	upx
behavioral1/memory/2520-27-0x0000000000500000-0x0000000000510000-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 2224 wrote to memory of 2520	2224	2024-03-18_30f05bcda962983978e77992e3678b8c_cryptolocker.exe	28
PID 2224 wrote to memory of 2520	2224	2024-03-18_30f05bcda962983978e77992e3678b8c_cryptolocker.exe	28
PID 2224 wrote to memory of 2520	2224	2024-03-18_30f05bcda962983978e77992e3678b8c_cryptolocker.exe	28
PID 2224 wrote to memory of 2520	2224	2024-03-18_30f05bcda962983978e77992e3678b8c_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-18_30f05bcda962983978e77992e3678b8c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-18_30f05bcda962983978e77992e3678b8c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2224
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2520

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
58KB

MD5
9cbf36c8d624e7d35156fc78c28737be

SHA1
6c44da4b8e869b87d82dc8d444e77ff61748a86c

SHA256
f83a5784288d91acfa47ed724048013b5531c77da746fcb6dfc80476486c605f

SHA512
fd555af44b4be66f53465a3e5d7fea7a7b259cb9f59ce1e6a08a171da5abcc9aaa8dac23a11513d9d7fd373eae91476ad8c50815bd6eee2a8a3006d57cc919f6

Download Submit
memory/2224-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2224-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2224-2-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2224-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2224-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2224-13-0x0000000000680000-0x0000000000690000-memory.dmp

Filesize
64KB

Download
memory/2520-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2520-19-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2520-23-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2520-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing