nymaim | ffc415d99e35512b281f93eaa46055035efc1ee5635fec25b2c1ff1771374a68

General

Target

file.exe
Size

367KB
MD5

89211f5f9092f9d78de071e5d29d9300
SHA1

6a189bc431287ccea5600e3409c174027136322a
SHA256

ffc415d99e35512b281f93eaa46055035efc1ee5635fec25b2c1ff1771374a68
SHA512

9d0d3a0d3f8989df597e82f09a135c2e4a86dd579dd607eabe13a4a5962219e7ecd04c225824d21b17a68035e4d3264123ad7b30114d34cf7ce6f48a0bb38e78
SSDEEP

6144:sm1kqMLjz7p9RxtvF4TfWerihaa3WWuzbgwuRgwVfU:smaqMXz7pr/F4Tfn+unnJ

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
528	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1668	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
524	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/0x0009000000012732-59.dat	autoit_exe
behavioral1/files/0x0009000000012732-61.dat	autoit_exe
behavioral1/files/0x0009000000012732-62.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
1996	528	WerFault.exe	31

Kills process with taskkill 1 IoCs

evasion

pid	Process
1304	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1368	file.exe
1368	file.exe
1368	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	528	Cleaner.exe
Token: SeDebugPrivilege	1304	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1368 wrote to memory of 524	1368	file.exe	29
PID 1368 wrote to memory of 524	1368	file.exe	29
PID 1368 wrote to memory of 524	1368	file.exe	29
PID 1368 wrote to memory of 524	1368	file.exe	29
PID 524 wrote to memory of 528	524	cmd.exe	31
PID 524 wrote to memory of 528	524	cmd.exe	31
PID 524 wrote to memory of 528	524	cmd.exe	31
PID 524 wrote to memory of 528	524	cmd.exe	31
PID 528 wrote to memory of 1996	528	Cleaner.exe	33
PID 528 wrote to memory of 1996	528	Cleaner.exe	33
PID 528 wrote to memory of 1996	528	Cleaner.exe	33
PID 1368 wrote to memory of 1668	1368	file.exe	34
PID 1368 wrote to memory of 1668	1368	file.exe	34
PID 1368 wrote to memory of 1668	1368	file.exe	34
PID 1368 wrote to memory of 1668	1368	file.exe	34
PID 1668 wrote to memory of 1304	1668	cmd.exe	36
PID 1668 wrote to memory of 1304	1668	cmd.exe	36
PID 1668 wrote to memory of 1304	1668	cmd.exe	36
PID 1668 wrote to memory of 1304	1668	cmd.exe	36

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:1368
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\ai1RBc9mzPXpxdtsvSruBFwTTsnnu\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:524
- - C:\Users\Admin\AppData\Local\Temp\ai1RBc9mzPXpxdtsvSruBFwTTsnnu\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\ai1RBc9mzPXpxdtsvSruBFwTTsnnu\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:528
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 528 -s 1160
      4⤵
      Program crash
      PID:1996
- 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:1668
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1304

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\ai1RBc9mzPXpxdtsvSruBFwTTsnnu\Bunifu_UI_v1.5.3.dll

Filesize
236KB

MD5
2ecb51ab00c5f340380ecf849291dbcf

SHA1
1a4dffbce2a4ce65495ed79eab42a4da3b660931

SHA256
f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf

SHA512
e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\ai1RBc9mzPXpxdtsvSruBFwTTsnnu\Cleaner.exe

Filesize
3.8MB

MD5
04514bd4962f7d60679434e0ebe49184

SHA1
1493a5447eb8156a7d7aecff60ee8bfba2209526

SHA256
c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568

SHA512
a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e

Download Submit
C:\Users\Admin\AppData\Local\Temp\ai1RBc9mzPXpxdtsvSruBFwTTsnnu\Cleaner.exe

Filesize
3.8MB

MD5
04514bd4962f7d60679434e0ebe49184

SHA1
1493a5447eb8156a7d7aecff60ee8bfba2209526

SHA256
c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568

SHA512
a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e

Download Submit
\Users\Admin\AppData\Local\Temp\ai1RBc9mzPXpxdtsvSruBFwTTsnnu\Cleaner.exe

Filesize
3.8MB

MD5
04514bd4962f7d60679434e0ebe49184

SHA1
1493a5447eb8156a7d7aecff60ee8bfba2209526

SHA256
c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568

SHA512
a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e

Download Submit
memory/528-66-0x000007FEFBC71000-0x000007FEFBC73000-memory.dmp

Filesize
8KB

Download
memory/528-68-0x00000000005E0000-0x0000000000622000-memory.dmp

Filesize
264KB

Download
memory/528-63-0x0000000001330000-0x0000000001486000-memory.dmp

Filesize
1.3MB

Download
memory/1368-64-0x000000000028C000-0x00000000002B2000-memory.dmp

Filesize
152KB

Download
memory/1368-65-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/1368-54-0x0000000076071000-0x0000000076073000-memory.dmp

Filesize
8KB

Download
memory/1368-57-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/1368-56-0x0000000000470000-0x00000000004AF000-memory.dmp

Filesize
252KB

Download
memory/1368-70-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1368-75-0x000000000028C000-0x00000000002B2000-memory.dmp

Filesize
152KB

Download
memory/1368-76-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/1368-55-0x000000000028C000-0x00000000002B2000-memory.dmp

Filesize
152KB

Download

Analysis

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