173c5b788b151faca47fdd38ac932d588d016e5748547e71bb395dda0a9608e5

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23/02/2024, 10:39

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General

Target

2024-02-23_43c7da0ef74fbb172da10a20d680a6a7_cryptolocker.exe
Size

49KB
MD5

43c7da0ef74fbb172da10a20d680a6a7
SHA1

171aba3160296275c400a1be8a72be9277b3ca1a
SHA256

173c5b788b151faca47fdd38ac932d588d016e5748547e71bb395dda0a9608e5
SHA512

aa20cdbb285cb933206f8d5026e0ad37a5af39280349341e27cbb1e7180e66c21e775476f3067459146c3b0742b6bbeb20fa635d7648ae263923d566070bcc97
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQPdUvQ:BbdDmjr+OtEvwDpjMXx

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2220-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b0000000122b8-11.dat	CryptoLocker_rule2
behavioral1/memory/2220-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2380-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2380-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral1/memory/2220-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2380-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2380-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2220-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b0000000122b8-11.dat	UPX
behavioral1/memory/2220-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2380-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2380-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2380	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2220	2024-02-23_43c7da0ef74fbb172da10a20d680a6a7_cryptolocker.exe

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 2220 wrote to memory of 2380	2220	2024-02-23_43c7da0ef74fbb172da10a20d680a6a7_cryptolocker.exe	28
PID 2220 wrote to memory of 2380	2220	2024-02-23_43c7da0ef74fbb172da10a20d680a6a7_cryptolocker.exe	28
PID 2220 wrote to memory of 2380	2220	2024-02-23_43c7da0ef74fbb172da10a20d680a6a7_cryptolocker.exe	28
PID 2220 wrote to memory of 2380	2220	2024-02-23_43c7da0ef74fbb172da10a20d680a6a7_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-23_43c7da0ef74fbb172da10a20d680a6a7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_43c7da0ef74fbb172da10a20d680a6a7_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2220
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
49KB

MD5
9d933aaeeb4dafa839369a7f3f7cdf41

SHA1
b657e9dba6850b9a20ed571de83e8b42bca20205

SHA256
07edd7d915fa0d75ebf904727768bcc3f7a98ef3a6af6f27504208cbef42b241

SHA512
c3746608c53a6b2d235b8b23c1f993d9775ee1f2a869bd2d7c1c4b475a83acfa44a8609005d0b31235cb45e8cfcd4c4061d366f54b8dd0f925b44e5f5a219eb8

Download Submit
memory/2220-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2220-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2220-2-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2220-5-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2220-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2380-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2380-18-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/2380-21-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2380-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download