337693c33da7eec0b97a6d335a7fd23a0eecf48c06cd1f2e98867a2c6b914c9b

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
23/01/2024, 17:45

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General

Target

2024-01-23_28a6474a9964657fb8c736cfd198b262_cryptolocker.exe
Size

80KB
MD5

28a6474a9964657fb8c736cfd198b262
SHA1

3e36ee0a3686f2209ecf52248e9cae9f6c0ecb71
SHA256

337693c33da7eec0b97a6d335a7fd23a0eecf48c06cd1f2e98867a2c6b914c9b
SHA512

28740aa1aadd7da75b15c50faf0bab78ce75e6fce9099669cf00fedc5c01a8470d62f0e385bd7e27c07f925a11873ed758eb91b042c493d24cbc6ba3483af755
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdeSx:T6a+rdOOtEvwDpjNtV

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2332-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2332-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x00090000000142c4-14.dat	CryptoLocker_rule2
behavioral1/memory/2892-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2892-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2332-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2332-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x00090000000142c4-14.dat	CryptoLocker_set1
behavioral1/memory/2892-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2892-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2332-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2332-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x00090000000142c4-14.dat	UPX
behavioral1/memory/2892-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2892-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2892	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2332	2024-01-23_28a6474a9964657fb8c736cfd198b262_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2332-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2332-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x00090000000142c4-14.dat	upx
behavioral1/memory/2892-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2892-25-0x0000000000500000-0x0000000000510000-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 2332 wrote to memory of 2892	2332	2024-01-23_28a6474a9964657fb8c736cfd198b262_cryptolocker.exe	28
PID 2332 wrote to memory of 2892	2332	2024-01-23_28a6474a9964657fb8c736cfd198b262_cryptolocker.exe	28
PID 2332 wrote to memory of 2892	2332	2024-01-23_28a6474a9964657fb8c736cfd198b262_cryptolocker.exe	28
PID 2332 wrote to memory of 2892	2332	2024-01-23_28a6474a9964657fb8c736cfd198b262_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-23_28a6474a9964657fb8c736cfd198b262_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-23_28a6474a9964657fb8c736cfd198b262_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2332
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2892

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

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

Filesize
81KB

MD5
54086ffc4e2908869671a478578e0f3a

SHA1
277b42c36f21a7579814434aeedf27bbee10eac1

SHA256
85cde7e3e59096506c276455991539fee63337fcc5e59bc0414283ba5872c70e

SHA512
315419940802a2a48c32f81fd959e6288c305f75b9c20f708288cbd3e9fa218f568a438a485b97bf7f1488a83a8c4da04f3d430fa2e65721b6183b5e233bc302

Download Submit
memory/2332-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2332-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2332-2-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2332-8-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2332-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2892-18-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2892-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2892-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download