6822a63856e3199e9635640d448844db2da11daec50f239d461e9832050a1bd0

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
21-05-2024 15:45

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General

Target

2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe
Size

24KB
MD5

871b5515c64891358b210eb49a0c2d7f
SHA1

c59d23940a15b90bf00167c2d5dfea2f18a540d7
SHA256

6822a63856e3199e9635640d448844db2da11daec50f239d461e9832050a1bd0
SHA512

109a315fd6d14e0aeb3a91f8950ac4622a167ec6a7e9ce72332f601dff2ea365df4cc891ed9e32ed2377f4b7cb01ffbfbfc7ef76427024b0f069dbb06496f2df
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJ23/:bVCPwFRo6CpwXFXSqQXfjAsJ+/

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2388-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral1/memory/2620-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2388-16-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2620-27-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2388-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\hasfj.exe	UPX
behavioral1/memory/2620-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2388-16-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2620-27-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

2620 hasfj.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe

pid process

2388 2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe

pid	process
2620	hasfj.exe

pid	process
2388	2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2388-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\hasfj.exe	upx
behavioral1/memory/2620-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2388-16-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2620-27-0x0000000008000000-0x000000000800E000-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

Processes:

2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe

description	pid	process	target process
PID 2388 wrote to memory of 2620	2388	2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe	hasfj.exe
PID 2388 wrote to memory of 2620	2388	2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe	hasfj.exe
PID 2388 wrote to memory of 2620	2388	2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe	hasfj.exe
PID 2388 wrote to memory of 2620	2388	2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2388

C:\Users\Admin\AppData\Local\Temp\hasfj.exe
"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
2⤵
- Executes dropped EXE
PID:2620

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\hasfj.exe
Filesize
24KB

MD5
b1a08e7d87f216e88abaa28ed60a4468

SHA1
0aee0d0a61a6898bf631c09e70ddb06a0f80a229

SHA256
7efc399ac0c09cd6e65b63c355dec25c174c0fa21e82c56b4c2a5a0337e2b2ce

SHA512
821e30f45185583071cc6933e300d49445b56955c58528ab7fa3f5bfdeba050f4d6cb142557d4c2c49a92b89923a7f87844849b9af42c7aa2056e05346eb3b80

Download Submit
memory/2388-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2388-1-0x0000000001CA0000-0x0000000001CA6000-memory.dmp

Filesize
24KB

Download
memory/2388-2-0x0000000001CB0000-0x0000000001CB6000-memory.dmp

Filesize
24KB

Download
memory/2388-9-0x0000000001CA0000-0x0000000001CA6000-memory.dmp

Filesize
24KB

Download
memory/2388-16-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2620-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2620-19-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2620-26-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2620-27-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download