b9d9d0e3ca26cac3d23bab7cb7636e2ed2cb0964dbb8efc44d2f8cc93721898e

Analysis

max time kernel
145s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 20:02

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General

Target

2024-02-12_6e60fbf0626b3b505ab484c241dfabfd_cryptolocker.exe
Size

98KB
MD5

6e60fbf0626b3b505ab484c241dfabfd
SHA1

e946a0e19f353506b44cacbb2da61b2e6eebdd01
SHA256

b9d9d0e3ca26cac3d23bab7cb7636e2ed2cb0964dbb8efc44d2f8cc93721898e
SHA512

9cbfac4774c08d50c0f7f25d7f41c95a94f9ab87dc39119d73276fcef01c2fc156c2afb7d903b454a54345c81c6efcac38676050944bddf20f9acd793c86a5b5
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjuvQfb:zCsanOtEvwDpj8

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2648-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\misid.exe	CryptoLocker_rule2
behavioral2/memory/2648-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2620-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2620-55-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2648-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\misid.exe	CryptoLocker_set1
behavioral2/memory/2648-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2620-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2620-55-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2648-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\misid.exe	UPX
behavioral2/memory/2648-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2620-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2620-55-0x0000000000500000-0x0000000000510000-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

Processes:

2024-02-12_6e60fbf0626b3b505ab484c241dfabfd_cryptolocker.exemisid.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-12_6e60fbf0626b3b505ab484c241dfabfd_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

Processes:

misid.exe

pid process

2620 misid.exe

pid	process
2620	misid.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2648-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\misid.exe	upx
behavioral2/memory/2648-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2620-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2620-55-0x0000000000500000-0x0000000000510000-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

Processes:

2024-02-12_6e60fbf0626b3b505ab484c241dfabfd_cryptolocker.exe

description	pid	process	target process
PID 2648 wrote to memory of 2620	2648	2024-02-12_6e60fbf0626b3b505ab484c241dfabfd_cryptolocker.exe	misid.exe
PID 2648 wrote to memory of 2620	2648	2024-02-12_6e60fbf0626b3b505ab484c241dfabfd_cryptolocker.exe	misid.exe
PID 2648 wrote to memory of 2620	2648	2024-02-12_6e60fbf0626b3b505ab484c241dfabfd_cryptolocker.exe	misid.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_6e60fbf0626b3b505ab484c241dfabfd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_6e60fbf0626b3b505ab484c241dfabfd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2648

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:2620

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\misid.exe
Filesize
98KB

MD5
6dca5a4cdc34f866af15258f1411f770

SHA1
0156097a991d91eff428e34cd68d957487190374

SHA256
5207e4b7f06906a05ed3071e2b26e5674456722b59156d4978266cd3048818ca

SHA512
81345b3128c5055e2e2c45f636018a242cc2eb4615a0c324d92b4a0bab2a2a47fa4d1a598dfb407aa2df0e5dcbd0a208751845a64d3e7d0f7bd67e2fbdc6f6e7

Download Submit
memory/2620-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2620-20-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2620-23-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2620-55-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2648-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2648-3-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/2648-2-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/2648-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/2648-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download