df52b85187aac34c21e964818ca10d4c27d071e4339922ca325363764229a4d8

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
29/01/2024, 11:26

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General

Target

2024-01-29_1d4ebb9e1587421a497d7297b840cd35_cryptolocker.exe
Size

77KB
MD5

1d4ebb9e1587421a497d7297b840cd35
SHA1

556cf245f834403206f5b7b6db0b4a33df98b2be
SHA256

df52b85187aac34c21e964818ca10d4c27d071e4339922ca325363764229a4d8
SHA512

8f9666dc19d8899d45bce5d8341e34fa93a013c3df42a092876dd7cac45c3fd59a7a049fda845fbbc273dc623dab31362906216ce64fd39c96063a87a991d966
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOA+YSP75:T6a+rdOOtEvwDpjNb

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1920-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a0000000139b6-11.dat	CryptoLocker_rule2
behavioral1/memory/1920-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3028-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3028-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1920-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a0000000139b6-11.dat	CryptoLocker_set1
behavioral1/memory/1920-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3028-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3028-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1920-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000a0000000139b6-11.dat	UPX
behavioral1/memory/1920-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3028-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3028-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3028	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1920	2024-01-29_1d4ebb9e1587421a497d7297b840cd35_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1920-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000a0000000139b6-11.dat	upx
behavioral1/memory/1920-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3028-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3028-26-0x0000000000500000-0x0000000000510000-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 1920 wrote to memory of 3028	1920	2024-01-29_1d4ebb9e1587421a497d7297b840cd35_cryptolocker.exe	28
PID 1920 wrote to memory of 3028	1920	2024-01-29_1d4ebb9e1587421a497d7297b840cd35_cryptolocker.exe	28
PID 1920 wrote to memory of 3028	1920	2024-01-29_1d4ebb9e1587421a497d7297b840cd35_cryptolocker.exe	28
PID 1920 wrote to memory of 3028	1920	2024-01-29_1d4ebb9e1587421a497d7297b840cd35_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-29_1d4ebb9e1587421a497d7297b840cd35_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-29_1d4ebb9e1587421a497d7297b840cd35_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1920
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3028

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
77KB

MD5
2ba6e1106f8ceff8dca4bf8afdeea973

SHA1
0987073ddea8303b9fdf1538f4603579d489577f

SHA256
d73a347b0e45a715f920ce091bb787b7480d62636fede19c964f9e492b69f1a4

SHA512
2208794a0f67b3ec89265aa09f1b45cabe3fc0425bdfec2efc3485396d83f3a89a16e9ebee7fc3d94342b7e1444a0232371a5920cf55a010156d9a42f149feaf

Download Submit
memory/1920-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1920-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1920-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1920-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1920-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3028-18-0x0000000000410000-0x0000000000416000-memory.dmp

Filesize
24KB

Download
memory/3028-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3028-20-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/3028-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download