570deeabd96f1f8231526c14405f83e14621c2a5e275c5f052437451ed49da4d

General

Target

virussign.com_98770af63def2b3ac13d412f41811190.exe
Size

35KB
MD5

98770af63def2b3ac13d412f41811190
SHA1

86dda250969083d417987bdb87d89e797c1066db
SHA256

570deeabd96f1f8231526c14405f83e14621c2a5e275c5f052437451ed49da4d
SHA512

98380a9293bafd3acdcda2bce69b37d1095e5246f5a641ff20f915888fdbf6f87125717175e2cb671b9a0a4e03c4c61908b8a1f27142620f7db2d84d4913df39
SSDEEP

768:M3EVdV0YXY/nckNsWheCNSdd57Do5utsp1TOIIIwjky:lVdm5/nprh3Ny57guSTOjz

Score

8^/10

evasion upx

Malware Config

Signatures

Sets file to hidden 1 TTPs 1 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
3864	attrib.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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	virussign.com_98770af63def2b3ac13d412f41811190.exe

Executes dropped EXE 1 IoCs

pid	Process
1700	jkmhost.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1216-0-0x0000000000400000-0x0000000000417000-memory.dmp	upx
behavioral2/files/0x0007000000023276-3.dat	upx
behavioral2/memory/1700-5-0x0000000000400000-0x0000000000417000-memory.dmp	upx
behavioral2/memory/1216-7-0x0000000000400000-0x0000000000417000-memory.dmp	upx
behavioral2/memory/1700-8-0x0000000000400000-0x0000000000417000-memory.dmp	upx
behavioral2/memory/1700-14-0x0000000000400000-0x0000000000417000-memory.dmp	upx
behavioral2/memory/1700-17-0x0000000000400000-0x0000000000417000-memory.dmp	upx
behavioral2/memory/1700-20-0x0000000000400000-0x0000000000417000-memory.dmp	upx

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Debug\jkmhost.exe	virussign.com_98770af63def2b3ac13d412f41811190.exe
File opened for modification	C:\Windows\Debug\jkmhost.exe	virussign.com_98770af63def2b3ac13d412f41811190.exe
File opened for modification	C:\Windows\Debug\jkmhost.exe	attrib.exe

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

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

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

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	1216	virussign.com_98770af63def2b3ac13d412f41811190.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1216 wrote to memory of 3864	1216	virussign.com_98770af63def2b3ac13d412f41811190.exe	85
PID 1216 wrote to memory of 3864	1216	virussign.com_98770af63def2b3ac13d412f41811190.exe	85
PID 1216 wrote to memory of 3864	1216	virussign.com_98770af63def2b3ac13d412f41811190.exe	85
PID 1216 wrote to memory of 5064	1216	virussign.com_98770af63def2b3ac13d412f41811190.exe	91
PID 1216 wrote to memory of 5064	1216	virussign.com_98770af63def2b3ac13d412f41811190.exe	91
PID 1216 wrote to memory of 5064	1216	virussign.com_98770af63def2b3ac13d412f41811190.exe	91

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3864	attrib.exe

C:\Users\Admin\AppData\Local\Temp\virussign.com_98770af63def2b3ac13d412f41811190.exe
"C:\Users\Admin\AppData\Local\Temp\virussign.com_98770af63def2b3ac13d412f41811190.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1216
- C:\Windows\SysWOW64\attrib.exe
  attrib +a +s +h +r C:\Windows\Debug\jkmhost.exe
  2⤵
  - Sets file to hidden
  - Drops file in Windows directory
  - Views/modifies file attributes
  PID:3864
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\VIRUSS~1.EXE > nul
  2⤵
  PID:5064

C:\Windows\Debug\jkmhost.exe
C:\Windows\Debug\jkmhost.exe
1⤵
- Executes dropped EXE
- Checks processor information in registry
PID:1700

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

2

T1564.001

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:\Windows\debug\jkmhost.exe

Filesize
35KB

MD5
b54a0bb3f355fc4d632fd804f0dd3988

SHA1
6fe72ea7b446e16828586c4641283e1428871517

SHA256
c4bf1be5b2c3e74cd488e0b5020dd7c0d66972dc0f4b18df9d7d009d0e6db756

SHA512
71547ff5aeaba4cbb8560b66400fee2fefc4c179239be245137b1d5bf6b94de4b898340e10f36f32449e7762ff247c83f1a944a0d506343f4933eb3386704a88

Download Submit
memory/1216-0-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1216-7-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1700-5-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1700-8-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1700-14-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1700-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1700-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads