c83729f157c88f74c52c2cb93a4d665be1300f565b0f6d1f9459997d599e706c

General

Target

2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe
Size

80KB
MD5

76324d9a531f0692e61d805efb265085
SHA1

2143f1017b99d63a2ed332e2e648707a06466905
SHA256

c83729f157c88f74c52c2cb93a4d665be1300f565b0f6d1f9459997d599e706c
SHA512

251be0d0b6d6cce2d7195aeeaac61ee68ae2e09589a130f09e840d4a9b883ad737177a1d8b8dded6245d1a2fe25b181fd7fdae0a0fa26c2a288d1e09b140e0ec
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdWa:T6a+rdOOtEvwDpjNt9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2564-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2564-13-0x0000000002480000-0x0000000002490000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0034000000015c8d-11.dat	CryptoLocker_rule2
behavioral1/memory/2564-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2952-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2952-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2564-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2564-13-0x0000000002480000-0x0000000002490000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0034000000015c8d-11.dat	CryptoLocker_set1
behavioral1/memory/2564-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2952-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2952-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2564-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2564-13-0x0000000002480000-0x0000000002490000-memory.dmp	UPX
behavioral1/files/0x0034000000015c8d-11.dat	UPX
behavioral1/memory/2564-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2952-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2952-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2952	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2564	2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2564-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2564-13-0x0000000002480000-0x0000000002490000-memory.dmp	upx
behavioral1/files/0x0034000000015c8d-11.dat	upx
behavioral1/memory/2564-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2952-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2952-28-0x0000000000500000-0x0000000000510000-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 2564 wrote to memory of 2952	2564	2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe	29
PID 2564 wrote to memory of 2952	2564	2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe	29
PID 2564 wrote to memory of 2952	2564	2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe	29
PID 2564 wrote to memory of 2952	2564	2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2564
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2952

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

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Downloads

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

Filesize
80KB

MD5
510a08cd34ed958d1a810c5fb0b2094e

SHA1
19b44e4ddaddee07adcd8da0b83ecbad7b5498c0

SHA256
25959f242a4ae72572e7d9d6618389df3f742875ec088c8d5da42633d8a4fa68

SHA512
4fb53b0be3d30a076b82dc811ee23e090235601a0a984ea81a874eb2e5bfa409e3a0bf408c308cbf6080c645619009c1187d42b1144ed2d26f664bad64c281ac

Download Submit
memory/2564-0-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2564-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2564-2-0x0000000000200000-0x0000000000206000-memory.dmp

Filesize
24KB

Download
memory/2564-4-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2564-13-0x0000000002480000-0x0000000002490000-memory.dmp

Filesize
64KB

Download
memory/2564-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2564-27-0x0000000002480000-0x0000000002490000-memory.dmp

Filesize
64KB

Download
memory/2952-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2952-19-0x00000000002E0000-0x00000000002E6000-memory.dmp

Filesize
24KB

Download
memory/2952-21-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2952-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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