334964436a38e58b30413f2101b4b5ff6d9404129ac09e27190b4446ecbf5506

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/02/2024, 11:43

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General

Target

2024-02-28_b3c1177baf2ce9dde9837de049b79022_cryptolocker.exe
Size

62KB
MD5

b3c1177baf2ce9dde9837de049b79022
SHA1

fe24aa581bdaef0e15ba5353aba8ed1f8579fd82
SHA256

334964436a38e58b30413f2101b4b5ff6d9404129ac09e27190b4446ecbf5506
SHA512

194ca1769acf208f56eef73d7d6a401c7c4a055fa99a58531f00b6ff0ef25458906e95f73a58adc49fb7b7ba3c7ec32fba0102062fdfe60d120a80bd6f97f52c
SSDEEP

768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZgBh8i6g7GoFwDJEi:xj+VGMOtEvwDpjubEgyw+i

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4672-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000e000000023147-13.dat	CryptoLocker_rule2
behavioral2/memory/4052-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4672-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4052-53-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4672-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000e000000023147-13.dat	CryptoLocker_set1
behavioral2/memory/4052-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4672-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4052-53-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 5 IoCs

resource	yara_rule
behavioral2/memory/4672-0-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x000e000000023147-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4052-18-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4672-17-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4052-53-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress

Checks computer location settings 2 TTPs 2 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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	2024-02-28_b3c1177baf2ce9dde9837de049b79022_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

pid	Process
4052	misid.exe

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 4672 wrote to memory of 4052	4672	2024-02-28_b3c1177baf2ce9dde9837de049b79022_cryptolocker.exe	88
PID 4672 wrote to memory of 4052	4672	2024-02-28_b3c1177baf2ce9dde9837de049b79022_cryptolocker.exe	88
PID 4672 wrote to memory of 4052	4672	2024-02-28_b3c1177baf2ce9dde9837de049b79022_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-02-28_b3c1177baf2ce9dde9837de049b79022_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_b3c1177baf2ce9dde9837de049b79022_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4672
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:4052

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\misid.exe

Filesize
62KB

MD5
946970807609b5e70d687d4cbd295a8a

SHA1
802d1cd86a571d0190522ca033f4ae79f4d68c31

SHA256
6acb9d4f352b5ba5ecd11fac4c915cfc9984a2f372a6c488d0b63ae5b818fdfa

SHA512
f20f0291e13b8800ad8dd716d6858d654e4c09196ce03cd4fd3d6e83874f2e6e3fc61685de156a8b3211e0471da4e5a4edd13504984167bab984fa6afdcee42d

Download Submit
memory/4052-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4052-20-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4052-23-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/4052-53-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4672-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4672-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4672-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4672-3-0x00000000021A0000-0x00000000021A6000-memory.dmp

Filesize
24KB

Download
memory/4672-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download