8f4d7e7d41ebb684db02fc3feb0403566a810136d97bb17bb87ca037464b1126

Analysis

max time kernel
149s
max time network
152s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
20/03/2024, 02:54

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General

Target

2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe
Size

71KB
MD5

97df09a134118f1371d9dc274f84bdfc
SHA1

7dfdca384e32b0d5d0e77cb75648c2416da1578e
SHA256

8f4d7e7d41ebb684db02fc3feb0403566a810136d97bb17bb87ca037464b1126
SHA512

aeefbf93c3d61fe89eb41229494debd514caa46587031fc0398b4d9ebead915ef9be1751ba3348dc18a85ab3b042b76915d225b878af5e3a41ac3283e25c0461
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaFAeBt:z6a+CdOOtEvwDpjQP

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2484-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000800000001222d-11.dat	CryptoLocker_rule2
behavioral1/memory/2484-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2540-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2540-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2484-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000800000001222d-11.dat	CryptoLocker_set1
behavioral1/memory/2484-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2540-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2540-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2484-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000800000001222d-11.dat	UPX
behavioral1/memory/2484-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2540-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2540-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2540	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2484	2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2484-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000800000001222d-11.dat	upx
behavioral1/memory/2484-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2540-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2540-27-0x0000000000500000-0x0000000000510000-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 2484 wrote to memory of 2540	2484	2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe	28
PID 2484 wrote to memory of 2540	2484	2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe	28
PID 2484 wrote to memory of 2540	2484	2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe	28
PID 2484 wrote to memory of 2540	2484	2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2484
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2540

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
71KB

MD5
b19374e363b2a0352eccaae740d4a88d

SHA1
b84b4a9a02ecf57df374dbd5687cdfba17cc0c61

SHA256
1ed4e2d055dcb5c7d881804af21bd819db1bd5dd6b8400e002bcd163305e2767

SHA512
aaf7b6dd274e710afdb071d7715b7963502b4d4e51e50434697fe3763dad50d1775f1acf12a2bea18edaa48983649dadef55e3510782ea2cf70c2a336d3c4a07

Download Submit
memory/2484-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2484-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2484-2-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2484-4-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2484-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2484-14-0x0000000002800000-0x0000000002810000-memory.dmp

Filesize
64KB

Download
memory/2540-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2540-26-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2540-19-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2540-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download