7c6adde67a0a82817cb981edb95c7ecfe0b9ca1ac0c73f0a59d81c86327ac8ce

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/02/2024, 20:44

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General

Target

2024-02-18_8587ebc7ba7cf32927ef2ade8c7e11d7_cryptolocker.exe
Size

115KB
MD5

8587ebc7ba7cf32927ef2ade8c7e11d7
SHA1

d5b324c3219cc53128cf3d1950f29cbbc13fcb9c
SHA256

7c6adde67a0a82817cb981edb95c7ecfe0b9ca1ac0c73f0a59d81c86327ac8ce
SHA512

010108ebfbad16823c11513dbde90527dcefd0a30bc9729b4d24270d66473a35e8ac9a066c8aabd7ab5529d0cfcb47fdac4fbe9a3dc2ced2b0de9b004b0f65ef
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjCGYQbN/PKwNLX9h6:T6a+rdOOtEvwDpjLzk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1576-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023039-13.dat	CryptoLocker_rule2
behavioral2/memory/1576-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4376-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1576-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023039-13.dat	CryptoLocker_set1
behavioral2/memory/1576-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4376-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1576-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023039-13.dat	UPX
behavioral2/memory/1576-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4376-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-02-18_8587ebc7ba7cf32927ef2ade8c7e11d7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4376	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1576-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023039-13.dat	upx
behavioral2/memory/1576-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4376-26-0x0000000000500000-0x0000000000510000-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 3 IoCs

description	pid	Process	procid_target
PID 1576 wrote to memory of 4376	1576	2024-02-18_8587ebc7ba7cf32927ef2ade8c7e11d7_cryptolocker.exe	85
PID 1576 wrote to memory of 4376	1576	2024-02-18_8587ebc7ba7cf32927ef2ade8c7e11d7_cryptolocker.exe	85
PID 1576 wrote to memory of 4376	1576	2024-02-18_8587ebc7ba7cf32927ef2ade8c7e11d7_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-18_8587ebc7ba7cf32927ef2ade8c7e11d7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_8587ebc7ba7cf32927ef2ade8c7e11d7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1576
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4376

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

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
115KB

MD5
e26ef66f460695631170ad81e4812f4f

SHA1
24cef6acaaffdc1573d53dd3cd97a2a1f558d015

SHA256
4b9105a8c43e3b028df0e77cd42b5a1188a90a2fce53b611b53189e1bb7100c9

SHA512
11d463fe785fba488ed6065333deb2378eccb8a25e9c858b9d7b79d4a9de11699b8ae7ee34b4d4889885581e618a8d640d7060941fb2c6c69a0126c68b2dd864

Download Submit
memory/1576-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1576-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1576-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1576-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1576-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4376-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4376-25-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4376-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download