f311be9548a3fa465967621443b8e38aad9033e8b814981ff2db71f679cfe42f

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26-03-2024 17:32

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General

Target

2024-03-26_6dfa81f156e36e2ab05a4408f5c5e311_cryptolocker.exe
Size

100KB
MD5

6dfa81f156e36e2ab05a4408f5c5e311
SHA1

4f3f145cbb42669e5925e51467437dc66e869082
SHA256

f311be9548a3fa465967621443b8e38aad9033e8b814981ff2db71f679cfe42f
SHA512

ef5cd06f2c34947970c26f4ebd6dcd7040b83fc789c869edccb988304ce1b099f8a8bd3a425306377ced35805c9f8b2248e2e1cd082d2d51e29385b1be03a080
SSDEEP

768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJHlv/k2OYPr:xj+VGMOtEvwDpjubwQEIiVmkxv/CYPr

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4616-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002323d-13.dat	CryptoLocker_rule2
behavioral2/memory/4616-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3368-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4616-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002323d-13.dat	CryptoLocker_set1
behavioral2/memory/4616-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3368-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 4 IoCs

resource	yara_rule
behavioral2/memory/4616-0-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x000700000002323d-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4616-18-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/3368-26-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress

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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	2024-03-26_6dfa81f156e36e2ab05a4408f5c5e311_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3368	misid.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 4616 wrote to memory of 3368	4616	2024-03-26_6dfa81f156e36e2ab05a4408f5c5e311_cryptolocker.exe	91
PID 4616 wrote to memory of 3368	4616	2024-03-26_6dfa81f156e36e2ab05a4408f5c5e311_cryptolocker.exe	91
PID 4616 wrote to memory of 3368	4616	2024-03-26_6dfa81f156e36e2ab05a4408f5c5e311_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-03-26_6dfa81f156e36e2ab05a4408f5c5e311_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-26_6dfa81f156e36e2ab05a4408f5c5e311_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4616
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:3368

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\misid.exe

Filesize
101KB

MD5
e739b0a79a0d5309d858d5314d480771

SHA1
e04428830645b982b4292372866b324242ac8b8c

SHA256
c888b14590bc18dc9e1a9a9b183c023df7cd22f88ff51959c0410db182b22b10

SHA512
e7dfbf81688291e61e2561083780c5997fefe10bce1dd208ecaa2e593781bbee8f1aaae8d47e71458da808f00290d545bc6fff5e0b9fccf0f2f1d1fbdea29802

Download Submit
memory/3368-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3368-20-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/3368-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4616-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4616-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4616-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4616-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4616-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download