nymaim | 146657b5b652336f4363d5a5d55173981c3dabfa0b2aa01b15c8db312f2c206f

General

Target

file.exe
Size

288KB
MD5

cd20b120a8696e6aefe6410f2c96e971
SHA1

bed483f25a1e0d957d7fe7947d0165c1aa0449d0
SHA256

146657b5b652336f4363d5a5d55173981c3dabfa0b2aa01b15c8db312f2c206f
SHA512

cd558693824acfe8ba9987c44cc10bdf586fc704f46c6ce6f1d9d88517a57b11d3531f742df913927e68874ef5ad0120703a0f24783137dbf68d820310d6e1ba
SSDEEP

3072:FwOW4Jn9LRbtElI85BxP9Jn5Mqs3kNszrkpLOWYYIRxQMKezfCyYF3pTKSeTwXUk:FrF9LUlzxbnGRILVMKcfC53poMX

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
828	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1652	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
876	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

pid	pid_target	Process	procid_target
1160	828	WerFault.exe	32

Kills process with taskkill 1 IoCs

evasion

pid	Process
552	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1736	file.exe
1736	file.exe
1736	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	828	Cleaner.exe
Token: SeDebugPrivilege	552	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1736 wrote to memory of 876	1736	file.exe	30
PID 1736 wrote to memory of 876	1736	file.exe	30
PID 1736 wrote to memory of 876	1736	file.exe	30
PID 1736 wrote to memory of 876	1736	file.exe	30
PID 876 wrote to memory of 828	876	cmd.exe	32
PID 876 wrote to memory of 828	876	cmd.exe	32
PID 876 wrote to memory of 828	876	cmd.exe	32
PID 876 wrote to memory of 828	876	cmd.exe	32
PID 828 wrote to memory of 1160	828	Cleaner.exe	34
PID 828 wrote to memory of 1160	828	Cleaner.exe	34
PID 828 wrote to memory of 1160	828	Cleaner.exe	34
PID 1736 wrote to memory of 1652	1736	file.exe	35
PID 1736 wrote to memory of 1652	1736	file.exe	35
PID 1736 wrote to memory of 1652	1736	file.exe	35
PID 1736 wrote to memory of 1652	1736	file.exe	35
PID 1652 wrote to memory of 552	1652	cmd.exe	37
PID 1652 wrote to memory of 552	1652	cmd.exe	37
PID 1652 wrote to memory of 552	1652	cmd.exe	37
PID 1652 wrote to memory of 552	1652	cmd.exe	37

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:1736
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\zF4HhH10YNUEAqgm0eacm3\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:876
- - C:\Users\Admin\AppData\Local\Temp\zF4HhH10YNUEAqgm0eacm3\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\zF4HhH10YNUEAqgm0eacm3\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:828
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 828 -s 1076
      4⤵
      Program crash
      PID:1160
- 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:1652
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:552

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\zF4HhH10YNUEAqgm0eacm3\Bunifu_UI_v1.5.3.dll

Filesize
236KB

MD5
2ecb51ab00c5f340380ecf849291dbcf

SHA1
1a4dffbce2a4ce65495ed79eab42a4da3b660931

SHA256
f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf

SHA512
e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\zF4HhH10YNUEAqgm0eacm3\Cleaner.exe

Filesize
3.8MB

MD5
23c1e8f48ec06960bbd9969c1f404192

SHA1
b9384151eb3f2dbd095fa273c248722e1cc74ea3

SHA256
301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c

SHA512
f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\zF4HhH10YNUEAqgm0eacm3\Cleaner.exe

Filesize
3.8MB

MD5
23c1e8f48ec06960bbd9969c1f404192

SHA1
b9384151eb3f2dbd095fa273c248722e1cc74ea3

SHA256
301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c

SHA512
f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b

Download Submit
\Users\Admin\AppData\Local\Temp\zF4HhH10YNUEAqgm0eacm3\Cleaner.exe

Filesize
3.8MB

MD5
23c1e8f48ec06960bbd9969c1f404192

SHA1
b9384151eb3f2dbd095fa273c248722e1cc74ea3

SHA256
301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c

SHA512
f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b

Download Submit
memory/552-77-0x0000000000000000-mapping.dmp

Download
memory/828-64-0x000007FEFB741000-0x000007FEFB743000-memory.dmp

Filesize
8KB

Download
memory/828-66-0x0000000000500000-0x0000000000542000-memory.dmp

Filesize
264KB

Download
memory/828-63-0x0000000000B80000-0x0000000000D00000-memory.dmp

Filesize
1.5MB

Download
memory/828-60-0x0000000000000000-mapping.dmp

Download
memory/876-58-0x0000000000000000-mapping.dmp

Download
memory/1160-69-0x0000000000000000-mapping.dmp

Download
memory/1652-74-0x0000000000000000-mapping.dmp

Download
memory/1736-55-0x000000000071B000-0x0000000000742000-memory.dmp

Filesize
156KB

Download
memory/1736-54-0x0000000075DA1000-0x0000000075DA3000-memory.dmp

Filesize
8KB

Download
memory/1736-57-0x0000000000400000-0x00000000005A2000-memory.dmp

Filesize
1.6MB

Download
memory/1736-67-0x000000000071B000-0x0000000000742000-memory.dmp

Filesize
156KB

Download
memory/1736-68-0x0000000000400000-0x00000000005A2000-memory.dmp

Filesize
1.6MB

Download
memory/1736-70-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1736-75-0x000000000071B000-0x0000000000742000-memory.dmp

Filesize
156KB

Download
memory/1736-76-0x0000000000400000-0x00000000005A2000-memory.dmp

Filesize
1.6MB

Download
memory/1736-56-0x0000000000220000-0x000000000025F000-memory.dmp

Filesize
252KB

Download

Analysis

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