tofsee | 22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9

General

Target

22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exe
Size

212KB
MD5

0c4a0a1d43bc8a7c69fa423ea2923a9f
SHA1

fb2b154989c6fb8b6a9d9b10eb59999f5e84ce8d
SHA256

22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9
SHA512

d7060323e4a1e1366a367573a387caba66a7eb3a95b9a305461d27043beb634c101e70dda6d61b47b54e751582cb80f843b4ecaeaeca8382a3d605dca52b418b

Score

10^/10

tofsee persistence trojan

Malware Config

Extracted

Family

tofsee

C2

103.232.222.57

111.121.193.242

123.249.0.22

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Executes dropped EXE 1 IoCs

Processes:

chgjaost.exe

pid process

1652 chgjaost.exe

pid	process
1652	chgjaost.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

Processes:

22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\chgjaost.exe\""	22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

chgjaost.exe

description pid process target process

PID 1652 set thread context of 1880 1652 chgjaost.exe svchost.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4516 1880 WerFault.exe svchost.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exechgjaost.exe

pid process

2912 22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exe
1652 chgjaost.exe

description	pid	process	target process
PID 1652 set thread context of 1880	1652	chgjaost.exe	svchost.exe

pid	pid_target	process	target process
4516	1880	WerFault.exe	svchost.exe

pid	process
2912	22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exe
1652	chgjaost.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exechgjaost.exe

description	pid	process	target process
PID 2912 wrote to memory of 1652	2912	22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exe	chgjaost.exe
PID 2912 wrote to memory of 1652	2912	22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exe	chgjaost.exe
PID 2912 wrote to memory of 1652	2912	22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exe	chgjaost.exe
PID 2912 wrote to memory of 2404	2912	22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exe	cmd.exe
PID 2912 wrote to memory of 2404	2912	22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exe	cmd.exe
PID 2912 wrote to memory of 2404	2912	22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exe	cmd.exe
PID 1652 wrote to memory of 1880	1652	chgjaost.exe	svchost.exe
PID 1652 wrote to memory of 1880	1652	chgjaost.exe	svchost.exe
PID 1652 wrote to memory of 1880	1652	chgjaost.exe	svchost.exe
PID 1652 wrote to memory of 1880	1652	chgjaost.exe	svchost.exe
PID 1652 wrote to memory of 1880	1652	chgjaost.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exe
"C:\Users\Admin\AppData\Local\Temp\22b4777ab2a1d8aae71860eecab96c2fdcc6738c22536f4ff68e7c250ac1c8c9.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2912

C:\Users\Admin\chgjaost.exe
"C:\Users\Admin\chgjaost.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1652

C:\Windows\SysWOW64\svchost.exe
svchost.exe
3⤵
PID:1880

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1880 -s 468
4⤵
- Program crash
PID:4516

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\2803.bat" "
2⤵
PID:2404

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1880 -ip 1880
1⤵
PID:1244

Network

MITRE ATT&CK Matrix ATT&CK 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

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\2803.bat
Filesize
302B

MD5
73b48ef223cdd7cf4dbfeecb297b98e0

SHA1
d56e3be333b160b61e454e7ab6cc33a78d5800f3

SHA256
908a08074d991f8c7614abf11e0258155e3f19170cf57739ed9b2da09fa4153f

SHA512
067ede719f7ba787eda910df199d74954ca5807f1d551d85bf45bc47b1070128af24f5101333637cc9fe3ecf3b479c9bd2ce10f2ac7b2c5a52d4f82c1103e659

Download Submit
C:\Users\Admin\chgjaost.exe
Filesize
38.2MB

MD5
caa3ab683d352336d3243559968b7371

SHA1
e669ab8cdb359b1c3207e83772e93c89d2b04966

SHA256
4484a7d16f70e4bcbf42143e93ea49f09a9426afe28b1a3b0a6345bcff350ad8

SHA512
fe32bf3b3a166daae222dcf6d3fb995e75a5f13ecb0b28de78c7df0ee7304a2291ce1f5ff36623891ee87f7e3f76e442a29a7b375e6a22d9e18d63678a5b28b0

Download Submit
C:\Users\Admin\chgjaost.exe
Filesize
38.2MB

MD5
caa3ab683d352336d3243559968b7371

SHA1
e669ab8cdb359b1c3207e83772e93c89d2b04966

SHA256
4484a7d16f70e4bcbf42143e93ea49f09a9426afe28b1a3b0a6345bcff350ad8

SHA512
fe32bf3b3a166daae222dcf6d3fb995e75a5f13ecb0b28de78c7df0ee7304a2291ce1f5ff36623891ee87f7e3f76e442a29a7b375e6a22d9e18d63678a5b28b0

Download Submit
memory/1652-146-0x0000000002D11000-0x0000000002D16000-memory.dmp

Filesize
20KB

Download
memory/1652-157-0x0000000074C00000-0x0000000074D5D000-memory.dmp

Filesize
1.4MB

Download
memory/1652-138-0x0000000000000000-mapping.dmp

Download
memory/1880-154-0x0000000000430000-0x0000000000442000-memory.dmp

Filesize
72KB

Download
memory/1880-153-0x0000000000000000-mapping.dmp

Download
memory/1880-158-0x0000000000430000-0x0000000000442000-memory.dmp

Filesize
72KB

Download
memory/1880-159-0x0000000000430000-0x0000000000442000-memory.dmp

Filesize
72KB

Download
memory/2404-144-0x0000000000000000-mapping.dmp

Download
memory/2912-145-0x0000000074C00000-0x0000000074D5D000-memory.dmp

Filesize
1.4MB

Download
memory/2912-134-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2912-143-0x0000000074C00000-0x0000000074D5D000-memory.dmp

Filesize
1.4MB

Download
memory/2912-132-0x0000000002BF1000-0x0000000002BF6000-memory.dmp

Filesize
20KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads