nymaim | 2a33778533f0bec4c1fab072265cef6832b0a8441d6d71fbfcc91b69d33f4241

Analysis

max time kernel
206s
max time network
246s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
06/12/2022, 16:03

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General

Target
file.exe
Size 3.6MB
Sample221206-thb9dsfd6t
SHA256 2a33778533f0bec4c1fab072265cef6832b0a8441d6d71fbfcc91b69d33f4241
MD5 f5605ff7e95aa5ae6dc7af189e4b7604
SHA1 32773c73f489f1f593feebf8fa9c39e133e1f810
SHA512 768a5916aa6c6386fa2498cfa8a36ddb1dc23139608ce148b4465de6cacd931760b87dc47608428a45a1dfa24f553196463ea7cf53deac85eecb5b22a1d231b1
SSDEEP 98304:OY4gPw0WQ6itGUzu0OrAICPRJ/W1fe6C9uwKbIE:mgI0W3itGYuFsDJ/sepuwKz
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

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
236	is-SQDO3.tmp
1168	PrintFolders.exe
2464	WeJFEUjFrI7RfC.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
236	is-SQDO3.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\is-M96C4.tmp	is-SQDO3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-BEB5I.tmp	is-SQDO3.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-SQDO3.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-SQDO3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-MK4Q2.tmp	is-SQDO3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-DS51H.tmp	is-SQDO3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-UGLR9.tmp	is-SQDO3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5NNA9.tmp	is-SQDO3.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-SQDO3.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
4876	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1168	PrintFolders.exe
1168	PrintFolders.exe
1168	PrintFolders.exe
1168	PrintFolders.exe
1168	PrintFolders.exe
1168	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1168	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4876	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2992 wrote to memory of 236	2992	file.exe	83
PID 2992 wrote to memory of 236	2992	file.exe	83
PID 2992 wrote to memory of 236	2992	file.exe	83
PID 236 wrote to memory of 1168	236	is-SQDO3.tmp	85
PID 236 wrote to memory of 1168	236	is-SQDO3.tmp	85
PID 236 wrote to memory of 1168	236	is-SQDO3.tmp	85
PID 1168 wrote to memory of 2464	1168	PrintFolders.exe	86
PID 1168 wrote to memory of 2464	1168	PrintFolders.exe	86
PID 1168 wrote to memory of 2464	1168	PrintFolders.exe	86
PID 1168 wrote to memory of 4116	1168	PrintFolders.exe	94
PID 1168 wrote to memory of 4116	1168	PrintFolders.exe	94
PID 1168 wrote to memory of 4116	1168	PrintFolders.exe	94
PID 4116 wrote to memory of 4876	4116	cmd.exe	96
PID 4116 wrote to memory of 4876	4116	cmd.exe	96
PID 4116 wrote to memory of 4876	4116	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2992
- C:\Users\Admin\AppData\Local\Temp\is-B6RIC.tmp\is-SQDO3.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-B6RIC.tmp\is-SQDO3.tmp" /SL4 $801C2 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3516858 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:236
- - 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 behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:1168
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\WeJFEUjFrI7RfC.exe
      4⤵
      Executes dropped EXE
      PID:2464
  - - 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:4116
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4876

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.1MB
SHA256 c2eb7537f17ba5d65e54649c37de9362fc10a46291a013242527aa561c0ed5b4
MD5 cd31fdc87f33896b51f91d98273c5d91
SHA1 e9cbd8f57dc55062d4e1000980b800965e963e27
SHA512 1176965a4e16e40bc9eb307a820bfbcdc53be5b6da3a0a68b737909ab0f63240207afdbd7e4c268a55627ae20dfe87c3f93cee2595555d088abf64769b2ca199
SSDEEP 98304:Bmckjd75PniyBESjGrtwQhAN5ps2bBgfsLZ:Bu75FEI
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.1MB
SHA256 c2eb7537f17ba5d65e54649c37de9362fc10a46291a013242527aa561c0ed5b4
MD5 cd31fdc87f33896b51f91d98273c5d91
SHA1 e9cbd8f57dc55062d4e1000980b800965e963e27
SHA512 1176965a4e16e40bc9eb307a820bfbcdc53be5b6da3a0a68b737909ab0f63240207afdbd7e4c268a55627ae20dfe87c3f93cee2595555d088abf64769b2ca199
SSDEEP 98304:Bmckjd75PniyBESjGrtwQhAN5ps2bBgfsLZ:Bu75FEI
MD5 SHA1 SHA512 SSDEEP

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is-SQDO3.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-B6RIC.tmp\is-SQDO3.tmp
Size 687KB
SHA256 cec47d181cf1dad856463fc237ead179ffa5ab1f2aeeec442a99ee83c7db5cb2
MD5 075f33da1ee1e9c480243cac029b3c3e
SHA1 496cba41dd1b8878f7e10c3affb293231ca97ed3
SHA512 3c90572fa0151a9c1d557109f995f2093b9a043808675bd6ff6fd543bf364d826be04d0dfd60062670e4e8edb8f7b24f8bbd5a5f056c3f628aacf2175c3fe8db
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv6jfxOM:y5NoqWolrP837JzHvA6yknyWFxvwxOM
MD5 SHA1 SHA512 SSDEEP

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is-SQDO3.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-B6RIC.tmp\is-SQDO3.tmp
Size 687KB
SHA256 cec47d181cf1dad856463fc237ead179ffa5ab1f2aeeec442a99ee83c7db5cb2
MD5 075f33da1ee1e9c480243cac029b3c3e
SHA1 496cba41dd1b8878f7e10c3affb293231ca97ed3
SHA512 3c90572fa0151a9c1d557109f995f2093b9a043808675bd6ff6fd543bf364d826be04d0dfd60062670e4e8edb8f7b24f8bbd5a5f056c3f628aacf2175c3fe8db
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv6jfxOM:y5NoqWolrP837JzHvA6yknyWFxvwxOM
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-D8L31.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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WeJFEUjFrI7RfC.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\WeJFEUjFrI7RfC.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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WeJFEUjFrI7RfC.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\WeJFEUjFrI7RfC.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/1168-143-0x0000000000400000-0x0000000001810000-memory.dmp

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memory/1168-149-0x0000000000400000-0x0000000001810000-memory.dmp

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memory/1168-156-0x0000000000400000-0x0000000001810000-memory.dmp

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memory/1168-144-0x0000000000400000-0x0000000001810000-memory.dmp

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memory/1168-145-0x0000000000400000-0x0000000001810000-memory.dmp

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memory/1168-150-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2992-132-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/2992-134-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/2992-139-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/2992-157-0x0000000000400000-0x000000000041E000-memory.dmp

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