fbb3c2808cd24c8c694775b556fb89abce93cc2f21fba37a43bc06417b70d1e5

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
19/01/2024, 09:59

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General

Target

2024-01-19_192ebbc4d44e5b4857359cd32e303511_cryptolocker.exe
Size

115KB
MD5

192ebbc4d44e5b4857359cd32e303511
SHA1

70a674d1106c83fef7d71c39cf20b5bc56dca428
SHA256

fbb3c2808cd24c8c694775b556fb89abce93cc2f21fba37a43bc06417b70d1e5
SHA512

6cc27fa6834452b16fc55d2ca201e37fc8169bdefe9178c4abc461e48f49bc6b0d8ed9fb0b0d8690772d7832b7b26f43d585f98272928d5e269e079e09663330
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjCGYQbN/PKwNgerar/P:T6a+rdOOtEvwDpjLzq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2148-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a00000001224e-11.dat	CryptoLocker_rule2
behavioral1/memory/2148-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2216-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2216-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2148-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a00000001224e-11.dat	CryptoLocker_set1
behavioral1/memory/2148-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2216-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2216-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2148-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000a00000001224e-11.dat	UPX
behavioral1/memory/2148-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2216-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2216-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2216	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2148	2024-01-19_192ebbc4d44e5b4857359cd32e303511_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2148-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000a00000001224e-11.dat	upx
behavioral1/memory/2148-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2216-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2216-27-0x0000000000500000-0x0000000000510000-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 4 IoCs

description	pid	Process	procid_target
PID 2148 wrote to memory of 2216	2148	2024-01-19_192ebbc4d44e5b4857359cd32e303511_cryptolocker.exe	28
PID 2148 wrote to memory of 2216	2148	2024-01-19_192ebbc4d44e5b4857359cd32e303511_cryptolocker.exe	28
PID 2148 wrote to memory of 2216	2148	2024-01-19_192ebbc4d44e5b4857359cd32e303511_cryptolocker.exe	28
PID 2148 wrote to memory of 2216	2148	2024-01-19_192ebbc4d44e5b4857359cd32e303511_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-19_192ebbc4d44e5b4857359cd32e303511_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-19_192ebbc4d44e5b4857359cd32e303511_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2148
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2216

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

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
115KB

MD5
89663877abe5b4246b498d7f2feeccce

SHA1
e856c99db49e9883ee9139aa6f73c7e7e81ff615

SHA256
263d59a3b56472b9063d3d6579566f6585727349f002d52f107a01df150b6399

SHA512
9af047db0fb5322decb718752b56f3e1229d4ce8ec70be0fba62a3a85efe7430198bea5fe6774cc82e4a0d4144e0e99df8d439689fd62b21c3b15151fd9fed44

Download Submit
memory/2148-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2148-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2148-2-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2148-3-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2148-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2148-16-0x0000000001F50000-0x0000000001F60000-memory.dmp

Filesize
64KB

Download
memory/2216-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2216-19-0x0000000000210000-0x0000000000216000-memory.dmp

Filesize
24KB

Download
memory/2216-21-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2216-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download