198fd94f301379d75088e9edd13f5e677186bf9f689d5bb8bc35105c761c1998

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
16/04/2024, 01:27

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General

Target

2024-04-16_483881f3b637c8cf86140326ce584319_cryptolocker.exe
Size

38KB
MD5

483881f3b637c8cf86140326ce584319
SHA1

dce386a450700ef0d4d220de3cba1e34b37d0d40
SHA256

198fd94f301379d75088e9edd13f5e677186bf9f689d5bb8bc35105c761c1998
SHA512

d770f15a8289a65c1af9bfb4b6b16e16b3ce406bb035841db9c1e018c9bd24e4666c7deb2786528278802e3409c1068ea4a40919db577ed88507c24d467a5991
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaG:qDdFJy3QMOtEvwDpjjWMl7TdG

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1636-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012253-11.dat	CryptoLocker_rule2
behavioral1/memory/1636-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1332-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1332-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1636-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000012253-11.dat	CryptoLocker_set1
behavioral1/memory/1636-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1332-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1332-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1636-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c000000012253-11.dat	UPX
behavioral1/memory/1636-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1332-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1332-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1332	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1636	2024-04-16_483881f3b637c8cf86140326ce584319_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1636-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000c000000012253-11.dat	upx
behavioral1/memory/1636-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1332-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1332-25-0x0000000000500000-0x0000000000510000-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 1636 wrote to memory of 1332	1636	2024-04-16_483881f3b637c8cf86140326ce584319_cryptolocker.exe	28
PID 1636 wrote to memory of 1332	1636	2024-04-16_483881f3b637c8cf86140326ce584319_cryptolocker.exe	28
PID 1636 wrote to memory of 1332	1636	2024-04-16_483881f3b637c8cf86140326ce584319_cryptolocker.exe	28
PID 1636 wrote to memory of 1332	1636	2024-04-16_483881f3b637c8cf86140326ce584319_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-16_483881f3b637c8cf86140326ce584319_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-16_483881f3b637c8cf86140326ce584319_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1636
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1332

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

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Downloads

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

Filesize
38KB

MD5
92c44f6b6c6eeaf0171dc3d716422858

SHA1
d8070ec370dacbdbb70d83261a2f8bf4bf92de61

SHA256
d85b42e09c1e2471a24a08cbd5ee1de9db8332e34243166a07258f27ad6fbcdf

SHA512
53203d035c534dcb5c4e4a904207b5f586f3434b7d9f2af6631e4ac8e74fa598706353a3676c6b02da4d991772c6bc0a6f6bb84342926da0c449ec4962488e9b

Download Submit
memory/1332-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1332-18-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/1332-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1636-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1636-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1636-2-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1636-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1636-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download