nymaim | a193466d36b1797b5397927bbbabbb4ac219263f52a7d204532163eaa6425101

General

Target

file.exe
Size

1.2MB
MD5

6160873f40577e48246558b10ab40395
SHA1

e6f652e10360142635df490a01d9f28ee5d639c1
SHA256

a193466d36b1797b5397927bbbabbb4ac219263f52a7d204532163eaa6425101
SHA512

575570f55cad1d0ebd30ce963bfd4fd3fa93774948747b3afa7d70e1f3af1c2740e1052d5f9c66b71d4c81e27c8aece83914b38076bb30f4c2e75717156fc962
SSDEEP

24576:RizuC7C/43xeuW7Wo0gyS+Tz/XCo0x41+tv1NHPZySa4igZIY7eCLxYiL:6uQ8C3Magr+TGvLZzNeViL

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

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 3 IoCs

pid	Process
3216	is-HVMO9.tmp
4508	PrintFolders.exe
2284	KK80DFFCm3YgVf.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
3216	is-HVMO9.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-HVMO9.tmp
File created	C:\Program Files (x86)\PrintFolders\is-O1KVN.tmp	is-HVMO9.tmp
File created	C:\Program Files (x86)\PrintFolders\is-F18TR.tmp	is-HVMO9.tmp
File created	C:\Program Files (x86)\PrintFolders\is-MBT6V.tmp	is-HVMO9.tmp
File created	C:\Program Files (x86)\PrintFolders\is-7113N.tmp	is-HVMO9.tmp
File created	C:\Program Files (x86)\PrintFolders\is-IC293.tmp	is-HVMO9.tmp
File created	C:\Program Files (x86)\PrintFolders\is-B9UA3.tmp	is-HVMO9.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-HVMO9.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-HVMO9.tmp

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
2064	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4508	PrintFolders.exe
4508	PrintFolders.exe
4508	PrintFolders.exe
4508	PrintFolders.exe
4508	PrintFolders.exe
4508	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2064	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2440 wrote to memory of 3216	2440	file.exe	80
PID 2440 wrote to memory of 3216	2440	file.exe	80
PID 2440 wrote to memory of 3216	2440	file.exe	80
PID 3216 wrote to memory of 4508	3216	is-HVMO9.tmp	81
PID 3216 wrote to memory of 4508	3216	is-HVMO9.tmp	81
PID 3216 wrote to memory of 4508	3216	is-HVMO9.tmp	81
PID 4508 wrote to memory of 2284	4508	PrintFolders.exe	82
PID 4508 wrote to memory of 2284	4508	PrintFolders.exe	82
PID 4508 wrote to memory of 2284	4508	PrintFolders.exe	82
PID 4508 wrote to memory of 64	4508	PrintFolders.exe	91
PID 4508 wrote to memory of 64	4508	PrintFolders.exe	91
PID 4508 wrote to memory of 64	4508	PrintFolders.exe	91
PID 64 wrote to memory of 2064	64	cmd.exe	93
PID 64 wrote to memory of 2064	64	cmd.exe	93
PID 64 wrote to memory of 2064	64	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2440
- C:\Users\Admin\AppData\Local\Temp\is-RF9B9.tmp\is-HVMO9.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-RF9B9.tmp\is-HVMO9.tmp" /SL4 $C01CC "C:\Users\Admin\AppData\Local\Temp\file.exe" 1070504 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3216
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4508
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\KK80DFFCm3YgVf.exe
      4⤵
      Executes dropped EXE
      PID:2284
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:64
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2064

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\PrintFolders\PrintFolders.exe

Filesize
1.4MB

MD5
eacd414de446ebdd8f1c7ccbef29c748

SHA1
a9221e67b9de6a07fce4ed5e1fa96d3e0970727c

SHA256
bbac52a3e026008f9e61e8aa1b1066ae807f560179ef1bb78ff7b4513c0a8c1d

SHA512
3d15d51dd47a27aaf6d27950c90e84bbf3930a6a1affe7bc5c6df0f1830a8e689dc63b32df9745d1ad7b975e230553379bec1001d89a23661dd01f26d255dc9d

Download Submit
C:\Program Files (x86)\PrintFolders\PrintFolders.exe

Filesize
1.4MB

MD5
eacd414de446ebdd8f1c7ccbef29c748

SHA1
a9221e67b9de6a07fce4ed5e1fa96d3e0970727c

SHA256
bbac52a3e026008f9e61e8aa1b1066ae807f560179ef1bb78ff7b4513c0a8c1d

SHA512
3d15d51dd47a27aaf6d27950c90e84bbf3930a6a1affe7bc5c6df0f1830a8e689dc63b32df9745d1ad7b975e230553379bec1001d89a23661dd01f26d255dc9d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-RD9JM.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-RF9B9.tmp\is-HVMO9.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-RF9B9.tmp\is-HVMO9.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\KK80DFFCm3YgVf.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\KK80DFFCm3YgVf.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/2440-155-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/2440-134-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/2440-132-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4508-143-0x0000000000400000-0x0000000001372000-memory.dmp

Filesize
15.4MB

Download
memory/4508-151-0x0000000000400000-0x0000000001372000-memory.dmp

Filesize
15.4MB

Download
memory/4508-147-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4508-142-0x0000000000400000-0x0000000001372000-memory.dmp

Filesize
15.4MB

Download
memory/4508-154-0x0000000000400000-0x0000000001372000-memory.dmp

Filesize
15.4MB

Download

Analysis

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