nymaim | a120a87049bbc78fe6651ee4b9602c5cc05666e1a7db4ac8e53c0ecbc2fd06e7

General

Target

file.exe
Size

367KB
MD5

a65f292880c2e8eb18d8b3f8686c9ed6
SHA1

22cda93e3435130c76e5afb591815b1e67d9eb50
SHA256

a120a87049bbc78fe6651ee4b9602c5cc05666e1a7db4ac8e53c0ecbc2fd06e7
SHA512

518153a542e15e589d51172ea53ab1e8bb502f14526175e60461a4f17bc1ae58507c5f1433e9d2bfb5164c6caabbabd0d17602eb5870f76faeb4c1b9c145d3a4
SSDEEP

6144:sRFGKkqeLCPp0Cz2nx14kr26ZAE+q67xrc49sFpYUuzbgwuhvbAwwVfU:sRoqe2Pp0CCnxHr2xE+q74Opunnm8Y

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

pid	Process
968	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
608	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1924	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x000a000000012322-61.dat	autoit_exe
behavioral1/files/0x000a000000012322-63.dat	autoit_exe
behavioral1/files/0x000a000000012322-64.dat	autoit_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

pid	pid_target	Process	procid_target
1088	968	WerFault.exe	32

Kills process with taskkill 1 IoCs

evasion

pid	Process
556	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1644	file.exe
1644	file.exe
1644	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1644	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	968	Cleaner.exe
Token: SeDebugPrivilege	556	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1644 wrote to memory of 1924	1644	file.exe	30
PID 1644 wrote to memory of 1924	1644	file.exe	30
PID 1644 wrote to memory of 1924	1644	file.exe	30
PID 1644 wrote to memory of 1924	1644	file.exe	30
PID 1924 wrote to memory of 968	1924	cmd.exe	32
PID 1924 wrote to memory of 968	1924	cmd.exe	32
PID 1924 wrote to memory of 968	1924	cmd.exe	32
PID 1924 wrote to memory of 968	1924	cmd.exe	32
PID 968 wrote to memory of 1088	968	Cleaner.exe	34
PID 968 wrote to memory of 1088	968	Cleaner.exe	34
PID 968 wrote to memory of 1088	968	Cleaner.exe	34
PID 1644 wrote to memory of 608	1644	file.exe	35
PID 1644 wrote to memory of 608	1644	file.exe	35
PID 1644 wrote to memory of 608	1644	file.exe	35
PID 1644 wrote to memory of 608	1644	file.exe	35
PID 608 wrote to memory of 556	608	cmd.exe	37
PID 608 wrote to memory of 556	608	cmd.exe	37
PID 608 wrote to memory of 556	608	cmd.exe	37
PID 608 wrote to memory of 556	608	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1644
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\Wf4qQVhuUgwre\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1924
- - C:\Users\Admin\AppData\Local\Temp\Wf4qQVhuUgwre\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\Wf4qQVhuUgwre\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:968
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 968 -s 1144
      4⤵
      Program crash
      PID:1088
- 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:608
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:556

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

1

T1102

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Wf4qQVhuUgwre\Bunifu_UI_v1.5.3.dll

Filesize
236KB

MD5
2ecb51ab00c5f340380ecf849291dbcf

SHA1
1a4dffbce2a4ce65495ed79eab42a4da3b660931

SHA256
f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf

SHA512
e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Wf4qQVhuUgwre\Cleaner.exe

Filesize
3.8MB

MD5
04514bd4962f7d60679434e0ebe49184

SHA1
1493a5447eb8156a7d7aecff60ee8bfba2209526

SHA256
c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568

SHA512
a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e

Download Submit
C:\Users\Admin\AppData\Local\Temp\Wf4qQVhuUgwre\Cleaner.exe

Filesize
3.8MB

MD5
04514bd4962f7d60679434e0ebe49184

SHA1
1493a5447eb8156a7d7aecff60ee8bfba2209526

SHA256
c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568

SHA512
a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e

Download Submit
\Users\Admin\AppData\Local\Temp\Wf4qQVhuUgwre\Cleaner.exe

Filesize
3.8MB

MD5
04514bd4962f7d60679434e0ebe49184

SHA1
1493a5447eb8156a7d7aecff60ee8bfba2209526

SHA256
c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568

SHA512
a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e

Download Submit
memory/968-68-0x0000000000420000-0x0000000000462000-memory.dmp

Filesize
264KB

Download
memory/968-66-0x000007FEFB881000-0x000007FEFB883000-memory.dmp

Filesize
8KB

Download
memory/968-65-0x00000000008A0000-0x00000000009F6000-memory.dmp

Filesize
1.3MB

Download
memory/1644-59-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/1644-58-0x00000000005BC000-0x00000000005E2000-memory.dmp

Filesize
152KB

Download
memory/1644-57-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/1644-54-0x0000000075A11000-0x0000000075A13000-memory.dmp

Filesize
8KB

Download
memory/1644-70-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1644-56-0x0000000000230000-0x000000000026F000-memory.dmp

Filesize
252KB

Download
memory/1644-75-0x00000000005BC000-0x00000000005E2000-memory.dmp

Filesize
152KB

Download
memory/1644-76-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/1644-55-0x00000000005BC000-0x00000000005E2000-memory.dmp

Filesize
152KB

Download

Analysis

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