nymaim | e2da3fe6413e3179962df95e4b1053624d04d344a6fc2569802c399034cd7ab5

General

Target

file.exe
Size

284KB
MD5

1d641364bd0f59de6b2d04e377c43e00
SHA1

a233c753f0e2029aeb51ad2c83caecf659a0dbe8
SHA256

e2da3fe6413e3179962df95e4b1053624d04d344a6fc2569802c399034cd7ab5
SHA512

048fec014c7a1b72d8b85b671ee5a1e4a0a4edf19779ff27691409bc83d8606c1439ab641eb4ad12643c7eaf64042a3e353d97e8e26a59b8bf061e2b95b52965
SSDEEP

3072:vLOGALx3IIfSN5HbPjhN2jUhZg5k9zMllW2BiC0xcnJWeVta28mVyRwBZU/PkkXx:kLxjf4bF0jUbgmZu9iC06Jbm28mVy

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

C2

208.67.104.97

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

Cleaner.exe

pid process

1644 Cleaner.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

960 cmd.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

1936 cmd.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
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

2016 1644 WerFault.exe Cleaner.exe
Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

1988 taskkill.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

file.exe

pid process

1768 file.exe
1768 file.exe
1768 file.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Cleaner.exetaskkill.exe

description pid process

Token: SeDebugPrivilege 1644 Cleaner.exe
Token: SeDebugPrivilege 1988 taskkill.exe

pid	process
1644	Cleaner.exe

pid	process
960	cmd.exe

pid	process
1936	cmd.exe

pid	pid_target	process	target process
2016	1644	WerFault.exe	Cleaner.exe

pid	process
1988	taskkill.exe

pid	process
1768	file.exe
1768	file.exe
1768	file.exe

description	pid	process
Token: SeDebugPrivilege	1644	Cleaner.exe
Token: SeDebugPrivilege	1988	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

file.execmd.exeCleaner.execmd.exe

description	pid	process	target process
PID 1768 wrote to memory of 1936	1768	file.exe	cmd.exe
PID 1768 wrote to memory of 1936	1768	file.exe	cmd.exe
PID 1768 wrote to memory of 1936	1768	file.exe	cmd.exe
PID 1768 wrote to memory of 1936	1768	file.exe	cmd.exe
PID 1936 wrote to memory of 1644	1936	cmd.exe	Cleaner.exe
PID 1936 wrote to memory of 1644	1936	cmd.exe	Cleaner.exe
PID 1936 wrote to memory of 1644	1936	cmd.exe	Cleaner.exe
PID 1936 wrote to memory of 1644	1936	cmd.exe	Cleaner.exe
PID 1644 wrote to memory of 2016	1644	Cleaner.exe	WerFault.exe
PID 1644 wrote to memory of 2016	1644	Cleaner.exe	WerFault.exe
PID 1644 wrote to memory of 2016	1644	Cleaner.exe	WerFault.exe
PID 1768 wrote to memory of 960	1768	file.exe	cmd.exe
PID 1768 wrote to memory of 960	1768	file.exe	cmd.exe
PID 1768 wrote to memory of 960	1768	file.exe	cmd.exe
PID 1768 wrote to memory of 960	1768	file.exe	cmd.exe
PID 960 wrote to memory of 1988	960	cmd.exe	taskkill.exe
PID 960 wrote to memory of 1988	960	cmd.exe	taskkill.exe
PID 960 wrote to memory of 1988	960	cmd.exe	taskkill.exe
PID 960 wrote to memory of 1988	960	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1768

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\ctomJQsw04sTj1Lowyg\Cleaner.exe"
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1936

C:\Users\Admin\AppData\Local\Temp\ctomJQsw04sTj1Lowyg\Cleaner.exe
"C:\Users\Admin\AppData\Local\Temp\ctomJQsw04sTj1Lowyg\Cleaner.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1644

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 1644 -s 1144
4⤵
- Program crash
PID:2016

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:960

C:\Windows\SysWOW64\taskkill.exe
taskkill /im "file.exe" /f
3⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1988

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\ctomJQsw04sTj1Lowyg\Bunifu_UI_v1.5.3.dll
Filesize
236KB

MD5
2ecb51ab00c5f340380ecf849291dbcf

SHA1
1a4dffbce2a4ce65495ed79eab42a4da3b660931

SHA256
f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf

SHA512
e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\ctomJQsw04sTj1Lowyg\Cleaner.exe
Filesize
3.8MB

MD5
23c1e8f48ec06960bbd9969c1f404192

SHA1
b9384151eb3f2dbd095fa273c248722e1cc74ea3

SHA256
301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c

SHA512
f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\ctomJQsw04sTj1Lowyg\Cleaner.exe
Filesize
3.8MB

MD5
23c1e8f48ec06960bbd9969c1f404192

SHA1
b9384151eb3f2dbd095fa273c248722e1cc74ea3

SHA256
301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c

SHA512
f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b

Download Submit
\Users\Admin\AppData\Local\Temp\ctomJQsw04sTj1Lowyg\Cleaner.exe
Filesize
3.8MB

MD5
23c1e8f48ec06960bbd9969c1f404192

SHA1
b9384151eb3f2dbd095fa273c248722e1cc74ea3

SHA256
301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c

SHA512
f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b

Download Submit
memory/960-74-0x0000000000000000-mapping.dmp

Download
memory/1644-64-0x000007FEFB621000-0x000007FEFB623000-memory.dmp

Filesize
8KB

Download
memory/1644-66-0x00000000004F0000-0x0000000000532000-memory.dmp

Filesize
264KB

Download
memory/1644-60-0x0000000000000000-mapping.dmp

Download
memory/1644-63-0x00000000010A0000-0x0000000001220000-memory.dmp

Filesize
1.5MB

Download
memory/1768-57-0x0000000000400000-0x00000000005A1000-memory.dmp

Filesize
1.6MB

Download
memory/1768-54-0x0000000075931000-0x0000000075933000-memory.dmp

Filesize
8KB

Download
memory/1768-56-0x0000000000310000-0x000000000034F000-memory.dmp

Filesize
252KB

Download
memory/1768-67-0x000000000066B000-0x0000000000692000-memory.dmp

Filesize
156KB

Download
memory/1768-68-0x0000000000400000-0x00000000005A1000-memory.dmp

Filesize
1.6MB

Download
memory/1768-70-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1768-55-0x000000000066B000-0x0000000000692000-memory.dmp

Filesize
156KB

Download
memory/1768-75-0x000000000066B000-0x0000000000692000-memory.dmp

Filesize
156KB

Download
memory/1768-76-0x0000000000400000-0x00000000005A1000-memory.dmp

Filesize
1.6MB

Download
memory/1936-58-0x0000000000000000-mapping.dmp

Download
memory/1988-77-0x0000000000000000-mapping.dmp

Download
memory/2016-69-0x0000000000000000-mapping.dmp

Download

Analysis

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