d0ac618a4467497694b6af9e35aa1a343c8092b881848fc5b6176bfd43cedd67

General

Target

2024-02-24_65e2a346d37c51398f49725d87406e2b_cryptolocker.exe
Size

77KB
MD5

65e2a346d37c51398f49725d87406e2b
SHA1

82963cef9c101a543fd57fd323aedbf76e3385af
SHA256

d0ac618a4467497694b6af9e35aa1a343c8092b881848fc5b6176bfd43cedd67
SHA512

1703c37181c9b41143f0ad33efdad7e760c7c6f79906d10a4236f3008933396eeffe09f7018870858386fb2edf5da9533b883d27075f1aeaef9b503f2e51e164
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1kya8:zCsanOtEvwDpjO

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2860-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000012254-11.dat	CryptoLocker_rule2
behavioral1/memory/2860-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2688-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2860-14-0x0000000002880000-0x0000000002890000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2688-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2860-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a000000012254-11.dat	CryptoLocker_set1
behavioral1/memory/2860-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2688-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2688-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2860-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000a000000012254-11.dat	UPX
behavioral1/memory/2860-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2688-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2860-14-0x0000000002880000-0x0000000002890000-memory.dmp	UPX
behavioral1/memory/2688-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2688	misid.exe

Loads dropped DLL 1 IoCs

pid	Process
2860	2024-02-24_65e2a346d37c51398f49725d87406e2b_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2860-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000a000000012254-11.dat	upx
behavioral1/memory/2860-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2688-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2688-28-0x0000000000500000-0x0000000000510000-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 2860 wrote to memory of 2688	2860	2024-02-24_65e2a346d37c51398f49725d87406e2b_cryptolocker.exe	28
PID 2860 wrote to memory of 2688	2860	2024-02-24_65e2a346d37c51398f49725d87406e2b_cryptolocker.exe	28
PID 2860 wrote to memory of 2688	2860	2024-02-24_65e2a346d37c51398f49725d87406e2b_cryptolocker.exe	28
PID 2860 wrote to memory of 2688	2860	2024-02-24_65e2a346d37c51398f49725d87406e2b_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-24_65e2a346d37c51398f49725d87406e2b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-24_65e2a346d37c51398f49725d87406e2b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2860
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:2688

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\misid.exe

Filesize
78KB

MD5
c7e51a84bed91e6d5cf910c0ec986e1a

SHA1
3cc3988f10a1d4a81ed8fc4239e568802cd5c865

SHA256
081e20e16c70366018a532d2465d7b897d3f11c98882731d768c82f0f68d4b8c

SHA512
a9d03700c9570c4312dbf05f5bb8d4dfc84a843b9f43dfbb6315390eace8aa87f11fe14c52153280e6f1797fec15b6244292bbe752577a0a49a7f709b49d5654

Download Submit
memory/2688-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2688-19-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2688-21-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2688-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2860-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2860-0-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/2860-2-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/2860-4-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/2860-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2860-14-0x0000000002880000-0x0000000002890000-memory.dmp

Filesize
64KB

Download
memory/2860-27-0x0000000002880000-0x0000000002890000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing