a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc

General

Target

a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc.exe
Size

140KB
MD5

5c37c82ce6248d5eaea227cf174a7220
SHA1

125f1fb1df8fd19150ebb38082c44417f40d256c
SHA256

a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc
SHA512

b06e59993b32cac4703f13bafb22ef56db54e5cb759e2785ea2c6dee55a29be5a898ce97fb73e83a71368f6378f3dd528472bfb1c61ce13d53d1416380066c15
SSDEEP

3072:/b4s/l8iiDXiYukRy9Vd746gh4Z91gCBzTz4y3/UHj7Nzspl+fXo:/B/l0Xi3uyJ7Mhy9dx3s3f4

Score

8^/10

persistence vmprotect

Malware Config

Signatures

Sets DLL path for service in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\ServTestDos\Parameters\ServiceDll = "C:\\Windows\\ServTestDos.dll"	a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc.exe

VMProtect packed file 6 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

Processes:

resource	yara_rule
behavioral2/memory/4876-132-0x00000000004E0000-0x0000000000527000-memory.dmp	vmprotect
behavioral2/memory/4876-133-0x00000000004E0000-0x0000000000527000-memory.dmp	vmprotect
\??\c:\windows\servtestdos.dll	vmprotect
C:\Windows\ServTestDos.dll	vmprotect
behavioral2/memory/1560-136-0x00000000758D0000-0x0000000075917000-memory.dmp	vmprotect
behavioral2/memory/1560-137-0x00000000758D0000-0x0000000075917000-memory.dmp	vmprotect

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

Processes:

a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc.exe

Loads dropped DLL 1 IoCs

Processes:

svchost.exe

pid process

1560 svchost.exe

pid	process
1560	svchost.exe

Drops file in Windows directory 2 IoCs

Processes:

a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc.exe

description	ioc	process
File created	C:\Windows\ServTestDos.dll	a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc.exe
File opened for modification	C:\Windows\ServTestDos.dll	a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

svchost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	svchost.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc.exe

description	pid	process	target process
PID 4876 wrote to memory of 5036	4876	a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc.exe	cmd.exe
PID 4876 wrote to memory of 5036	4876	a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc.exe	cmd.exe
PID 4876 wrote to memory of 5036	4876	a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc.exe
"C:\Users\Admin\AppData\Local\Temp\a2b74bbf07c32c440a3cb903d871823a618521b9364d73dea7f2a8f5b4cf0bfc.exe"
1⤵
- Sets DLL path for service in the registry
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4876

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\240575640.bat" "
2⤵
PID:5036

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k ServTestDos -s ServTestDos
1⤵
- Loads dropped DLL
- Checks processor information in registry
PID:1560

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\240575640.bat
Filesize
239B

MD5
30bc94a1820f2f02cd5052b9ad7801b0

SHA1
62715184c85c909c5c46927912b51175bcf9ab3d

SHA256
b220b2a8895ca5a8ec3ffb452174f4facdf4ddf80e0ddb12ef944c959c53de2b

SHA512
43b49799ba252882cfd6e05a42fffd677d19ee762697a35689b5a0f2383293edb1d33acd9d4db1fccbe122a43877dc3e1167b2628bbdad24ccb6b2e13ff3b36f

Download Submit
C:\Windows\ServTestDos.dll
Filesize
140KB

MD5
66920e430745ff0b65134e98d3cc851d

SHA1
4e0040a563975aa3022b9b154230544e9c2e6a8d

SHA256
270c7a6e56a60c2aa4d50ecf7049a55d37d7b4feb6836b068a346e08a7986c03

SHA512
adbdc2f56edf7ae7a29a349fb1eca210239ef33e6eb3eb39296359b8fc3132c37de575ffdabf9f1567e89a52bd88dcdd1696ec5b5d68e6c9f1f1a107f0695d14

Download Submit
\??\c:\windows\servtestdos.dll
Filesize
140KB

MD5
66920e430745ff0b65134e98d3cc851d

SHA1
4e0040a563975aa3022b9b154230544e9c2e6a8d

SHA256
270c7a6e56a60c2aa4d50ecf7049a55d37d7b4feb6836b068a346e08a7986c03

SHA512
adbdc2f56edf7ae7a29a349fb1eca210239ef33e6eb3eb39296359b8fc3132c37de575ffdabf9f1567e89a52bd88dcdd1696ec5b5d68e6c9f1f1a107f0695d14

Download Submit
memory/1560-136-0x00000000758D0000-0x0000000075917000-memory.dmp

Filesize
284KB

Download
memory/1560-137-0x00000000758D0000-0x0000000075917000-memory.dmp

Filesize
284KB

Download
memory/4876-132-0x00000000004E0000-0x0000000000527000-memory.dmp

Filesize
284KB

Download
memory/4876-133-0x00000000004E0000-0x0000000000527000-memory.dmp

Filesize
284KB

Download
memory/5036-138-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads