nymaim | 8ec72faef5f0fcd1c8b3c5371eb3f9bd8beeefa034f7fc4750168df49e35a69f

Analysis

max time kernel
56s
max time network
60s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
10/10/2022, 10:06

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General

Target
file.exe
Size 406KB
Sample221010-l43z8sbfar
SHA256 8ec72faef5f0fcd1c8b3c5371eb3f9bd8beeefa034f7fc4750168df49e35a69f
MD5 55c0f803a6f225c8d99cf5649bcde8a2
SHA1 e4235a1a602a4e1bc2ff3b8fe6d1eece837c6d46
SHA512 0f51225afbcdf0322442dadcd916e68ad0a1673ae1b64df0354c1e3c938aacb54b2e4c69ed8e01ca57d27b7466f1d1bfa90bebe58fdb629250addc63c749768a
SSDEEP 6144:pn0aK52xZ86pYYyaihvjhbetJNk8Dy2i16kK0gLQmPC6nCrwVfquS:pnw52k6pYGiLetJS2iIkTNYVnCd
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

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

Executes dropped EXE 1 IoCs

pid	Process
1644	9xnHOa5ZGTcRp.exe

Deletes itself 1 IoCs

pid	Process
1476	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1348	file.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
1332	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1348	file.exe
1348	file.exe
1348	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1332	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1348 wrote to memory of 1644	1348	file.exe	29
PID 1348 wrote to memory of 1644	1348	file.exe	29
PID 1348 wrote to memory of 1644	1348	file.exe	29
PID 1348 wrote to memory of 1644	1348	file.exe	29
PID 1348 wrote to memory of 1476	1348	file.exe	30
PID 1348 wrote to memory of 1476	1348	file.exe	30
PID 1348 wrote to memory of 1476	1348	file.exe	30
PID 1348 wrote to memory of 1476	1348	file.exe	30
PID 1476 wrote to memory of 1332	1476	cmd.exe	32
PID 1476 wrote to memory of 1332	1476	cmd.exe	32
PID 1476 wrote to memory of 1332	1476	cmd.exe	32
PID 1476 wrote to memory of 1332	1476	cmd.exe	32

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1348
- C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\9xnHOa5ZGTcRp.exe
  2⤵
  - Executes dropped EXE
  PID:1644
- 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:1476
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1332

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

9xnHOa5ZGTcRp.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\9xnHOa5ZGTcRp.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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9xnHOa5ZGTcRp.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\9xnHOa5ZGTcRp.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/1348-54-0x0000000075601000-0x0000000075603000-memory.dmp

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memory/1348-56-0x0000000001C50000-0x0000000001CA3000-memory.dmp

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memory/1348-55-0x00000000002EA000-0x000000000031A000-memory.dmp

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memory/1348-57-0x0000000000400000-0x000000000046B000-memory.dmp

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memory/1348-61-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1348-65-0x0000000000400000-0x000000000046B000-memory.dmp

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memory/1348-67-0x0000000000400000-0x000000000046B000-memory.dmp

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