9d5e19acb918040dcf79ccff74833262fb19f5460f51587d265210374f6f1884

General

Target

NAMUJS_ETRANSFER_RECEIPT.exe
Size

300.0MB
MD5

aa16895db009a8b646bb9c51f9b51c58
SHA1

014b372bc0620fb1173679abb7c189d0464ce208
SHA256

72656944adc7c9dabbc263d8a1c7f79ff6d0b6a3b06a11f88b741977c5e4f751
SHA512

4411e718c124059044ab7fbe54f3fefa76c9d5cd2263c4214c70a498d681f87f2804aef0e8c94b630fadf9470d5e804702349ab21fafa512a368d90424d8e29b
SSDEEP

24576:GzEo/IReVjVaXcqqza/KkJVWpcpr8lCGyi2FBGbZLipIjJ7Fb5DIoN3EtO:GziCYXKzyKkJM8r8lXyEGpIjJ73jtEt

Score

8^/10

upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

olkij.exe

pid process

908 olkij.exe

pid	process
908	olkij.exe

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
behavioral6/memory/4044-139-0x0000000000700000-0x0000000000AE4000-memory.dmp	upx
behavioral6/memory/4044-140-0x0000000000700000-0x0000000000AE4000-memory.dmp	upx

Suspicious use of SetThreadContext 1 IoCs

Processes:

NAMUJS_ETRANSFER_RECEIPT.exe

description pid process target process

PID 4808 set thread context of 4044 4808 NAMUJS_ETRANSFER_RECEIPT.exe RegAsm.exe
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

1260 4044 WerFault.exe RegAsm.exe
2936 4044 WerFault.exe RegAsm.exe
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exe

pid process

4460 schtasks.exe
4204 schtasks.exe

description	pid	process	target process
PID 4808 set thread context of 4044	4808	NAMUJS_ETRANSFER_RECEIPT.exe	RegAsm.exe

pid	pid_target	process	target process
1260	4044	WerFault.exe	RegAsm.exe
2936	4044	WerFault.exe	RegAsm.exe

pid	process
4460	schtasks.exe
4204	schtasks.exe

Suspicious use of WriteProcessMemory 32 IoCs

Processes:

NAMUJS_ETRANSFER_RECEIPT.execmd.exeolkij.execmd.exe

description	pid	process	target process
PID 4808 wrote to memory of 1940	4808	NAMUJS_ETRANSFER_RECEIPT.exe	cmd.exe
PID 4808 wrote to memory of 1940	4808	NAMUJS_ETRANSFER_RECEIPT.exe	cmd.exe
PID 4808 wrote to memory of 1940	4808	NAMUJS_ETRANSFER_RECEIPT.exe	cmd.exe
PID 4808 wrote to memory of 1532	4808	NAMUJS_ETRANSFER_RECEIPT.exe	cmd.exe
PID 4808 wrote to memory of 1532	4808	NAMUJS_ETRANSFER_RECEIPT.exe	cmd.exe
PID 4808 wrote to memory of 1532	4808	NAMUJS_ETRANSFER_RECEIPT.exe	cmd.exe
PID 1940 wrote to memory of 4460	1940	cmd.exe	schtasks.exe
PID 1940 wrote to memory of 4460	1940	cmd.exe	schtasks.exe
PID 1940 wrote to memory of 4460	1940	cmd.exe	schtasks.exe
PID 4808 wrote to memory of 4044	4808	NAMUJS_ETRANSFER_RECEIPT.exe	RegAsm.exe
PID 4808 wrote to memory of 4044	4808	NAMUJS_ETRANSFER_RECEIPT.exe	RegAsm.exe
PID 4808 wrote to memory of 4044	4808	NAMUJS_ETRANSFER_RECEIPT.exe	RegAsm.exe
PID 4808 wrote to memory of 4044	4808	NAMUJS_ETRANSFER_RECEIPT.exe	RegAsm.exe
PID 4808 wrote to memory of 4044	4808	NAMUJS_ETRANSFER_RECEIPT.exe	RegAsm.exe
PID 4808 wrote to memory of 4044	4808	NAMUJS_ETRANSFER_RECEIPT.exe	RegAsm.exe
PID 4808 wrote to memory of 4044	4808	NAMUJS_ETRANSFER_RECEIPT.exe	RegAsm.exe
PID 908 wrote to memory of 396	908	olkij.exe	cmd.exe
PID 908 wrote to memory of 396	908	olkij.exe	cmd.exe
PID 908 wrote to memory of 396	908	olkij.exe	cmd.exe
PID 908 wrote to memory of 4628	908	olkij.exe	cmd.exe
PID 908 wrote to memory of 4628	908	olkij.exe	cmd.exe
PID 908 wrote to memory of 4628	908	olkij.exe	cmd.exe
PID 396 wrote to memory of 4204	396	cmd.exe	schtasks.exe
PID 396 wrote to memory of 4204	396	cmd.exe	schtasks.exe
PID 396 wrote to memory of 4204	396	cmd.exe	schtasks.exe
PID 908 wrote to memory of 1960	908	olkij.exe	RegAsm.exe
PID 908 wrote to memory of 1960	908	olkij.exe	RegAsm.exe
PID 908 wrote to memory of 1960	908	olkij.exe	RegAsm.exe
PID 908 wrote to memory of 1960	908	olkij.exe	RegAsm.exe
PID 908 wrote to memory of 1960	908	olkij.exe	RegAsm.exe
PID 908 wrote to memory of 1960	908	olkij.exe	RegAsm.exe
PID 908 wrote to memory of 1960	908	olkij.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\NAMUJS_ETRANSFER_RECEIPT.exe
"C:\Users\Admin\AppData\Local\Temp\NAMUJS_ETRANSFER_RECEIPT.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4808

C:\Windows\SysWOW64\cmd.exe
"cmd" /c schtasks /create /sc minute /mo 1 /tn "Nafdfnasia" /tr "'C:\Users\Admin\AppData\Local\Temp\olkij.exe'" /f
2⤵
- Suspicious use of WriteProcessMemory
PID:1940

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /sc minute /mo 1 /tn "Nafdfnasia" /tr "'C:\Users\Admin\AppData\Local\Temp\olkij.exe'" /f
3⤵
- Creates scheduled task(s)
PID:4460

C:\Windows\SysWOW64\cmd.exe
"cmd" /c copy "C:\Users\Admin\AppData\Local\Temp\NAMUJS_ETRANSFER_RECEIPT.exe" "C:\Users\Admin\AppData\Local\Temp\olkij.exe"
2⤵
PID:1532

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
PID:4044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4044 -s 572
3⤵
- Program crash
PID:1260

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4044 -s 620
3⤵
- Program crash
PID:2936

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4044 -ip 4044
1⤵
PID:1344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 4044 -ip 4044
1⤵
PID:2368

C:\Users\Admin\AppData\Local\Temp\olkij.exe
C:\Users\Admin\AppData\Local\Temp\olkij.exe
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:908

C:\Windows\SysWOW64\cmd.exe
"cmd" /c schtasks /create /sc minute /mo 1 /tn "Nafdfnasia" /tr "'C:\Users\Admin\AppData\Local\Temp\olkij.exe'" /f
2⤵
- Suspicious use of WriteProcessMemory
PID:396

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /sc minute /mo 1 /tn "Nafdfnasia" /tr "'C:\Users\Admin\AppData\Local\Temp\olkij.exe'" /f
3⤵
- Creates scheduled task(s)
PID:4204

C:\Windows\SysWOW64\cmd.exe
"cmd" /c copy "C:\Users\Admin\AppData\Local\Temp\olkij.exe" "C:\Users\Admin\AppData\Local\Temp\olkij.exe"
2⤵
PID:4628

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
PID:1960

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
300.0MB

MD5
aa16895db009a8b646bb9c51f9b51c58

SHA1
014b372bc0620fb1173679abb7c189d0464ce208

SHA256
72656944adc7c9dabbc263d8a1c7f79ff6d0b6a3b06a11f88b741977c5e4f751

SHA512
4411e718c124059044ab7fbe54f3fefa76c9d5cd2263c4214c70a498d681f87f2804aef0e8c94b630fadf9470d5e804702349ab21fafa512a368d90424d8e29b

Download Submit
C:\Users\Admin\AppData\Local\Temp\olkij.exe

Filesize
300.0MB

MD5
aa16895db009a8b646bb9c51f9b51c58

SHA1
014b372bc0620fb1173679abb7c189d0464ce208

SHA256
72656944adc7c9dabbc263d8a1c7f79ff6d0b6a3b06a11f88b741977c5e4f751

SHA512
4411e718c124059044ab7fbe54f3fefa76c9d5cd2263c4214c70a498d681f87f2804aef0e8c94b630fadf9470d5e804702349ab21fafa512a368d90424d8e29b

Download Submit
memory/396-143-0x0000000000000000-mapping.dmp

Download
memory/1532-135-0x0000000000000000-mapping.dmp

Download
memory/1940-134-0x0000000000000000-mapping.dmp

Download
memory/1960-146-0x0000000000000000-mapping.dmp

Download
memory/4044-137-0x0000000000000000-mapping.dmp

Download
memory/4044-139-0x0000000000700000-0x0000000000AE4000-memory.dmp

Filesize
3.9MB

Download
memory/4044-140-0x0000000000700000-0x0000000000AE4000-memory.dmp

Filesize
3.9MB

Download
memory/4204-145-0x0000000000000000-mapping.dmp

Download
memory/4460-136-0x0000000000000000-mapping.dmp

Download
memory/4628-144-0x0000000000000000-mapping.dmp

Download
memory/4808-132-0x0000000000EC0000-0x000000000104A000-memory.dmp

Filesize
1.5MB

Download
memory/4808-133-0x0000000006130000-0x00000000066D4000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads