42b8e4b5204351eb9e4cfaf01434d97952385a572a41b4274d8194aee7fe2fba

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
22/02/2024, 05:25

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General

Target

2024-02-22_0a877aa7340771d8f36dfde3f2371340_cryptolocker.exe
Size

148KB
MD5

0a877aa7340771d8f36dfde3f2371340
SHA1

c793cc289ba563c3b663a1b4ef0acb0a062c454a
SHA256

42b8e4b5204351eb9e4cfaf01434d97952385a572a41b4274d8194aee7fe2fba
SHA512

4418df353aded43fed1a06da2d3d8e4ac2647846c6860ce714a2ff38804fcfa0b644dbe41700518f65879324436069293e3cfdaca9c82e27588dcf7653478065
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp699GNtL1e2l:z6a+CdOOtEvwDpjcz2

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2924-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a00000001418d-11.dat	CryptoLocker_rule2
behavioral1/memory/2924-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2476-20-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2924-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a00000001418d-11.dat	CryptoLocker_set1
behavioral1/memory/2924-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2476-20-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2924-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000a00000001418d-11.dat	UPX
behavioral1/memory/2924-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2476-20-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2476	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2924	2024-02-22_0a877aa7340771d8f36dfde3f2371340_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2924-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000a00000001418d-11.dat	upx
behavioral1/memory/2924-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2476-20-0x0000000000500000-0x0000000000510000-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 2924 wrote to memory of 2476	2924	2024-02-22_0a877aa7340771d8f36dfde3f2371340_cryptolocker.exe	28
PID 2924 wrote to memory of 2476	2924	2024-02-22_0a877aa7340771d8f36dfde3f2371340_cryptolocker.exe	28
PID 2924 wrote to memory of 2476	2924	2024-02-22_0a877aa7340771d8f36dfde3f2371340_cryptolocker.exe	28
PID 2924 wrote to memory of 2476	2924	2024-02-22_0a877aa7340771d8f36dfde3f2371340_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-22_0a877aa7340771d8f36dfde3f2371340_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_0a877aa7340771d8f36dfde3f2371340_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2924
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2476

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
148KB

MD5
7398ac18a54a705594da2e81d118c116

SHA1
e27d396479f56ce3a738ebd94aefbc40315449d1

SHA256
4e65cddf4b117554bd7af92bb7179603389a5bab8f5d8768ea458c0c3a0a0c17

SHA512
f7b7e02c8816f05f747d9d28254909cd1b0f216ae925c0765f8edc9186886743aa67d11a0bb0da79de894531d912802fd6c209fbecfba2ba80502c4001ef14a3

Download Submit
memory/2476-17-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2476-18-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2476-20-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2924-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2924-1-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2924-3-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2924-2-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2924-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download