03ba8637eff0e525a6d7b0f56e5523fac3d62820e273422e7358c33c180104bd

General

Target

2024-04-08_4ff20115fcea58f42add40dda3ac94fd_cryptolocker.exe
Size

59KB
MD5

4ff20115fcea58f42add40dda3ac94fd
SHA1

557647d50531222849b5d4fa6fa3199ac7eacfe9
SHA256

03ba8637eff0e525a6d7b0f56e5523fac3d62820e273422e7358c33c180104bd
SHA512

c5e93d19d3ba2ddbcc18d5cae57b84cb46b0965989935484fb9874f07bc5a5320571ebdde50a7deebb4bd0428f9501c94ebeff137b8a1cd04fca035db74fe460
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5appOtu:z6QFElP6n+gKmddpMOtEvwDpj9aYaj

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1912-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b00000001223a-11.dat	CryptoLocker_rule2
behavioral1/memory/1912-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2508-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1912-13-0x0000000002A80000-0x0000000002A90000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2508-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/1912-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b00000001223a-11.dat	CryptoLocker_set1
behavioral1/memory/1912-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2508-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1912-13-0x0000000002A80000-0x0000000002A90000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2508-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/1912-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b00000001223a-11.dat	UPX
behavioral1/memory/1912-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2508-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1912-13-0x0000000002A80000-0x0000000002A90000-memory.dmp	UPX
behavioral1/memory/2508-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2508	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1912	2024-04-08_4ff20115fcea58f42add40dda3ac94fd_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1912-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b00000001223a-11.dat	upx
behavioral1/memory/1912-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2508-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1912-13-0x0000000002A80000-0x0000000002A90000-memory.dmp	upx
behavioral1/memory/2508-27-0x0000000000500000-0x0000000000510000-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 1912 wrote to memory of 2508	1912	2024-04-08_4ff20115fcea58f42add40dda3ac94fd_cryptolocker.exe	28
PID 1912 wrote to memory of 2508	1912	2024-04-08_4ff20115fcea58f42add40dda3ac94fd_cryptolocker.exe	28
PID 1912 wrote to memory of 2508	1912	2024-04-08_4ff20115fcea58f42add40dda3ac94fd_cryptolocker.exe	28
PID 1912 wrote to memory of 2508	1912	2024-04-08_4ff20115fcea58f42add40dda3ac94fd_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-08_4ff20115fcea58f42add40dda3ac94fd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-08_4ff20115fcea58f42add40dda3ac94fd_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1912
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2508

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
59KB

MD5
408f71f4d090608cb75aa3162081c44f

SHA1
e75bf60b4634b1346faff9111128f02372cde26e

SHA256
a10ad50c19b84821ef3aacb52dd9d1a2931a6c4d0915b3e69564ae3ae1c736ec

SHA512
7b1f15fe8bd641090a448138d3cdfb45f4a828d5398903e2356c8cf04def96044a7fbb3fbfd7c40a34c1eab33bae9606a5ab177bd9e274c35237fd1f9be3c944

Download Submit
memory/1912-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1912-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1912-2-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/1912-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1912-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1912-13-0x0000000002A80000-0x0000000002A90000-memory.dmp

Filesize
64KB

Download
memory/2508-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2508-19-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2508-21-0x0000000000430000-0x0000000000436000-memory.dmp

Filesize
24KB

Download
memory/2508-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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