aed7a8e90e70ac66e37e8c86f4e1ec8a6ea24f544a5a5a9c7e41385cf075e761

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 16:39

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General

Target

2024-02-19_7bd6d92a521845156f8e66d8854eb10f_cryptolocker.exe
Size

91KB
MD5

7bd6d92a521845156f8e66d8854eb10f
SHA1

15a6e598f08ff546e46ff4318b53e42172c60723
SHA256

aed7a8e90e70ac66e37e8c86f4e1ec8a6ea24f544a5a5a9c7e41385cf075e761
SHA512

2bbf067418d900818e0c2c9bcd2e0264cac8554a40d3c0a700c59685d93b5fde835e8af4ed694df7b3bf91dd8d326fef68012d51df4f7538a3a1659dc209b151
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRMy87Uvq:zCsanOtEvwDpjX

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/388-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002323a-13.dat	CryptoLocker_rule2
behavioral2/memory/388-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4716-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4716-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/388-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002323a-13.dat	CryptoLocker_set1
behavioral2/memory/388-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4716-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4716-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/388-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002323a-13.dat	UPX
behavioral2/memory/388-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4716-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4716-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-02-19_7bd6d92a521845156f8e66d8854eb10f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4716	misid.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/388-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000700000002323a-13.dat	upx
behavioral2/memory/388-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4716-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4716-27-0x0000000000500000-0x0000000000510000-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 388 wrote to memory of 4716	388	2024-02-19_7bd6d92a521845156f8e66d8854eb10f_cryptolocker.exe	85
PID 388 wrote to memory of 4716	388	2024-02-19_7bd6d92a521845156f8e66d8854eb10f_cryptolocker.exe	85
PID 388 wrote to memory of 4716	388	2024-02-19_7bd6d92a521845156f8e66d8854eb10f_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-19_7bd6d92a521845156f8e66d8854eb10f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_7bd6d92a521845156f8e66d8854eb10f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:388
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:4716

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
91KB

MD5
57823aa0217c0c288f787c0c2fe0e9a8

SHA1
d9bd1716697e9e0bd03d8c595cb94f273e35073e

SHA256
e857665d73bf95e48baa2d4008f0827f51253ac14baa57809a1a5e5a2aa4f4cc

SHA512
d2f81d31b3ab5425af1450983ad34e4db1b5df734e06b9feda507776ebb009c8115a27d0c42dd01d5ea2937e1d77e868b41e4abf0a286a8fdd23bc1ad500318e

Download Submit
memory/388-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/388-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/388-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/388-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/388-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4716-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4716-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4716-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4716-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download