b378d9cb56f4828ae28ac53603a8541346510e1484dc2f36abef2641f7487678

Analysis

max time kernel
149s
max time network
156s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
18/04/2024, 12:36

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General

Target

2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe
Size

51KB
MD5

59a5eb6ef8a2ce3f4da88feab58e563d
SHA1

c09a037d7e785a6e1d7d26d8ec1792bbf48f80ed
SHA256

b378d9cb56f4828ae28ac53603a8541346510e1484dc2f36abef2641f7487678
SHA512

df8afcec514cb6d134593f2ecb7fa766ba7021eaf258ee1cee7d8f648ba631ff99b7504d2e4395b1eb0e5046b1cbdd14a3bd1299985aef80919119367d705cdd
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOL:z6QFElP6n+gKmddpMOtEvwDpj31iL

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2224-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c0000000122f2-11.dat	CryptoLocker_rule2
behavioral1/memory/2224-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1140-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1140-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2224-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c0000000122f2-11.dat	CryptoLocker_set1
behavioral1/memory/2224-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1140-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1140-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2224-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c0000000122f2-11.dat	UPX
behavioral1/memory/2224-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1140-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1140-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1140	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2224	2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2224-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000c0000000122f2-11.dat	upx
behavioral1/memory/2224-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1140-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1140-26-0x0000000000500000-0x0000000000510000-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 2224 wrote to memory of 1140	2224	2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe	28
PID 2224 wrote to memory of 1140	2224	2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe	28
PID 2224 wrote to memory of 1140	2224	2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe	28
PID 2224 wrote to memory of 1140	2224	2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2224
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1140

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
51KB

MD5
3c8884b0826efa8171d4019908df8390

SHA1
d83463e04cc71bd6ac5439e5427f63ed9c5f6f3c

SHA256
502fc5d69ee7874692a83b71e4cb4992dc21262e36cba2dfeef68dd2d7c8a9ac

SHA512
53ae411c9493dbf0d7daf966252f50df8565c86474cd40d0d754e19dfcdc8bf2062e8080bf933959bdc3a7f6210727237c6800cc064c1b8d58178a70e2202796

Download Submit
memory/1140-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1140-18-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1140-20-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1140-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2224-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2224-0-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2224-2-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download
memory/2224-4-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2224-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download