8e1ebf3deff70f34f117935f642efac09f745b4fb87b69bca6f6ef5245e11503

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
26-04-2024 03:52

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General

Target

2024-04-26_87e953e96fd0b9a33eafa95c02795cae_cryptolocker.exe
Size

96KB
MD5

87e953e96fd0b9a33eafa95c02795cae
SHA1

b12a277bf1b434db7dbd3a65b5d4a4d9eda49c94
SHA256

8e1ebf3deff70f34f117935f642efac09f745b4fb87b69bca6f6ef5245e11503
SHA512

9fd07e52c2052c5caf663186531758c38f491006b4c811a339364d541f4093f4296599edddf2e0d64e66e355851b300c0eb6098f32fdd7810760c4a39bc376d2
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/b6:zCsanOtEvwDpjBG

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2628-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e97c-13.dat	CryptoLocker_rule2
behavioral2/memory/2628-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2332-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2332-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/2628-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e97c-13.dat	CryptoLocker_set1
behavioral2/memory/2628-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2332-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2332-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2628-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e97c-13.dat	UPX
behavioral2/memory/2628-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2332-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2332-27-0x0000000000500000-0x0000000000510000-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-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation	2024-04-26_87e953e96fd0b9a33eafa95c02795cae_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2332	misid.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2628-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000001e97c-13.dat	upx
behavioral2/memory/2628-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2332-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2332-27-0x0000000000500000-0x0000000000510000-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 2628 wrote to memory of 2332	2628	2024-04-26_87e953e96fd0b9a33eafa95c02795cae_cryptolocker.exe	86
PID 2628 wrote to memory of 2332	2628	2024-04-26_87e953e96fd0b9a33eafa95c02795cae_cryptolocker.exe	86
PID 2628 wrote to memory of 2332	2628	2024-04-26_87e953e96fd0b9a33eafa95c02795cae_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-26_87e953e96fd0b9a33eafa95c02795cae_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-26_87e953e96fd0b9a33eafa95c02795cae_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2628
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:2332

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
96KB

MD5
e3ac05b0184bd7fa3edd20a21892b5b1

SHA1
1e0005b8dc315b2043408d8ad4dc1120452253c1

SHA256
2ed4860804aa679a84e1fff9445c78da726e24b0e17141e7e3b5f3b956e6a5e2

SHA512
95f46fa75911e407d69b573d54a266445d6a874e60343f1e8d10af693c92e719bc3b84978fe8dd6aef25e71b6512b2b618ed0dda0dee9cdb4d08513cff90e4c9

Download Submit
memory/2332-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2332-20-0x0000000001F80000-0x0000000001F86000-memory.dmp

Filesize
24KB

Download
memory/2332-21-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/2332-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2628-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2628-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2628-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2628-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2628-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download