35bb92a252f5572800db00e8182e5b2c7e241fb3b8e6233f4d3084ea42ecb117

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
19/02/2024, 05:21

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General

Target

2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe
Size

114KB
MD5

ed31749da19614babd662e6e91eb713f
SHA1

b126c3d45c8dd3dca47189246bef6cdae1d82b35
SHA256

35bb92a252f5572800db00e8182e5b2c7e241fb3b8e6233f4d3084ea42ecb117
SHA512

1d6c263bc171f543f0810505e8215b3c4a027bc75a65acedd42818dd7d1dc7e91f2c17f16aec2580a40e8003b3bda0f870740444369f989d1e642c951c8b4297
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01M:z6a+CdOOtEvwDpjcza

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/files/0x000c00000001234f-26.dat	CryptoLocker_rule2
behavioral1/memory/1300-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2112-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2112-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1300-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/files/0x000c00000001234f-26.dat	CryptoLocker_set1
behavioral1/memory/1300-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2112-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2112-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1300-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/files/0x000c00000001234f-26.dat	UPX
behavioral1/memory/1300-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2112-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2112-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1300-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1300	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2112	2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000c00000001234f-26.dat	upx
behavioral1/memory/1300-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2112-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2112-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1300-28-0x0000000000500000-0x0000000000510000-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 4 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 1300	2112	2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe	1
PID 2112 wrote to memory of 1300	2112	2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe	1
PID 2112 wrote to memory of 1300	2112	2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe	1
PID 2112 wrote to memory of 1300	2112	2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe	1

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
1⤵
- Executes dropped EXE
PID:1300

C:\Users\Admin\AppData\Local\Temp\2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2112

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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\asih.exe

Filesize
115KB

MD5
a55d6bb0cab213982d7ea8e67a022944

SHA1
2162e6a6bf09e603a450e4fdd9d09681a9b6ecb2

SHA256
8054681f596e7ed18a3044a3fcdb33bb052fe75b60eeec46bdb4b78e9d21a422

SHA512
6cb40febe205a472c753fbc873c5e2693090b705805bf430a11639c4960a91526a45250a730ef713588f936775cbbb2c20eb6a83d1c19dee8b3ef4e8ddefc5e4

Download Submit
memory/1300-20-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/1300-19-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/1300-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1300-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2112-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2112-14-0x0000000002480000-0x0000000002490000-memory.dmp

Filesize
64KB

Download
memory/2112-3-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2112-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2112-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2112-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2112-27-0x0000000002480000-0x0000000002490000-memory.dmp

Filesize
64KB

Download