40b931d17836cd6e4cec91fd3689b5ae660c402748fd6ed42cf9130a2364edf4

Analysis

max time kernel
142s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
20/02/2024, 06:31

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General

Target

2024-02-20_375e45b54b1db2ce4c936fd4632f68ff_cryptolocker.exe
Size

60KB
MD5

375e45b54b1db2ce4c936fd4632f68ff
SHA1

e3a98d996e80489426d1e25022ffdceb855ef7a5
SHA256

40b931d17836cd6e4cec91fd3689b5ae660c402748fd6ed42cf9130a2364edf4
SHA512

e2426e0aac5ad8a83cf9b4bc6b095fcab59689a1b79db17490ae2e5ddd86ecd1c0c51b14e0afbbf7ba7924eabc5e014beaf5a076e23ee5b6bafa8b50355e5e9e
SSDEEP

768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mnVR:zj+soPSMOtEvwDpj4kpmeLmn7

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3400-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023220-13.dat	CryptoLocker_rule2
behavioral2/memory/3400-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1072-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3400-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023220-13.dat	CryptoLocker_set1
behavioral2/memory/3400-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1072-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3400-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023220-13.dat	UPX
behavioral2/memory/3400-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1072-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	2024-02-20_375e45b54b1db2ce4c936fd4632f68ff_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1072	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3400-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023220-13.dat	upx
behavioral2/memory/3400-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1072-26-0x0000000000500000-0x0000000000510000-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 3400 wrote to memory of 1072	3400	2024-02-20_375e45b54b1db2ce4c936fd4632f68ff_cryptolocker.exe	84
PID 3400 wrote to memory of 1072	3400	2024-02-20_375e45b54b1db2ce4c936fd4632f68ff_cryptolocker.exe	84
PID 3400 wrote to memory of 1072	3400	2024-02-20_375e45b54b1db2ce4c936fd4632f68ff_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-20_375e45b54b1db2ce4c936fd4632f68ff_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-20_375e45b54b1db2ce4c936fd4632f68ff_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3400
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:1072

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
61KB

MD5
4aea3b9910c4b34ad11eadfea7ae0410

SHA1
971291467d57662a7e046edda2af9c3e2274a0a4

SHA256
7ba3667bc2bc66cda874d77e198cfcc3d2337223a793d72217ebf52602006655

SHA512
aa73410e353e8ee38a3b73a2b37b450af1bc4acbde47857c0de8160c7706cfcca537d587da9d3490221adf180fa07218594ec38492a72bbc81481ed4ae196762

Download Submit
memory/1072-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/1072-20-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1072-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3400-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3400-1-0x0000000000680000-0x0000000000686000-memory.dmp

Filesize
24KB

Download
memory/3400-2-0x0000000000680000-0x0000000000686000-memory.dmp

Filesize
24KB

Download
memory/3400-3-0x0000000002240000-0x0000000002246000-memory.dmp

Filesize
24KB

Download
memory/3400-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download