39899b67bb39f64295e6a5f419fc96f437aa01a90eb69487926df300e0b8134a

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
27-01-2024 03:40

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General

Target

2024-01-27_a2d34eef8f45e7dca83c6719b11c1cf8_cryptolocker.exe
Size

36KB
MD5

a2d34eef8f45e7dca83c6719b11c1cf8
SHA1

eae7bde1acc00c413b67d077272f071bbb97ce82
SHA256

39899b67bb39f64295e6a5f419fc96f437aa01a90eb69487926df300e0b8134a
SHA512

fac95745423a2b8e4d930d4d0942f039f40654ffeaa251792a932e156378bf5fbff6ec4720472259c561469eab4e7b063f44da93ef62c4ac37fb4ed97e580be9
SSDEEP

768:bxNQIE0eBhkL2Fo1CCwgfjOg1tsJ6zeen7JEgx3g:bxNrC7kYo1Fxf3s06gS

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023225-12.dat	CryptoLocker_rule2

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-01-27_a2d34eef8f45e7dca83c6719b11c1cf8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1596	pissa.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3724 wrote to memory of 1596	3724	2024-01-27_a2d34eef8f45e7dca83c6719b11c1cf8_cryptolocker.exe	86
PID 3724 wrote to memory of 1596	3724	2024-01-27_a2d34eef8f45e7dca83c6719b11c1cf8_cryptolocker.exe	86
PID 3724 wrote to memory of 1596	3724	2024-01-27_a2d34eef8f45e7dca83c6719b11c1cf8_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-01-27_a2d34eef8f45e7dca83c6719b11c1cf8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-27_a2d34eef8f45e7dca83c6719b11c1cf8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3724
- C:\Users\Admin\AppData\Local\Temp\pissa.exe
  "C:\Users\Admin\AppData\Local\Temp\pissa.exe"
  2⤵
  - Executes dropped EXE
  PID:1596

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\pissa.exe

Filesize
36KB

MD5
281e494060a8c15d153e670d174b0f54

SHA1
1a0e1a4d3dc167fe165363fb02fcc86fe0f57c52

SHA256
95539167d0c562b75e8fead83f7e2cb40b896c4cf1bcd87c137d12710717113b

SHA512
f4e3be6d468b6d6d60c286e00f55981275bfa88f3c00067d9da57145307ecbdcb397e2c78d2129b2fbfecc74ae42e852829bc56661aad7bc53debc6be4ae70da

Download Submit
memory/1596-18-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/1596-17-0x0000000002ED0000-0x0000000002ED6000-memory.dmp

Filesize
24KB

Download
memory/3724-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3724-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3724-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download