b85e28dcf094060295e9f01ecb1bc7fefa79106be612f236d8a8c1435d48b677

Analysis

max time kernel
89s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04-02-2024 01:44

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General

Target

2024-02-04_cf6dcae11e693e59b5001cd4a96cb431_cryptolocker.exe
Size

82KB
MD5

cf6dcae11e693e59b5001cd4a96cb431
SHA1

b171a79147a493b8f4f6995ac5ddf59539e8c4d1
SHA256

b85e28dcf094060295e9f01ecb1bc7fefa79106be612f236d8a8c1435d48b677
SHA512

f197f10914a4de883ac3dc1e5c0e3dbe2c90e77a90d6a1701c9de3af134edfcb016179c25e481cdef1e0c31f2af48c2f8faf3acfa6c8f7f8ebc3e2985b486fab
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1kyJS1nQ:zCsanOtEvwDpjW

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1720-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023177-13.dat	CryptoLocker_rule2
behavioral2/memory/1720-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/916-54-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1720-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023177-13.dat	CryptoLocker_set1
behavioral2/memory/1720-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/916-54-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1720-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c000000023177-13.dat	UPX
behavioral2/memory/1720-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/916-54-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	misid.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-02-04_cf6dcae11e693e59b5001cd4a96cb431_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
916	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1720-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c000000023177-13.dat	upx
behavioral2/memory/1720-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/916-54-0x0000000000500000-0x0000000000510000-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 1720 wrote to memory of 916	1720	2024-02-04_cf6dcae11e693e59b5001cd4a96cb431_cryptolocker.exe	84
PID 1720 wrote to memory of 916	1720	2024-02-04_cf6dcae11e693e59b5001cd4a96cb431_cryptolocker.exe	84
PID 1720 wrote to memory of 916	1720	2024-02-04_cf6dcae11e693e59b5001cd4a96cb431_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-04_cf6dcae11e693e59b5001cd4a96cb431_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_cf6dcae11e693e59b5001cd4a96cb431_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1720
- 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:916

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
82KB

MD5
49ec1bd8219f64b91d857e5ce8394b3f

SHA1
3c043757c5ae8fdc09ba22c3d290c690d620a1fc

SHA256
41603ad14ce38fd0d82cdccfad0a319398fc897f3ee6fa781050e061fe94a4aa

SHA512
e988fca4f152f2385a2df67661b90975fd27eac4bf7423ad0c954742198ac9eaa6277eea731eb3496e59ddd55da16b452444fe0d444d0efd82c0007cfcbbc370

Download Submit
memory/916-19-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/916-24-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/916-54-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1720-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1720-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1720-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1720-3-0x0000000000810000-0x0000000000816000-memory.dmp

Filesize
24KB

Download
memory/1720-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download