01c7e39c39f1967e32631a6d1179f97153097c63a6b7ca26a9fa877716b25d24

General

Target

2024-05-03_6f9eccfd46aee3f81037461555a13c42_cryptolocker.exe
Size

80KB
MD5

6f9eccfd46aee3f81037461555a13c42
SHA1

a5011f54d35dc2301a3bb0dd1d431af22ce2bbd4
SHA256

01c7e39c39f1967e32631a6d1179f97153097c63a6b7ca26a9fa877716b25d24
SHA512

21f4f4f282ac406a97fe3e3603fb1748803f5442bd6f355f5266807c2416c15613c2042b5cab24a1852ad103b1c34952f3c07548aea56f93c1ee0c5c146b35f8
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7QpU:zCsanOtEvwDpjq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1368-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b0000000155e2-11.dat	CryptoLocker_rule2
behavioral1/memory/2900-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1368-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1368-13-0x0000000002480000-0x0000000002490000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2900-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/1368-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b0000000155e2-11.dat	CryptoLocker_set1
behavioral1/memory/2900-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1368-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1368-13-0x0000000002480000-0x0000000002490000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2900-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/1368-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b0000000155e2-11.dat	UPX
behavioral1/memory/2900-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1368-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1368-13-0x0000000002480000-0x0000000002490000-memory.dmp	UPX
behavioral1/memory/2900-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2900	misid.exe

Loads dropped DLL 1 IoCs

pid	Process
1368	2024-05-03_6f9eccfd46aee3f81037461555a13c42_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1368-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b0000000155e2-11.dat	upx
behavioral1/memory/2900-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1368-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1368-13-0x0000000002480000-0x0000000002490000-memory.dmp	upx
behavioral1/memory/2900-27-0x0000000000500000-0x0000000000510000-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 1368 wrote to memory of 2900	1368	2024-05-03_6f9eccfd46aee3f81037461555a13c42_cryptolocker.exe	28
PID 1368 wrote to memory of 2900	1368	2024-05-03_6f9eccfd46aee3f81037461555a13c42_cryptolocker.exe	28
PID 1368 wrote to memory of 2900	1368	2024-05-03_6f9eccfd46aee3f81037461555a13c42_cryptolocker.exe	28
PID 1368 wrote to memory of 2900	1368	2024-05-03_6f9eccfd46aee3f81037461555a13c42_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-03_6f9eccfd46aee3f81037461555a13c42_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_6f9eccfd46aee3f81037461555a13c42_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1368
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:2900

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\misid.exe

Filesize
80KB

MD5
9641e5d8637249bc689c2ee2e48c4f59

SHA1
c0bbd5fdc203cdd64208f53c4454ab59556cf925

SHA256
e3d5c891c37712937f43a67585890089d9bebe0ec25fc94d6aa17d684f5cb2c2

SHA512
06371d8645f7eb5dac9436e0383764aad8cafcfe0ac7039e3b0d5b1d39db9611ebff520a6497165528952eea2b2457ec60593ec1936008520836dc4a33ff33ff

Download Submit
memory/1368-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1368-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1368-3-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/1368-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1368-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1368-13-0x0000000002480000-0x0000000002490000-memory.dmp

Filesize
64KB

Download
memory/2900-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2900-26-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2900-19-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2900-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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