3020a4efd8f317257bf1864706a7de58dcbfd53f613fc010d8825fe34aceb412

General

Target

0a90efe9b370fc21524b088a47efe5d4.exe
Size

548KB
MD5

0a90efe9b370fc21524b088a47efe5d4
SHA1

5f50b051423ec944f403a09edef27171f147587a
SHA256

3020a4efd8f317257bf1864706a7de58dcbfd53f613fc010d8825fe34aceb412
SHA512

fd4084409d11e931cbe184fa0337d72ee865971dac741b1528b57d53652c3953ca3fc7086e894da205ce69b0da18735be520ee364e8eb6fd798abdffb14a908f
SSDEEP

12288:gnNhuBoY8SorxgmA+nlvVlJQO4I0Wc3EYjJFs8bLYMBUdaHAM4uo:gPatCg7EPUVNlQHQi

Score

10^/10

evasion persistence trojan upx

Malware Config

Signatures

Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	0a90efe9b370fc21524b088a47efe5d4.exe

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	0a90efe9b370fc21524b088a47efe5d4.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\csrcs = "C:\\Windows\\system32\\csrcs.exe"	0a90efe9b370fc21524b088a47efe5d4.exe

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-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	0a90efe9b370fc21524b088a47efe5d4.exe

Executes dropped EXE 1 IoCs

pid	Process
4928	csrcs.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1984-133-0x0000000000400000-0x00000000004CC000-memory.dmp	upx
behavioral2/files/0x00020000000230fe-146.dat	upx
behavioral2/files/0x00020000000230fe-202.dat	upx
behavioral2/files/0x00020000000230fe-203.dat	upx
behavioral2/memory/4928-212-0x0000000000400000-0x00000000004CC000-memory.dmp	upx
behavioral2/memory/1984-213-0x0000000000400000-0x00000000004CC000-memory.dmp	upx
behavioral2/memory/4928-214-0x0000000000400000-0x00000000004CC000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\RunServices	0a90efe9b370fc21524b088a47efe5d4.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunServices\csrcs = "C:\\Windows\\system32\\csrcs.exe"	0a90efe9b370fc21524b088a47efe5d4.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	0a90efe9b370fc21524b088a47efe5d4.exe

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/4928-212-0x0000000000400000-0x00000000004CC000-memory.dmp	autoit_exe
behavioral2/memory/1984-213-0x0000000000400000-0x00000000004CC000-memory.dmp	autoit_exe
behavioral2/memory/4928-214-0x0000000000400000-0x00000000004CC000-memory.dmp	autoit_exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\csrcs.exe	0a90efe9b370fc21524b088a47efe5d4.exe
File opened for modification	C:\Windows\SysWOW64\csrcs.exe	0a90efe9b370fc21524b088a47efe5d4.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	0a90efe9b370fc21524b088a47efe5d4.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1984	0a90efe9b370fc21524b088a47efe5d4.exe
1984	0a90efe9b370fc21524b088a47efe5d4.exe
1984	0a90efe9b370fc21524b088a47efe5d4.exe
1984	0a90efe9b370fc21524b088a47efe5d4.exe
1984	0a90efe9b370fc21524b088a47efe5d4.exe
1984	0a90efe9b370fc21524b088a47efe5d4.exe
4928	csrcs.exe
4928	csrcs.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1984 wrote to memory of 4928	1984	0a90efe9b370fc21524b088a47efe5d4.exe	87
PID 1984 wrote to memory of 4928	1984	0a90efe9b370fc21524b088a47efe5d4.exe	87
PID 1984 wrote to memory of 4928	1984	0a90efe9b370fc21524b088a47efe5d4.exe	87

C:\Users\Admin\AppData\Local\Temp\0a90efe9b370fc21524b088a47efe5d4.exe
"C:\Users\Admin\AppData\Local\Temp\0a90efe9b370fc21524b088a47efe5d4.exe"
1⤵
- Modifies visiblity of hidden/system files in Explorer
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1984
- C:\Windows\SysWOW64\csrcs.exe
  "C:\Windows\System32\csrcs.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  PID:4928

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

1

T1158

Registry Run Keys / Startup Folder

2

T1060

Privilege Escalation

Defense Evasion

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Query Registry

1

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\bejlezn

Filesize
89KB

MD5
3fb231ba9b98a0b534b366461db93a53

SHA1
f07a1b75f10a7beffe4f07e9cf1f077f58ea1700

SHA256
63f3bd1984638f9ab3237b99f08f7dcb162a230b4ebae88b8f48b5d176dfe7f6

SHA512
93f8552b3672ce7cfc79b77ba8230d6e3e5e35c6ec8c34846722681ad14cb7bc0e76409f560a7e7dbf4754c69a561007a9bd453b18fabe1298c1a4c8c918b26a

Download Submit
C:\Windows\SysWOW64\csrcs.exe

Filesize
548KB

MD5
0a90efe9b370fc21524b088a47efe5d4

SHA1
5f50b051423ec944f403a09edef27171f147587a

SHA256
3020a4efd8f317257bf1864706a7de58dcbfd53f613fc010d8825fe34aceb412

SHA512
fd4084409d11e931cbe184fa0337d72ee865971dac741b1528b57d53652c3953ca3fc7086e894da205ce69b0da18735be520ee364e8eb6fd798abdffb14a908f

Download Submit
C:\Windows\SysWOW64\csrcs.exe

Filesize
548KB

MD5
0a90efe9b370fc21524b088a47efe5d4

SHA1
5f50b051423ec944f403a09edef27171f147587a

SHA256
3020a4efd8f317257bf1864706a7de58dcbfd53f613fc010d8825fe34aceb412

SHA512
fd4084409d11e931cbe184fa0337d72ee865971dac741b1528b57d53652c3953ca3fc7086e894da205ce69b0da18735be520ee364e8eb6fd798abdffb14a908f

Download Submit
C:\Windows\SysWOW64\csrcs.exe

Filesize
548KB

MD5
0a90efe9b370fc21524b088a47efe5d4

SHA1
5f50b051423ec944f403a09edef27171f147587a

SHA256
3020a4efd8f317257bf1864706a7de58dcbfd53f613fc010d8825fe34aceb412

SHA512
fd4084409d11e931cbe184fa0337d72ee865971dac741b1528b57d53652c3953ca3fc7086e894da205ce69b0da18735be520ee364e8eb6fd798abdffb14a908f

Download Submit
memory/1984-133-0x0000000000400000-0x00000000004CC000-memory.dmp

Filesize
816KB

Download
memory/1984-213-0x0000000000400000-0x00000000004CC000-memory.dmp

Filesize
816KB

Download
memory/4928-212-0x0000000000400000-0x00000000004CC000-memory.dmp

Filesize
816KB

Download
memory/4928-214-0x0000000000400000-0x00000000004CC000-memory.dmp

Filesize
816KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads