0b8d29bb74021bd9b0d0108c67d0526da45545cf54079375cd60ba66d3701f46

Analysis

max time kernel
147s
max time network
148s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 03:36

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General

Target

2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe
Size

88KB
MD5

fb10beca7aa226900443a4f8bf5dc2c5
SHA1

81a1908ddec058b08ae623f91b4e490a0d0f8aab
SHA256

0b8d29bb74021bd9b0d0108c67d0526da45545cf54079375cd60ba66d3701f46
SHA512

c3581d8fbb0b0a24f568a77be8c0e18d9619ababf51cb098887b6d20cf0fc15e6d6e7e25ff7d543b524dd12c6803389254974408220d8bfdca6611358ef49c1c
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIODZ:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgH

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3012-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/3012-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2704-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3012-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/3012-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2704-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3012-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/3012-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2704-25-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2704 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe

pid process

3012 2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe

pid	process
2704	asih.exe

pid	process
3012	2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/3012-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/3012-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2704-25-0x0000000000500000-0x000000000050F000-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

Processes:

2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe

description	pid	process	target process
PID 3012 wrote to memory of 2704	3012	2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe	asih.exe
PID 3012 wrote to memory of 2704	3012	2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe	asih.exe
PID 3012 wrote to memory of 2704	3012	2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe	asih.exe
PID 3012 wrote to memory of 2704	3012	2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3012
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2704

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
88KB

MD5
0daeb7fd01fde5684d1636130c33a314

SHA1
683a9591ccf88b07814a296535e8b9dc94758817

SHA256
463767540f851bd48b6d2f0d1656771891fa40c0f9fc89c29643234ce6553b0f

SHA512
9f12911f0c4322d5500c8970b2344c297aa0bd66d04cf580ec4a7a949741c4698f74510ec7f6eb7f0685376ee0df45851b405b9b96479d071302569ab45c50ba

Download Submit
memory/2704-18-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2704-25-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3012-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3012-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3012-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3012-2-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/3012-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download